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Question 2 b) A storm cloud has -25 nC built up in a 1.0 km diameter spheri...
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Question 2 b)
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.
Image failed to load: A storm cloud with a spherical (negative) charge centre of 1km diameter sits 10 km above the ground which has positive signs.
Which of the curves shown below best approximates the shape of an equipotential drawn halfway between the charge centre and the ground?0%
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