MadSci Network: Physics

Subject: Electromagnet field strength vs current

Date: Mon Jun 16 08:23:28 2003
Posted by Pete
Grade level: teacher/prof School: Rednock School
City: No city entered. State/Province: No state entered. Country: No country entered.
Area of science: Physics
ID: 1055769808.Ph

A standard experiment is to vary the current through an electromagnet made 
a soft iron core about 8 mm. diameter and 12 cm. long with 100 turns of wire.  
With currents below about 1 amp, there is very little effect (measured by 
counting paperclips picked up or by measuring the force on a soft iron rod)  
Over one amp the relationship is clearly linear.  It is not an effect due to 
the clips or the rod becoming magnetised) Why is this?

Re: Electromagnet field strength vs current

Current Queue | Current Queue for Physics | Physics archives

Try the links in the MadSci Library for more information on Physics.

MadSci Home | Information | Search | Random Knowledge Generator | MadSci Archives | Mad Library | MAD Labs | MAD FAQs | Ask a ? | Join Us! | Help Support MadSci

MadSci Network,
© 1995-2003. All rights reserved.