Final answer:
The characteristic impedance of the transmission line is 305.44 Ω.
Step-by-step explanation:
The characteristic impedance of a transmission line is given by the formula:
Z0 = sqrt(L/C)
Where L is the inductance per unit length and C is the capacitance per unit length.
In this case, the inductance is given as 1.05 mH/km/ph and the capacitance is given as 11.86nF/km/ph. Converting these values to per meter, we get:
L = 1.05 μH/m/ph and C = 11.86 pF/m/ph.
Substituting these values into the formula:
Z0 = sqrt(1.05 μH/m/ph / 11.86 pF/m/ph) = 305.44 Ω