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(A) : A spark occur between the poles of...

(A) : A spark occur between the poles of a switch when the switch is opened.
(R) : Current flowing in the conductor produces magnetic field.

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AAKASH SERIES-ELECTROMAGNETIC INDUCTION-Exercise (Short Answer Questions)
  1. A circular loop of wire is carring a current i (as shown in the figure...

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  2. Figures 1 and 2 show planar loops of different shapes moving out or in...

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  3. Use Lenz's law to determine the direction of induced current in the si...

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  4. A conducting loop is held stationary normal to the field between the N...

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  5. (a) A closed loop is held stationary in the magnetic field between the...

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  6. (a) A closed loop is held stationary in the magnetic field between the...

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  7. (A): An induced current develop in a conductor moved in a direction pa...

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  8. An iron bar falling vertically through the hollow region of a thick cy...

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  9. A small resistor (say, a lamp) is usually put in parallel to be curren...

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  10. The figure shows a circuit. When the circuit is switched on, the amm...

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  11. As soon as current is switched on in a high-voltage wire, the bird sit...

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  12. A wire of fixed length is wound on a solenoid of length 'l' and radius...

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  13. (A) : A spark occur between the poles of a switch when the switch is o...

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  14. The figure shows the magnetic field of a current carrying coil and a r...

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  15. A copper ring is suspended by a thread. One end of a magnet is brought...

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  16. A: When a bar magnet is dropped into a vertical long hollow metallic t...

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  17. In the above problem if block is released from there, what would be ma...

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  18. A lamp in a circuit consissing of a coil of large number of turns and ...

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  19. The magnitude of electric current is increasing in a wire at a constan...

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  20. Assertion:- A piece of copper and a similar piece of stone are dropped...

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