Class 12 Physics · Chapter 4 · Test 3
Capacitor Charging and Discharging
37 MCQs
37 questions · 35 min · 37 marks
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Sample questions
The first 5 of 37. Try each one, then tap to see the answer.
Question 1
A circuit containing a resistor and a capacitor is called an:
- ALC circuit
- BRL circuit
- CAC circuit
- DRC circuit
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Answer: D
A resistor-capacitor circuit is called an RC circuit.
Question 2
When a capacitor is charged through a resistor the charge on it:
- ABuilds up gradually
- BReaches its maximum instantly
- CRemains zero
- DDecreases with time
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Answer: A
The capacitor is not charged immediately but charge builds up gradually to its equilibrium value.
Question 3
The equilibrium charge on a capacitor charged by a battery of voltage V0 is:
- Aq0 = V0/C
- Bq0 = C/V0
- Cq0 = C V0
- Dq0 = C²V0
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Answer: C
At equilibrium the capacitor charge is q0 = CV0.
Question 4
The voltage across the capacitor at any instant while charging is:
- AV = qC
- BV = q/C
- CV = C/q
- DV = q²C
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Answer: B
From C = q/V the voltage is V = q/C.
Question 5
At t = 0 when charging starts the charge on the capacitor is:
- ACV0
- BV0/R
- CZero
- DInfinite
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Answer: C
The graph shows q = 0 at t = 0 and it increases gradually.
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