Atype of transmission line for electromagnetic waves consists of two parallel conducting plates (assumed infinite in width) separated by a distance a. each plate carries the same uniform surface current density of 16.0 a/m, but the currents run in opposite directions. what is the magnitude of the magnetic field between the plates at a point 1.00 mm from one of the plates if a = 0.800 cm? (μ0 = 4π × 10-7 t · m/a)