What unit measures electrical resistance?

What unit measures electrical resistance?

• A. Watt
• B. Volt
• C. Ohm
• D. Ampere

Answer: (C)

The unit that measures electrical resistance is the Ohm. This unit is named after the German physicist Georg Simon Ohm, who established Ohm's Law, which describes the relationship between voltage, current, and resistance in an electrical circuit. According to Ohm's Law, resistance can be defined as the ratio of voltage (measured in volts) to current (measured in amperes). Understanding resistance is essential for analyzing how electrical circuits function, as it indicates how much a material opposes the flow of electric current. High resistance means that the material does not allow current to flow easily, while low resistance means that current can flow more freely. In contrast, other units such as watts measure power (the rate at which electrical energy is used), volts measure electrical potential, and amperes measure the flow of electric current. Each of these units plays a distinct role in the study of electricity, but only the Ohm specifically quantifies electrical resistance, making it the correct choice in this context.

The unit that measures electrical resistance is the Ohm. This unit is named after the German physicist Georg Simon Ohm, who established Ohm's Law, which describes the relationship between voltage, current, and resistance in an electrical circuit. According to Ohm's Law, resistance can be defined as the ratio of voltage (measured in volts) to current (measured in amperes).

Understanding resistance is essential for analyzing how electrical circuits function, as it indicates how much a material opposes the flow of electric current. High resistance means that the material does not allow current to flow easily, while low resistance means that current can flow more freely.

In contrast, other units such as watts measure power (the rate at which electrical energy is used), volts measure electrical potential, and amperes measure the flow of electric current. Each of these units plays a distinct role in the study of electricity, but only the Ohm specifically quantifies electrical resistance, making it the correct choice in this context.