Let $\rho (r)\, = \frac{Q}{{\pi {R^4}}}\,r$ be the volume charge density distribution for a solid sphere of radius $R$ and total charge $Q$. For a point $'p'$ inside the sphere at distance $r_1$ from the centre of the sphere, the magnitude of electric field is
$0$
$\frac{Q}{{4\pi {\varepsilon _0}r_1^2}}\,$
$\frac{{Q{r_1}}}{{4\pi {\varepsilon _0}{r^4}}}\,$
$\frac{{Qr_{_1}^2}}{{4\pi {\varepsilon _0}{R^4}}}\,$
According to Gauss’ Theorem, electric field of an infinitely long straight wire is proportional to
Explain by graph how the electric field by thin spherical shell depends on the distance of point from centre.
Let $\sigma$ be the uniform surface charge density of two infinite thin plane sheets shown in figure. Then the electric fields in three different region $E_{ I }, E_{ II }$ and $E_{III}$ are
Consider $a$ uniformly charged hemispherical shell of radius $R$ and charge $Q$ . If field at point $A (0, 0, -z_0)$ is $ \vec E$ then field at point $(0, 0, z_0)$ is $[z_0 < R]$
Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of magnitude $17.0\times 10^{-22}\; C/m^2$. What is $E$:
$(a)$ in the outer region of the first plate,
$(b)$ in the outer region of the second plate, and
$(c)$ between the plates?