Capacitance and energy stored Quiz
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5 questions, one answer each
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1. A 100 μF capacitor is charged to 20 V. What charge is stored?
- A. 2.0 × 10⁻³ C
- B. 5.0 × 10⁻⁶ C
- C. 0.20 C
- D. 2.0 C
2. Which expression is NOT equal to the energy stored in a capacitor?
- A. ½QV
- B. ½CV²
- C. Q²/2C
- D. QV
3. A 50 μF capacitor is charged to 12 V. What energy does it store?
- A. 7.2 × 10⁻³ J
- B. 3.6 × 10⁻³ J
- C. 0.60 J
- D. 6.0 × 10⁻⁴ J
4. The potential difference across a capacitor is tripled. By what factor does the energy stored increase?
- A. 3
- B. 6
- C. 9
- D. 27
5. What is the gradient of a graph of charge stored against potential difference for a capacitor?
- A. The energy stored
- B. The reciprocal of the capacitance
- C. The capacitance
- D. The time constant