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The voltage of clouds is $4 \times 10^6$ volt with respect to ground. In a lightening strike lasting $100 \mathrm{msec}$, a charge of 4 coulombs is delivered to the ground.
The power of the lightening strike is
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The power of the lightening strike is
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$160 \mathrm{MW}$
Work done $=$ charge $\times$ potential difference $W=4 \times\left(4 \times 10^6-0\right)=16 \times 10^6 \mathrm{~J}$.
Power of the lightening strike, $P=\frac{W}{t}$
$$
=\frac{16 \times 10^6}{100 \times 10^{-3}}=160 \mathrm{MW} .
$$
Power of the lightening strike, $P=\frac{W}{t}$
$$
=\frac{16 \times 10^6}{100 \times 10^{-3}}=160 \mathrm{MW} .
$$
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