text: The "spin-transfer" type of this quantity can be used to change the polarization of a thin layer of magnetic material.
full_question: The "spin-transfer" type of this quantity can be used to change the polarization of a thin layer of magnetic material. This quantity governs a device in which this quantity is equal to negative kappa times theta, and Poinsot's construction can be used to predict solutions to an equation which relates this quantity to omega and the inertia matrix. For a magnetic (*) dipole in a magnetic field, this quantity is equal to the cross product of the dipole moment and the electric field. This quantity can be computed as the derivative of angular momentum or the cross product of force and the lever arm. For ten points, name this quantity denoted tau, the rotational analogue of force which causes objects to rotate.
first_sentence: The "spin-transfer" type of this quantity can be used to change the polarization of a thin layer of magnetic material.