Q’s: Electricity Basics

In general, I’m pretty baffled by all of this week’s material. I think seeing some working examples will help the theory make more sense. Here are some specific questions in the meantime:

  1. In Ohm’s Law, what measurements would I use for V and R and where would I get those measurements?
  2. What are the units used to measure volts, amps and ohms, and how do they relate to each other?
  3. How do you decide where to set the dial on the multimeter before you test your circuit?
  4. The explanation of voltage as the height of the mountain is confusing to me. In my head, it would make sense that resistance would lessen the voltage over time. But in the mountain example, I imagine the avalanche picks up speed as it falls. Can you explain this example of voltage in more depth?
  5. I don’t understand this: “resistors divide voltage when in series, and divide amperage when in parallel.” I understand how the current flows differently between series and parallel, but I don’t understand why one affects voltage, and the other affects amperage.
  6. The LED current video made sense in theory, but the examples confused me. Again, I think this will make more sense in practice.

Cover photo: Screenshot from this video by Jeff Feddersen.