Potential difference/charges question!!?
The potential difference between a storm cloud and the ground is 100 million volts. If a charge of 18 C flashes in a bolt from cloud to Earth, what is the change of potential energy of the charge?
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Verified answer
E = ½CV² Energy in a cap
Q = CV, C = Q/V
E = ½(Q/V)V²
E = ½QV = ½*18*100e6 = 900e6 J or 900 MJ
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