Question

An electric dipole is formed by two
equal and opposite charge q with
separation d, the charges have same
mass m. It is kept in a uniform
electric field E. If it is slightly
rotated from its equilibrium
orientation, then its angular
frequency w is​

Answer 1

we know T = PEsin©

now T = PE© for samll angle

now I@ = PE© hence

@ = PE©/I similar to w²©

hence w = square root of pe/I