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Electronics
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Capacitors
Comments
Question
What is the total current for a 5 MHz, 1 V
ac
circuit that consists of a 27 pF capacitor and a 1 kΩ resistor connected in parallel?
Options
A. 459 µA
B. 647 µA
C. 1.31 mA
D. 1.85 mA
Correct Answer
1.31 mA
Capacitors problems
Search Results
1. If the reactive power of a circuit is 50 mW while the apparent power is 64 mW, then what is the true power of the circuit?
Options
A. 14 mW
B. 36 mW
C. 40 mW
D. 114 mW
Show Answer
Scratch Pad
Discuss
Correct Answer: 40 mW
2. What is the dielectric constant for ceramic?
Options
A. between 6 and 8000
B. 5.0
C. between 5 and 1000
D. 3000
Show Answer
Scratch Pad
Discuss
Correct Answer: between 6 and 8000
3. 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
Show Answer
Scratch Pad
Discuss
Correct Answer: 45 V
4. 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
Show Answer
Scratch Pad
Discuss
Correct Answer: low-pass
5.
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
Show Answer
Scratch Pad
Discuss
Correct Answer: 0.066 µF
6. What is the voltage across the capacitor?
Options
A. 7.07 V
B. 1.11 V
C. 111 mV
D. 7.07 mV
Show Answer
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Discuss
Correct Answer: 111 mV
7. As a capacitor is being charged, the voltage across its terminals will:
Options
A. increase
B. decrease
C. remain the same
D. oppose the source
Show Answer
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Discuss
Correct Answer: increase
8. What is the reactance value for a capacitor installed in a dc circuit?
Options
A. zero
B. moderate
C. infinite
D. cannot tell
Show Answer
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Discuss
Correct Answer: infinite
9. What is the total capacitance?
Options
A. 1 F
B. 12 F
C. 0.615 F
D. 8 F
Show Answer
Scratch Pad
Discuss
Correct Answer: 12 F
10. Which material has the highest dielectric strength?
Options
A. Air
B. Paper
C. Mica
D. Oil
Show Answer
Scratch Pad
Discuss
Correct Answer: Mica
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