An electric field exerts a torque on a dipole only if?

برقی میدان صرف ایک ڈوپول پر ٹارک لگاتا ہے؟

The field is parallel to the dipole moment

The field is negative

The field is perpendicular to the dipole moment

The field is positive

An electric field exerts a torque on a dipole only if "the field is perpendicular to the dipole moment."