# The current in a copper wire is 1.6 A. How many electrons will pass through the cross

August 29, 2021 | education

| **The current in a copper wire is 1.6 A. How many electrons will pass through the cross section of this wire in 1 hour? The electron charge modulus is 1.6 * 10 ^ -19 C.**

To find the number of electrons passing through the cross section of the copper wire used, we use the equality: n * e = q = I * t, whence n = I * t / e.

Variables and constants: I – current in the wire (I = 1.6 A); t – elapsed time (t = 1 h = 3600 s); e – the modulus of the electron charge (e = 1.6 * 10 ^ -19 C).

Let’s calculate: n = I * t / e = 1.6 * 3600 / (1.6 * 10 ^ -19) = 3.6 * 10 ^ 22 electrons.

Answer: 3.6 * 10 ^ 22 electrons passed through the cross section of the copper wire used.

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