A copper disc of radius 1 m is rotated about its natural axis with an angular velocity 2 rad/sec in a uniform magnetic field of 5 tesla with its plane perpendicular to the field. Find the emf induced between the centre of the disc and its rim.

Explanation

`e= (1)/(2) B omega r^(2), e = (1)/(2) xx 5 xx 2 xx 1 xx 1= 5` volt