# What is the energy stored in the capacitor for dc operation?

#### hsilver

Joined Sep 6, 2016
6

#### AlbertHall

Joined Jun 4, 2014
12,156
Have you calculated any voltages in that circuit?

#### MrAl

Joined Jun 17, 2014
9,540
Have you calculated any voltages in that circuit?

Hi there,

Yeah good idea. Calculate the voltage across the cap and then you can calculate the energy from just that.

#### crutschow

Joined Mar 14, 2008
30,781
Do you know the equation for the energy stored on a capacitor versus its voltage?

#### hsilver

Joined Sep 6, 2016
6
I found the thevenin equivalent circuit across the capacitor (I am assuming that I did it right), but I dont know how to calculate the energy stored. My Vth = 8.57V and Rth = 2.14 ohms

#### crutschow

Joined Mar 14, 2008
30,781
................ but I dont know how to calculate the energy stored. My Vth = 8.57V and Rth = 2.14 ohms
Here's some info on that.

#### dannyf

Joined Sep 13, 2015
2,197
all you need is to get the voltage over the 6R resistor.

To do that, do a conversion of 8v+2ohm into a 4amp//2ohm current source. Everything is elementary after that.