A electric dipole is in equilibrium having charge `q` and `-q` are placed at distance `'d'` are placed at distance `'d'` in a uniform electric filed `E`. Each charge has mass `'m'`. If dipole is displaced by small angle. Then its angular frequency of oscillation.

Options

A. `sqrt((q^E)/(2md))`
B. `sqrt((q^E)/(md))`
C. `sqrt((2q^E)/(md))`
D. `2sqrt((q^E)/(md))`

Answer

C

Explanation

`tau=PEsintheta," "Ialpha=q.dEsintheta`
`alpha=(qdE)/(I)sintheta," ""As" theta "is small"" "alpha=(qdE)/(I)theta`
`omega=sqrt((qdE)/(I)),"where",I=2m(d^2)/(4)`