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

2071 315 Electric Charges and Fields Report Error

A

$(n_{1} - n_{2}) e$

9%

B

$(n_{2} - n_{1}) e$

30%

C

$(n_{1} + n_{2}) e$

33%

D

$(\frac{n _{1} + n _{2}}{2})$ e

28%

Solution:

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