The area of each plate of parallel plate air capacitor is 150 cm2. The distance between its plates is 0.8 mm. It is charged to a pot. Difference of 1200 volt. What will be its energy? What will be the energy when it is filled with a medium of K = 3 and then charged. If it is charged first as an air capacitor and then filled with this dielectric, what will happen to energy?
