(a)[2]
Explain, in terms of particles, why the rod ends up negatively charged.
(b(i))[1]
State the definition of an electric field.
(b(ii))[2]
On Fig. 7.1, draw the electric-field pattern around sphere S and show its direction.
(c)[1]
On Fig. 7.2, draw an arrow to indicate the direction of this force on Z.