A proton has both mass and a positive charge. It produces both a gravitational field and an electric field in the space around it. Which statement is not correct?
Both fields have a radial pattern of field lines.
Both field strengths obey an inverse-square law with distance from the proton.
The direction of both fields at any point is radially inwards towards the proton.
The lines representing both fields are non-parallel.
15 exam-style questions on OCR A A Level Physics Electric fields, covering Point and spherical charges, Coulomb's law, Uniform electric field, and Electric potential and energy. Each one has a worked solution and a mark scheme showing where the marks go.