18A

YOUR ANSWER: P = E x I.

This is correct. P = E x I.

A resistor is an example of a device whose limit is given directly in watts. it may be

used in circuits with widely different voltages, depending on the desired current. However, the

resistor has a maximum current limitation for each voltage applied to it. The product of the

resistor's voltage and current must not exceed a certain wattage.

Thus, resistors are rated in watts, in addition to their ohmic resistance value. Resistors

of the same resistance value are available in different wattage values. Carbon resistors, for

example, are commonly made in wattage ratings of 1/3, 1/2, 1, and 2 watts. The larger the

physical size of a carbon resistor, the higher its wattage rating, since a larger amount of

material will absorb and give up heat more easily.

Resistors are rated in

watts.

frame 15A

ohms.

frame 13B

both the above.

frame 11B

18B

Here are the correct answers.

a. 67.8 percent

b. 3300_ watts.

c. 4.42 horsepower.

If your answers do not agree, turn to frame 23A for correct solution.

If your answers do agree, turn to frame 25A and continue.

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IT0348

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