What will a 1 �F capacitor store? one coulomb of charge 6.24 x 1012 electrons on

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Question
What will a 1 µF capacitor store?
Options
A. one coulomb of charge
B. 6.24 x 10¹² electrons
C. one volt
D. one µA of current

Correct Answer

6.24 x 10¹² electrons

Capacitors problems

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1. What is the impedance of a series RC circuit that consists of a 0.22 µF capacitor and a 200-ohm resistor connected to a 3 kHz source?
Options
A. 214 ohms
B. 313 ohms
C. 414 ohms
D. 880 ohms

Discuss

Correct Answer: 313 ohms

2. A capacitor has 25 V across its plates and a stored charge of 1500 µC. What is the capacitance value?
Options
A. 60 pF
B. 60 µF
C. 16.67 mF
D. 37.5 mF

Discuss

Correct Answer: 60 µF

3. Capacitor value markings are usually:
Options
A. alphanumeric
B. color dabs
C. standard
D. white print

Discuss

Correct Answer: alphanumeric

4. What is the circuit's total current?
Options
A. 4.57 mA
B. 9.327 mA
C. 11.570 mA
D. 13.830 mA

Discuss

Correct Answer: 4.57 mA

5. What is the reactive power?
Options
A. 6.8 mW
B. 9.8 mW
C. 12.8 mW
D. 15.8 mW

Discuss

Correct Answer: 9.8 mW

6. What is the impedance of an ac RC parallel circuit if the resistance is 12 ohms and the capacitive reactance equals 5 ohms?
Options
A. 0.2 ohms
B. 3.5 ohms
C. 4.6 ohms
D. 13 ohms

Discuss

Correct Answer: 4.6 ohms

7. When is a capacitor fully charged?
Options
A. when the voltage across its plates is of the voltage from ground to one of its plates
B. when the current through the capacitor is the same as when the capacitor is discharged
C. when the voltage across the plates is 0.707 of the input voltage
D. when the current through the capacitor is directly proportional to the area of the plates

Discuss

Correct Answer: when the current through the capacitor is the same as when the capacitor is discharged

8. The quantity that represents an ideal capacitor dissipating 0 W of power is
Options
A. instantaneous power
B. true power
C. reactive power
D. resistive power

Discuss

Correct Answer: true power

9. What is this circuit?
Options
A. bandpass filter
B. high-pass filter
C. low-pass filter
D. differentiator

Discuss

Correct Answer: high-pass filter

10. If the dielectric constant of a capacitor is decreased, then its capacitance will:
Options
A. increase
B. decrease
C. remain the same
D. be destroyed

Discuss

Correct Answer: decrease

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