A charge particle moves along a circle under the action of possible electric and magnetic field​

The correct answer is - B ≠ 0, E = 0.

Explanation:

A force q E is exerted by the electric field on the charged particle that accelerates always, that is, it increases the speed of the particle. The particle can never be rotated in a rotation in the circle in an electric field.

The magnitude of the velocity cannot be changed by the magnetic field but changes only the velocity of the direction.

If the particle moves in a circle it means that the speed should begin for a year. The only direct velocity is constant and only the change be b can be achieved. So, B ≠ 0 and E = 0.

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