(a)[2]
On Fig. 5.2, draw the electric field between the two metal plates. Show the direction in which the electric field acts.
(b(i))[1]
Explain, using ideas about charge movement, why the upper layer of sand becomes positively charged.
(b(ii))[1]
State why the upper layer of sand moves towards the sticky paper.
(c)[2]
The potential difference between the hand and the metal is $2000\,\text{V}$ and the transferred charge is $4.0 \times 10^{-4}\,\text{C}$. Calculate the energy transferred when the spark crosses the air gap from the metal to his hand.