When a conducting slab fills the space between the two plates of a capacitor, its capacitance

The potentials of two plates of a capacitor are $+10 \mathrm{V}$ and $-10 \mathrm{V}$. The charge on one of the plates is $40 \mathrm{C}$. The capacitance of the capacitor is

A parallel plate capacitor is charged by connecting its plates to the terminal of a battery. The battery remains connected and a glass plate is interposed between the plates of the capacitor, then:

A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved closer by means of insulating handles, then

A parallel plate capacitor with air between the plates has a capacitance of $8 \mathrm{pF}$. The separation between the plates is now reduced by half and the space between them is filled with medium of dielectric constant $5$. The value of capacitance of a capacitor in the second case is

The capacity of the conductor does not depend upon

The outer sphere of a spherical air capacitor is earthed. For increasing its capacitance,

A parallel plate capacitor is charged and then disconnected from the charging battery. If the plates are now moved farther apart by pulling them by means of insulating handles, then