# Question #21d0f

##### 1 Answer

Only possible if velocity of the charged particle is

It is independent of

#### Explanation:

This is a question related to Motion of a Charged Particle in Electric and Magnetic Field. Let us recall the applicable Lorentz Force equation

where

Assumption of direction of three Vectors

Let the charged particle move in the direction given by

Electric field

The direction of the force exerted by the magnetic field is cross product of velocity and magnetic field vectors and is

It is acting in a direction opposite to the electric field vector.

As it is required that the charge should pass through in a straight line, it implies that

Lorentz force must be zero.