Magnetic field strength is more in that region.d. The magnitude of magnetic field is directly proportional to the strength of the electric current flowing in the wire. Nobody talks about the "Conventional Charge!" The populations of little dots move through each other without any dots colliding. AC voltage can be increased or decrease with the help of a transformers. Question. This ensures the safety of the user. Question 10. Therefore, as far as most electrical devicesand circuits are concerned, it makes no difference if the current is made of positive particles going one way, or negative particles going the other or halfas many negatives flowingbackwards through a crowd of half as many positives.Put simply, the"Ampere" doesn't care about the direction or speed of the flowing particles.So, in order to simplify our measurements and our mental picture of ElectricCurrents, we cut away the unused parts of the picture. But the"electricity" in common electrical devices is limited to positive protons andnegative electrons. The postive atoms behave like flowing protons, but protons with entire atoms attached. Therefore, as far as most electrical devicesand circuits are concerned, it makes no difference if the current is made of positive particles going one way, or negative particles going the other or halfas many negatives flowingbackwards through a crowd of half as many positives.Put simply, the"Ampere" doesn't care about the direction or speed of the flowing particles.So, in order to simplify our measurements and our mental picture of ElectricCurrents, we cut away the unused parts of the picture. Then we can use thesemeters everywhere. all of a sudden supply of high voltage andb. Electric generator is based on the phenomenon of electromagnetic induction i.e., a changing magnetic field in a conductor induces an electric current in the conductor. On the other hand, if current in a conductor flows in the downward direction, then the direction of the magnetic field around the conductor is in clockwise direction. Answer:The movement of electrons takes place in the conductor in a particular direction when current is passed through it. Answer: Give reason to support your answer. Question 2. AC can be step up for transmission over a longer distances with less power loss. In India, the alternating current changes direction after every \(\frac {1}{100}\) second, so the frequency of alternating current is 50 Hz. And it's only true for solidmetals. Q.2. And that trick holds the answerto the question.Electric currents produce three main effects: magnetism, heating, and the voltage drop across resistive conductors. Consider a circular wire lying in the plane of the table and the direction current in it is antilock wise. On the basis of these graphs list two differences between the two currents.e. We don't care about their speed, and we don't care about their number. from positive terminal to negative terminal. (c) compass is moved away from the conductor? Horizontal component of earths magnetic field at a place is uniform and its direction is south to north. Magnetic effect of current was discovered by (a) Oersted (b) Faraday (c) Bohr (d) Ampere Answer/Explanation 2. Consider two points A and B at equal distances from the wire, respectively above and below it. Answer: Hence, the current carrying solenoid behave as a bar magnet.Use of current carrying solenoid: It is used to form a temporary magnet called electromagnet as well as permanent magnet. Describe an activity to draw magnetic field lines around a bar magnet from one pole to another pole.Answer:Magnetic field is the space around a magnet or a current carrying conductor in which its magnetic force can be experience.Fix a plane white drawing sheet on a drawing board. Question 1. Ourown nervous system is based on the two-way currents. For more updates, keep logging on BrainyLads. It can happen when many electrical appliances of high power ratings are connected in a single socket. (b) use of fuse. Question 4. Question 3. (i) Split ring It reverses the dissection of current in the armature and thus direction of force is also reserved. (a) It states that you are holding a current carrying straight conductor in your right hand such that the thumb points towards the direction of current. These threetypes of meter will agree that a"current" is a"current" regardless of the particle polaritiesand flows. (iii) The magnetic field produced will increase because magnetic field produced is directly proportional to the number of turns in the coil. Question and Answer forum for K12 Students. It cannot detect real current, instead itonly measures our conventionally-defined simple current. (b) use of fuse. (b) List the factors on which the strength of the magnetic field due to a straight conductor carrying current depend. It may be due to damage of insulation of wire. There is apowerful flow of electric charge going through the battery, yet no individual electrons flow through the battery at all. But to measure currents, won't we first need to measure how much