[...] Congrats Hugh, you worked it out - use a thermometer, and to be really scientific measure the temperature when shorted, and when open circuit. Or, maybe simpler, use a compass near the black b
No Steve, this doesn't work. - Although I fell into that trap initially. For a Thevenin network, if you connect an external 1V source, you will get either 2A or zero flowing depending on polarity, as
I thought the whole point of these theoretical sources is they were interchangeable. I did wonder if you could use a thermometer to measure the temperature rise, as the 1 ohm resistor would dissipate
