List of top Physics Questions on Gauss Law asked in COMEDK UGET

A charge of $5\mu\text{C}$ is placed at the center of a spherical shell $S_1$ of radius $10\text{ cm}$. Now this system is enclosed inside another spherical shell $S_2$ of radius $20\text{ cm}$. The ratio of the electrical flux through the surface $S_2$ to $S_1$ is:

A uniformly charged conducting sphere of \(0.2\,\text{m}\) diameter has a surface charge density of \(70\,\mu \text{C m}^{-2}\). The electric flux leaving the surface of the sphere is: