(a(i))[2]
Fig. 8.1 shows a positively charged cube of insulating material attached to a piece of wood floating on water. A negatively charged rod is kept above the wood and moved close to the cube. State and explain any movement of the piece of wood.
(a(ii))[2]
Fig. 8.2 shows two cubes of insulating material, one positively charged and the other negatively charged, fixed to a piece of wood floating on water. Charged rods are kept above the wood and brought close to the cubes. State and explain any movement of the piece of wood.
(b)[2]
Using a simple electron model, describe how conductors differ from insulators.
(c)[1]
On Fig. 8.3, draw the electric field pattern surrounding a single point positive charge.