2. Sample Papers
  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-25

  • question_answer
    An electromagnetic wave is propagating along x- axis. At \[x=1\] cm and \[t=10\] s, its electric vector \[\left| E \right|=6V/m\], then the magnitude of its magnetic vector is:

    A)  \[2\times {{10}^{-8}}\]                       

    B)  \[3\times {{10}^{-7}}\]

    C)  \[6\times {{10}^{-8}}\]                       

    D)  \[5\times {{10}^{-7}}\]

    Correct Answer: A

    Solution :

    As we know that, d\[\frac{E}{B}=c\] So, \[B=\frac{E}{c}=\frac{6}{3\times {{10}^{8}}}\,=2\times {{10}^{-8}}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner