Question

If the torque acting on an electric dipole when placed at an angle \(30^{\circ}\) with the direction of a uniform electric field is \(\tau\), then the torque acting on the same dipole when placed in the same field at an angle \(45^{\circ}\) is

• A. \(2\tau\)
• B. \(\frac{1}{2}\tau\)
• C. \(\frac{1}{\sqrt{2}}\tau\)
• D. \(\sqrt{2}\tau\)
• E. \(\tau\)

Hint:

\(\tau = pE \sin \theta\). Torque is maximum at \(\theta = 90^{\circ}\).

Answer 1

The Correct Option is D