The direct current that is an input to the alternator's rotor is the _____ current.

A) excitation
B) starting
C) synchronizing
D) initiating

Excitation Current

The current supplied to the field winding of a generator or motor to create the necessary magnetic field for operation.

Direct Current

An electric current that flows consistently in one direction, typical of battery power or certain types of power supplies.

Alternator's Rotor

The rotating component within an alternator that produces the magnetic field, essential for generating electricity in an automotive charging system.