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JEE Main & Advanced Physics EM Waves Question Bank Mock Test - Electromagnetic Waves and Dual Nature

  • question_answer
    In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of \[2.5\times {{10}^{10}}Hz\] and amplitude 480 V/m. The amplitude of the oscillating magnetic field will be

    A) \[1.52\times {{10}^{-8}}Wb/{{m}^{2}}\]        

    B) \[1.52\times {{10}^{-7}}Wb/{{m}^{2}}\]

    C) \[1.6\times {{10}^{-6}}Wb/{{m}^{2}}\]

    D) \[1.6\times {{10}^{-7}}Wb/{{m}^{2}}\]

    Correct Answer: C

    Solution :

    [c] \[c=\frac{{{E}_{0}}}{{{B}_{0}}}\] \[\therefore {{B}_{0}}=\frac{{{E}_{0}}}{c}=1.6\times {{10}^{-6}}Wb/{{m}^{2}}\]   


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