JEE Mains 27-July-2022 Shift 2 Solved Paper

A parallel plate capacitor with width 4‌cm, length 8‌cm and separation between the plates of 4‌mm is connected to a battery of 20V. A dielectric slab of dielectric constant 5 having length 1‌cm, width 4‌cm and thickness 4‌mm is inserted between the plates of parallel plate capacitor. The electrostatic energy of this system will be _______ E0J. (Where E0 is the permittivity of free space)