An arbitrary surface encloses a dipole. What is the electric flux through this surface ?
According to Gauss's law, the flux associated with close surface is $\phi=\frac{\Sigma q}{\epsilon_{0}}$ where $q$ is charge enclosed by closed surface.
Net charge on dipole $=-q+q=0$
$\therefore$ Flux associated with closed surface enclosing dipole, $\phi=\frac{-q+q}{\epsilon_{0}}=0$
A charge $q$ is placed at the centre of the open end of cylindrical vessel. The flux of the electric field through the surface of the vessel is
A point charge $ + q$ is placed at the centre of a cube of side $L$. The electric flux emerging from the cube is
Give reason : ''If net flux assocaited with closed surface is zero, then net charge enclosed by that surface is zero''.
Why do electric field lines not form closed loop ?
A metallic sphere is kept in between two oppositely charged plates. The most appropriate representation of the field lines is