What is the SI unit of electrical resistance?

Study for the High School Physics Test. Study with quizzes, flashcards, and multiple choice questions, each question comes with hints and explanations. Prepare effectively for your exam!

Multiple Choice

What is the SI unit of electrical resistance?

Explanation:
Electrical resistance measures how much a component slows down or resists the flow of electric charges. By Ohm’s law, resistance is the ratio of voltage to current, R = V/I, so the unit that naturally fits this ratio is the ohm. An ohm is defined as the resistance between two points of a conductor where applying a voltage of one volt produces a current of one ampere with no electromotive force present. In practice, that means if you apply 1 volt and get 1 ampere through a device, its resistance is 1 ohm. The ampere is the unit of current, not resistance; the tesla is the unit of magnetic flux density; the joule is the unit of energy. So the unit that characterizes resistance is the ohm.

Electrical resistance measures how much a component slows down or resists the flow of electric charges. By Ohm’s law, resistance is the ratio of voltage to current, R = V/I, so the unit that naturally fits this ratio is the ohm. An ohm is defined as the resistance between two points of a conductor where applying a voltage of one volt produces a current of one ampere with no electromotive force present. In practice, that means if you apply 1 volt and get 1 ampere through a device, its resistance is 1 ohm. The ampere is the unit of current, not resistance; the tesla is the unit of magnetic flux density; the joule is the unit of energy. So the unit that characterizes resistance is the ohm.

Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy