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JEE Main202311 Apr 2023Evening ShiftPhysicsElectromagnetic WavesActual

A plane electromagnetic wave of frequency 20 MHz propagates in free space along x -direction. At a particular space and time E → = 6 . 6 j ^ V m - 1 . What is B → at this point?

Options

  1. A2 . 2 × 10 - 8 k ^ T
  2. B- 2 . 2 × 10 - 8 i ^ T
  3. C- 2 . 2 × 10 - 8 k ^ T
  4. D2 . 2 × 10 - 8 i   ^ T

Correct answer

A. 2 . 2 × 10 - 8 k ^ T

Step-by-step solution

It is given that E → = 6 . 6 j ^ (   V   m - 1 ) . The relation between the electric, magnetic field and speed of light is E → × B → = c → . Clearly, B → = B 0 ( k ^ ) Using the relation, c B 0 = E ⇒ B 0 = E c = 6 . 6 3 × 10 8 = 2 . 2 × 10 - 8   T

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