What unit measures electrical resistance?

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Prepare for the Milady Electrology Exam. Study with flashcards and multiple-choice questions; each question includes hints and explanations. Ace your exam with confidence!

Multiple Choice

What unit measures electrical resistance?

Explanation:
Electrical resistance is measured in the ohm. It describes how strongly a component resists the flow of electric current. Ohm’s law links these quantities: R = V / I, so the unit of resistance is volts per ampere, defined as one ohm. The symbol is Ω, though you may also see it written as Ohm. For contrast, ampere measures current, volt measures voltage, and watt measures power. For example, if 2 volts drive 2 amperes through a component, the resistance is 1 ohm (R = 2V / 2A = 1 Ω).

Electrical resistance is measured in the ohm. It describes how strongly a component resists the flow of electric current. Ohm’s law links these quantities: R = V / I, so the unit of resistance is volts per ampere, defined as one ohm. The symbol is Ω, though you may also see it written as Ohm. For contrast, ampere measures current, volt measures voltage, and watt measures power. For example, if 2 volts drive 2 amperes through a component, the resistance is 1 ohm (R = 2V / 2A = 1 Ω).

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