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JEE Main 2023 (13 Apr, Shift 2) · Nature of EM Waves & Wave Equation

Nature of EM Waves & Wave Equation question from JEE Main 2023 (13 Apr, Shift 2)

Q21JEE Main 2023 · 13 APR · SHIFT 2Easy

Nature of EM Waves & Wave Equation

In an electromagnetic wave, at an instant and at particular position, the electric field is along the negative zz-axis and magnetic field is along the positive xx-axis. Then the direction of propagation of electromagnetic wave is:

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Answer: (c)

  1. Propagation is along E⃗×B⃗\vec{E}\times\vec{B}.
  2. (−k^)×i^=−(k^×i^)=−j^(-\hat{k})\times\hat{i} = -(\hat{k}\times\hat{i}) = -\hat{j}.
  3. So the answer is (c) negative y-axis.
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