The unit of measure for electrical resistance is the

The unit of measure for electrical resistance is the

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

Answer: (A)

Resistance is measured in ohms, the unit that represents how much a component resists current. This comes from Ohm’s law, which states that resistance equals voltage divided by current (R = V / I). So the ohm quantifies how much voltage is needed to push a certain amount of current through a component. For example, with 10 volts across something and 2 amperes flowing, the resistance is 5 ohms. The other units measure different electrical properties: volt is electric potential difference or push that drives current, ampere is the rate of flow of electric charge, and watt is power (voltage times current).

Resistance is measured in ohms, the unit that represents how much a component resists current. This comes from Ohm’s law, which states that resistance equals voltage divided by current (R = V / I). So the ohm quantifies how much voltage is needed to push a certain amount of current through a component. For example, with 10 volts across something and 2 amperes flowing, the resistance is 5 ohms. The other units measure different electrical properties: volt is electric potential difference or push that drives current, ampere is the rate of flow of electric charge, and watt is power (voltage times current).