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In a certain region of space electric fi...

In a certain region of space electric field E and magnetic field B are perpendicular ot each other and an electron enters region perpendicular to the direction of B and E both and moves undeflected, then velocity of electron is

A

`(|E|)/(|B|)`

B

`ExxB`

C

`(|B|)/(|E|)`

D

`E.B`

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A
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