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Fields and their consequences (A-level only)

Fields and their consequences (A-level only)

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Question 22

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

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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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