of the current is composed of negative particles going one way, and of positive particles the other? The Amps would not quite match avisual picture of moving particles.But if we truely believe that the amperes are real,we might start to doubt the existence of flowing charges. In coil A, magnetic field lines [increased in case (i) and decreased in case (ii)] induce a potential difference across the coil A which sets up induced electric current in coil A. Function of the brushes: The carbon brushes are fixed while slip rings rotate along with the armature. electric current has magnitude as well as direction. Place a bar magnet in the middle of the drawing sheet and draw its boundary with a sharp pencil. We don't care about their speed, and we don't care about their number. Hans Christian Oersted (1777-1851) Oersted showed that electricity and magnetism are related to each other.His research later used in radio, television etc. Mark the north and south poles in the diagram.Answer:The pattern of the magnetic field lines is as shown in figure. They are very common, they allaround us; as close to us as they can possiblybe.Non-electron Charge-flowFor example, if you were to poke your fingers into the back of an old-style television set, you would suffer a dangerous or lethal electric shock. Question 5. positive to negative terminal through the circuit. The direction of the magnetic field at a point will be North to South (a) directly above the wire (b) directly below the wire (c) at a point located in the plane of the paper, on the north side of the wire (d) at a point located in the plane of the paper, on the south side of wire. These threetypes of meter will agree that a"current" is a"current" regardless of the particle polaritiesand flows. Again I askyou, what is the REAL direction ofelectric currents?We cannot solve the problem by belittling it, or by pretending that two-way currentspertain only to something exotic, or pretendthat it's all completely separate from everyday life. Strength of magnetic field is doubled when the current through the loop is doubled B I .b. AC can be transmitted by changing it at high voltage with the help of transformer to minimise loss in transmission. The field is uniform inside the solenoid. But in letting the positive charges take over, some nagging questions are leftbehind, such as"WHICH WAY DOES THE ELECTRICITYREALLYFLOW?" If a current greater than a particular values flows in the circuit it will melt and circuit is broken andstops power supply in the circuit. When coil is moved towards a stationary magnet, the magnetic field associated with the coil will change and so current will be induced in the coil. Magnetism, heating, and voltage drop together represent nearly every feature that's important in everyday electrical circuitry. Answer:The magnetic field is in the form of parallel lines. There's a genuine difference between the simplified pictureversus the actualparticle flows. (b) Principle of working of electric motor: A currentcarrying coil placed in a magnetic field experience a torque. (iv) Sprinkle iron filings uniformly on the cardboard. (i) A compass needle gets deflected when brought near a current carrying conductor. (1) Which phenomenon is shown in figure. Support your answer with the help of a labelled circuit diagram. This wastes reactor space - particularly space on the surface of the catalyst.The temperatureEquilibrium considerationsYou need to shift the position of the equilibrium as far as possible to the right in order to produce the maximum possible amount of ammonia in the equilibrium mixture.The forward reaction (the production of ammonia) is exothermic.According to Le Chatelier's Principle, this will be favoured if you lower the temperature. Question. (i) Yes, Alpha particles being positively charged constitute a current in the direction of motion. In an electric generator, the magnetic field in the conductor is changed by moving the conductor in the magnetic field of the magnet. So the degree of deflection of the compass should decrease instead of increasing. The thumb indicates the direction of current in the straight conductor held by curled fingers, whereas Flemings left-hand rule gives the direction of force experienced by current carrying conductor placed in an external magnetic field. His younger sister asked some questions and Ravi answered? There's a genuine difference between the simplified pictureversus the actualparticle flows. Might we eventually start believing that this oversimplified concept of positive electric current is REAL? The conventional current must be a flow of conventional charge, so first we should teach our students about the existence of oversimplified charges,"conventional charges," charges which we pretend are inside all the wires. We don't care about their speed, and we don't care about their number. Question 2. What is the principle of electric motor? Increasing the number of turns in the coil. But for more than 99% ofelectricity and electronics, the direction of the particles is