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A coil of area 10cm^2 and 10 turns is in...

A coil of area `10cm^2` and 10 turns is in magnetic field directed perpendicular to the plane and changing at a rate of `10^8 gauss//s`. The resistance of coil is `20Omega`. The current in the coil will be

A

0.5 A

B

`5`

C

50 A

D

`5 xx 10^8` A

Text Solution

Verified by Experts

The correct Answer is:
B
`i=1/RNA.(dB)/(dt)=1/20xx10xx10^-3xx10^4`
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NARAYNA-ELECTROMAGNETIC INDUCTION-EXERCISE-1 (H.W)
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  2. A closed coil with a resistance 2R is placed in a magnetic field. The...

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  3. A coil of area 10cm^2 and 10 turns is in magnetic field directed perpe...

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  4. A magnetic flux of 500 microweber passing through a 200 turn coil is r...

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  5. A rectangular coil of 200 turns and area 100 cm^(2) is kept perpendicu...

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  6. A coil having an area 2m^(2) is placed in a magnetic field which chang...

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

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  8. A conductor AB of length l moves in x y plane with velocity vec(v) = v...

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  9. To measure the field 'B' between the poles of an electronmagnet, a sma...

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

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

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

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

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

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

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

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

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

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

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

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