(a)[2]
On Fig. 5.1, draw arrows to show the pattern and direction of the electric field in the space around the sphere.
(b(i))[2]
By drawing on Fig. 5.2, show how charge is distributed on $S$.
(b(ii))[1]
State the motion of $S$.
(b(iii))[2]
Describe what happens in the wire and state how this changes the charge on $S$.
(c)[2]
Explain this difference with reference to the structures of the two materials.