Question

At the centre of a cubical box, a charge $+Q$ is placed. The value of total flux that is coming out of a wall is

• A. $\frac{Q}{{\epsilon }_0}$
• B. $\frac{Q}{4{\epsilon }_0}$
• C. $\frac{Q}{3{\epsilon }_0}$
• D. $\frac{Q}{6{\epsilon }_0}$

Answer 1

The correct option is D $\frac{Q}{6{\epsilon }_0}$

The flux through entire cube = $\frac{Q}{{\epsilon }_0}$

The flux through one of the walls (or) one face = $\frac{\frac{Q}{{\epsilon }_0}}{6}=\frac{Q}{6{\epsilon }_0}$

Hence, option (d) is the correct answer.