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NEET Sample Paper NEET Sample Test Paper-71

  • question_answer
    The voltage of clouds is \[4 \times  1{{0}^{6}}V\] 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. \[W=Vq\] \[=4\times 1{{0}^{6}}\times 4\] \[-\,16\,\,\times \,\,{{10}^{6}}\,J\] The power of lightning strike is \[P=\frac{W}{t}=\frac{16\times {{10}^{6}}}{0.1}=160\times {{10}^{6}}\,W\] \[=\,\,160\,\,MW\]


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