Ham Radio General Class Test Ham Radio General Class Test Electronic Principles and Circuits Questions and Answers 2

Question 1

What is the total resistance of three 300-ohm resistors connected in parallel?

Accepted Answer

100 ohms

Answer

Parallel resistance of equal resistors equals the value of one resistor divided by the number of resistors: 300/3 = 100 ohms.

Question 2

What type of filter is used to pass frequencies above a specified cutoff frequency while attenuating frequencies below it?

Accepted Answer

High-pass filter

Answer

A high-pass filter allows signals above the cutoff frequency to pass and attenuates lower frequencies.

Question 3

What is the purpose of a bypass capacitor in an amplifier circuit?

Accepted Answer

To provide a low-impedance path to ground for AC signals

Answer

A bypass capacitor shunts unwanted AC signals to ground, preventing them from affecting the circuit's bias point.

Question 4

In a series RLC circuit at resonance, what is the relationship between inductive reactance and capacitive reactance?

Accepted Answer

They are equal and cancel each other

Answer

At resonance, inductive reactance equals capacitive reactance, and they cancel, leaving only the resistance in the circuit.

Question 5

What happens to the capacitance of a capacitor if the plate area is doubled while keeping the plate spacing constant?

Accepted Answer

Capacitance doubles

Answer

Capacitance is directly proportional to plate area, so doubling the area doubles the capacitance.

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