Question

What is hysteresis loss?
Define retentively and coactivity.

Answer 1

.

Answer 2

i dont know what those terms are :(

Answer 3

Look up transformer core losses.

Answer 4

hmm....
can anyone give me a link to refer these

Answer 5

This may be a good place to start your research.
http://www.electrical4u.com/hysteresis-eddy-current-iron-or-core-losses-and-copper-loss-in-transformer/

Answer 6

The term "retentivity" is a term to describe the ability to retain magnetism in iron. Use the Google search engine and I believe you can get a fairly good understanding of the terms. I am not sure, but I would guess you are presently studying magnetic effect in cores of transformers, inductors etc. Good luck with your studies.