1.2 · 10 ^ 20 electrons pass through the cross-section of the conductor in 2 s. What is the current in the conductor?

t = 2 s.

N = 1.2 * 10 ^ 20.

q = 1.6 * 10 ^ -19 Cl.

I -?

According to the definition, the current I is the ratio of the electric charge Q, which passes through the cross-section of the conductor per unit of time t: I = Q / t.

Since one electron carries an elementary electric charge q = -1.6 * 10 ^ -19 C, the electric charge that passes through the conductor is expressed by the formula: Q = q * N, where N is the number of electrons.

I = q * N / t.

I = 1.6 * 10 ^ -19 C * 1.2 * 10 ^ 20/2 s = 9.6 A.

Answer: the current in the conductor is I = 9.6 A.