NEET Physics Energy Density MCQ Question
The energy density associated with electric field E̅ and magnetic field B̅ of an electromagnetic wave in free space is given by (ε₀ - permittivity of free space, μ₀ permeability of free space)
Uₑ = E²/2ε₀, Uᵦ = B²/2μ₀
Uₑ = E²/2ε₀, Uᵦ = μ₀B²/2
Uₑ = ε₀E²/2, Uᵦ = μ₀B²/2
Uₑ = ε₀E²/2, Uᵦ = B²/2μ₀
Correct Answer
Detailed Explanation
The energy density of an electric field is given by Uₑ = E²/2ε₀ and for a magnetic field by Uᵦ = B²/2μ₀. These formulas are derived from the electromagnetic wave equations.
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