Question

A metal ring of radius r = 0.5 m with its plane normal to a uniform magnetic field B of induction 0. 2 T carries a current I = 100 A. The tension in newtons developed in the ring is:

(A) 100 

(B) 50 

(C) 25 

(D) 10

Answer 1

Correct option: (D) 10

Explanation:

We consider a small portion Δl of the loop.

For equilibrium,