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18 Electric fields
18.1 Electric fields and field lines
Candidates should be able to:
1 understand that an electric field is an example of a field of force and define electric field as force per
unit positive charge
2 recall and use F = qE for the force on a charge in an electric field
3 represent an electric field by means of field lines
18.2 Uniform electric fields
Candidates should be able to:
1 recall and use E = ∆V/∆d to calculate the field strength of the uniform field between charged parallel
plates
2 describe the effect of a uniform electric field on the motion of charged particles
Cambridge International AS & A Level Physics 9702 syllabus for 2025, 2026 and 2027. Subject content
Back to contents page www.cambridgeinternational.org/alevel 31
18.3 Electric force between point charges
Candidates should be able to:
1 understand that, for a point outside a spherica
