Question

The electric field of a uniform plane 7.11 propagating wave in free space is given by (V/m) E — (* + ј9)30е јл:/6 Specify the modulus and direction of the electric field intensity at the z 0 plane at t0, 5, and 10 ns 7.18 Dry sol is characterized by e 2.5, r = 1, and 104 (S/m) determine if dry soil may be considered a good conductor quasi-conductor, or a low-loss dielectric, and then calculate a В, А, мр, аnd ne: At each of the following frequencies, (а) 60 Hz (b) 1 kHz (c) 1 MHz (d) 1 GHz

Answer 1

Sol E(2t T2 30e = + 30 cos (wt-m2/6 ) + 4 30 coS (wt-Tz/e+끼2) ocos (ut-)-930 sim (at-평) (vim) 티= \E Ey'. 30 212 u2.42v 후ㅋ tan 띠e3지108 = 2.5x1 H2 2ㅠ w- 2T = 5 T * 10' Tad/s at t o at ot: -5T* 10t Sus -0-ST-q at t l0ns -0-2ST-usat 2EE. 6 OHZ at >}2%10">> (Goo여 comdu ctos) d) ansi = Tfu su adlm) 2.45KI (14) - 우 \kH2 at = 120 ( 0od conductor) 6.28 xIoNpim

O at Cquasi-coductor) 2 Npim 2 3.ugx 10 am 2. ^ 20 4. 28 tjes.89 cielectoic) ((ow-oSs 7-2 I0 GHZ 9x2 pm 2. ad/m 33.14 2 T up - 23 8.22 J