The ammeter shows the current strength of 3 A. How many electrons passed through

| September 23, 2021 | education

The ammeter shows the current strength of 3 A. How many electrons passed through its cross section in 2 s? The electron charge e = -1.6 * 10 and above 10 -19

I = 3 A.

t = 2 s.

q = 1.6 * 10 ^ -19 Cl.

N -?

The strength of the current I shows how much electric charge Q passes through the cross-section of the conductor per unit of time. The current I is determined by the formula: I = Q / t.

Since in metals, the carriers of an electric charge are electrons, the charge of which is q = 1.6 * 10 ^ -19 C, then the total charge will be represented in the form of the formula: Q = q * N, where N is the number of electrons passing through the cross section of the conductor electrons.

I = q * N / t.

N = I * t / q.

N = 3 A * 2 s / 1.6 * 10 ^ -19 Cl = 3.75 * 10 ^ 19.

Answer: N = 3.75 * 10 ^ 19 electrons passed through the cross section of the conductor.



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