A plane electromagnetic wave of frequency $50\, MHz$ travels in free space along the positive $x-$ direction. At a particular point in space and time, $\vec E = 6.3\,\hat j\,V/m$ . The corresponding magnetic field $\vec B$, at that point will be

  • [JEE MAIN 2019]
  • A

    $18.9 \times {10^{ - 8}}\,\hat kT$

  • B

    $2.1 \times {10^{ - 8}}\,\hat kT$

  • C

    $6.3 \times {10^{ - 8}}\,\hat kT$

  • D

    $18.9 \times {10^{ 8}}\,\hat kT$

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