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An electron passes undeflected through p...

An electron passes undeflected through perpendicular electric and magnetic filed of intensity `3.4xx10^(3) V//m` and `2xx10^(-3) Wb//m^(2)` respectively . Then its velocity un `m//s` is

A

`1.7xx10^(6)`

B

`6.8xx10^(6)`

C

`6.8`

D

`1.7xx10^(8)`

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The correct Answer is:
A
`V=E/B`
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