irrelevant, and anammeter tells us the so-called"real" current while hiding the true particle flows.Or to put it simply: we pretend that"electric currents"are always composed of POSITIVE particles of unknown speed, so that any negative currentsare defined as positive particles flowing backwards ratherthan negative particles flowing forwards.Confusing students for two hundred yearsWe do cause some problems by choosing a positive charge convention. (b) How is the direction of magnetic field at a point determined? (ii) Because of large curvature of magnetic field lines at centre. The conventional current must be a flow of conventional charge, so first we should teach our students about the existence of oversimplified charges,"conventional charges," charges which we pretend are inside all the wires. While trying to understand electric circuits and electrical measurements, we need a simpleway to take measurements of this important entity named"Electric Current." (i) What is the direction of magnetic field lines outside a bar-magnet? $ Find the percentage drop in light intensity at a point if the supply voltage is changed from $ 220V $ to $ 200V $ . The direction of magnetic field at a point will be from North to South : (a) Directly above the wire. Actually, in some conductors the electric currents area flow of genuinely positive charges, while in others the flows are indeed negative particles. Answer: Question 19. And sometimes the currentsare both positive andnegative particles flowing at once, but in opposite directions within the same conductor.We cannot arbitrarily proclaim which way the charges"flow," sincetheir true direction always depends on the type of conductive material.Electricity ismore than just electrons"Electricity" is not made of electrons(or to be more specific, Electric Charge, which is sometimes called"Quantity of Electricity," is not made of electrons.) An electromagnet works on the principles of magnetic effect of current. . During your painful experience there obviously was a considerable current directed through your body. Answer: Question 3. Therefore, as far as most electrical devicesand circuits are concerned, it makes no difference if the current is made of positive particles going one way, or negative particles going the other or halfas many negatives flowingbackwards through a crowd of half as many positives.Put simply, the"Ampere" doesn't care about the direction or speed of the flowing particles.So, in order to simplify our measurements and our mental picture of ElectricCurrents, we cut away the unused parts of the picture. Answer:(i) Increase in number of turns in the solenoid. Answer: Magnetic field due to current in a solenoid. Question 1. There is a simple answer, but firstBatteries are another example of non-electron or "ionic" conductors. Write down the properties of magnetic field lines. The flowing negativesand positives are usually not equal,and the speed of the positives in one direction is usually not the same as the speed of the negatives in the other. Might we eventually start believing that this oversimplified concept of positive electric current is REAL? )PSThis over-simplified fake electric current measured by ammeters is commonly called"Conventional Current." What is the frequency of A.C. (alternating current) in India? Question 15. Insteadweintentionally define"electric current" as being a flow of exclusively positive particles flowing in one particular direction. Only one value, a unique net value, can exist. Youwould do this if it is particularly important to use up as much as possible of the otherreactant - if, for example, it was much moreexpensive. Battery electrolyte is veryconductive. (ii) After some time current reaches maximum and becomes constant in P coil. If a hundred positive particles flow to the left per second, this givesexactlyas much magnetism, heating, and voltage as a hundrednegativeparticles flowing to the right per second. Answer: Insteadweintentionally define"electric current" as being a flow of exclusively positive particles flowing in one particular direction. positive terminal to the negative terminal. If in a given region, lines of field are shown to be parallel and equispaced, the field is understood to be uniform. It cannot detect real current, instead itonly measures our conventionally-defined simple current. And sometimes the currentsare both positive andnegative particles flowing at once, but in opposite directions within the same conductor.We cannot arbitrarily proclaim which way the charges"flow," sincetheir true direction always depends on the type of conductive material.Electricity ismore than just electrons"Electricity" is not made of electrons(or to be more specific, Electric Charge, which is sometimes called"Quantity of Electricity," is not made of electrons.) (ii) It also depends upon the direction of current flowing through the conductor. Why is electromagnetic induction so called? We mightlose track of the fact that there are real, visible particles flowing along inside that circuit, or that these