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Fields and their consequences (A-level only)

Fields and their consequences (A-level only)

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Question 20

A high-voltage capacitor in a pulsed-laser system has capacitance C C\,C and is initially charged to a potential difference VVV. During a rapid discharge cycle, the charge on the plates is reduced to 14\displaystyle \frac{1}{4}41​ of its initial value while the capacitance remains constant. What is the decrease in the electrical energy stored by the capacitor?

A

132CV2\frac{1}{32} C V^2321​CV2

B

38CV2\frac{3}{8} C V^283​CV2

C

1532CV2\frac{15}{32} C V^23215​CV2

D

1516CV2\frac{15}{16} C V^21615​CV2

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Fields and their consequences (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Fields and their consequences (A-level only)

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