Fig. 8.1 shows two plastic spheres that are initially uncharged (neutral). An insulating thread supports each sphere.
(a)[1]
State a material that could be used for the insulating threads.
(b)[3]
For every experiment, state the force, if there is one, acting between the spheres.
experiment 1
experiment 2
experiment 3
(c)[2]
State and explain how one of the plastic spheres can be given a positive charge.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “any correctly named insulator, for example cotton, string, etc.” …