The voltage of clouds is $4 \times 10^6\,volt$ with respect to round. In a lighteing strike lasting $100\,m\,sec$, a charge of $4\,coulombs$ is delivered to the ground. The power of lightening strike is
AIIMS 2006, Medium
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Energy delivered to the ground $=\mathrm{V} . \mathrm{Q}$
$=4 \times 10^{6} \times 4=16 \times 10^{6}\,joule$
Power $=\frac{16 \times 10^{6}}{\text { time }}=\frac{16 \times 10^{6}}{100 \times 10^{-3}}=16 \times 10^{7}$
$=160 \,\mathrm{MW}$
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