Answer by
Ragtagduo (14)
There's a few, but the most used one is Ohms law. Ohms law says E=RI where E = Voltage, R = Resistance or Ohms, and I = Current or Amperes. Other common formulas include W=EI, W=RI^2, W=(E^2)/R. W in these examples are power or Watts. There's also I=E/R, I=W/E, I=(W/R)^2 for current formulas, and for resistances, R=E/I, R=(E^2)/W, and R=W/(I^2).