2.27 Consider the imaginary rectangular box shown in Fig. P2.27. A wave traveling in the medium has electric and magnetic fields E = 100e -20y cos (27 x 10°t - 40y) (V/m), H = -20.64e-20y cos(2 x 10°t-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. Figure P2.27: Imaginary rectangular box of Problem 2.27.

Fig: 1