Magnetic Field - Eme Set - Solenoids

Purpose

To visualize the magnetic field around a solenoid.
 

Equipment

EME magnetic field apparatus with battery electric current source on overhead projector.◙

 

Suggestions

This is a portable version; a better choice in Physics classrooms is J5-16: MAGNETIC FIELD AROUND◙WIRE, LOOP, SOLENOID.
 

Images

j5-13

Description

Solenoids of three and seven turns respectively are wound through a plastic sheet. The magnetic field around either solenoid can be visualized by sprinkling iron filings in the area around where the solenoid passes through a plastic sheet which is positioned on an overhead projector. Alternatively, small compasses can be arranged within and around the solenoids.◙
 

References

E.M.E. Electromagnetism Series, Teacher's Guide, Unit 4: Solenoids. ◙A. G. Klein, On demonstrations of Ampere's law, AJP 61, 1045 (1993).