Electric Charges and Fields - Result Question 44

44. A point charge $+q$ is placed at mid point of a cube of side ’ $L$ ‘. The electric flux emerging from the cube is

[1996]

(a) $\frac{q}{\varepsilon_0}$

(b) $\frac{6 q L^{2}}{\varepsilon_0}$

(c) $\frac{q}{6 L^{2} \varepsilon_0}$

(d) zero

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Answer:

Correct Answer: 44. (a)

Solution:

  1. (a) By Gauss theorem

Total electric flux $=\frac{\text{ Total ch arge inside cube }}{\varepsilon_0}$

$\Rightarrow \phi=\frac{q}{\varepsilon_0}$