Which of the following statements is/are NOT true for the damper windings in alternators?

I)These are useful in preventing the hunting in alternators.

II) Usually, damper windings are provided in smooth cylindrical type rotor alternators.

III) Under normal working conditions, i.e., if machine is at synchronous speed, damper winding do not carry any currents.

IV) Damper windings are also used to provide starting torque in alternators.