Question

what is an ampere (SI)used to express​

Answer 1

Answer:

ampere. [ ăm′pîr′ ] The SI unit used to measure electric current. Electric current through any given cross-section (such as a cross-section of a wire) may be measured as the amount of electrical charge moving through that cross-section in one second...

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Answer 2

Answer:

The ampere is a measure of the amount of electric charge in motion per unit time ― that is, electric current.