A 800 turn coil of effective area `0.05 m^(2)` is kept perpendicular to a magnetic field `5xx10^(-5)` T. When the plane of the coil is rotated by `90^(@)` around any of its coplanar axis in 0.1 s, the emf induced in the coil will be:

Options

A. `0.012 V`
B. `0.05 V`
C. ``0.1 V`
D. `0.2 V`

Answer

D

Explanation

`e=(-NBA(costheta_(2)-costheta_(1))/(Deltat)`
`=-(500x4xx10^(-4)xx0.1(cos90-cos0))/(0.1)=0.2V`