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NEET2026PhysicsChapterActual

A plane electromagnetic wave is propagating through free space. If the peak value of the electric field in the wave is E₀ , which of the following expressions correctly represents the peak value of the associated magnetic field B₀ in terms of the permeability ( ₀ ) and permittivity ( ₀ ) of free space?

Options

  1. AE₀ ₀ ₀
  2. BE₀ ₀ ₀
  3. CE₀ ₀ ₀
  4. D₀ ₀ E₀

Correct answer

B. E₀ ₀ ₀

Step-by-step solution

The relationship between the peak electric field E₀ and the peak magnetic field B₀ in an electromagnetic wave propagating in free space is given by: E₀ = c B₀ where c is the speed of light in vacuum. The speed of light is related to the permeability ₀ and permittivity ₀ of free space by the equation: c = 1 ₀ ₀ Substituting the value of c into the first equation: E₀ = B₀ ₀ ₀ Rearranging to solve for B₀ : B₀ = E₀ ₀ ₀ Answer: E₀ ₀ ₀

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