Tag - magnetic fields

Lab #36.2 Magnetism: Seeing Magnetic Fields

Purpose
In this activity, students will explore the patterns of magnetic fields around bar magnets in various configurations.
Discussion
A magnetic field is a kind of aura that surrounds magnets. Although it can’t be seen directly, the overall shape of the field can be seen by the effect it has on iron filings.

Required Equipment
3 bar magnets, iron filings and paper or a magnetic field protectoral (iron filings suspended in oil encased in an acrylic envelope)

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Student Worksheet   Teacher Notes

Alnico Bar Magnets Pair

In Stock SKU: P8-1127
$17.00

Iron Filings

In Stock SKU: GI-0210-1
$9.50

Iron Filings Saver

In Stock SKU: P8-1145
$12.00

Magnetic Field Viewer

In Stock SKU: P8-1152
$2.95

Magnetic Field Viewer Film 9 x 7.2 inch

In Stock SKU: P8-1153
$24.00
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Electric Currents and Fields

Students will observe that the magnetic field created by a coil of wire is perpendicular to the plane of the coil. They will also see that the field is stronger with more current, and that the field reverses direction when the current reverses.

Required Equipment
Genecon, Electric Current and Fields Kit

Acknowledgements: Thank you to Merrill Falk for his work in developing this lab. Merrill is an award-winning high school physics teacher at Milan High School in Michigan and author of the Genecon Experiment Manual.

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Genecon Hand Crank Generator

In Stock SKU: P6-2631
$41.00

Electrical Current and Field Kit

In Stock SKU: P8-8008
$9.00
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Magnetic Fields around Magnets

Students will make observations of bar and horseshoe magnets, using iron filings or magnetic chips to map the field. The filings will be close together where the field is strong, and farther apart where it is weak. Lines will form, following the lines of the field, from the north pole to the south. 
Required Equipment
Bar Magnets, Horseshoe Magnet, Magnetic Chips, Transparency Sheets
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Steel Horseshoe Magnet with Keeper

In Stock SKU: P8-1128
$3.95

Magnetic Chips 50g/vial

In Stock SKU: P8-1140
$12.00

Pair of Steel Bar Magnets

In Stock SKU: P8-1125
$5.90
The “Transparent Sheets” required for this lab is readily available at your office or school supply store. Each lab group would need one sheet.

 

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Magnetic Fields Inquiry

Simple instruments to explore sound and frequency.

We will explore magnetic field configurations and field strengths for permanent magnets in this inquiry exercise. Students will observe the curved field lines around a permanent magnet, and explore how field strength varies with distance. They will observe the magnetic field created by a current-carrying wire, as well as the current created in a wire when a magnet moves past it.

Required Equipment
Bar Magnet Pair, Compass, D Battery 2/pk, Battery Holder, Magnet Wire, Lenz’s Law Apparatus, Magnetic Field Viewer Paper, Plastic Tube, Galvanometer, Ruler, Poster Board.

Acknowledgements: Thank you to Dr. J.R. Harkay author of Phenomenal Physics for providing this student inquiry activity. Adapted from “Tesla’s Domain: Magnetic Fields,” an Inquiry Exercise by J. R. Harkay. Seewww.PhenomenalPhysics.com for more information on the complete Guided Inquiry Curriculum.

Dr. Russell Harkay
Keene State College
New Hampshire
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