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1. Electric Charges and Fields
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If a charge $q$ is placed at the centre of a closed hemispherical non-conducting surface, the total flux passing through the flat surface would be
A
$\frac{q}{\varepsilon_{0}}$
B
$\frac{q}{2 \varepsilon_{0}}$
C
$\frac{q}{4 \varepsilon_{0}}$
D
$\frac{ q }{2 \pi \varepsilon_{0}}$
(JEE MAIN-2022)
Solution
Total flux through complete spherical surface is $\frac{ q }{\varepsilon_{0}}$
So the flux through curved surface will be $\frac{q}{2 \varepsilon_{0}}$. The flux through flat surface will be zero.
Remark : Electric flux through flat surface is zero but no option is given, option is available for electric flux passing through curved surface.
Standard 12
Physics
