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JEE Main202122 Jul 2021Morning ShiftPhysicsElectromagnetic WavesActual

Intensity of sunlight is observed as 0 . 092 Wm - 2 at a point in free space. What will be the peak value of magnetic field at that point ? ε 0 = 8 . 85 × 10 - 12 C 2 N - 1 m - 2

Options

  1. A2 . 77 × 10 - 8   T
  2. B1 . 96 × 10 - 8   T
  3. C8 . 31   T
  4. D5 . 88   T

Correct answer

A. 2 . 77 × 10 - 8   T

Step-by-step solution

I avg   = B 0 2 C 2 μ 0 & 1 μ 0 = ϵ 0 C 2 I = B 0 2 2 ϵ 0 C 3   B 0 = 2 I ϵ 0 C 3   B 0 = 2 . 77 × 10 - 8   T

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