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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 `100 cm^(2)`, with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from the field in t sec. The value of t is

A

10 s

B

0.1 s

C

0.01 s

D

1 s

Text Solution

Verified by Experts

The correct Answer is:
B
Induced e.m.f, `epsilon =(-(phi_(2)-phi_(1)))/(t)=(-(0-NBA))/(t)=(NBA)/(t)`
`t=(NBA)/(epsilon)=(50xx2xx10^(-2)xx10^(-2))/(0.1)=0.1 s`
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