JEE PYQ: Electromagnetic Waves Question 5
Question 5 - 2021 (18 Mar 2021 Shift 2)
A plane electromagnetic wave propagating along y-direction can have the following pair of electric field ($\vec{E}$) and magnetic field ($\vec{B}$) components:
(1) $E_y, B_y$ or $E_z, B_z$
(2) $E_y, B_x$ or $E_x, B_y$
(3) $E_x, B_z$ or $E_z, B_x$
(4) $E_x, B_y$ or $E_y, B_x$
Show Answer
Answer: (3)
Solution
$\vec{E}$ and $\vec{B}$ must be perpendicular to each other and to the direction of propagation (y). Valid pairs are $E_x, B_z$ or $E_z, B_x$.
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