TS EAMCET 19-July-2022 Shift 1 Solved Paper

A parallel - plate capacitor of plate area 10cm2 and plate separation 3mm is charged to a potential difference 12V and then the battery is disconnected. A slab of dielectric constant 3 is then inserted between the plates. The work done on the system in the process of inserting the slab is αε0. The value of α is
(Take ε0 as the permittivity of free space)