Answer to Question #87811 in Electricity and Magnetism for Yash Pant

Question

A charge +q is placed at the centre of the base of a cone . What is the flux through its curved surface ?

Answer 1

If we imagine another cone of the same dimension having the same base but heading in the opposite direction, then the flux of electric field through the closed surface formed by the two cones, according to the Gauss law, would be equal to $q \over \epsilon_0$. By symmetry, the flux through the curved surface of each of the two cones constitutes half of this value, i.e., is equal to $q \over 2 \epsilon_0$.

Answer: $q \over 2 \epsilon_0$.