Hysteresis can be a difficult concept to understand, but I'll givesome simple examples. There are two kinds of hysteresis. .
One kind, after you make a change to something …and then removethe agent of change the thing does not return to its state beforeyou made the change. If you hang a rubber band from a cuphook, thenhang a weight on the rubber band, when you remove the weight therubber band does not return to the length it was before you addedthe weight -- it's longer. .
The other kind is a lag between when you initiate a change tosomething and when the change occurs. This is a hypotheticalexample and doesn't really occur. Imagine you flip a light switch,but the light doesn't come on until a second later. This lag wouldbe hysteresis. A real example would be difficult to explain andunderstand. (MORE)