Question 1:

A parallel-plate capacitor has a plate separation of 0.9 mm and a charge of magnitude 0.03 MC on each plate. If the electric field between the plates is 6 x 105 V/m, find: a) the capacitance; UF b) the energy stored.Two capacitors, C1 = 2 /F and C2 = 9 F, are connected in series with a 20 V battery. The battery is removed and the plates of like sign are connected. Find the initial and final energies for each capacitor. Initial energy on C1 Initial energy on C2 J Final energy on C1 J Final energy on C2