Alightning flash may transfer up to 14 c of charge through a potential difference of 107 v

how much energy does this involve?
for how long in minutes does this energy light a 100 w bulb?

Energy involved = 1498 J

Time taken by this energy to light a 100 W bulb = 0·25 min

Explanation:

Charge that is transferred = 14 C

Potential difference = 107 V

Formula for power in terms of potential difference (V) and current (I) = V × I

Current (I) = (charge transferred) ÷ (time taken)

∴ Energy involved = 107 × 14 = 1498 J

Given power of the bulb = 100 W

Energy ÷ (time taken) = 100

1498 ÷ (time taken) = 100

∴ Time taken = 14·98 s = 14·98 ÷ 60 min = 0·25 min

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