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Alternators of small kilovolt-ampere rating are generally _____-cooled.

If one alternator does not produce sufficient power to supply a load, another alternator can be connected to the circuit. The second alternator is connected in _____.

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

Power is carried to the outside circuit of a revolving armature type alternator via brushes riding against the _____.

_______________ alternators have a fan attached to one end of the shaft.

A three-phase alternator containing six poles is turning at 1000 RPM. What is the output frequency?

What is one factor that controls the output frequency of an alternator?

A(n) _____ is used to measure the difference in voltage and frequency between two alternators.

The higher power output alternators use a revolving _____.

What machines operate on the same principle of electromagnetic induction as DC generators, but they have no commutator?