A storm cloud has -25 nC built up in a 1.0 km diameter spherical charge centre...
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A storm cloud has -25 nC built up in a 1.0 km diameter spherical charge centre located 10 km above the ground. This charge centre attracts a similar amount of positive charge that is spread on the ground below the ground. The charge centre and ground act as a charged capacitor, with a potential difference of V. In a lightning strike, the large electric field between these two charged regions (acting as electrodes) may ionise the air resulting in a conducting path between the cloud and ground, through which the 'capacitor' discharges.
Calculate the approximate capacitance of the charge centre + ground system.
Give your answer to 0 decimal places in nF. Write your answer without units i.e., 12 nF as 12.
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