A point charge + q is placed at centre of a cube of side L . electric flux emerging from cube is

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1. Electric Charges and Fields

easy

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

A

$\frac{q}{{{\varepsilon _0}}}$

B

Zero

C

$\frac{{6q{L^2}}}{{{\varepsilon _0}}}$

D

$\frac{q}{{6{L^2}{\varepsilon _0}}}$

(AIPMT-1996)

Solution

(a) Electric flux coming out through a closed surface is $q/\varepsilon _0.$

Standard 12

Physics

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