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PhysicsJEE Main 21 Jan 2026, Shift 1·Q10·MCQ·Easy–moderate

Electromagnetic Waves · EM waves

The electric field of a plane electromagnetic wave is given by: Ey=69sin⁡[0.6×103x−1.8×1011t] V/m.E_y = 69\sin[0.6\times10^{3}x - 1.8\times10^{11}t]\ \mathrm{V/m}. The expression for magnetic field associated with this electromagnetic wave is T.
  1. (1)Bz=2.3×10−7sin⁡[0.6×103x−1.8×1011t]B_z = 2.3\times10^{-7}\sin[0.6\times10^{3}x - 1.8\times10^{11}t]
  2. (2)Bz=2.3×10−7sin⁡[0.6×103x+1.8×1011t]B_z = 2.3\times10^{-7}\sin[0.6\times10^{3}x + 1.8\times10^{11}t]
  3. (3)By=69sin⁡[0.6×103x+1.8×1011t]B_y = 69\sin[0.6\times10^{3}x + 1.8\times10^{11}t]
  4. (4)By=2.3×10−7sin⁡[0.6×103x−1.8×1011t]B_y = 2.3\times10^{-7}\sin[0.6\times10^{3}x - 1.8\times10^{11}t]
We corrected a printing error in the original paper

Source printed “The electric field a plane electromagnetic wave”.

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