As shown in figure, a dielectric substance of dielectric constant $\mathrm{K}$ is inserted in half of the portion between the plates of a parallel-plate capacitor. If its initial capacitance is $\mathrm{C},$ then what will be the new capacitance?

In a camera-flash circuit, a$2000 \mathrm{\mu F}$ Capacitor is charged by a$1.5 \mathrm{V}$Cell. When a flash is required, the energy stored in the capacitor is discharged by means of a trigger.$\mathrm{T}$ Through a discharge tube $\mathrm{D}$ in $0.1$Millisecond. Find the energy stored in the capacitor and the power of the flash.