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State Lenz's law....

State Lenz's law.

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According to Lenz.s law, induced emf or current is always produced in a direction such that it opposes the cause of its generation.
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Explore conceptually related problems

(a) State Lanz's law. Give one example to illustrate this law. "The Lenz's law is a consequence of the principle of conservation of energy." Justify this statement. (b) Deduce a expression for the mutual inductance of two long coaxial solenoids but having different radii and different number of turns.

State Henry's law.

Select correct statement about Lenz's law

Asseration: Time dependent magnetic field generates electric field. Reason: Direction of electric field generated from time variable magnetic field does not obey Lenz's law.

Which of the following figure correctly depicts the Lenz’s law. The arrows show the movement of the labelled pole of a bar magnet into a closed circular loop and the arrows on the circle show the direction of the induced current

Modern train are based on maglev technology in which trains are magntically levitated, which runs its EDS maglev system. There are coils on both sides of wheels. Due to motion of the train, current induces in the coil of track which levitate it. This is in accordance with Lenz's law. If train lowers down then due to Lenz's law, repulsive force increase due to which train gets uplifted and if it goes much higher then there is a net downward force due to gravity. The advantage of Maglev trains in that there is no friction between the train and the track, thereby reducting power consumption and enabling the train to attain very high speeds. Disavantage of Maglev train is that as it slows down, the electromagnetic forces decreases and it becomes difficult to keep it levitaited and as it moves forward according to Lenz's law there ia an electromagnetic drag force. What is the disadvantage of this system?

Modern train are based on maglev technology in which trains are magntically levitated, which runs its EDS maglev system. There are coils on both sides of wheels. Due to motion of the train, current induces in the coil of track which levitate it. This is in accordance with Lenz's law. If train lowers down then due to Lenz's law, repulsive force increase due to which train gets uplifted and if it goes much higher then there is a net downward force due to gravity. The advantage of Maglev trains in that there is no friction between the train and the track, thereby reducting power consumption and enabling the train to attain very high speeds. Disavantage of Maglev train is that as it slows down, the electromagnetic forces decreases and it becomes difficult to keep it levitaited and as it moves forward according to Lenz's law there ia an electromagnetic drag force. What is the advantage of this system?

Modern train are based on maglev technology in which trains are magntically levitated, which runs its EDS maglev system. There are coils on both sides of wheels. Due to motion of the train, current induces in the coil of track which levitate it. This is in accordance with Lenz's law. If train lowers down then due to Lenz's law, repulsive force increase due to which train gets uplifted and if it goes much higher then there is a net downward force due to gravity. The advantage of Maglev trains in that there is no friction between the train and the track, thereby reducting power consumption and enabling the train to attain very high speeds. Disavantage of Maglev train is that as it slows down, the electromagnetic forces decreases and it becomes difficult to keep it levitaited and as it moves forward according to Lenz's law there ia an electromagnetic drag force. Which force causes the train to elevate up?

State Newton's law of gravitational.

State Newton's law of gravitation.

AAKASH SERIES-ELECTROMAGNETIC INDUCTION-Exercise (Very Short Answer Questions)
  1. Name the scientists who discovered the generation of electric current ...

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  2. Name the scientist associated with the direction of induced current.

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  3. State Lenz's law.

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  4. Why the induced emf is also called as back emf?

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  5. What is the basic cause of induced emf?

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  6. Does Lenz's law violate the law of conservation of energy?

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  7. Does Lenz's law hold for an open circuit

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  8. Consider a cube ABCGHIJK of sides a placed in a uniform magnetic field...

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  9. Who discovered eddy current?

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  10. What is an ideal inductor?

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  11. Name the quantity that plays an identical role in an electrical circui...

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  12. The induced e.m.f. in a coil does not depend on

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  13. Name two factors on which the self-inductance of an air-core coil depe...

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  14. What is the effect of metallic core on self inductance?

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  15. Why inductors are made of copper?

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  16. Name two factors on which mutual inductance between a pair of coils de...

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  17. If two coils are very tightly would one over the other, will M increas...

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  18. What are the dimensions of L/R?

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  19. Why the inductance per unit length for a solenoid near its centre is d...

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  20. An artificial satellite with a metal surface is orbiting the earth in ...

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