Phys 4, Section
2
Feb 1, 2002
Energy Storage in Capacitors
V = Q/C and dW = v dq = q dq/C. So the work W to
charge a capacitor C to Q is
Electric Field Energy
If the work done in charging the capacitor is viewed as producing
energy, this energy can be seen as stored in the capacitor (U = CV^{2}/2)
or in the electric field. If the energy U is divided by the volume Ad
of space between the capacitor plates, then the space can be considered to
have an energy density u given by
Last modified on February 05, 2002
