In figure (a), a charge q is placed just outside the centre of a closed hemisphere. In figure (b), the same charge q is placed just inside the centre of the closed hemisphere and in figure (c), the charge is placed at the centre of hemisphere open from the base. Find the electric flux passing through the hemisphere in all the three cases.

Explanation

In figure (a) `phi=0`
In figure (b) `phi=q//epsilon_(0)`
In figure ( c ) `phi=q//2epsilon_(0)`