Two charged spheres are held a fixed distance apart on insulating stands. Which change would make the force between the two spheres larger?
Moving one of the two spheres further away from the other
Replacing one sphere with an uncharged sphere of that size
Turning both of the insulating stands through a right angle
Moving one of the two spheres closer towards the other one
40 exam-style questions on AQA GCSE Physics 2.5 Static electricity, covering 2.5.1 Static charge and 2.5.2 Electric fields. Each one has a worked solution and a mark scheme showing where the marks go.