What is the key difference between alternating current (AC) and direct current (DC)?
AAC periodically reverses direction, while DC flows in only one direction
BAC only exists in batteries, while DC only exists in power lines
CAC and DC are simply two names for the same type of current
DAC flows in only one direction, while DC periodically reverses direction
Explanation
Alternating current, or AC, periodically reverses direction, typically supplied to homes through the electrical grid, while direct current, or DC, flows steadily in a single direction, as provided by batteries and solar cells. Household outlets in most countries supply AC power because it can be transmitted efficiently over long distances at high voltages. Many electronic devices, however, internally convert incoming AC power into DC power to operate their circuits. Explore more Everyday Science MCQs on mcqstutor to keep practicing.
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