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Desciption of Force

A charged par...

Question

A charged particle goes undeflected in a region containing electric and magnetic fields. It is possible that

A

\to E ∥ \to B, \to v ∥ \to E

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B

\to E

is parallel to

\to B

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C

\to v ∥ \to E

also

\to E

is not parallel to

\to B

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D

\to E ∥ \to B

but

\to v

is not parallel to

\to E

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Solution

The correct option is C $\to v ∥ \to E$ also $\to E$ is not parallel to $\to B$
If the magnetic force on the particle is zero, a charged particle goes undeflected in a region containing electric and magnetic fields and $\to v ∥ \to E$ . Also, $\to E$ is not parallel to $\to B$ .

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