A technician uses the same small positively charged calibration sphere to map an electric field. The sphere is held at R and then at S.
| Position | Direction of force on sphere | Size of force |
|---|---|---|
| R | upwards | 0.40 mN |
| S | upwards | 0.90 mN |
Which describes the electric field?
The field lines point upwards and are closer together at S.
The field lines point upwards and are equally spaced at R and S.
The field lines point upwards and are closer together at R.
The field lines point downwards and are closer together at S.
80 exam-style questions on Edexcel GCSE Physics 11.2 Uses, dangers and electric fields, covering 11.2.1 Uses of electrostatic charge, 11.2.2 Dangers of sparking, 11.2.3 Electric fields, and 11.2.4 Electric fields and static electricity. Each one has a worked solution and a mark scheme showing where the marks go.