An uncharged conducting metal plate is supported on insulating stands. Fig. 10.1 shows the plate with a positively charged insulating plastic sheet resting on it.
(a(i))[1]
Describe any movement of charge that occurs when the plastic sheet is placed on the metal plate.
(a(ii))[1]
On Fig. 10.1, sketch the new charge arrangement inside the metal plate.
(a(iii))[2]
State and explain whether this charge arrangement helps to keep the plastic sheet in place.
(b(1))[1]
On Fig. 10.2, sketch a possible position for each sphere and thread.
(b(2))[2]
Explain the positions that you have drawn.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Negative charges, namely electrons, move upwards (owtte)” …