What does Ohm measure in an electrical context?

Ohm is the unit of measurement used to quantify electrical resistance, which is the property of a material that impedes the flow of electric current. Resistance indicates how much a material opposes the movement of electrons. In a circuit, higher resistance means that it is more difficult for current to flow through the conductor. This is governed by Ohm's Law, which relates voltage (V), current (I), and resistance (R) in the formula V = IR. Understanding this concept is essential for analyzing and designing electrical circuits, as it helps determine how different materials and components will behave under varying electrical conditions.