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)

Explanation:

Distance between plates = 0.8 cm

Distance from one plate = 1 mm

Current density (J)= 16 A/m

Currents are flowing in opposite direction.

When current is flowing in opposite direction then magnetic field given as

Now by putting the values we get

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.