Punjab Medical Punjab - MET Solved Paper-2007

  • question_answer
    In an electromagnetic wave, the electric and magnetising fields are \[100V{{m}^{-1}}\] and\[0.265A{{m}^{-1}}\]. The maximum energy flow is

    A) \[26.5\,\,W/{{m}^{2}}\]               

    B) \[36.5\,\,W/{{m}^{2}}\]

    C) \[46.7\,\,W/{{m}^{2}}\]               

    D) \[765\,\,W/{{m}^{2}}\]

    Correct Answer: A

    Solution :

    Here, amplitude of electric field, \[{{E}_{0}}=100V/m\]; amplitude of magnetic field,\[{{H}_{0}}=0.265A/m\]. We know that the maximum rate of energy flow,\[S={{E}_{0}}\times {{H}_{0}}=100\times 0.265=26.5W/{{m}^{2}}\]


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