Key Topic 20: Capacitors

Question 1

3-20C1: What factors determine the capacitance of a capacitor?

A. Voltage on the plates and distance between the plates.
B. Voltage on the plates and the dielectric constant of the material between the plates.
C. Amount of charge on the plates and the dielectric constant of the material between the plates.
D. Distance between the plates and the dielectric constant of the material between the plates.

Answer 1

D. Distance between the plates and the dielectric constant of the material between the plates.

Question 2

3-20C2: In Figure 3C4, if a small variable capacitor were installed in place of the dashed line, it would?

A. Increase gain.
B. Increase parasitic oscillations.
C. Decrease parasitic oscillations.
D. Decrease crosstalk.

Answer 2

C. Decrease parasitic oscillations.

Question 3

3-20C3: In Figure 3C4, which component (labeled 1 through 4) is used to provide a signal ground?

A. 1
B. 2
C. 3
D. 4

Answer 3

B. 2

Question 4

3-20C4: In Figure 3C5, which capacitor (labeled 1 through 4) is being used as a bypass capacitor?

A. 1
B. 2
C. 3
D. 4

Answer 4

C. 3

Question 5

3-20C5: In Figure 3C5, the 1 µF capacitor is connected to a potentiometer that is used to:

A. Increase gain.
B. Neutralize amplifier.
C. Couple.
D. Adjust tone.

Answer 5

D. Adjust tone.

Question 6

3-20C6: What is the purpose of a coupling capacitor?

A. It blocks direct current and passes alternating current.
B. It blocks alternating current and passes direct current.
C. It increases the resonant frequency of the circuit.
D. It decreases the resonant frequency of the circuit.

Answer 6

A. It blocks direct current and passes alternating current.