For ten points, identify this physical quantity, the rotational analog of force.
For an electric dipole, it equals polarization times electric field. In mechanics, it's equal to power over two pi times rotational velocity and it vanishes when the position vector and the force vector are parallel or in the case of constant angular speed. Along with energy, it has units of newton- meters, but the two are not the same thing. For ten points, identify this physical quantity, the rotational analog of force.
For an electric dipole, it equals polarization times electric field.
{torque}