Calculating Optimal Capacitor Charge for Energy Storage

[csimon863]

Homework Statement

To what potential should you charge a 1.0 micro(u)F capacitor to store 1.0 J of energy?

Homework Equations

Uc = 1/2C (Vc)squared

The Attempt at a Solution

1/2 CV^2 so V=SQR(2E/C)=SQR(2/1E^-6)=.004 V

This isn't right though. Any help??

 

[Matterwave]

It seems you have taken the wrong square root...sqrt(2/1E-6) is definitely NOT .004.

2/1E-6 = 2E6 so the sqrt(2E6) is...?