Question

A metal sphere has a charge of $-6\mu C$. When $5\times {10}^{12}$ electrons are removed from the sphere, what would be net charge on it?

• A. $-6.8\mu C$
• B. $6.8\mu C$
• C. $5.2\mu C$
• D. $-5.2\mu C$

Answer 1

The correct option is D $-5.2\mu C$

Charge removed=$-e\times n=-1.6\times {10}^{-19}\times 5\times {10}^{12}=-8\times {10}^{-7}=-0.8\mu C$

Hence, charge on sphere=$-6-(-0.8)=-5.2\mu C$

Answer-(D)