(a)[2]
Describe how charge moves in an electric circuit, referring to the particles involved and the terminals of the battery.
(b)[5]
(i) Calculate the current between the cloud and the ground. (ii) During the lightning flash, the potential difference (p.d.) between the cloud and the ground is $2.5 \times 10^{8}\,\text{V}$. Calculate the energy transferred in the flash. (iii) Suggest what happens to the energy you calculated in (b)(ii).