Application: Properties of telephone lines. A two-wire, open-air telephone line is made of round wires, 1mm in radius, and are supported 200 mm apart on insulating cups. The line is made of copper, with conductivity of 5.7 x 107 S/m, and the surrounding space is air (with properties of free space). The line is 3 Ian long and is used to transmit data at 10kHz.
(a) What is the load impedance necessary for matched operation?
(b) If the load requires 0.01 W to operate, how much power must be supplied to the line input?
(c) Suppose you are free to adjust the distance between the lines. Can the line be redesigned to be distortionless? If so, how?