4- The electric field of a plane wave propagating in a nonmagnetic medium with
\epsi _(r)=9 and \sigma =2 is given by
vec(E)(x,t)=vec(e_(z))25e^(-ax)cos(2\pi 10^(7)t-\beta x)
a- Determine if the material is low-loss dielectric or good conductor.
b- Find the values of phase constant (\beta ), attenuation constant (a), intrinsic impedance
(\eta ), phase velocity (v_(p)), skin depth \delta , group velocity (v_(g)).
c- Find the phasor form of electric and magnetic field.
d- Find the time domain expression of magnetic field.
e- Find the poynting vector of plane wave.
f - Find the average power density of propagating wave.