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A(n) ____________________ is a device used to generate alternating current at a desired frequency.

Figure 12-4 In the circuit shown in the accompanying figure, timer coil TR1 is connected in ____________________ with the 1M starter coil.

A contactor is a relay that contains ____________________ contacts.

Regardless of the type of photoemissive device used, or the type circuit it is used in, the greatest advantage of the photoemissive device is ____________________.

Figure 22-1 In the accompanying figure, two float switches are necessary in this circuit because the tank is to be ____________________.

____________________ are designed to produce an output voltage that is proportional to the strength of a magnetic field.

Which two taxonomic groups are in the correct sequence to be between Class and Genus?  (T 2)

Circuits that permit the automatic starting of motors in sequence are rare.

Figure 17-11 The accompanying figure is showing a(n) ____________________.

Instantaneous contacts change their positions immediately when the coil is energized and change back to their normal positions immediately when the coil is de-energized.