Question

When ${10}^{14}$ electrons are removed from a neutral metal sphere, the charge on the sphere becomes

• A. $16\mu C$
• B. $-16\mu C$
• C. $32\mu C$
• D. $-32\mu C$

Answer 1

The correct option is A $16\mu C$

$Q=ne={10}^{14}\times 1.6\times {10}^{-19}\Rightarrow Q=1.6\times {10}^{-5}C=16\mu C$
Electrons are removed, so chare will be positive.