to the plate plane air capacitor applied potential difference U = 500V in the area of the plates with a = 200 cm square, the distance between d1 = 1,5 mm.
plates moved apart to a distance d2 = 15mm.
find the energy E1 and E2 of the capacitor before and after motion plates, if the source of EMF to motion:
1) switched off, and 2) does not turn off. (1) E1 = 14,8 mJ, E2 = 148mkdzh;
2) E1 = 14,8 mJ: E2 = 1,48 mJ,,,,,please help my home work!!!

Question

to the plate plane air capacitor applied potential difference U = 500V in the area of ​​the plates with a = 200 cm square, the distance between d1 = 1,5 mm.
plates moved apart to a distance d2 = 15mm.
find the energy E1 and E2 of the capacitor before and after motion plates, if the source of EMF to motion:
1) switched off, and 2) does not turn off. (1) E1 = 14,8 mJ, E2 = 148mkdzh;
2) E1 = 14,8 mJ: E2 = 1,48 mJ,,,,,please help my home work!!!