An electric charge $q$ is placed at the centre of a cube of side $\alpha $. The electric flux on one of its faces will be
An electric charge $q$ is placed at the centre of a cube of side $\alpha $. The electric flux on one of its faces will be
- [AIIMS 2001]
- A
$\frac{q}{{6{\varepsilon _0}}}$
- B
$\frac{q}{{{\varepsilon _0}{a^2}}}$
- C
$\frac{q}{{4\pi {\varepsilon _0}{a^2}}}$
- D
$\frac{q}{{{\varepsilon _0}}}$
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A long cylindrical volume contains a uniformly distributed charge of density $\rho \;Cm ^{-3}$. The electric field inside the cylindrical volume at a distance $x =\frac{2 \varepsilon_{0}}{\rho} m$ from its axis is $.......Vm ^{-1}$
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- [JEE MAIN 2022]