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A magnet is taken towards a conducting r...

A magnet is taken towards a conducting ring in such a way that a constant current of `10mA` is induced in it. The total resistance of the ring is `0.5Omega`. In `5s`, the magnetic flux through the ring changes by

A

`0.25mWb`

B

`25mWb`

C

`50mWb`

D

`15mWb`

Text Solution

Verified by Experts

The correct Answer is:
B
`/_\q=(/_\phi)/R`
`or i/_\t=(/_\phi)/R`
`:. /_\phi=i(/_\t)R=(10xx10^-3)(5)(0.5)`
`=25xx10^-3Wb`
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