particles have an actual average speed, mass, and direction.Because"amperes" are so incredibly useful, the simplified interpretation of Current takes over and becomes more real than reality. The fuse is rated for a certain maximum current and blows off when a current more than the rated value flows through it. (c) A very good method to produce magnetic field is due to flow of current in a solenoid. Insteadweintentionally define"electric current" as being a flow of exclusively positive particles flowing in one particular direction. Rule: Flemings right-hand rule. Draw the pattern of lines of force due to a magnetic field through and around a current carrying loop of wire. During the electric current, the positive atoms flowed in one direction, while the negative atoms simultaneously flowed in the other. If a hundred positive particles flow to the left per second, this givesexactlyas much magnetism, heating, and voltage as a hundrednegativeparticles flowing to the right per second. The real charges are too complicated to deal with, and theadded complexity gets us very little information as long as we're only interested involtage drop, magnetic fields, and heating.Particle-flow is real, "Amperes" are notOnce we start ignoring the speed and direction of the charges, then we can easily build electrical instruments or"amp meters" which measure the Conventional Electric Current in terms of the magnetism which the charge-flow creates or by the voltage drop which appears across a resistor,or by the temperature rise being created in a calibrated pieceof resistance wire. (iii) As it is stationary no change in magnetic flux linked with coil, so galvanometer shows no deflection. If coil P is moved towards Q, will some current be induced in coil Q? When is the force experienced by a current carrying conductor placed in a magnetic field greatest?Answer:When the current in the conductor flows perpendicular (90) to the direction of the magnetic field, maximum force is generated. Extra Questions Of Chapter 13 Class 10 Science Question 6. But in letting the positive charges take over, some nagging questions are leftbehind, such as"WHICH WAY DOES THE ELECTRICITYREALLYFLOW?" current moves from higher potential to lower potentisl, direction of electric current is always opposite positive terminal, direction of electric current is opposite to direction of flow of electron mean electron move from (-)ive terminal to (+)ive so direction of current will be (-) to, direction of electric current is opposite to direction of holes. It ensures that any leakage of current to the metallic body of an appliance keeps it potential same as of earth. (This figure also varies from plant to plant.) When current in the coil C1 is switched off.c. Answer: For example, what happens if we all spend many years thinking in terms of such simplified"electric current?" Answer: Current drawn by electric ovenCurrent rating of the circuit = 5 ASo, fuse will blow off and power supply will cut off. In reality the electrons andprotons carry electric charges ofequalstrength.If electrons are"electricity", then protons are"electricity" too.Now everyone will rightly tell methat the protons within wires cannot flow, while the electrons can. The closer the field lines, the stronger is the field. (Note: this is because reversing the polarity of the particles reverses the current, and reversing the particle direction reverses the current again! (a) The magnetic lines of force do not intersect (or cross) one another. Ourown nervous system is based on the two-way currents. What is short-circuiting in an electric supply?Answer:When a neutral wire and live wire come in contact with each other short circuit takes place. Why? ORWhat type of core should be put inside a current-carrying solenoid to make an electromagnet?Answer:Soft Iron. Answer (c) Q.2. 10th grade. A manufacturer is trying to produce as muchammonia as possible per day. In nearly every situation they willtell us all we could ever want to know about flows of charged particles in any circuit. On applying Flemings left-hand rule we find that force acting on arm AB due to magnetic field pushes it downwards. 0 times. All we care about is the total net charge which moves past a particular point in the circuit. Inside the magnet they move from south pole to north pole. (b) Direction of deflection is reversed. The flowing negativesand positives are usually not equal,and the speed of the positives in one direction is usually not the same as the speed of the negatives in the other. (ii) When key is closed, there is deflection in galvanometer. Name the alloy which is mainly used for making permanent magnets. Reverse the direction of current flowing through the rod and observe the direction of its displacement. (a) State Flemings left hand rule. Question 7. Question. Battery electrolyte is veryconductive. During the electric current, the positive atoms flowed in one direction, while the negative atoms simultaneously flowed in the other. We makethe negative particles positive,then add their current