Which quantity is measured in Ohms?

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Multiple Choice

Which quantity is measured in Ohms?

Resistance is measured in ohms. This unit comes from Ohm’s law, R = V / I, where voltage is in volts and current is in amperes. Since volts per ampere defines the ohm, resistance is the quantity expressed in ohms. The other quantities use different units—voltage in volts, current in amperes, and power in watts—so they aren’t measured in ohms. For example, with 9 V across a component and 3 A flowing, the resistance is 3 Ω.

Resistance is measured in ohms. This unit comes from Ohm’s law, R = V / I, where voltage is in volts and current is in amperes. Since volts per ampere defines the ohm, resistance is the quantity expressed in ohms. The other quantities use different units—voltage in volts, current in amperes, and power in watts—so they aren’t measured in ohms. For example, with 9 V across a component and 3 A flowing, the resistance is 3 Ω.

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