Question

A positively charged particle is free to move in a region with an electric field E. Which statement(s) must be true? (a) The particle is accelerating in the direction perpendicular to E. -Select- (b) The particle is accelerating in the direction of E Select- (c) The particle is moving in the direction of E. Select- (d) The particle is momentarily at rest. ーSelect (e) The force on the particle is opposite the direction of E. Select v (f) The particle is moving opposite the direction of E. Select v eBook

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Answer #1

ANSWER :- (B)

THE PARTICLE IS ACCELERATING IN THE DIRECTION OF E

The force acting on the charge = qE, where, q is the charge and E is the magnitude of electric field.

The direction of the force will be in the direction of electric field if the charge is positive and vice-verse if the charge is negative.

Incase, the particle is moving with an initial velocity, the electric field will provide a constant acceleration (negative or positive depending on the direction of initial velocity). The acceleration = (qE)/m, where m is the mass of the particle.

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