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Capacitance (A-level only)

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Question 23

A parallel-plate capacitor containing a dielectric slab of relative permittivity εr=6.0\varepsilon_r = 6.0εr​=6.0 is connected to a constant voltage source. The energy stored in the capacitor is EEE.

The capacitor is then disconnected from the voltage source, and the dielectric slab is completely removed. Additionally, the separation between the plates is halved.

What is the energy now stored in the capacitor?

A

13E\frac{1}{3}E31​E

B

1.5E1.5E1.5E

C

3E3E3E

D

12E12E12E

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.

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