Question:
a lightning flash carries a charge of 5 c that flows for 5 milliseconds.calculate the current and the energy if the voltage is 12MV
Answer:
Electric current I= Q/t
So, I= 5/5×10-3
t= 5 millisecond= 5×10-3 second
I= 1000 amp
Electric energy= VIt
V= voltage, 12 MV = 12×106 V
So, energy= 1000×12×106 ×5×10-3
= 60×106 J
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