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In Fig (a) and (b), two air-cored soleno...

In Fig (a) and (b), two air-cored solenoids `P` and `Q` have been shows. They are placed near each other. In Fig (a), when `I_(P)`, the current in `P`, changes at the rate of `5 A s^(-1)`, an emf of `2 mV` is induced in `Q`. The current in `P` is then switched off, and the current changing at `2 A s^(-1)` is fed through `Q` as shows in the figure. What emf will be induced in `P`?

A

`8xx10^(-4)V`

B

`2xx10^(-8)V`

C

`5xx10^(-3)V`

D

`8xx10^(-2)V`

Text Solution

Verified by Experts

The correct Answer is:
a
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MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-2 (Objective problems (Analytical questions))
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  2. The self inductance of a toroid is :-

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  3. In Fig (a) and (b), two air-cored solenoids P and Q have been shows. T...

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  4. A small square loop of wire of side l is placed inside a large square ...

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  7. A conducting rod of length 2l is rotating with constant angular speed ...

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  8. A conducting rod of 1m length rotating with a frequency of 50 rev/sec....

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  9. A semicircle loop PQ of radius 'R' is moved with velocity 'v' in trans...

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  10. A car moves up on a plane road. The induced emf in the axle connecting...

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  11. If an artificial satellite with metal surface is moving in the equator...

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  12. Which statement ios not correct :-

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  13. A metal aeroplane having a distance of 50 meter between the tips of it...

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  14. The loop shown moves with a velocity v in a uniform magnetic field of ...

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  15. A conducting wheel in which there are four rods of lengthe l as shown ...

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  16. A conducting rod rotates with a constant angular velocity 'omega' abou...

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  17. Two long parallel metallic wires with a resistance 'R' from a horizont...

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  18. A bar magnet is dropped between a current carrying coil. What would be...

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  19. A closed coil consists of 500 turns has area 4 cm^2 and a resistance o...

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  20. A coil of area 500cm^(2) and having 1000 turns is held perpendicular t...

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