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Two charges + andy are placed at a dista...

Two charges + andy are placed at a distance 'o' in a uniform electric field. The dipole moment of the combination is `2qa(cos theta hat(i) + sin theta hat(j))` where `theta` 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?

A

The torque exerted by the field on the dipole vanishes.

B

The net force on the dipole vanishes.

C

The torque is independent of the choice of coordinates.

D

The net force is independent of'd'.

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