a homogenous copper disk of mass m and radius r is placed in a mag netic field of induction B so that field is perpendicular the plane of disk.a wire is now passed through the centre of disc.

.now when the circuit is completed with d.c source connected,the disk begins to rotate and in t seconds aqires a velocity of n rotations per second.

the current in the circuit is-

Navjyot Kalra , 11 Years ago

Grade 10