Question

A point charge of value ${10}^{-7}C$ is situated at the centre of cube of $1m$ side. The electric flux through its total surface area is:

• A. $113\times {10}^{4}N{m}^2/C$
• B. $11.3\times {10}^{4}N{m}^2/C$
• C. $1.13\times {10}^{4}N{m}^2/C$
• D. $noneofthese$

Answer 1

The correct option is C $1.13\times {10}^{4}N{m}^2/C$

Given that,

Charge $q={10}^{-7}C$

We know that,

The electric flux is

$\varphi =\frac{q}{{\epsilon }_0}$

$\varphi =\frac{{10}^{-7}}{8.85\times {10}^{-12}}$

$\varphi =0.1129\times {10}^5$

$\varphi =1.13\times {10}^{4}N{m}^2/C$

Hence, the flux is $1.13\times {10}^{4}N{m}^2/C$