NEET 2003 Physics question

A charged particle moves through a magnetic field in a direction perpendicular to it. Then the

(1)Speed of the particle remains unchangedCorrect
(2)Direction of the particle remains unchanged
(3)Acceleration remains unchanged
(4)Velocity remains unchanged

Answer: (1)

Solution

The magnetic force is always perpendicular to the velocity, so it does no work and cannot change the kinetic energy. Hence the speed remains constant, option (1). The force continuously changes the

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Question ID VK-089161