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. `u=(nh)/(8pi^(2)msqrt(km))`
B. `u=(n^(2)h)/(8pi^(2)msqrt(km))`
C. `u=(nh^(2))/(4pi^(2)msqrt(km))`
D. `u=(n^(2)h^(2))/(8pi^(2)msqrt(km))`

Answer

d