Let us assume a different atomic model in which electron revolves around the nucleus (proton) at a separation r under the action of force which is different from electro-static force of attraction. The potential energy between an electron and the proton due to this force is given by `U=-k/(r^(4))` where k is a constant.
Find the radius of n th Bohr's orbit.

Options

A. `r=pi/(nh)sqrt(km)`
B. `r=(2pi)/(nh)sqrt(km)`
C. `r=(4pi)/(nh)sqrt(km)`
D. `r=(8pi)/(nh)sqrt(km)`

Answer

c