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Class 12 Physics Practice Test: AC Voltage Applied to a Capacitor
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Class 12 Physics Practice Test: AC Voltage Applied to a Capacitor
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10 Questions

1. A 1.50 μF capacitor is connected to a 220 V, 50 Hz source. If the frequency is doubled, what happens to the capacitive reactance?
2. A capacitor of capacitance 10 μF is connected to an oscillator giving an output voltage, E = 10 sin ωt volt. If ω = 10 rad s-1, find the peak current in the circuit.
3. Which among the following is the correct expression for finding capacitive reactance for an ac circuit containing capacitor only?
4. How will the capacitive reactance be affected if the frequency is doubled?
5. A 1.5 μF capacitor is connected to a 220 V, 50 Hz source. Find the capacitive reactance in the circuit.
6. The capacitive reactance varies directly with the frequency.
7. What is the capacitive reactance of a 5 μF capacitor when it is a part of a circuit whose frequency is 50 Hz?
8. What will be the reactance of a capacitor at 150 Hz, if it has a reactance of 200 Ω at 50 Hz?
9. Give the SI unit of capacitive reactance.
10. Calculate the rms value of current in the circuit wherein an 80 μF capacitor is connected to a 100 V, 80 Hz ac supply.

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