In an atom, two electrons move around nucleus in circular orbits of radii ( R) and ( 4R) . The ratio of the time taken by them to complete one revolution is :

Options

A. `1:4`
B. `4:1`
C. `8:1`
D. `1:8`

Answer

d

Explanation

`(T_(1))/(T_(2))=((r_(1))/(r_(2)))^(3//2)=((r)/(4r))^(3//2)=(1)/(8).`