A current of 1 mA is flowing through a copper wire. How man…

Physics Current Electricity Electric Conduction, Ohm's Law, Electric Current, Potential Deffrence Single Correct MCQ

Published on: September 12, 2026

A current of 1 mA is flowing through a copper wire. How many electrons will pass a given point in one second [ $e = 1.6 \times 10^{-19}$ Coulomb]

$6.25 \times 10^{19}$

$6.25 \times 10^{15}$

$6.25 \times 10^{31}$

$6.25 \times 10^{8}$

Text Solution

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The correct answer is:

$n = \frac{1 \times 10^{-3}}{1.6 \times 10^{-19}} = 6.25 \times 10^{15}$

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