FCC Question Pool Review

Amateur Extra Class (Element 4) • 2024-2028

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Question E4E05

From subelement E4 - E4E

E4E05
Answer: B

What is used to suppress radio frequency interference from a line-driven AC motor?

AA high-pass filter in series with the motor’s power leads
BA brute-force AC-line filter in series with the motor’s power leads
CA bypass capacitor in series with the motor’s field winding
DA bypass choke in parallel with the motor’s field winding