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CAIE A-Level Physics A2 18.5 Electric Potential Questions

Practise calculating electric potential and potential energy for point charges, using potential gradients for field strength and relating signs to work and energy.

Syllabus
2028–2030
Course
Physics 9702
Level
A2

Exam points

  • define and calculate electric potential and point-charge potential, including sign and reference
  • use potential gradient to determine electric field strength and direction
  • calculate electric potential energy of two point charges and relate it to work and energy changes

Covered syllabus points

18.5.1—Electric potential at a point as the work done per unit positive charge in18.5.2—The fact that the electric field at a point is equal to the negative of18.5.3—V = Q / (4πε0 r) for the electric potential in the field due to a point18.5.4—The concept of electric potential leads to the electric potential energy of

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