If 16mA of current flows through a conductor in one second; the number of electron transported per seconds is? [1 electronic charge = 1.6 x 10^-19C]

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A. 1.0 x 1020
B. 1.0 x 10-18
C. 1.0 x 10-17
D. 1.0 x 1017

Correct Answer:

Option D – 1.0 x 1017

Explanation

Current (I) = q/t → q = i x t
= 16 x 10-3 x 1
= 1.6 x 10-2C
But 1.6 x 10-19C = I electronic charge
1 coulomb = 1 / (1.6×10-19)
∴ 1.6 x 10-2 coulombs = 1 / (1.6×10-19) x 1.6×10-2 / 1
= 1.0 x 10-2 x 1019
= 1.0 x 1017

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