Question

If a body contains $n_{1}$ electrons and $n_{2}$ protons, the total amount of charge on the body is

• A. $\left(n_{1}-n_{2}\right) e$
• B. $\left(n_{2}-n_{1}\right) e$
• C. $\left(n_{1}+n_{2}\right) e$
• D. $\left(\frac{n_{1}+n_{2}}{2}\right)$ e

Answer 1

Answer: (B)

$q=n_{2} \times e+n_{1} \times(-e)=\left(n_{2}-n_{1}\right) e$