**1. The problem statement, all variables and given/known data**

A parallel-plate capacitor with plates of area (0.5m) * (1m) has a distance separation of 2 [cm] and a voltage difference of V = 200 [V], as shown in Fig.

a) Find the energy stored

b) keep d1 = 2 [cm] and the voltage difference V, while increasing d2 = 2.2 [cm]. Find the energy stored (hint hint u=1/2CV^2)

**2. Relevant equations**

**3. The attempt at a solution**

http://ift.tt/1jI3G1c