In above problem if foil is connected to any one plate of capacitor by means of conducting wire then capacitance of capacitor becomes -

If the plates of a capacitor are joined together by as conducting wire, then its capacitance

If the plates of a capacitor are joined together by as conducting wire, then its capacitance

A sheet of aluminium foil of negligible thickness is placed between the plates of a capacitor of capacitance C as shown in the figure then capacitance of capacitor becomes

A metal foil of negligible thickness is introduced between the two plates of a capacitor at the centre. The capacitance of capacitor will be

A metal foil of negligible thickness is introduced between the two plates of a capacitor at the centre. The capacitance of capacitor will be