Question

If net force is zero on a particle in magnetic field what is relation between velocity and magnetic field?

(a) v=E*B

(b) v=E/B

(c) v=B/E

(d) v=1/(E*B)

I got this question in examination.

This is a very interesting question from Force Determination in chapter Electromagnetism of Basic Electrical Engineering

Answer 1

Right choice is (b) v=E/B

Explanation: Since net force is zero on the particle.

Electric force = Magnetic force

QE = QvB => E=vB or v=E/B.