What is the unit for electrical resistance?

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Prepare for the NCCER Introduction to Electrical Circuits exam. Utilize flashcards and multiple choice questions with hints and explanations to excel on your test.

Multiple Choice

What is the unit for electrical resistance?

Explanation:
Resistance is measured in ohms. The ohm symbol is Ω, and by definition resistance equals voltage divided by current (R = V/I). That means if 1 volt drives 1 ampere through a component, its resistance is 1 ohm. The other units correspond to different quantities: amperes measure current, volts measure potential difference, and watts measure power (P = V × I).

Resistance is measured in ohms. The ohm symbol is Ω, and by definition resistance equals voltage divided by current (R = V/I). That means if 1 volt drives 1 ampere through a component, its resistance is 1 ohm. The other units correspond to different quantities: amperes measure current, volts measure potential difference, and watts measure power (P = V × I).

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