The quantity that represents an ideal capacitor dissipating 0 W of power is inst

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Question
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

Correct Answer

true power

Capacitors problems

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1. 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

2. 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

3. 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

Discuss

Correct Answer: 6.24 x 10¹² electrons

4. 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

5. 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

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

Discuss

Correct Answer: high-pass filter

7. 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

8. In an ac circuit, a capacitor and an output 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: high-pass

9. In an RC circuit, true power (P_R) equals:
Options
A.
B. V_S � I
C. I²R
D. V_T � R_T

Discuss

Correct Answer: I²R

10. If an open capacitor is checked with an ohmmeter, the needle will:
Options
A. stay on zero
B. stay on infinity
C. move from zero to infinity
D. move from infinity to zero

Discuss

Correct Answer: stay on infinity

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The quantity that represents an ideal capacitor dissipating 0 W of power is

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