FCC Question Pool Review

Amateur Extra Class (Element 4) • 2024-2028

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Question E6C07

From subelement E6 - E6C

E6C07
Answer: B

What best describes a pull-up or pull-down resistor?

AA resistor in a keying circuit used to reduce key clicks
BA resistor connected to the positive or negative supply used to establish a voltage when an input or output is an open circuit
CA resistor that ensures that an oscillator frequency does not drift
DA resistor connected to an op-amp output that prevents signals from exceeding the power supply voltage