The voltage of clouds is 4 × 10^6 volt with respect to ground. In a lightening strike lasting 100 msec , a charge of 4 coulombs is delivered to the ground. The power of the lightening strike is

Correct answer: A. 160 MW Work done = charge × potential difference W=4 ×(4 × 10^6-0)=16 × 10^6 ~J . Power of the lightening strike, P=(W)/(t)= 16 × 10^6 100 × 10^ -3 = 160 MW .

AIIMS 2006

Exam: AIIMS
Year: 2006
Subject: Physics
Chapter: Current Electricity

AIIMS 2006 · Physics · Current Electricity

The voltage of clouds is 4 × 10^6 volt with respect to ground. In a...

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

Options

A $160 \mathrm{MW}$
B $80 \mathrm{MW}$
C $20 \mathrm{MW}$
D $500 \mathrm{MW}$ .

Correct answer

A. $160 \mathrm{MW}$

Step-by-step solution

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} .

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