Ham Radio General Class Test Ham Radio General Class Test Electronic Principles and Circuits Questions and Answers 3

Question 1

What is the time constant of a circuit consisting of a 100-microfarad capacitor in series with a 10-kilohm resistor?

Accepted Answer

1 second

Answer

0.1 seconds

Answer

10 seconds

Answer

0.01 seconds

Question 2

What is the function of a coupling capacitor between amplifier stages?

Accepted Answer

To pass AC signals while blocking DC bias voltages

Answer

To filter out high-frequency noise

Answer

To match impedances between stages

Answer

To provide feedback for stability

Question 3

What is the approximate voltage across a forward-biased silicon diode junction?

Accepted Answer

0.7 volts

Answer

0.3 volts

Answer

1.4 volts

Answer

5.0 volts

Question 4

What type of semiconductor component increases its resistance as temperature rises?

Accepted Answer

Positive Temperature Coefficient (PTC) thermistor

Answer

Negative Temperature Coefficient (NTC) thermistor

Answer

Varactor diode

Answer

Zener diode

Question 5

In a common-emitter transistor amplifier, what is the phase relationship between the input and output signals?

Accepted Answer

The output is 180 degrees out of phase with the input

Answer

The output is in phase with the input

Answer

The output leads the input by 90 degrees

Answer

The output lags the input by 45 degrees

Question 6

What determines the resonant frequency of a parallel LC circuit?

Accepted Answer

The values of the inductance and capacitance

Answer

The resistance of the wire in the inductor

Answer

The voltage applied to the circuit

Answer

The current flowing through the circuit