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in Physics by (150k points)

When a charged particle moving with velocity vector v is subjected to magnetic field vector B, the force acting on it is non-zero. Would the particle gain any energy?

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No (i) This is because the charge particle moves on a circular path.

(ii) vector F = q(vector v x vector B) and power dissipated P = vector F x vector v

Since vector v x vector v = 0
So power P = 0 and the particle does not gain any energy.

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