Question

a telephone line has r=30ohm/km l=150mh/km g=0 c=20 microf/km the characteristic impedance of line b) the propogation ​

Answer 1

Answer:

Q1

Copper and aluminum are being considered for a

a high-voltage transmission line that must carry a current of 60.0 A.

The resistance per unit length is to be 0.1500/km. The densities of

copper and aluminum are 8960 and 2600kg/m

3

, respectively.

Compute (a) the magnitude J of the current density and (b) the

mass per unit length l for a copper cable and (c) J and (d) l for an

aluminum cable.