When a charged particle of charge a revolves in a circular orbit of radius r with frequency n, then orbital current will be

Options

A. `(ev)/(pir^(2))`
B. `(ev)/(4pir)`
C. `(ev)/(2pir)`
D. `(ev)/(4pir^(2))`

Answer

C

Explanation

If a charged particle of charge q revolves in a circular orbit of radius r with frequency v, then the orbital current is given by
`l=qv`
or `l=q(omega)/(2pi)" "(becauseomega=2piv implies v=(omega)/(2pi))`
`l=(ev)/(2pir)" "(becausev=romega)`