Electric field at a point varies as $r^o$ for
An electric dipole
A point charge
A plane infinite sheet of charge
A line charge of infinite length
In the figure shown, the potential difference between points $A$ and $B$ is......$V$
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 charge $2\,\mu C$ is taken from infinity to a point in an electric field, without changing its velocity. If work done against forces is $20\,\mu J$ then potential at that point will be.....$V$
Electric potential at an equatorial point of a small dipole with dipole moment $P$ ( $r$ , distance from the dipole) is
An electric dipole is situated in an electric field of uniform intensity $E$ whose dipole moment is $p$ and moment of inertia is $I$. If the dipole is displaced slightly from the equilibrium position, then the angular frequency of its oscillations is