Question

A charge of $1pCis$ placed at the centre of a cube of side $0.2m.$ The electric flux leaving each vertex of the cube in $V/m$ is:

• A. $1.12\times {10}^4$
• B. $2.2\times {10}^4$
• C. $1.88\times {10}^4$
• D. $3.14{\times }^4$

Answer 1

Answer: (C)

$1.88\times {10}^4$

Leaving out the flux from each surface of cube

$\frac{1}{6}\frac{q}{{\epsilon }_0}$

=$\frac{1\times {10}^{-6}}{6\times 8.85\times {10}^{-12}}=1.88\times {10}^{4}V/m$