FCC Question Pool Review

Amateur Extra Class (Element 4) • 2024-2028

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Question E6F08

From subelement E6 - E6F

E6F08
Answer: C

Why are optoisolators often used in conjunction with solid-state circuits that control 120 VAC circuits?

AOptoisolators provide a low-impedance link between a control circuit and a power circuit
BOptoisolators provide impedance matching between the control circuit and power circuit
COptoisolators provide an electrical isolation between a control circuit and the circuit being switched
DOptoisolators eliminate the effects of reflected light in the control circuit