An alternator containing eight poles per phase is turning at 900 RPM. What is the output frequency?

The direction of magnetic field rotation is known as _____ rotation.

In order to increase the efficiency of the cooling, some alternators operate in a(n) _____ atmosphere.

The rotating part of a revolving-armature-type alternator is called the _____.

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?