Example The magnetic field component of a TEM uniform plane

Example: The magnetic field component of a TEM uniform plane wave in a dielectric material ( given by B = y -3 × 10-3x) 0) is 2.5 cos(7 × 10% a. Determine the phase velocity of the wave in terms of c.

Solution

a.)The magnetic field component is

B=a_y2.5 cos(7*10⁵t-3*10^-3x) micro tesla

comapring with B=A cos(wt-x)

   where A ------->amplitude

   =3*10^-3

   ^{w=7*10^5}

^{The phase velocity is}   

V=/

V=7*10⁵/(3*10^-3)

V=233.3*10⁶*10^-6

V=233.3   m/s