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JEE Main202118 Mar 2021Morning ShiftPhysicsElectromagnetic WavesActual

A plane electromagnetic wave of frequency 100 MHz is traveling in a vacuum along the x - direction. At a particular point in space and time, B → = 2 . 0 × 10 - 8 k ^ T · (where, k ^ is unit vector along z - direction) What is E → at this point?

Options

  1. A0 . 6 j ^   V   m - 1
  2. B6 . 0 k ^   V   m - 1
  3. C6 . 0 j ^   V   m - 1
  4. D0 . 6 k ^   V   m - 1

Correct answer

C. 6 . 0 j ^   V   m - 1

Step-by-step solution

E = B C = 6 . (Direction of the wave) ‖ ( E → × B → ) ⇒ i ^ = j ^ × k ^ ⇒ E → = 6 j ^   V   m - 1

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