NCERT Exercise 1.10 - Electric Charges and Fields
Question: An electric dipole with dipole moment 4 × 10⁻⁹ C m is aligned at 30° with the direction of a uniform electric field of magnitude 5 × 10⁴ NC⁻¹. Calculate the magnitude of the torque acting on the dipole.
Answer: The magnitude of torque acting on the dipole = **τ = 10⁻⁴ N·m = 1 × 10⁻⁴ N·m**. The torque acts to align the dipole moment p along the direction of the electric field E.
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