# Hysteresis loop

1. Feb 7, 2005

hello...

At first, I think I have to make it clear to you that I suck at physics and my major in college is digital/media technology, and in Finland, we must have engineering physics passed to graduate. It's been over 2 years since I read physics and I still have those 'chapter 13' exercises undone. (what a coincidence that it's chapter '13')

Anyway, I have particularly one exercise that's way too hard for me. It goes like this...

'Prove that hysteresis loop's area unit is J/m3, which is energy per volume unit'

I have no idea where to start and how to proceed. I'm more like a graphic designer not a physics laboratory assistant. I hope you still could help with this. I made a search and found one, but I'm not sure if it solves my problem, and I really didn't understand it.

$$[w]_{SI}=_{SI}\cdot[H]_{SI}=TA/m=\frac{N}{Am} \cdot \frac{A}{m}=\frac{N}{m^2}=\frac{J}{m^3}$$
($$1 J=1 N \cdot m$$)