Question

Define 'Linear charge density' and surface charge density at a point.

Answer 1

Linear charge density:-

The linear charge density is a ratio of a particle's charge $dq$ (situated in a infinite line ) to the infinitesinal line element (thw samll length where the element is situated)

line charge density $\lambda =\frac{aq}{de}$

total charge $q={\int }_0^L\lambda dl$

Surface charge density :-

the surface charge density is a ratio of the charge on the particular surface to the area of surface $\left(ds\right)$

Surface charge density, $6=\frac{dq}{ds}$

total charge, $q={\int }_0^{s}6\left(r\right)ds$