At a Particular Point and Instant,the $\vec { E }$ Field Component of an Electromagnetic Wave Is 15

question 33

Multiple Choice

At a particular point and instant,the $\vec { E }$ field component of an electromagnetic wave is 15.0 μT.What is the magnetic energy density of this wave at that point and instant? (c = 3.00 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A,ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A)2.26 × 10^-4 J/m³
• B)8.95 × 10^-5 J/m³
• C)1.79 × 10^-4 J/m³
• D)4.47 × 10^-4 J/m³
• E)9.72 × 10^-5 J/m³

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