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A long, narrow beam of electrons, of uni...

A long, narrow beam of electrons, of uniform cross-section consists of electrons moving with velcity `v` (`c=` velocity of light ). The ratio of the electric field to the magnetic field at any point near the beam is

A

`v`

B

`c`

C

`c^(2)//v`

D

`v^(2)//v`

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The correct Answer is:
A
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