NEETPhysicsElectrostatics
Match the configurations of an electric dipole in List-I with their corresponding mechanical states in List-II. List-I List-II (A) Dipole parallel to a unidirectional non-uniform electric field (I) Net force is zero, torque is zero, stable equilibrium (B) Dipole antiparallel to a unidirectional non-uniform electric field (II) Net force is non-zero, torque is zero, stable equilibrium (C) Dipole perpendicular to a unif
Options
- A(A)-(II), (B)-(IV), (C)-(I), (D)-(III)
- B(A)-(IV), (B)-(II), (C)-(III), (D)-(I)
- C(A)-(I), (B)-(III), (C)-(II), (D)-(IV)
- D(A)-(II), (B)-(IV), (C)-(III), (D)-(I)
Correct answer
D. (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
Step-by-step solution
In a uniform electric field, the net force on a dipole is always zero. If the dipole is parallel to the field ( = 0^ ), the torque is zero and it is in stable equilibrium. If it is perpendicular ( = 90^ ), the torque is maximum and non-zero. In a non-uniform electric field, the net force is generally non-zero. If the dipole is parallel to the field ( = 0^ ), the torque is zero and it is in stable equilibrium. If it is antiparallel ( = 180^ ), the torque is zero and it is in unstable equilibrium. Matching these cond