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.
1-19
IT0348
Previous Page
