Ohm's Law and Peak vs. Root-Mean-Square (RMS) signals ... AC

This is the simplest of the simplest - just a resistor and an (AC - to let you see what's going on better) voltage source. It also calculates POWER and RMS voltage, current and power - check these by hand-calculation to confirm your understanding. Remember that RMS stands for Root Mean Square - so:-

  1. Figure out what the squared V, I or P is over one cycle
  2. Take the mean of that
  3. Take the square root of that ... you now have your RMS thing.