Question

Calculate the charge on a body if ${10}^5$ electrons have been added to it

• A. $-1.6\times {10}^{-14}C$
• B. $1.6\times {10}^{-14}C$
• C. $1.6\times {10}^{14}C$
• D. $-1.6\times {10}^{14}C$

Answer 1

The correct option is A $-1.6\times {10}^{-14}C$

Using $Q=ne$

Q = charge on a body

n = number of electrons

e = charge on one electron

$Q=-{10}^5\times 1.6\times {10}^{-19}$

$=-1.6\times {10}^{-14}C$

Since electrons are added, so the charge on the body is negative.