Two charges +q and –q are placed at a distance ‘a’ in a uniform electric field. The dipole moment of the combinationis 2qa (cos θ i^{\^} + sin θ j^{\^}), where θ is the angle between the direction of the field and the line joining the two charges.Which of the following statement(s) is/are correct?

The torque exerted by the field on the dipole vanishes

The net force on the dipole vanishes

The torque is independent of the choice of coordinates

The net force is independent of ‘d’.

WBJEE 2015 Physics Solved Paper

Question : 36 of 40

Marks: +1, -0

Two charges +q and –q are placed at a distance ‘a’ in a uniform electric field. The dipole moment of the combinationis 2qa (cos θ

+ sin θ

), where θ is the angle between the direction of the field and the line joining the two charges.Which of the following statement(s) is/are correct?

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