Electric field at a place is $\vec E = {E_0}\hat i\,V/m$. 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
$\sqrt 2 \,{q_0}a{E_0}$
$\frac{{{q_0}a{E_0}}}{{\sqrt 2 }}$
${q_0}a{E_0}$
$2{q_0}{E_0}a$
Three capacitors $1, 2$ and $4\,\mu F$ are connected in series to a $10\, volts$ source. The charge on the plates of middle capacitor is
The equivalent capacitance between $A$ and $B$ is (in $\mu\, F$)
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 :-
Which of the following is a volt :
Figures below show regular hexagons, with charges at the vertices, In which of the following cases the electric field at the centre is not zero.