A hollow metal sphere of radius $R$ is uniformly charged. The electric field due to the sphere at a distance r from the centre
increases as $\mathrm{r}$ increases for $\mathrm{r}<\mathrm{R}$ and for $\mathrm{r}>\mathrm{R}$
zero as $\mathrm{r}$ increases for $\mathrm{r}<\mathrm{R}$, decreases as $\mathrm{r}$ increases for $\mathrm{r}>\mathrm{R}$
zero as $\mathrm{r}$ increases for $\mathrm{r}<\mathrm{R},$ increases as $\mathrm{r}$ increases for $\mathrm{r}>\mathrm{R}$
decreases as $\mathrm{r}$ increases for $\mathrm{r}<\mathrm{R}$ and for $\mathrm{r}>\mathrm{R}$
A conducting sphere of radius $R = 20$ $cm$ is given a charge $Q = 16\,\mu C$. What is $\overrightarrow E $ at centre
Charges $Q, 2Q$ and $4Q$ are uniformly distributed in three dielectric solid spheres $1,2$ and $3$ of radii $R/2, R$ and $2 R$ respectively, as shown in figure. If magnitudes of the electric fields at point $P$ at a distance $R$ from the centre of spheres $1,2$ and $3$ are $E_1 E_2$ and $E_3$ respectively, then
Electric field intensity at a point in between two parallel sheets with like charges of same surface charge densities $(\sigma )$ is
The electric field at $20 \,cm$ from the centre of a uniformly charged non-conducting sphere of radius $10 \,cm$ is $E$. Then at a distance $5 \,cm$ from the centre it will be
A sphere of radius $R$ has a uniform distribution of electric charge in its volume. At a distance $x$ from its centre, for $x < R$, the electric field is directly proportional to