JEE Advanced 2020 Full Test 7 Paper 2

A circular loop of radius R is bent along a diameter and given a shape as shown in the figure. One of the semicircles (KNM) lies in the x−z plane and the other one (KLM) in the y−z plane with their centres at the origin. Current I is flowing through each of the semi circles as shown in figure. A particle of charge q is released at the origin with a velocity

→

v

=v0

∧

i

Find the magnitude of instantaneous force

→

F

on the particle if µ0qv0l=8R. Assume that space is gravity free.