A charge q is surrounded.... | JEE Advanced | Electrostatics

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A charge $q$ is surrounded by a closed surface consisting of an inverted cone of height $h$ and base radius $R$, and a hemisphere of radius $R$ as shown in the figure. The electric flux through the conical surface is $\frac{n q}{6 \varepsilon_0}$ (in $S I$ units). The value of $n$ is $\_\_\_\_$

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