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AIIMS AIIMS Solved Paper-2006

  • question_answer
    The voltage of clouds is \[4\times {{10}^{6}}V\] 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:

    A) 160 MW              

    B)       80 MW 

    C)       20 MW                 

    D)       500 kW

    Correct Answer: A

    Solution :

    Work done in delivering q coulomb of charge from clouds to ground. \[W=Vq\] \[=4\times {{10}^{6}}\times 4\] \[=16\times {{10}^{6}}J\] The power of lightning strike is \[P=\frac{W}{t}=\frac{16\times {{10}^{6}}}{0.1}=160\times {{10}^{6}}W\] \[=160MW\]


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