Question

A charge is moving in a magnetic field that points to the left. What direction can the charge move and experience no magnetic force?

Answer 1

Explanation:

The magnetic force acting on a charged particle when placed in a magnetic field is given by :

$F=q(v\times B)$

$F=qvB\sin \theta$

$\theta$ is the angle between v and B.

If means that if the angle between v and B is 0 degrees or both are acting in same direction, then magnetic force is equal to 0.

Here, a charge is moving in a magnetic field that points to the left. Hence, for a charge particle that experiences no magnetic force, the charge must move in the left direction such that they move parallel to each other.