Discussion
Which component converts alternating current to direct current?
Answer: C
Six diodes in a bridge conduct only in one direction, so the alternating output becomes a rippling direct current. The regulator controls the magnitude by varying field current. Each component has one job. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. The order in which the effects act is what decides the outcome, so it is worth establishing first.
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