The four capacitors, each of $25\,\mu F$ are connected as shown in Fig. The $dc$ voltmeter reads $200\,V$. The charge on each plate of capacitor is
$\pm \,2\times 10^{-3}\,C$
$\pm \,5\times 10^{-3}\,C$
$\pm \,2\times 10^{-2}\,C$
$\pm \,5\times 10^{-2}\,C$
In a certain region of space, there exists a uniform electric field of value $2\times10^2\hat k\, Vm^{-1}$. A rectangular coil of dimension $10\, cm\times20\, cm$ is placed in the $xy$ plane. The electric flux through the coil is......$Vm$
If the distance between the plates of a capacitor having capacity $C$ and charge $Q$ is doubled then work done will be
A charge $Q$ is divided into two parts of $q$ and $Q - q$. If the coulomb repulsion between them when they are separated is to be maximum, the ratio of $\frac{Q}{q}$ should be
The electric potential $V$ at any point $(x,y,z)$ in space is given by equation $V = 4x^2\,volt$ where $x, y$ and $z$ are all in metre. The electric field at the point $(1\,m, 0, 2\,m)$ in $V/m$ is
In a hollow spherical shell, potential $(V)$ changes with respect to distance $(s)$ from centre as