Electromagnetic Waves

JEE Main level, single correct, medium

80 of 165

Question 80 of 165

In an electromagnetic wave, the electric field vector and magnetic field vector are given as E⃗=E0i^\vec{E}={E}_{0}\hat{i} and B⃗=B0k^\vec{B}={B}_{0}\hat{k}, respectively. The direction of
propagation of electromagnetic wave is along:

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Answer: (D) (−j^)(-\hat{j})

Direction of propagation =E⃗×B⃗=i^×k^=−j^=\vec{E}\times \vec{B}=\hat{i}\times \hat{k}=-\hat{j}.

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