Skip to content

Course home

Sign up

Capacitance (A-level only)

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950
Question 6

Two pressure sensors, A A\,A and BBB, are designed using parallel-plate capacitors with circular plates.

Sensor A A\,A has plates of radius R R\,R separated by a distance ddd, with the gap completely filled by a liquid dielectric of relative permittivity εr\varepsilon_rεr​.

Sensor B B\,B has plates of radius 3R 3R\,3R separated by a distance 4d4d4d, with air as the dielectric.

Both sensors have the exact same baseline capacitance.

What is the relative permittivity εr \varepsilon_r\,εr​ of the liquid dielectric in Sensor AAA?

A

0.750.750.75

B

2.252.252.25

C

9.009.009.00

D

36.036.036.0

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