Milady Standard Esthetics 12th Edition Practice Test

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What is the SI unit that measures the strength of an electric current?

Volt

Ohm

Ampere

The ampere measures the rate at which electric charges flow, i.e., the strength of an electric current. It is defined as one coulomb of charge passing a point each second. The other units describe different things: volt is electrical potential difference, ohm is resistance, and watt is power. These relate by I = V/R and P = V × I, but the ampere specifically quantifies how much current is flowing.

Watt

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