Question

A non conducting ring of radius r and mass m having charge q uniformly distributed over its circumference is placed on a rough horizontal surface. A vertical time varying uniform magnetic field b = 4t2 is switched on at time t=0. The coefficient of friction between the ring and the table, if the ring starts rotating at t =2 sec, is :

Answer 1

Answer:

μ=8Rq/mg

Explanation:

Here is your answer if u get the concept then mark this as brainliest