A piece of cloud has area 25×106m2 and electric potential of 105 volts. If the height of cloud is 0.75 km , then energy of electric field between earth and cloud will be?
A
250 J
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B
750 J
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C
1225 J
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D
1475 J
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Solution
The correct option is D 1475 J Energy = 12ϵ0E2×(A×d)=12ϵ0(V2d2)Ad =12×8.85×10−12×(105)2×25×1060.75×103=1475J