Electrostatic field of a long uniformly charged wire varies with distance $(r)$ according to relation
$E \propto r$
$E \propto \frac{1}{r}$
$E \propto \frac{1}{r^2}$
$E \propto \frac{1}{r^3}$
In the given circuit if point $C$ is connected to the earth and a potential of $+2000\,V$ is given to the point $A$ , the potential of $B$ is.....$V$
Five indentical capacitor plates, each of area $A,$ are arranged such that adjacent plates are at distance $d$ apart. The plates are connected to a source of $emf$ $V$ as shown in fig. Then the charges $1$ and $4$ are, respectively :-
A particle of mass $m$ and charge $q$ is placed at rest in a uniform electric field $E$ and then released. The $KE$ attained by the particle after moving a distance $y$ is
The energy stored in the capacitor is $'U'$. If an uncharged capacitor of same capacity is connected in parallel with it, then energy stored in each capacitor is
The conducting spherical shells shown in the figure are connected by a conductor. The capacitance of the system is