I have a coil. I want to accurately measure the amount of energy/current that it uses when pulsed with one single square wave. I know I can take a voltage and current measurement and multiply them together to get a wattage. is that the only way? is there such as thing as a wattmeter? that just simply tells me how much energy was just used? I guess its a stupid question.
a side question - if I set my power supply to "constant current mode" (say at .3A) and at 12V the most my coil can draw is 3.6 Watts correct? so this would happen when I simply short the power supply with my coil.