Answer :

(a) We do not get an electric shock as we step out of our house because the original equipotential surfaces of open air changes, and our body being a good conductor suitably comes in equipotential with the earth surface.

(b) Yes, the man will get an electric shock if he comes in contact with the metal slab next morning. The steady discharging current in the atmosphere charges up the aluminium sheet. As a result a substantial potential is built gradually. The raise in the voltage depends on the capacitance of the capacitor formed by the aluminium slab and the ground.

(c) The occurrence of thunderstorms and lightning charges the atmosphere continuously. So, during lightning even with the presence of a discharging current of 1800 A, the atmosphere is not discharged completely. The two opposing currents are in equilibrium and the atmosphere remains neutralized.

(d) During lightning and thunderstorm, heat energy, light energy and sound energy are dissipated in the atmosphere.

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