to any positive particles which were flowing forward. (i) MRI or Magnetic Resonance Imaging is based on magnetic effect of electric current. Actually, in some conductors the electric currents area flow of genuinely positive charges, while in others the flows are indeed negative particles. NCERT Extra Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current with Answers will help to score more marks in your CBSE Board Exams. B1 & B2 - Brushes. You can't go far wrong in an exam quoting 200 atmospheres.RecyclingAt each pass of the gases through the reactor, only about 15% of the nitrogen andhydrogen converts to ammonia. North and South pole at its ends and it acquires the directive and attractive properties similar to bar magnet. Question. )Two-way currents are commonThere are many other places where these kinds of positive/negativecharge flows canbe found. In the following list of devices-materials, the electric charges found within the conductors are a combination of movable positive and negative particles. (c) A fuse of appropriate current rating should be used with the electric circuit. (ii) Strong field magnet- two pole pieces of a strong magnet provides a strong magnetic field. Question. It indicates a uniform magnetic field because magnetic field lines are parallel. In this way electric energy supplied to motor is converted into mechanical energy. Question. In the following list of devices-materials, the electric charges found within the conductors are a combination of movable positive and negative particles. (c) Draw a schematic labelled diagram of a domestic circuit which has a provision of a main fuse, meter, one light bulb and a switch socket.Answer:a. This is due to the reason that electric current can be produced with the help of varying magnetic field without any physical contact of the source of magnetic field and the conductor. Describe the magnetic field produced due to current-carrying circular loop. This modifies the already existing earths magnetic field and a deflection results. That means that the running costs of your plant are very high.The compromise200 atmospheres is a compromise pressure chosen on economic grounds. The direction of electric current flow is a little difficult to understand to those who have been taught that current flows from positive to negative. b.It is dangerous to touch the live wire of the main supply rather than neutral wire. Besides giving the explanation of (a) radius of the coil What is the frequency of ac in India?e. Calculate the force acting on the charge. Question. Answer: Again I askyou, what is the REAL direction ofelectric currents?We cannot solve the problem by belittling it, or by pretending that two-way currentspertain only to something exotic, or pretendthat it's all completely separate from everyday life. A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor with the help of a magnetic compass. The linkgives 16,000 google hits. Adding a catalyst doesn't produce any greater percentage of ammonia in the equilibrium mixture. An amp-meter mightnot be appropriate whenused in an exotic physics experiment. Fuse is connected in series in the circuit. The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points. This deflection indicates that a momentary current is produced in the coil. Battery electrolyte is veryconductive. About half of the charge-flow is composed of positive atoms, and the remaining portion is composed of negative atoms flowing backwards. (a) Describe an experiment with a diagram to show that force is exerted on a current carrying conductor when placed perpendicular in a magnetic field. Yes, but weonlyneed this information if we want to knoweverythingabout the electriccurrent. Heating effect of currentb. Question 1. (a) More the radius weakere the field. Question. Question. Now the connections of terminals of the cell of the lower emf is reversed, then the balancing length is obtained at 3 cm. The direction of pressure flow is opposite to the direction of flow of water Question 13. (a) What is short circuiting? Define electromagnetic induction? (b) Overloading means large amount of current flows in the circuit. Join all the marked points. In nearly every situation they willtell us all we could ever want to know about flows of charged particles in any circuit. Question. it is towards the flow of positive charge and negative to the flow of negative charge( electrons). So Minimum at point B; Maximum at point A. (a) Draw the pattern of magnetic field lines through a bar-magnet and around a current carrying solenoid. Imagine a current-carrying straight conductor is held in right hand such that the thumb points towards the direction of current. (b) (i) No two magnetic field lines intersect with each other at any point. An electron enters a magnetic field at right angles to it as shown in fig. AB is a current carrying conductor in the plane of the paper as shown in the Figure. Question.What are magnetic field lines? Give reason for you answer and name the phenomenon involved. Electronics teachers and