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If epsilon(0) be the permittivity of vac...

If `epsilon_(0)` be the permittivity of vacuum and r be the radius of orbit of H- atom in which electron is revolving, then velocity of electron is given by :

A

`v=(e)/(sqrt(4piepsilon_(0)rm)`

B

`v=exxsqrt(4piepsilon_(0)rm)`

C

`v=(4piepsilon_(0)rm)/(e)`

D

`v=(4piepsilon_(0)rm)/(e^(2))`

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