Ohm’s Law

—The law that, considering a steady flow of electricity in a given circuit, the amount of current in amperes is equal to the electromotive force in volts divided by the resistance in ohms; this law was first announced by Ohm, the German scientist, from whom it received its name. The law may be expre ed in three simple formulas, when I is used as the symbol of the current strength in amperes, R as that of the resistance in ohms, snd E equals the electromotive force in volts, as follows: 1. I = =, which reads: The current in amperes equals the electromotive force in volts divided by the resistance in ohms. 2, E =IR, which reads: The electromotive force in volts equals the current in amperes multiplied by the resistance in ohms. F 3. R ==, which reads: The resistance in ohms equals the electromotive force in volts divided by, the current in amperes.