Colorado Esthetician Written Practice Exam

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1/1000 of an ampere is known as what unit?

Megampere (MA)
Microampere (μA)
Milliampere (mA)
Nanoampere (nA)

The correct answer is: Milliampere (mA)

One-thousandth of an ampere is known as a milliampere (mA). The prefix "milli-" denotes one-thousandth of the base unit, which in this case is an ampere. Therefore, C. Milliampere (mA) is the correct unit for 1/1000 of an ampere.