Polar molecules are the molecules:
having zero dipole moment.
acquire a dipole moment only in the presence of electric field due to displacement of charges.
acquire a dipole moment only when magnetic field is absent.
having a permanent electric dipole moment.
In the adjoining figure, capacitor $(1)$ and $(2)$ have a capacitance $‘C’$ each. When the dielectric of dielectric consatnt $K$ is inserted between the plates of one of the capacitor, the total charge flowing through battery is
A parallel plate capacitor is charged to a potential difference of $100\,V$ and disconnected from the source of $emf$ . A slab of dielectric is then inserted between the plates. Which of the following three quantities change?
$(i)$ The potential difference
$(ii)$ The capacitance
$(iii)$ The charge on the plates
A capacitor is charged by using a battery which is then disconnected. A dielectric slab is then slipped between the plates, which results in
After charging a capacitor the battery is removed. Now by placing a dielectric slab between the plates :-
An uncharged parallel plate capacitor having a dielectric of constant $K$ is connected to a similar air-cored parallel capacitor charged to a potential $V$. The two share the charge and the common potential is $V'$. The dielectric constant $K$ is