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

`(e)/sqrt(4pimepsilon_(0)r)`

B

`(2e)/sqrt(pimepsilon_(0)r)`

C

`(e)/sqrt(pimepsilon_(0)r)`

D

`(e)/sqrt(4pimepsilon_(0)r)`

Verified by Experts

The correct Answer is:

A

`(mv^(2))/r=1/(4piin_(0)) xx e^(2)/r^(2)`
`v = e/sqrt(4piin_(0)rm)`

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