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A plane electromagnetic wave travels in free space along the x – direction. The electric field component of the wave at a particular point of space and time is E = Vm⁻¹along y – direction. Its corresponding magnetic filed component, B would be: (A) 2 × 10⁻⁸ T along z- direction(B) 6 × 10⁻⁸ T along x- direction(C) 6 × 10⁻⁸ T along z- direction(D) 2 × 10⁻⁸ along y- direction |
Answer» The CORRESPONDING magnetic filed COMPONENT, B WOULD be B = 2 x 10^6-8 T ALONG z direction.Option (A) is correct.Explanation: The direction of propogation of an EM wave is direction of E × B . i^ = j^ × B^ B^ = k^ C = E / B => B = E / C = 6 / 3 x 10^8 B = 2 x 10^6-8 T along z direction. Thus the corresponding magnetic filed component, B would be B = 2 x 10^6-8 T along z direction.
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