Question

Why does a charged particle moving at right angle to the direction of magnetic field follow a circular path ?

Answer 1

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Explanation.

Because when the charged particles move at right angle to the direction of magnetic field, it experiences force which always acts perpendicular to the velocity. Hence, the magnitude of its velocity remains constant and only the direction of velocity of the charged particles changes. In other words, the force on the charged particle act as centripetal force and it follows a circular path.

Answer 2

Answer:

Magnetic force can cause a charged particle to move in a circular or spiral path.

Magnetic force is always perpendicular to velocity, so that it does no work on the charged particle. The particle’s kinetic energy and speed thus remain constant. The direction of motion is affected, but not the speed.