If a current of 40 mA flows through a series circuit consisting of a 0.4 �F capa

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Question
If a current of 40 mA flows through a series circuit consisting of a 0.4 µF capacitor and a resistor in series with a 4 kHz, 40 V_ac source, what is the total circuit impedance?
Options
A. 10 Ω
B. 100 Ω
C. 1 k Ω
D. 1 M Ω

Correct Answer

1 k Ω

Capacitors problems

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1. A capacitor's rate of charge is considered:
Options
A. magnetic
B. a current block
C. linear
D. exponential

Discuss

Correct Answer: exponential

2.

What is the reactive power in the given circuit?
Options
A. 0 VAR
B. 691 µVAR
C. 44.23 mVAR
D. 1.45 kVAR

Discuss

Correct Answer: 44.23 mVAR

3. A capacitor is constructed of two parallel:
Options
A. conductors
B. semiconductors
C. inductors
D. dielectrics

Discuss

Correct Answer: conductors

4. Capacitive reactance values connected in series offer
Options
A. an increase in total X_C
B. a decrease in total X_C
C. no change in total X_C
D. total opposition to voltage in the circuit

Discuss

Correct Answer: an increase in total X_C

5. When a 4.7 µF capacitor is connected to a 1 kHz source, what is its capacitive reactance?
Options
A. 4.7 ohms
B. 29.5 ohms
C. 34 ohms
D. 213 ohms

Discuss

Correct Answer: 34 ohms

6. You could increase the time constant of an RC circuit by
Options
A. adding a resistor in parallel with the circuit resistance
B. adding a capacitor in parallel with the circuit capacitance
C. increasing the amplitude of the input voltage
D. exchanging the position of the resistor and capacitor in the circuit

Discuss

Correct Answer: adding a capacitor in parallel with the circuit capacitance

7.

What is the capacitance of the circuit shown in the given circuit?
Options
A. 0.066 µF
B. 0.9 µF
C. 65.97 pF
D. 900 pF

Discuss

Correct Answer: 0.066 µF

8. In an ac circuit, an output capacitor and a resistor are connected in series with an ac signal. What filter action will be the result?
Options
A. bandpass
B. low-pass
C. high-pass
D. band-stop

Discuss

Correct Answer: low-pass

9. In a 20 V_ac series RC circuit, if 20 V is measured across the resistor and 40 V is measured across the capacitor, the applied voltage is:
Options
A. 45 V
B. 50 V
C. 55 V
D. 60 V

Discuss

Correct Answer: 45 V

10. What is the dielectric constant for ceramic?
Options
A. between 6 and 8000
B. 5.0
C. between 5 and 1000
D. 3000

Discuss

Correct Answer: between 6 and 8000

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If a current of 40 mA flows through a series circuit consisting of a 0.4 µF capacitor and a resistor in series with a 4 kHz, 40 Vac source, what is the total circuit impedance?

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If a current of 40 mA flows through a series circuit consisting of a 0.4 µF capacitor and a resistor in series with a 4 kHz, 40 V_ac source, what is the total circuit impedance?