Physics
NULL
Medium
Question
How many electrons per second constitute a current of one micro ampere?
A
one electron
B
10⁻⁶ electrons
C
10⁶ electrons
D
6.25 × 10¹² electrons
✓ Official correct answer
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A
one electron
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B
10⁻⁶ electrons
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C
10⁶ electrons
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D
6.25 × 10¹² electrons
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Explanation
One microampere = 10^-6 C/s. Dividing by the electron charge (1.6x10^-19 C) gives 10^-6/1.6x10^-19 = 6.25x10^12 electrons per second.
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