Question 303 of 311

A charge $Q$ is placed at a distance $\dfrac{a}{2}$ above the centre of a square surface of side length $a$. The electric flux through the square surface due to the charge would be?

A$\dfrac{Q}{{6ϵ}_{0}}$B$\dfrac{Q}{{2ϵ}_{0}}$C$\dfrac{Q}{{3ϵ}_{0}}$D$\dfrac{Q}{{ϵ}_{0}}$

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Answer: (A) $\dfrac{Q}{{6ϵ}_{0}}$

Charged particle can be considered at centre of a cube of side $a$, and given surface represents its one face. So, flux $\phi =\dfrac{Q}{{6ϵ}_{0}}$.

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