Consider the imaginary rectangular box shown in Fig. P2.27. A wave traveling in the medium has...

 

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Consider the imaginary rectangular box shown in Fig. P2.27. A wave traveling in the medium has electric and magnetic fields E = x 100e-20y cos(2 x 10t-40y) (V/m), H = -20.64e-20y cos(27 x 10t-40y-36.85) (A/m). The box has dimensions a = 1 cm, b = 2 cm, and c=0.5 cm. Determine: (a) the net time-average power entering the box, (b) the time-average power exiting the box, and (c) the time-average power absorbed by the box. x Figure P2.27: Imaginary rectangular box of Problem 2.27. Consider the imaginary rectangular box shown in Fig. P2.27. A wave traveling in the medium has electric and magnetic fields E = x 100e-20y cos(2 x 10t-40y) (V/m), H = -20.64e-20y cos(27 x 10t-40y-36.85) (A/m). The box has dimensions a = 1 cm, b = 2 cm, and c=0.5 cm. Determine: (a) the net time-average power entering the box, (b) the time-average power exiting the box, and (c) the time-average power absorbed by the box. x Figure P2.27: Imaginary rectangular box of Problem 2.27.

Answer rating: 100% (QA)

To solve for the timeaverage power entering exiting and absorbed by the box one typically uses Poyntings theorem The Poynting vector given by mathbfS mathbfE times mathbfH gives us the power per unit ... View the full answer