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JEE Main & Advanced Physics EM Waves Question Bank Self Evaluation Test - Electromagnetic Waves

  • question_answer
    The electric field component of a monochromatic radiation is given by \[\vec{E}=2{{E}_{0}}\,\,\hat{i}\,\,\cos \,\,kz\,\cos \omega t\] Its magnetic field B is then given by:

    A) \[\frac{2{{E}_{o}}}{c}\hat{j}\,\sin \,kz\,\cos \,\omega t\]

    B) \[-\frac{2{{E}_{o}}}{c}\hat{j}\,\sin \,kz\,\sin \,\omega t\]

    C) \[\frac{2{{E}_{o}}}{c}\hat{j}\,\sin \,kz\,\sin \,\omega t\]

    D) \[\frac{2{{E}_{o}}}{c}\hat{j}\,\cos \,kz\,\cos \,\omega t\]

    Correct Answer: C

    Solution :

    [c] Magnetic field vector, \[\vec{B}=\frac{2{{E}_{0}}}{c}\hat{j}\sin kz\sin \omega t\]


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