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A coil of 30 turns of wire each of 10 cm...

A coil of `30` turns of wire each of `10 cm^(2)` area is placed with its plance perpendicular to a magnetic field of `0.1 T`. When the coil is suddenly withdraw from the field, a galvanometer connected in series with the coil indicated that a `10 mu C` charge passes around the circuit. The combined resistance of the coil and galvanometer is

A

`3 Omega`

B

`30 Omega`

C

`300 Omega`

D

`3000 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
`q=(dphi)/R=(NA(B_1-B_2))/R`
`10 mu c=(30xx10^(-3)(0.1-0))/R, R=300 Omega`
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NARAYNA-ELECTROMAGNETIC INDUCTION-EXERCISE-2 (H.W)
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  7. A straight rod of length l si rotating about axis passing through O is...

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  8. A rod of length 10 cm made up of conducting and non-conducting materia...

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  9. A triangular wire frame (each side =2m) is placed in a region of time ...

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  10. A uniform magnetic field of induction B is confined to a cyclindrical ...

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  11. The e.m.f. induced in a secondary coil is 20000 V when the current bre...

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