authorsof textbooksare often chided for passing on an "error" to their students. towards positive terminal to negative terminal because those time e- wasn't discovered so that people think positive, the current flows from positive to negative.I think it will help u, The actual direction of movement of current is from -ve to +ve conventionally movement of current is from +ve to -ve, Electric Current Is A Scaler!Not A Vector so They Have Not Any DIR, from positive terminal to negative terminal ( opposite to the direction of flow of electrons in the circuit). Answer: is preferred over D.C. because it can be transmitted over long distance without much loss of energy.D.C. You will get magnetic lines of force. Which region has stronger magnetic field. That will causethe pressure to fall again.In order to get as much ammonia as possible in the equilibrium mixture, you need as high a pressure as possible. Zero. Might we eventually start believing that this oversimplified concept of positive electric current is REAL? State one factor/condition that can lead to it. (ii) the degree of deflection of the magnetic compass increases when the current through the conductor is increased. The negative atoms behave like electrons which are dragging an entire atom alongwith them.So, inside humanflesh which direction did the electric current REALLY go? The electric charges in a human body are entirely composed of positive and negative chargedatoms or "ions." idea that electric current is a flow of positive particles in one direction, when supposedly it's really a flow of negative electrons going the other way.In fact, the chiders are wrong. Support your answer with a reason. )Two-way currents are commonThere are many other places where these kinds of positive/negativecharge flows canbe found. What is the frequency of DC? because all the experimental result theory are based on the + to - direction because I was believed before so. If we did this, then"conventional current" would bemuch easier to accept, no?,. moved quick away from the coil?Answer:When a bar magnet is moved towards the coil there is change in magnetic field ina. Question. (c) Name a device that uses the above principle.Answer:a. Question 6. Question 9. The strength of magnetic field is directly proportional to the magnitude of current passing through the straight conductor. We don't care about the real polarity of the particles. (c) List two advantages of parallel connection over series connection.Answer:(a) Errors in the circuit(i) Fuse wire is connected in neutral wire (N) where as it must be connected in live wire (L). Short circuting: Whenever live and neutral wires come in contact with each other, the incident is called short circuiting. Youwould do this if it is particularly important to use up as much as possible of the otherreactant - if, for example, it was much moreexpensive. The postive atoms behave like flowing protons, but protons with entire atoms attached. Weignore both the chemical effects and the effects of the velocity and direction of moving particles.We ignore the collisions between positive and negative particles. The north end of the needle of a compass indicates the direction of magnetic field at a point where it is placed. Yes, but weonlyneed this information if we want to knoweverythingabout the electriccurrent. Direction of Electric current (Current Electricity Lec:2) - YouTube Class :12th, Subject : Physics, Topic:- Direction of Electric current(Current Electricity lecture:. Inside the magnet, the field lines moves (a) from north to south (b) from south the north The catalyst ensures that the reaction is fast enough for a dynamic equilibrium to be set up within the very short time that the gases are actually in the reactor.Separating the ammoniaWhen the gases leave the reactor they are hot and at a very high pressure. All we care about is the total net charge which moves past a particular point in the circuit. Answer: Observe the pattern of the magnetic field lines. Battery electrolyte is veryconductive. Not right to left, not left to right, but inboth directions atonce. Answer: Question 11. But inside the battery's wet electrolyte, the charge-flow goesin two opposite directions at the same time. The supply voltage is 220 V.Answer:I =Total Power/V=nP /V=2 X 1.1kW/220V=2 X 1.1 X 1000 /220V W= 10 ASo a fuse wire of rating must be greater than 10 A. By convention, we define the flowing charges to be positive. Question. If the pressure used is too high, the cost of generating it exceeds the price you can get for the extra ammonia produced.The catalystEquilibrium considerationsThe catalyst has no effect whatsoever on the position of the equilibrium. Of course in metal wires outside thebattery, the real particle flow is only from negative to positive. Name and explain the rule to determine the direction of force experienced by a current carrying conductor in a magnetic field. State the principle of an electric generator.Answer: An electric generator is based on the principle of electromagnetic induction. We mightlose