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In FIGURE P32.54, what is the current supplied by the emf when (a) the frequency is very small and (b) the frequency is very large?
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31. Alternating Current
Alternating Voltages and Currents
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Which of the following devices is most likely to operate on alternating current ()?
A
A flashlight
B
A household refrigerator
C
A car battery
D
A solar-powered calculator
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Understand the difference between alternating current (AC) and direct current (DC). AC periodically reverses direction, while DC flows in one direction only.
Identify the typical power sources for each device: a flashlight and a car battery use DC from batteries; a solar-powered calculator uses DC from solar cells.
Recognize that household appliances like refrigerators are usually powered by the electrical grid, which supplies AC.
Recall that most household electrical outlets provide AC voltage, which is suitable for devices like refrigerators.
Conclude that among the options, the household refrigerator is the device most likely to operate on alternating current (AC).
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