What does Ohm measure in electrical terms?

The correct answer is resistance. In electrical terms, Ohm is the unit of measurement for resistance in a circuit. This unit is named after Georg Simon Ohm, who formulated Ohm's Law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor.

Resistance is a crucial concept in understanding how electrical components interact in a circuit. It quantifies how much a material opposes the flow of electric current. For instance, in a simple circuit, if you apply a voltage and measure how much current flows, the resistance can be found by rearranging Ohm's Law; resistance equals voltage divided by current. Understanding resistance is essential for correctly utilizing electrical devices in a salon setting, ensuring safe and effective use of hair dryers, styling tools, and other electronic equipment.