In reading the definition of impedance matched wiring a question popped into my head that I can’t seem to find the answer to. Assuming a 50 ohm impedance line that is infinity long, then in theory if I attached a voltmeter I am able to see 50 ohm resistance. However what keeps me bugged is what would be the current graph look like for a very long but not infinite transmission line that terminates in an actual load.
Suppose we have a very very long 50 ohm impedance matched transmission line that is connected in a 1k resistor (like a basic lamp circuit with very long wires). If I apply a 5 volt DC at the source, assuming an infinitely fast sampling ammeter I should first see the current of 0.1A before the current settles to 5 mA. Is this assumption correct or am I missing something. Thank!