Skip to content

Course home

Sign up

Capacitance (A-level only)

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950
Question 4

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

Markscheme

Capacitance (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Capacitance (A-level only)

63 exam-style questions on AQA A Level Physics Capacitance (A-level only), covering Capacitance (A-level only), Parallel plate capacitor (A-level only), Energy stored by a capacitor (A-level only), and Capacitor charge and discharge (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

Question bank