Verified Solution • 2025–26 Session moderate

QJEEM25Phf9dc: JEE Main 2025 Physics - Class 12 JEEM25Phf9dc Solution: A plane electromagnetic wave propagates along the + x direction …

A plane electromagnetic wave propagates along the + x direction in free space. The components of the electric field, E⃗\vec{E} and magnetic field, B⃗\vec{B} vectors associated with the wave in Cartesian frame are

Multiple Choice Options

  • A Ex,ByE_x, B_y
  • B Ey,BxE_y, B_x
  • C Ey,BzE_y, B_z
  • D Ez,ByE_z, B_y

Step-by-Step Verified Solution

We know, for a plane electromagnetic wave,

E^×B^=C^

Given, C^=i^ (+ x direction)

So, E^×B^=i^

JEE Main 2025 (Online) 29th January Evening Shift Physics - Electromagnetic Waves Question 9 English Explanation

i.e. j^×k^=i^

So, E→=Ey

B→=B2

As, i^,j^ and k^ are unit vectors in the directions of x, y and z axes respectively.

Hence, option 3 is correct.

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