The equivalent capacitance of the system of capacitors between $A$ and $B$ as shown in the figure
$\frac{7}{6}\,C$
$1.6\, C$
$C$
None
A charge $Q$ is distributed over two concentric conducting thin spherical shells radii $r$ and $R$ $( R > r ) .$ If the surface charge densities on the two shells are equal, the electric potential at the common centre is
Angle between equipotential surface and lines of force is.......$^o$
Find capacitance across $AB$
A point charge $+Q$ is positioned at the centren of the base of a square pyramid as shown. The flux through one of the four identical upper faces of the pyramid is
A parallel plate capacitor has a uniform electric field $E$ in the space between the plates. If the distance between the plates is $d$ and area of each plate is $A$ , the energy stored in the capacitor is