The Rate of Energy Flow Per Unit Area of a Sinusoidal

question 14

Multiple Choice

The rate of energy flow per unit area of a sinusoidal electromagnetic wave has an average value of $0.601 \mathrm {~W} / \mathrm { m } ^ { 2 }$ . What is the maximum value of the magnetic field in the wave? $\left( c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , \mu _ { 0 } \right.$ $= 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } , \varepsilon _ { 0 } = 8.85 \times 10 ^ { - 12 } \mathrm { C } ^ { 2 } / \mathrm { N } \cdot \mathrm { m } ^ { 2 }$ )

• A) \(7.09 \times 10 ^ { - 8 } \mathrm {~T}\)
• B) \(9.81 \times 10 ^ { - 8 } \mathrm {~T}\)
• C) \(5.02 \times 10 ^ { - 8 } \mathrm {~T}\)
• D) \(3.55 \times 10 ^ { - 8 } \mathrm {~T}\)
• E) \(1.42 \times 10 ^ { - 7 } \mathrm {~T}\)

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