Question

If the radius of an orbit is $r$ and the velocity of electron in it is $v$, then the frequency of electron in the orbit will be

• A. $2\pi rv$
• B. $\frac{2\pi }{vr}$
• C. $\frac{vr}{2\pi }$
• D. $\frac{v}{2\pi r}$

Answer 1

Answer: (D)

$v=2\pi rf$
$\Rightarrow f=\frac{v}{2\pi r}$