In the circuit above The potential across each ... - JAMB Physics 1999 Question

In the circuit above, The potential across each capacitor is 100V. The total energy stored in the two capacitors is

Energy stored in a capacitor is given by

E = ¹/₂CV²

But effective capacitance for the parallel arrangement is given by

C = C₁ + C₂

= 2 + 3

= 5μF = 5 x 10^-6 x (100)²

∴E = ¹/₂CV²

= ¹/₂ x 5 x 10^-6 x 10⁴

2.9 x 10^-2J