What is the unit of resistance?

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Multiple Choice

What is the unit of resistance?

Resistance is a property that limits how much current can flow for a given voltage. The unit used to measure this resistance is the ohm, symbolized by the Greek letter omega (Ω). This comes from Ohm’s law, which links voltage, current, and resistance: V = I × R. Rewriting gives R = V / I, so the ohm is defined by the relationship between one volt of potential difference and one ampere of current. In practical terms, one ohm means that applying one volt yields one ampere, under the defined conditions. Other common electrical units—volts for potential difference, amperes for current, and watts for power—measure different quantities, so the correct unit for resistance is the ohm.

Resistance is a property that limits how much current can flow for a given voltage. The unit used to measure this resistance is the ohm, symbolized by the Greek letter omega (Ω). This comes from Ohm’s law, which links voltage, current, and resistance: V = I × R. Rewriting gives R = V / I, so the ohm is defined by the relationship between one volt of potential difference and one ampere of current. In practical terms, one ohm means that applying one volt yields one ampere, under the defined conditions. Other common electrical units—volts for potential difference, amperes for current, and watts for power—measure different quantities, so the correct unit for resistance is the ohm.

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