Question

An electric dipole is formed due to two particles fixed at the ends of a light rigid rod od length I. The mass of each particle is m and charges are -q and +q The system is suspended by a torsionless thread in an electric filed of intensity E such that the dipole axis is parallel to the filed if it is slightly displaced, the period of angular motion is

• A. $\frac{1}{2\pi }\sqrt{\frac{2qe}{ml}}$
• B. $2\pi \sqrt{\frac{ml}{qE}}$
• C. $2\pi \sqrt{\frac{ml}{2qE}}$
• D. $\frac{1}{2\pi }\sqrt{\frac{ml}{4qE}}$

Answer 1

The correct option is C $2\pi \sqrt{\frac{ml}{2qE}}$