What unit is used to measure electrical resistance?

• A. Volts
• B. Amps
• C. Ohms
• D. Watts

Answer: (C)

The correct unit for measuring electrical resistance is ohms. In an electrical system, resistance is a property that determines how easily electric current can flow through a conductor. Ohms are the standard unit of measurement for this property, named after the German physicist Georg Simon Ohm.

When the resistance is high, it means that less current will flow for a given voltage, while low resistance allows more current to move under the same conditions. This relationship is described by Ohm's Law, which states that voltage (in volts) is equal to current (in amps) multiplied by resistance (in ohms).

Understanding resistance is crucial in fields such as electrology, where precision in electrical flow can affect treatment outcomes. The other units mentioned—volts, amps, and watts—serve different purposes in electrical measurements, such as measuring voltage, current, and power, respectively.