Question

A point charge q is kept on the vertex of the cone of base radius r and height r The electric flux through the curved surface will be

• A. $\frac{q}{2{\epsilon }_0}(1-\frac{1}{\sqrt{2}})$
• B. $\frac{q}{{\epsilon }_0}\left(\frac{1}{2\sqrt{2}}\right)$
• C. zero
• D. $\frac{q}{{\epsilon }_0\sqrt{2}}$

Answer 1

The correct option is C zero

Since curved surface is parallel to the electric field of the point charge therefore, area vector of curved surface makes 90 angle with electric field of point charge. Therefore, flux through the curved surface is zero.

option (C).