Three plates of common surface area $A$ are connected as shown. The effective capacitance will be
$\frac{{{\varepsilon _0}A}}{d}$
$\frac{{{3 \varepsilon _0}A}}{d}$
$\frac{3}{2}\frac{{{\varepsilon _0}A}}{d}$
$\frac{{{2 \varepsilon _0}A}}{d}$
Electric field at a place is $\overrightarrow E = {E_0}\widehat i\,\,V/m$. A particle of charge $+q_0$ moves from point $A$ to $B$ along a circular path find work done in this motion by electric field :-
When a proton is accelerated through $1\,V,$ then its kinetic energy will be........$eV$
A charge $Q$ is distributed over two concentric hollow spheres or radius $r$ and $R(> r)$ such that the surface densities are equal. The potential at the common centre is
In the figure a potential of $+1200\, V$ is given to point $A$ and point $B$ is earthed, what is the potential at the point $P$ ?......$V$
Two spherical conductors each of capacity $C$ are charged to potential $V$ and $-V$ . These are then connected by mean of a fine conducting wire. The loss of energy will be