Find the equivalent capacitance across $A$ $\&$ $B$ ........$\mu f$
$\frac{{28}}{3}$
$7.5$
$15$
none
Two similar tiny balls of mass $m$, each carrying charge $q$ are hung from silk thread of length $l$ as shown in Fig. These are separated by a distance $x$ and angle $2 \theta \sim 10$. Then for equilibrium :-
What is the effective capacitance between points $X$ and $Y$ ?......$\mu F$
The electric potential $V$ at any point $O$ ($x, y, z$ all in metre) in space is given by $V=4x^2\, volt$. The electric field at the point $(1\,m, 0, 2\,m)$ in $volt/meter$ is
If there are $n$ capacitors in parallel connected to $V \,volt$ source, then the energy stored is equal to
A charge $q$ is placed at the centre of cubical box of side a with top open. The flux of the electric field through one of the surface of the cubical box is