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A magnetic field of 2xx10^(-2)T acts at ...

A magnetic field of `2xx10^(-2)T` acts at right angles to a coil of area `100cm^(2)` with `50` turns. The average emf induced in the coil is `0.1V`, when it is removed from the field in time `t`. The value of `t` is

A

0.1 sec

B

0.01 sec

C

1 sec

D

20 sec

Text Solution

Verified by Experts

The correct Answer is:
A
`|e|=(NDeltavarphi)/(Deltat)=(NDeltaB*A)/(Deltat)rArrDeltat=(NBA)/|e|`
`rArrDeltat=(50xx2xx10^(-2)xx100xx10^(-4))/0.1=0.1sec.`
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