Question

$6\times {10}^{17}$ electrons passes through a cross-sectional area of a wire per minute. What is the electric current ?

• A. $4.8\text{mA}$
• B. $0.8\text{mA}$
• C. $1.6\text{mA}$
• D. $3.2\text{mA}$

Answer 1

The correct option is C $1.6\text{mA}$

We know that, electric current,

$i=\frac{q}{t}=\frac{ne}{t}$

$\Rightarrow i=\frac{6\times {10}^{17}\times 1.6\times {10}^{-19}}{60}=1.6\times {10}^{-3}\text{A}=1.6\text{mA}$