How do you know where the load is?

[Mattjd]

Embarrassing to say but I've never really understood Thevivin and Norton. Even following this guide

https://www.allaboutcircuits.com/textbook/direct-current/chpt-10/thevenins-theorem/

I've never understood how they determined what the "load" is. I'm currently in a Controls class and the textbook is going over some transfer functions for RLC circuits using impedence/admittances

https://imgur.com/a/a8zGy

The original circuit is the first, and the second is them applying Norton's theorem and I just have no idea how they determined to do that, at all.

I'm sorry if this is vague. I know thevenin is a voltage source in series with load resistance and Nortons is a current source in parallel with the load resistance but as far as determining what the load is from the original circuit I just have no idea.

If anyone could explain this to me once and for that would be AMAZING.

[IanB]

You get to choose. You "look into" the circuit between two points, and everything you are "looking into" (in front of you) is the source, everything behind you is the load.