Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

Simple question. But I was wondering, does my mac power cord create a magnetic field when its all coiled?

share|improve this question
1  
Have a look at carexcanada.ca/en/magnetic_fields. The DC part of the cord, after the transformer will have a unidirectional magnetic field. The ac one a varying sinusoidally field which will eventually produce electromagnetic radiation at 50 or 60 Herz –  anna v Feb 13 '13 at 16:45
    
Hi Anna, for me this is a fantastic response, the detail is much appreciated, many thanks. I am however unsure how to mark this as the accepted answer as its a comment. –  iancrowther Feb 15 '13 at 10:06

1 Answer 1

up vote 2 down vote accepted
  1. It doesn't have to be coiled. Magnetic fields will be created as long as you have a current through a wire.

  2. Coiling may make the field strength stronger.

  3. How strong the field strength is in practice also depends on the current through the wire and whether your power cable has shielding.

share|improve this answer

Your Answer

 
discard

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

Not the answer you're looking for? Browse other questions tagged or ask your own question.