Technical Mcqs Objective Questions { Capacitors }

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1. In a 20 Vac series RC circuit, if 20 V is measured across the resistor and 40 V is measured across the capacitor, the applied voltage is:

2. Select the equation below that represents the relationship between charge, capacitance, and voltage for a capacitor.

C. https://www.indiabix.com/_files/images/basic-electronics/complete/mca7_1002c1.gif

3. When is a capacitor fully charged?

A. when the voltage across its plates is 1/2 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

4. What is the angle theta value for a 5.6 F capacitor and a 50-ohm resistor in series with a 1.1 kHz, 5 Vac source?

A. 27.3 degrees

B. 62.7 degrees

C. –27.3 degrees

D. –62.7 degrees

5. When a 4.7 F capacitor is connected to a 1 kHz source, what is its capacitive reactance?

6. After which time constant can a capacitor be considered to be fully charged?

7. You could increase the time constant of an RC circuit by

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

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