How many electrons pass through a 20-$\Omega$ resistor in 10 minutes if there is a potential drop of 30 volts across it?
A)5.6 *1021
B)7.5 *1021
C)9.4 * 1021
D)1.1 * 1021
E)3.8 *1021

Question

Quizplus · Accepted Answer

First, calculate the current using Ohm's Law: I = V/R = 30V/20Ω = 1.5A. Then, find the total charge: Q = I * t = 1.5A * 600s = 900C. Finally, calculate the number of electrons: Number of electrons = Q/e = 900C / (1.6 * 10^-19 C/electron) ≈ 5.6 * 10^21 electrons.

How Many Electrons Pass Through a 20- Ω\OmegaΩ Resistor in 10 Minutes If There Is a Potential Drop

How Many Electrons Pass Through a 20- $\Omega$ Resistor in 10 Minutes If There Is a Potential Drop