It's cool to see science at work in everyday appliances and utilities. So, I looked up the meaning of resistance in this case, and it's a measure of the opposition to current flow in an electrical circuit. Why is opposition (resistance) necessary in a circuit? How would Ohm even know to 'factor' in resistance? (what is ''resisting'' exactly, within the circuit?) https://studiousguy.com/examples-of-ohms-law-in-everyday-life/ Edit - I received an answer - resistance is like friction within a system. A property that Ohm quantified. It is much clearer now, but I still wonder how resistance can be observed in a circuit? Edit 2: I actually understand this a bit more now, but here is a helpful link: https://www.allaboutcircuits.com/textbook/direct-current/chpt-1/resistance/ This is going on when I turn on my ceiling fan? Pretty cool.