How many electrons will pass in 1 second through the cross-section of the conductor for the Ammeter
| April 2, 2021 | education
How many electrons will pass in 1 second through the cross-section of the conductor for the Ammeter to show 1 * 10 ^ -3.
To find the required number of electrons that have passed through the conductor, we will use the formula: I = q / t = n * qe / t, whence we express: n = I * t / qe.
Constants and variables: I – the current that must be shown to the ammeter (I = 1 * 10 ^ -3 A); t – elapsed time (t = 1 s); qе – electron charge (qе = -1.6 * 10 ^ -19 C).
Calculation: n = I * t / qe = 1 * 10 ^ -3 * 1 / (1.6 * 10 ^ -19) = 6.25 * 10 ^ 15 electrons.
Answer: In 1 s, 6 * 10 ^ 25 electrons will pass through the conductor.
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