How many electrons pass through the filament of an incandescent lamp in 5 minutes at a lamp current of 16 kA?

Data: t (time of movement of electrons through the lamp spiral) = 5 min = 300 s; I (lamp current) = 16 kA = 16 * 10 ^ 3 A.

Constants: e (value of the electron charge) = 1.6 * 10 ^ -19 Cl.

1) Let’s calculate the amount of charge that passed through the lamp spiral: q = I * t = 16 * 10 ^ 3 * 300 = 48 * 10 ^ 5 Cl.

2) Let’s calculate the number of electrons passing through the filament of the lamp: n = q / e = 48 * 10 ^ 5 / (1.6 * 10 ^ -19) = 30 * 10 ^ 24 electrons.

Answer: 30 * 10 ^ 24 electrons passed through the filament of the lamp.