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An air cored solenoid is of length 0.3 m...

An air cored solenoid is of length 0.3 m, area of cross section `1.2 xx 10^(-3) m^(2)` and has 2500 turns. Around its central section, a coil of 350 turns is wound. The solenoid and the coil are electrically insulated from eachother. Calculate the e.m.f. induced in the coil if the initial current of 3 A in the solenoid is reversed in 0.25 s.

A

0.1056 V

B

1.056 V

C

10.56 V

D

0.01056 V

Text Solution

Verified by Experts

The correct Answer is:
A
`M=(mu_0N_1N_2A_2)/l`
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NARAYNA-ELECTROMAGNETIC INDUCTION-EXERCISE-1 (H.W)
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  2. A rectangular coil of 200 turns and area 100 cm^(2) is kept perpendicu...

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  4. A flip coil consits of N turns of circular coils which lie in a unifo...

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  7. A thin circular ring of area A is perpendicular to uniform magnetic fi...

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  8. A short-circuited coil is placed in a time-varying magnetic field. Ele...

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  9. A train is moving towards north with a speed of 25 m/s. if the vertic...

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  10. A conducting square loop of side L and resistance R moves in its to on...

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  11. A metal rod moves at a constant velocity in a direction perpendicular ...

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  12. A thin flexible wire of length L is connected to two adjacent fixed po...

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  13. A coil has an inductance of 0.05 H and 100 turns and 0.02 A current i...

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  14. A current of 2A is increasing at a rate of 4A//s through a coil of ind...

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  15. The current decays from 5A to 2A in 0.01 s in a coil. The emf induced ...

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  16. A varying current in a coil change from 10A to 0A in 0.5 sec. If the a...

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  17. An air cored solenoid is of length 0.3 m, area of cross section 1.2 xx...

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  18. A solenoid of length 50 cm with 20 turns per cm and area of cross sect...

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  19. The current in a coil is changed from 5A to 10 A in 10^(-2) s. An emf ...

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

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