A charged particle moves along a circle ...

A charged particle moves along a circle under the action of passible constant electric and magnetic fields. Which of the following are possible?

`E=0, B=0`

`E=0, B!=0`

`E!=0, B=0`

`E!=0, B!=0`

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The correct Answer is:

The charged particle has circular path in the case when only magnetic field is present.

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