Question

If a current of $1.5$ ampere flows through a metallic wire for $3$ hours, then how many electrons would flow through the wire?

• A. $2.25 \times 10^{22}$ electrons
• B. $1.13 \times 10^{23}$ electrons
• C. $1.01 \times 10^{23}$ electrons
• D. $4.5 \times 10^{23}$ electrons

Answer 1

Answer: (C)

$Q=I\times t=1.5\times3\times60\times60$
$=16200\,C$
Charge on $1$ electron $=1.602\times10^{-19}\,C$
$16200\,C$ charge is on $\frac{1\times16200}{1.602\times10^{-19}}$ electrons
$=1.01\times10^{23}$ electrons