Question

If $3.2\times {10}^{17}$ electrons pass through a wire in 0.5s. Calculate the current through it if charge on each electron is $1.6\times {10}^{-19}C$.

• A. 0.220A
• B. 22A
• C. 0.102A
• D. 8A

Answer 1

Answer: (C)

0.102A

Given : $t=0.5$ s $q=1.6\times {10}^{-19}$ C

Number of electrons $n=3.2\times {10}^{17}$

$\therefore$ Current $I=\frac{ne}{t}=\frac{3.2\times {10}^{17}\times 1.6\times {10}^{-19}}{0.5}=0.102$ A