A 12.0-V battery is connected to a capacitor, resulting in 54.0 μC of charge stored on the capacitor. How much energy is stored in the capacitor?
The Attempt at a Solution
At first this problem looks to be easy for me but somehow I get a complete different answer than the back of the book.
I plugged in all the variables and solved and got 3.88 x 10^-4 J
The answer I get in the back of the book is 3.24 x 10^-4 J
Can someone please explain to me what I am doing wrong?