The phase difference between E(z,t) and H(z,t) vanishes when ___________ Select one:a. some conductivity is observed in the dielectric medium.  b. moisture is present in the atmosphere.c. phase constant is zerod. conductivity is zero.

The phase difference between E(z,t) and H(z,t) vanishes when ___________

In free space E (z,t) = 50 cos(wt -gz) a, (V/m). Find the following.1) Intrinsic impedance of the medium.2) State the direction of the electromagnetic3) Find a magnetic field vector.4) State the poynting vector equation.5) Comment on attenuation constant.

Conduction and displacement current, both densities coexist inSelect one:a. Never coexistb. Conductors placed in any dielectric mediumc. Only conductors in aird. Only dielectrics in air

Conduction and displacement current, both densities coexist inSelect one:a. Never coexistb. Only conductors in airc. Conductors placed in any dielectric mediumd. Only dielectrics in air

For purely resistive components current and voltage are in phase. Group of answer choicesTrueFalse