A series arrangement of three capacitors of value 8uf,12uf and24uf is connected in series with a90v battery. Calculate the effective capacitance in the circuit and the energy stored in the capacitor.
1/C = 1/8 + 1/12 + 1/24
C = 4µf
E = 1/2 CV^2 = 1/2 * 4*10^-6 * 90^2 = 0.0162 J