Question

Formula for the torque in stable equlibrium with explaination

Answer 1

• The torque on the dipole is zero, i.e., there is no rotatory motion of dipole.

• The resultant force on dipole is zero, i.e., there is no translatory motion of dipole.

• The potential energy of dipole is minimum.

It will be so when dipole is aligned along the direction of electric field.

The dipole will be in unstable equilibrium if :

• The torque on the dipole is zero.

• The resultant force on dipole is zero.

• The potential energy of dipole is maximum.