Question

From a neutral body ${10}^6$ electrons are removed. Calculate the charge on the body.

• A. $-1.6\times {10}^{-3}C$
• B. $1.6\times {10}^{-13}C$
• C. $-1.6\times {10}^{-13}C$
• D. $1.6\times {10}^{3}C$

Answer 1

The correct option is B $1.6\times {10}^{-13}C$

Using $Q=ne$

$n={10}^6$

$e=1.6\times {10}^{-19}$

$Q={10}^6\times 1.6\times {10}^{-19}$

$=1.6\times {10}^{-13}C$

Since electrons are removed, so the charge on the body is positive.