JEE Main & Advanced Physics EM Waves JEE PYQ-Electro Magnetic Waves

  • question_answer
    The magnetic field in a travelling electromagnetic wave has a peak value of 20 \[nT\]. The peak value of electric field strength is:                                             [JEE MAIN 2013]

    A) \[\frac{3V}{m}\]        

    B) \[\frac{6V}{m}\]

    C) \[\frac{9V}{m}\]        

    D) \[\frac{12V}{m}\]

    Correct Answer: B

    Solution :

    [b] \[\frac{{{E}_{o}}}{{{B}_{o}}}=c\] \[\Rightarrow \] \[{{E}_{o}}=c{{B}_{o}}\]
    \[=(20\times {{10}^{-9}}T)3\times {{10}^{8}}\]
    \[=6\text{ }V/m.\]


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