The term 'excitation' in alternator operation refers to current in which circuit?

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Multiple Choice

The term 'excitation' in alternator operation refers to current in which circuit?

Explanation:
Excitation is the DC current that energizes the rotor’s magnetic field. It flows in the rotor field circuit (through brushes and slip rings to the field windings) and is separate from the generator’s output circuit. This steady DC field creates the magnetic flux the stator windings cut as the rotor spins, producing AC electricity. The excitation circuit is controlled by the regulator to maintain a stable output voltage. Hydraulic and pneumatic circuits do not play a role, and the AC circuit is the generated power, not the excitation.

Excitation is the DC current that energizes the rotor’s magnetic field. It flows in the rotor field circuit (through brushes and slip rings to the field windings) and is separate from the generator’s output circuit. This steady DC field creates the magnetic flux the stator windings cut as the rotor spins, producing AC electricity. The excitation circuit is controlled by the regulator to maintain a stable output voltage. Hydraulic and pneumatic circuits do not play a role, and the AC circuit is the generated power, not the excitation.

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