A charged particle is placed in an electric field that varies with location. No force is exerted on this charge: A) at locations where the electric field is zero B) at locations where the electric field strength is 1/(1.6 * 10^-¹⁹) N/C C) if the particle is moving along a field line D) if the particle is moving perpendicular to a field line E) if the field is caused by an equal amount of positive and negative charge

Question

Quizplus · Accepted Answer

If no force is exerted on the charged particle, then by definition, the electric field must be zero at the location of the particle. This is because the force on a charged particle in an electric field is given by F = qE, where q is the charge of the particle and E is the electric field. So if there is no force, either q = 0 or E = 0. But if q is not zero, then the only way for there to be no force is for E to be zero. Therefore, the correct choice is A.

A Charged Particle Is Placed in an Electric Field That