Resistance is measured in which unit?

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

Answer: (C)

Resistance is measured in ohms, which is the unit that quantifies the opposition to the flow of electric current in a circuit. The name "ohm" comes from the physicist Georg Simon Ohm, who formulated Ohm's Law, establishing the relationship between voltage, current, and resistance. According to Ohm's Law, resistance (R) can be calculated using the formula R = V/I, where V represents voltage in volts and I represents current in amperes. Because of this established relationship, ohms serve as a crucial unit in identifying how much resistance a component offers in an electrical circuit, allowing for better understanding and analysis of circuit behavior.

The other options represent different electrical concepts: volts measure electric potential, amperes measure current flow, and watts measure power. All these units are vital in electronics but serve different functions than resistance.