Two uncharged conducting spheres, K and L, are placed on insulating stands, with Fig. 5.1 showing a positively charged insulating rod positioned beside K.
(a)[2]
State how the structure of an insulator is different from that of a conductor and name one example of an insulator.
(b(i))[2]
On Fig. 5.1, place the charges on K and on L.
(b(ii).1)[1]
The positively charged rod is taken away. State what happens to the charge on K.
(b(ii).2)[1]
An earthing wire is attached to sphere L. State what happens to the charge on L.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “In an insulator, charges/electrons are not free to move” …