Question

If a charge q is placed at the center of a closed hemispherical non-conducting surface, the total flux passing through the flat surface would be :

(A) q/ɛ₀

(B) q/2ɛ₀

(C) q/4ɛ₀

(D) q/2πɛ₀

Answer 1

Correct option is (B) q/2ɛ₀

Total flux through complete spherical surface is q/ɛ₀ .

So the flux through curved surface will be q/2ɛ₀ .

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.