1.27 In a certain region of space, the electric field is along the z-direction throughout. The magnitude of the electric field is, however, not constant but increases uniformly along the positive z-direction, at the rate of per meter. What are the force and torques experienced by a system having a total dipole moment equal to Cm in the negative z-direction?
The dipole moment of the system,
Rate of increase of electric field per unit length,
Force (F) experienced by the system is given by the relation,
The force is N in the negative z-direction i.e., opposite to the direction of the electric field. Hence, the angle between the electric field and the dipole moment is 180°. Torque () is given by the relation,T =pE sin 180° = 0
Therefore, the torque experienced by the system is zero.
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