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Electric fields (A-level only)

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Question 32

Two small, charged lipid vesicles in an aqueous suspension carry charges q1 q_1\,q1​ and q2 q_2\,q2​ and are separated by a distance rrr. The electrostatic force of repulsion between them is FFF.

Due to a change in the pH of the medium, the charge on the first vesicle is doubled, the charge on the second vesicle is tripled, and their separation distance increases by 50%.

What is the magnitude of the new electrostatic force between the vesicles in terms of FFF?

A

43F\frac{4}{3}F34​F

B

89F\frac{8}{9}F98​F

C

4F4F4F

D

83F\frac{8}{3}F38​F

Markscheme

Electric fields (A-level only) Questions

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

48 exam-style questions on AQA A Level Physics Electric fields (A-level only), covering Coulomb's law (A-level only), Electric field strength (A-level only), and Electric potential (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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