If a conducting coil is rotated on a frictionless axle, then it will rotate without any external couple. Suppose the coil is in a magnetic field and its circuit is not closed.

(a) Will there be potential difference across the coil?

(b)Will there current be induced in the coil?

(c)Will a couple be continuosly required to keep the coil rotating?

(d)What will be the effect on the motion of the coil on closing the circuit?