A square coil of side 25 cm having 1000 turns is rotated with a uniform speed in a magnetic field about an axis perpendicular to the direction of the field. At an instant t, the emf induced in the coil is `e=200 sin 100pit`. The magnetic induction is

Options

A. A)0.50 T
B. B)0.02 T
C. C)`10^(-3)` T
D. D)0.01 T

Answer

D

Explanation

`e=200sin100pit`
We have
`e_(0)=200, omega=100pi`
`therefore B=(e_(0))/(ANomega)`
`=(200)/((0.25xx0.25)xx1000xx100pi)`
or `B=0.01T`