Determine the current in the circuit if the total mass of all electrons passing through the cross section in 0.5 s is 10 ^ -9 degrees.

Initial data: t (time of passage of electrons through the conductor) = 0.5 s; m (total mass of electrons passed through the conductor) = 10 ^ -9 kg.

Constants: m0 (electron mass) = 9.11 * 10 ^ -31 kg; e (electron charge) = 1.6 * 10 ^ -19 C.

1) The number of electrons passed through the conductor: n = m / m0 = 10 ^ -9 / (9.11 * 10 ^ -31) = 10.98 * 10 ^ 20 electrons.

2) The charge, which was made up of electrons: q = n * e = 10.98 * 10 ^ 20 * 1.6 * 10 ^ -19 = 175.6 C.

3) Current in the circuit: I = q / t = 175.6 / 0.5 = 351.2 A.