Colorado Esthetician Written Practice Exam

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What does the ampere (A) measure in an electric current?

Amount of an electric current

The ampere (A) measures the amount of an electric current, or the rate at which electric charges flow through a circuit. This option is correct because the unit "ampere" is defined as one coulomb (a unit of electrical charge) per second. Option B is incorrect because electric energy is actually measured in joules (J), not seconds. Option C is incorrect because pressure or force do not play a direct role in the measurement of electric current. Option D is incorrect because resistance is measured in Ohms (Ω), not amperes (A).

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Electric energy being used in 1 second

Pressure or force that pushes the flow of electrons forward

Resistance of an electric current