A current of $5.0$ A flows through an electrical device for 10 seconds. How many electrons flow through this device during this time? $\left( e = 1.60 \times 10 ^ { - 19 } \mathrm { C } \right)$
A) 20
B) $0.20$
C) $31 \times 10 ^ { 20 }$
D) $3.1 \times 10 ^ { 20 }$
E) $2.0$

Question

Quizplus · Accepted Answer

The charge transferred is calculated using the formula $Q = It$, where $I = 5.0$ A and $t = 10$ s, giving $Q = 50$ C. The number of electrons is $Q/e = 50 \, \text{C} / (1.60 \times 10^{-19} \, \text{C/electron}) = 3.125 \times 10^{20}$, which rounds to $3.1 \times 10^{20}$.

A Current Of 5.05.05.0 A Flows Through an Electrical Device for 10 Seconds

A Current Of $5.0$ A Flows Through an Electrical Device for 10 Seconds