A charged particle moves through space with constant velocity (magnitude and dir

Question

A charged particle moves through space with constant velocity (magnitude and direction). If the external magentic field is zero in this region, you can conclude that the external electric field in this region is also zero.

In a different scenario, if the external E-field is zero, can you conclude that the external B-field is also zero? Explain in 100 words or less.

* In both cases, consider that there are no other fields or forces other than possible electric and magnetic forces. Ignore the E and B fields created by the moving charged particle as these fields do not affect the particle that created them

Explanation / Answer

Yes in the first case we can conclude electric field is zero, if there exists a net electric field it will always try to accelerate a charge particle as a force of qE where q is charge of the body and E is electric field acts on the particle. But when E is zero we cannot conclude that B is zero, since When B is parallel to the direction of velocity of the moving particle as the body is moving in the same direction, net force of B on the particle is zero. A parallel B field to the velocity can exist.

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