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A charge q , and mass m , is fired perpe...

A charge q , and mass m , is fired perpendicular to a magnetic field (B) with a velocity v . The frequency of revolution of the charge is

A

`2 pi` /Bq

B

`2pi` Bq/m

C

`2 pi m` /Bq

D

Bq/`2pi m`

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The correct Answer is:
D
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