What is the standard unit of measure for electrical resistance?

The standard unit of measure for electrical resistance is the ohm. This unit is named after the German physicist Georg Simon Ohm, who formulated Ohm's Law, which relates voltage, current, and resistance in an electrical circuit.

In terms of electrical parameters, resistance quantifies how much a material opposes the flow of electric current. The basic relationship is expressed through Ohm's Law: Voltage (V) = Current (I) × Resistance (R). Here, resistance is measured in ohms, denoted by the Greek letter omega (Ω).

Understanding resistance is crucial for designing and analyzing electrical circuits, as it directly affects the amount of current that will flow for a given voltage. The other units listed—volts (a measure of electric potential), amperes (a measure of electric current), and watts (a measure of power)—each represent different electrical quantities and are not directly related to the measurement of resistance itself.