Question

Two electric dipoles of dipole moments \(3.9 \times 10^{-30}\,\text{C m}\) and \(5.2 \times 10^{-30}\,\text{C m}\) are placed in two different uniform electric fields of strengths \(16 \times 10^{4}\,\text{N C}^{-1}\) and \(4 \times 10^{4}\,\text{N C}^{-1}\) respectively. What is the ratio of maximum torque experienced by the electric dipoles?

• A. \(12:1\)
• B. \(9:1\)
• C. \(1:9\)
• D. \(3:1\)

Hint:

Maximum torque on an electric dipole is \(\tau_{\max} = pE\). For ratios, multiply dipole moment and electric field strength for each case.

Answer 1

The Correct Option is D