VMMC VMMC Medical Solved Paper-2014

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

    A) \[\text{26}\text{.5W}{{\text{m}}^{\text{-2}}}\]                

    B) \[\text{36}\text{.5W}{{\text{m}}^{\text{-2}}}\]

    C) \[\text{46}\text{.7W}{{\text{m}}^{\text{-2}}}\]                

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

    Correct Answer: A

    Solution :

    Maximum rate of energy flow \[S={{E}_{0}}\times {{H}_{0}}\] Given,\[{{E}_{0}}=100\,V{{m}^{-1}}\] and \[{{H}_{0}}=0.265\,A{{m}^{-1}}\] \[\therefore \]\[S=100\times 0.265=26.5\,W{{m}^{-2}}\]


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