defence exam Navy SSR (Medical) Mock Test Series 2025 Physics Moving Charges and Magnetism Motion in a Magnetic Field
An electric dipole of mass m, charge q, and length l is placed in a uniform electric field \(\vec{\mathrm{E}}=\mathrm{E}_{0} \hat{\mathrm{i}}\). When the dipole is rotated slightly from its equilibrium position and released, the time period of its oscillations will be :
1
\(\rm \frac{1}{2 \pi} \sqrt{\frac{2 \mathrm{m} l}{\mathrm{qE}_{0}}} \)
2
\(\rm 2 \pi \sqrt{\frac{\mathrm{m} l}{\mathrm{qE}_{0}}} \)
3
\(\rm \frac{1}{2 \pi} \sqrt{\frac{\mathrm{m} l}{2 \mathrm{qE}_{0}}} \)
4
\(\rm 2 \pi \sqrt{\frac{\mathrm{m} l}{2 \mathrm{qE}_{0}}}\)