# 5. Energy of a Capacitor in the Presence of a Dielectric

1. Feb 6, 2008

### laterrel

1. The problem statement, all variables and given/known data
A dielectric-filled parallel-plate capacitor has plate area of 25.0 cm^2 and plate separation of 9.00 mm. The capacitor is connected to a battery that creates a constant voltage of 7.50 V. The dielectric constant is 2.00. Throughout the problem, use 8.85×10−12 C^2/N \cdot m^2

2. Relevant equations
U=1/2C*V^2
C=$$\epsilon$$A/d
C=K*C_0

3. The attempt at a solution

2.07×10^−10
Keep in mind that the area of each portion of the capacitor is half that of the original capacitor.