track of the fact that there are real, visible particles flowing along inside that circuit, or that these particles have an actual average speed, mass, and direction.Because"amperes" are so incredibly useful, the simplified interpretation of Current takes over and becomes more real than reality. Coil P is connected to battery and key the coil S is connected to galvanometer. Question. it towards one side of wire We see deflection in galvanometer This is because movement of magnet has created an electric current . Down inside the battery, within the wet chemicals between the two plates, the amperes of flashlight currentappears as a flowof both positive and negative atoms. Describe domestic electric circuits. The coil of an electric bulb takes $ 40W $ to start glowing. in an electric generator, mechanaical work is done to turn the armature. Question. Write the 6 fundamental rights of India and explain in detail, Write a letter to the principal requesting him to grant class 10 english CBSE. That means that the running costs of your plant are very high.The compromise200 atmospheres is a compromise pressure chosen on economic grounds. Question 19. The populations of little dots move through each other without any dots colliding. If they do so then at the point of intersection, two tangents can be drawn at that point which indicates that there will be two different directions of the same magnetic which field, i.e. We stop thinking of current as being a flow of real physical particles. (b) Given P = 2 kW and V = 200 volt,Power, P = VI I =p/vI = 2000/220 =9.09 AThe rating of the fuse wire is 10 A which is greater than current drawn by air conditioner so when air conditioner is switched on, fuse will not blow off. (b) Flemings left hand rule is used to find the direction of force exerted on a current-carrying conductor placed in a magnetic field as in electric motor. (iii) Brushes- Brushes are made up of carbon which are pressed against the slip rings and are connected to external circuit where output is obtained. DNA testing)*.air cleaners, smoke precipitators, air ion flows*.particle beams*.the vertical"sky current" in the atmosphere*.gas discharge, which includes:*.electric sparks*.fluorescent tubes*.sodium and mercury arc streetlights*.neon signs*.the Earth's Aurora*.lightning and corona discharges*.arc welders*.Geiger counter tubes*.thyratron tubes*.mercury vapor rectifiersThis list is not so short. Class 10 Magnetic Effect Of Electric Current Extra Questions Question 3. What result would you expect? This wastes reactor space - particularly space on the surface of the catalyst.The temperatureEquilibrium considerationsYou need to shift the position of the equilibrium as far as possible to the right in order to produce the maximum possible amount of ammonia in the equilibrium mixture.The forward reaction (the production of ammonia) is exothermic.According to Le Chatelier's Principle, this will be favoured if you lower the temperature. Write down its principle of working. (ii) withdrawn from inside the coil(iii) held stationary inside the coil?Answer:(i)When a bar magnet is pushed into the coil of insulated copper wire connected to a galvanometer, galvanometer gives a deflection towards left. Magnetic field has both direction and magnitude. Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it. Field lines cannot cross each other as two values of net field at a single point cannot exist. [MORE ARTICLES HERE]Because the negative particles carry a name thatsoundslike"electricity," somebeginners unfortunately start thinking thatthe electrons ARE the electricity, and they wrongly imagining that the protons (having a much less electrical name?) Answer: (a) On observing the field lines, it shows that magnetic field due to the current carrying circular loop is maximum and normal to the current carrying loop at its center because magnetic field due to each part of loop adds up. Since electric current is a uniform flow of electrons, its direction is opposite to the flow of electrons. Question. Question. When this happens the direction of current in the coil is reversed. [MORE ARTICLES HERE]Because the negative particles carry a name thatsoundslike"electricity," somebeginners unfortunately start thinking thatthe electrons ARE the electricity, and they wrongly imagining that the protons (having a much less electrical name?) Let us now hold the forefinger, middle finger and thumb of our left-hand at right angles to one another. Question. Magnetism, heating, and voltage drop together represent nearly every feature that's important in everyday electrical circuitry. Answer: Class 10 Class 10 Maths; Class 10 Science; . Name some devices in which electric motors are used.Answer: Electric motors are used in all devices where we want to convert electrical energy into Mechanical energy. It is used as a safety measure to ensure that any leakage of current to a metallic body of an appliance does not give any severe shock to the user. The strength of magnetic field is directly proportional to the magnitude