A charge q is placed at the centre |Electrostatics|JEE-Main

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JEE MAIN 2022

27-06-2022 S2

Question

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 :

Select the correct option:

A

$\frac{q}{\varepsilon_0}$

B

$\frac{q}{2 \varepsilon_0}$

C

$\frac{q}{4 \varepsilon_0}$

D

$\frac{q}{2 \pi \varepsilon_0}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

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.

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