Question

A charge q is placed at the centre of a cylinder as shown. Find the flux through the cylindrical surface.

• A. $\frac{q}{{\epsilon }_0}\left(\frac{L}{\sqrt{L^2+R^2}}\right)$
• B. $\frac{q}{{\epsilon }_0}\left(\frac{L}{\sqrt{L^2+4R^2}}\right)$
• C. $\frac{q}{{\epsilon }_0}\left(\frac{L}{\sqrt{4L^2+R^2}}\right)$
• D. zero

Answer 1

The correct option is B $\frac{q}{{\epsilon }_0}\left(\frac{L}{\sqrt{L^2+4R^2}}\right)$