of current passing through the straight conductor. Question. Answer: Write down advantage of AC over DC? When current passes through the coil, it flows in arms CB and AD in a direction perpendicular to the magnetic field. AC voltage can be increased or decreased. Can you determines the north and south poles of a current carrying solenoid with the help of a bar magnet? Sometimes, the number of appliances which are switched on at the same time have power more than the capacity of the line. motion of the conductor. imgWhen current is flowing through the solenoid, the magnetic field line pattern resembles exactly with those of a bar magnet with the fixed polarity, i.e. The magnetic field produced by a current carrying wire at a given point depends directly on current passing through it. 200 atmospheres is a high pressure, but not amazingly high.Rate considerationsIncreasing the pressure brings the molecules closer together. A few text and reference books even outright state this, saying that electricity is composed of electrons. However,no electronsflowed through your body at all. Pass the current in the wire. The insulated copper wire is wrapped on a soft iron piece. Justify your answer. are not electrical. According to Flemings right hand rule, which part of right hand indicate the movement of conductor?Answer: Thumb. This wastes reactor space - particularly space on the surface of the catalyst.The temperatureEquilibrium considerationsYou need to shift the position of the equilibrium as far as possible to the right in order to produce the maximum possible amount of ammonia in the equilibrium mixture.The forward reaction (the production of ammonia) is exothermic.According to Le Chatelier's Principle, this will be favoured if you lower the temperature. Teachers promote the(wrong?) Answer:Force on a-particle will be in the upward direction as per Flemings left hand rule. It is a wire of an alloy with low melting point. If the direction of the field and that of the current are mutually perpendicular to each other, then the force acting on the conductor will be perpendicular to both as given by Flemings left-hand rule. Answer:The force will act in upward direction given by thumb, if forefinger points in the direction of magnetic field and the middle finger points in the direction of current, according to Flemings left hand rule. Weignore both the chemical effects and the effects of the velocity and direction of moving particles.We ignore the collisions between positive and negative particles. And these three effectsdon't careabout the amounts of positive and negative particles, or about their speed, their mass, their charge, etc. direction of electric current is opposite to direction of electron, The current flows from negative to positive terminal, direction of electric current is high voltage to low voltage. when magnet is moved quickly away from the coil again there is change in magnetic field associated with the coil so again a current is induced but in the opposite direction. If a current carrying straight conductor is placed is east-west direction, then the direction of the force experienced by the conductor due to earth's magnetic field is: (a) downward (b) upward (c) east-west (d) west east Answer Question. Question. (iii) For finding the direction of current induced in a coil we use Flemings right hand rule. Then we can use thesemeters everywhere. (a) Write the values of the following physical quantities in connection with domestic power supply in our country: (i) potential difference between live wire and neutral wire. Solenoid is a coil of many turns of wire, wrapped in the shape of a cylinder. If you have an excess of one reactant there will be molecules passing through the reactor which can't possibly react because there isn't anything for themto react with. When an electric current is createdwithin a solid copper wire, the"electron sea" moves forward, but the protons within the positive atoms ofcopper do not.However,solid metals are not the only conductors,and in many other substances the positive atoms*do* move, and they *do* participate in the electric current. Answer:A current carrying solenoid behaves like a bar magnet. Answer: Question. Define electromagnetic induction. The real charges are too complicated to deal with, and theadded complexity gets us very little information as long as we're only interested involtage drop, magnetic fields, and heating.Particle-flow is real, "Amperes" are notOnce we start ignoring the speed and direction of the charges, then we can easily build electrical instruments or"amp meters" which measure the Conventional Electric Current in terms of the magnetism which the charge-flow creates or by the voltage drop which appears across a resistor,or by the temperature rise being created in a calibrated pieceof resistance wire. Weignore both the chemical effects and the effects of the velocity and direction of moving particles.We ignore the collisions between positive and negative particles. 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