- #1

sawer

- 65

- 2

1. ##U = -\vec \mu \cdot \vec B##

2. ##U = \frac{1}{2} \int \mathbf{A} \cdot \mathbf{J} \, \mathrm{d}V##

- I have searched for the second equation, only can find some information in one web site. Do you know what their names are and differences?

- I see that second energy equation is derived from magnetic vector potential. But for the first equation, which potential equation is it derived from? Is it magnetic scalar potential?