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Q.

The voltage of clouds is 4  ×  106  V with respect to ground. In a lightning strike lasting 100 ms, a charge of 4 C is delivered to the ground. The power of lightning strike is

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a

20 MW

b

80 MW

c

160 MW

d

500 MW

answer is C.

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Detailed Solution

Work done in delivering q coulomb of charge from clouds to ground.W=Vq=4 ×  106  ×  4=16  ×  106 JThe power of lightning strike isP=Wt = 16 ×  1060.1 = 160 ×  106 W=160  MW
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