The Following Section consists of Multiple Choice Questions on Capacitors.
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Capacitors MCQ
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Question 1 of 7
1. Question
1 pointsA capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
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Question 2 of 7
2. Question
1 pointsWhich of the following capacitors is polarized?
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Question 3 of 7
3. Question
1 pointsA sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current
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Question 4 of 7
4. Question
1 pointsOf the following capacitors, which one has the highest dielectric constant?
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Question 5 of 7
5. Question
1 pointsA 330 pF capacitor and a 220 pF capacitor are each connected across a 6 V dc source. The voltage across the 330 pF capacitor is
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Question 6 of 7
6. Question
1 pointsWhen the plate area of a capacitor increases,
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Question 7 of 7
7. Question
1 pointsWhen the voltage across a capacitor is tripled, the stored charge
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Capacitors MCQ 2
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Question 1 of 20
1. Question
1 pointsIn 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:
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Question 2 of 20
2. Question
1 pointsWhen is a capacitor fully charged?
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Question 3 of 20
3. Question
1 pointsAfter which time constant can a capacitor be considered to be fully charged?
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Question 4 of 20
4. Question
1 pointsYou could increase the time constant of an RC circuit by
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Question 5 of 20
5. Question
1 pointsA capacitor’s rate of charge is considered:
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Question 6 of 20
6. Question
1 pointsA resistor and an output capacitor form a series circuit with a square wave applied. The circuit is:
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Question 7 of 20
7. Question
1 pointsIf an open capacitor is checked with an ohmmeter, the needle will:
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Question 8 of 20
8. Question
1 pointsAs a capacitor is being charged, current flowing into the capacitor will:
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Question 9 of 20
9. Question
1 pointsA capacitor stores energy within a dielectric between the conducting plates in the form of:
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Question 10 of 20
10. Question
1 pointsAs a capacitor is being charged, the voltage across its terminals will:
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Question 11 of 20
11. Question
1 pointsAfter a capacitor has charged for 1 tc, what percentage of current remains in the resistor?
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Question 12 of 20
12. Question
1 pointsIn an ac circuit, an output capacitor and a resistor are connected in series with an ac signal. What filter action will be the result?
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Question 13 of 20
13. Question
1 pointsWhat is the total opposition to current in a series RC circuit called?
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Question 14 of 20
14. Question
1 pointsWhich of the following statements is true?
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Question 15 of 20
15. Question
1 pointsIn a capacitive circuit, current flow is limited to
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Question 16 of 20
16. Question
1 pointsA capacitor is constructed of two parallel:
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Question 17 of 20
17. Question
1 pointsWhich of the following determines the capacitance of a capacitor?
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Question 18 of 20
18. Question
1 pointsMost older types of paper capacitors have been replaced by which type of construction?
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Question 19 of 20
19. Question
1 pointsWhat is the reactance value for a capacitor installed in a dc circuit?
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Question 20 of 20
20. Question
1 pointsIn a purely capacitive circuit,
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Capacitors MCQ 3
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Question 1 of 20
1. Question
1 pointsWhat is wrong with a leaky capacitor?
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Question 2 of 20
2. Question
1 pointsWhat is the value of a capacitor labeled 102?
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Question 3 of 20
3. Question
1 pointsIf the dielectric constant of a capacitor is decreased, then its capacitance will:
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Question 4 of 20
4. Question
1 pointsWhat is the dielectric constant for ceramic?
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Question 5 of 20
5. Question
1 pointsWhat is the voltage across a capacitor after being charged from a 100 V source for a period of one time constant?
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Question 6 of 20
6. Question
1 pointsPower stored from the source and then returned to the source is called:
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Question 7 of 20
7. Question
1 pointsCapacitor value markings are usually:
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Question 8 of 20
8. Question
1 pointsA source voltage across a capacitor will:
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Question 9 of 20
9. Question
1 pointsAn 8 V power source is charging a capacitor. How many volts will be across the capacitor at the second time constant?
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Question 10 of 20
10. Question
1 pointsThe material used between the plates of a capacitor is called its:
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Question 11 of 20
11. Question
1 pointsWhen a circuit consists of a capacitor and a resistor in series with a voltage source, and the voltage across the resistor is zero, then the capacitor is:
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Question 12 of 20
12. Question
1 pointsWhich material has the highest dielectric strength?
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Question 13 of 20
13. Question
1 pointsIn an ac circuit, a capacitor and an output resistor are connected in series with an ac signal. What filter action will be the result?
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Question 14 of 20
14. Question
1 pointsA practical capacitor
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Question 15 of 20
15. Question
1 pointsWhich of the following is the reference vector for parallel RC circuits?
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Question 16 of 20
16. Question
1 pointsWhat do variable capacitors use for dielectric?
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Question 17 of 20
17. Question
1 pointsIf a charged capacitor is disconnected from a circuit, it will:
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Question 18 of 20
18. Question
1 pointsThe strength of an electric field at a given point is proportional to the potential difference on the plates and inversely proportional to the:
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Question 19 of 20
19. Question
1 pointsHow is ac current related to ac voltage in a purely capacitive circuit?
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Question 20 of 20
20. Question
1 pointsFor a given charge difference, electrostatic field strength varies according to:
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Capacitors MCQ 4
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Question 1 of 7
1. Question
1 pointsA capacitor and an output resistor form a series circuit with a square wave applied. The circuit is:
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Question 2 of 7
2. Question
1 pointsCapacitive reactance values connected in series offer
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Question 3 of 7
3. Question
1 pointsThe quantity that represents an ideal capacitor dissipating 0 W of power is
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Question 4 of 7
4. Question
1 pointsIf a capacitor is placed across a 20 V source, what will be the amount of charge after 5 tc?
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Question 5 of 7
5. Question
1 pointsWhat is the impedance of an ac RC parallel circuit if the resistance is 12 ohms and the capacitive reactance equals 5 ohms?
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Question 6 of 7
6. Question
1 pointsWhat is the power factor if the apparent power of a circuit is 5 W, while the true power is 4 W?
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Question 7 of 7
7. Question
1 pointsIf 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?
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