Which of the following properties of a proton | vedclass

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(D) When a proton moves in a magnetic field,it experiences a magnetic force given by $F = q(v 	imes B)$.This force acts perpendicular to the directio

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velocity and momentum

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(D) When a proton moves in a magnetic field,it experiences a magnetic force given by $F = q(v 	imes B)$.This force acts perpendicular to the direction of motion,which causes the proton to follow a circular path.Since the direction of motion changes continuously in a circular path,the velocity of the proton changes.Because momentum is defined as $p = mv$ and velocity changes,the momentum also changes.However,the speed (magnitude of velocity) and mass remain constant because the magnetic force does no work on the particle.

Which of the following properties of a proton can change while it moves freely in a magnetic field?

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