Menu
  • call
  • chat
  • call
Header Add 1

Header Add 1

User Submissions

This corner of site is dedicated to the data submitted by users. The data submission does'nt requires registeration & is absoulutely free. The submission can be anything from articles to still images related to science & technology.

Note* The data in this corner is all user submitted data and Physicsatweb.com is not responsible for contents. Although in-case of copyright infringment, the originall copyright holder of content can report the url to the admins for removal of content, by following the link given at the bottom of page "Report Contents".

 
Quick Navigation
 
Eddy currents or Foucault currents and loss of energy Do you know what is the origin of magnetism?
Changes in IGCSE Physics Syllabus (0625) from 2016 onward What is human reaction time?
Tony Blair on Genetically Modified Food Debate World's Fastest Animal
Uses of superconductors Superconductivity
 
Previous Load Next
Post Your Submission
 

Eddy currents or Foucault currents and loss of energy

Date : 19/09/15 06:15 PM

When a varying magnetic field passes through a solid mass of conducting material, induced currents are produced within the material in a manner simmilar to that by which currents are induced in straight wire conductor or coil. These currents are called eddy currents. These currents circulate in a closed loops within the conductiing material and heat produces in the material. 

In most electrical devices, the heating effect produced by the flow of electric currents results in a waste of energy. To minimise this, a solid mass of a conducting material which lies within the changing magnetic field, is usually replaced by laminated pieces of the same material. Each layer of material is insulated from the next by a thin coating of enamal so that a very high resistance is offered to currents that may be produced within the block of material as a whole. In this way, the circulation of eddy currents is restricted, and the loss of energy minimised. 

It is to reduce eddy current that a bundle of insulated soft-iron wires is used in the induction coil and a laminated iron core for the transformer.

 

 
No files Attached By : Rifaqat Ali Minhas
 
Add Comment |Submit | Report Error| FAQs | | Share on Twitter
 
View Comments on this Submission - Total Comments (0)
No comments
footer 1

   
Footer Add 1

    Footer Add 2

Signup for our Newsletter

About us:

A team of committed professionals providing online resources of physics for the learners of IGCSE/AS/ A Level .....

footer-image