What does the term 'Ohm' refer to in electrical measurements?

The term 'Ohm' refers to the unit of measurement for electrical resistance in a circuit. It is named after the German physicist Georg Simon Ohm, who formulated Ohm's Law, outlining the relationship between voltage, current, and resistance.

In practical terms, when measuring a conductor's opposition to the flow of electric current, the resistance is quantified in ohms. This means that if a device has a resistance of one ohm, a voltage of one volt applied across it will produce a current of one ampere flowing through the conductor. Understanding resistance is crucial for anyone working with electrical systems, as it plays a key role in how circuits function, impacting both performance and safety.

The other terms in the question—current, voltage, and power—relate to different aspects of electrical systems. Current refers to the flow of electric charge, voltage measures the potential difference that drives the current, and power relates to the rate of energy transfer in the circuit. However, none of these terms directly correspond to the measurement of resistance as does the 'Ohm.'