What is the unit of resistance?

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Study for the Con Edison Basic Electric Test. Prepare with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What is the unit of resistance?

Explanation:
Resistance measures how much a component resists current flow. The unit used is the ohm. One ohm is defined as the resistance between two points of a conductor when a constant potential difference of one volt, applied to those points, produces a current of one ampere, with no electromotive force in the conductor. This aligns with Ohm's law, V = I R, so the unit of resistance is volts per ampere, i.e., ohm. The volt is the unit of potential difference, the ampere is the unit of current, and the joule is a unit of energy, not resistance. Therefore, the unit of resistance is ohm.

Resistance measures how much a component resists current flow. The unit used is the ohm. One ohm is defined as the resistance between two points of a conductor when a constant potential difference of one volt, applied to those points, produces a current of one ampere, with no electromotive force in the conductor. This aligns with Ohm's law, V = I R, so the unit of resistance is volts per ampere, i.e., ohm. The volt is the unit of potential difference, the ampere is the unit of current, and the joule is a unit of energy, not resistance. Therefore, the unit of resistance is ohm.

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