How many electrons pass in 10 seconds through the cross-section of a conductor with a current

How many electrons pass in 10 seconds through the cross-section of a conductor with a current power of 150W and a voltage of 220V?

t = 10 s.

N = 150 W.

U = 220 V.

q = 1.6 * 10 ^ -19 Cl.

n -?

The number of electrons n is found by the formula: n = Q / q, where Q is the charge that has passed through the cross section of the conductor, q is the charge of one electron.

The current power N is expressed by the formula: N = U * I, where U is the voltage, I is the current strength.

According to the definition, the current strength I is the charge that has passed per unit of time through the cross-section of the conductor: I = Q / t.

N = U * Q / t.

The electric charge Q will be expressed by the formula: Q = N * t / U.

n = N * t / q * U.

n = 150 W * 10 s / 1.6 * 10 ^ -19 C * 220 V = 4.26 * 10 ^ 19.

Answer: n = 4.26 * 10 ^ 19 electrons pass through the cross section of the conductor.