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When Can We Talk about Potential Energy

A cloud is at...

Question

A cloud is at a potential of 8×10⁶volt relative to the ground. A charge of 80 coulomb is transferred in lightening stroke between the cloud and the ground. Assuming the potential of the ground to remain constant the energy dissipated is
A)6.4×10⁸Joule
B)6.4×10⁴Joule

C)10⁵Joule

D)10⁷ Joule

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Solution

Energy dissipated = QV
= 80 x 8 x 10⁶ = 6.4 x 10⁸ J

A is correct option.

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