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Nature of EM Waves & Wave Equation question from JEE Main 2013

Q81JEE Main 2013Easy

Nature of EM Waves & Wave Equation

The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT20\text{ nT}. The peak value of electric field strength is:

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Answer: (b)

  1. E0=cB0E_0 = cB_0
  2. E0=3×108×20×10−9=6 V/mE_0 = 3\times10^{8}\times20\times10^{-9} = 6\text{ V/m}
  3. So the answer is (b) 66 V/m.
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