Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

When Current passes thru a spring , some books mention that it gets compressed. However, I think due to the heating effect of current, molecules will increase kinetic energy and the spring should get elongated. What is the physical mechanism for the compression instead of elongation?

share|cite|improve this question
I found d answer ... Its like this There exists Heating Effect .. but its olmost neglible 2 d compression wic h takes place Consider a spring .. which actli is like circular loop of many turns Since , current will flow in same direction , even Directn of magnetic field too will be same Thus .. Dipole will b created on each loop n dey will attract each oder – Nevil Oct 21 '12 at 15:58
@user You are encouraged to answer your own questions for the benefit of future visitors and so that other user can vote on the answer that you have found. – dmckee Oct 22 '12 at 15:38

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.