प्रति इकाई लंबाई प्रेरकत्व L और प्रति इकाई लंबाई धारिता C वाली दो-तार दोषरहित ट्रांसमिशन लाइन की विशेषता प्रतिबाधा (characteristic impedance) किसके द्वारा दी जाती है?

A lossless transmission line with characteristic impedance Z0 = 50 Ω is connected in parallel with another identical 50 Ω transmission line at the load end. What is the total combined equivalent input impedance (in Ω) seen at the junction for a parallel load consisting of two matched 50 Ω lines connected in parallel?

A transmission line has a characteristic impedance and load impedance of 100 Ω. The line is excited by a sinusoidal voltage source of 5 GHz. If the phase difference between two points spaced 1 mm apart is equal to π/4 radians, the phase velocity of the wave along the line is: