OnlineCBT
Physics · Electrostatic Potential
हिन्दीConsider the following statements about an electric dipole placed in a uniform electric field \( \mathbf{E} \): (A) The net force acting on the dipole is zero. (B) The net torque acting on the dipole is maximum when its dipole moment is parallel to \( \mathbf{E} \). (C) The potential energy is zero when the dipole moment is perpendicular to \( \mathbf{E} \) (taking potential energy to be zero at \( \(\theta\) = \(\pi\)/2 \)). (D) The potential energy is maximum when the dipole moment is antiparallel to \( \mathbf{E} \). Choose the correct answer from the options given below:
Correct answer · Option 4
(A), (C) and (D) only
Explanation
In uniform field: F_net = 0 (A is true). Torque tau = p E sin(theta) is zero when parallel, not maximum (B is false). U(90°) = 0 (C is true). U(180°) = +pE is maximum (D is true).
