(On request - Kylie)
Q- The potential difference between a storm cloud and the ground is 100 million volts. A charge of 2 coulomb flashes in a lightning bolt from cloud to earth. How much current is in the lightning flash, if it lasted for 0.1 second?
Solution:
The current is the rate of flow of electric charge and thus given by
I = ΔQ/Δt
The charge flowing is ΔQ = 2 C
In time interval Δt = 0.1 s
Thus the average current in the lightning will be ΔQ/Δt = 2/0.1 = 20 A
(Here the potential difference given is additional quantity given)
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