PIRA 5H20.00 FORCES ON MAGNETS

DCS #DEMONSTRATIONREFERENCEABSTRACT
5H20.00Forces on Magnets
5H20.10magnets on a pivotPIRA 200One magnet is placed on a pivot, the other is used to attract or repel the first.
5H20.10magnets on a pivot5H20.10A magnet is placed in a cradle. A second magnet is used to attract and repel the first.
5H20.10interaction between bar magnetsEr-2Bar magnets on pivots.
5H20.10magnetic attraction/repulsionDisc 19-01One magnet is placed on a pivot, the other is used to attract or repel the first.
5H20.15snap the lines of forcePIRA 1000
5H20.15snap the lines of force5H20.15
5H20.20levitation magnetsPIRA 500
5H20.20levitation magnets5H20.20Two ring magnets are placed on an upright test tube with like poles facing.
5H20.20levitation of magnetic discsEr-11Two disc magnets are suspended with like poles facing on an inverted test tube.
5H20.21magnetic suspensionEr-10Two notched bar magnets are held with like poles facing.
5H20.23centrally levitating magnetsPIRA 1000
5H20.24linearly levitating magnetsPIRA 1000
5H20.30inverse square lawPIRA 1000
5H20.30inverse square law5H20.30Same as AJP 31(1),60.
5H20.30inverse square law - magnetismAJP 41(12),1332A balance to measure the repulsion of two bar magnets. See AJP 31(1),60.
5H20.30inverse square law - magnetismAJP 31(1),60A balance is made out of a meter stick with a magnet on one end facing the pole of another similar magnet. Adjust the distance between the magnets and slide the counterbalance along the meter stick until equilibrium is reached.
5H20.30magnetic balanceE-86Use a bar magnet brought near a second bar magnet counterweighted and on a knife edge to roughly verify the inverse square law.
5H20.33hanging magnetsE-87Hang two magnets horizontally and parallel. Use the inverse square law to compute the pole strength from the length of the suspension, the saturation, and mass of the magnets.
5H20.35inverse square law balancePIRA 1000
5H20.35inverse square law5H20.35
5H20.35inverse squared power - magnetismAJP 51(11),1023Three simple variations of magnets levitating in a glass tube are used to show a force varying with the inverse of the distance squared.
5H20.40inverse fourth law - dipolesPIRA 1000
5H20.40inverse fourth power - magnetism32-1.2Equipment shows the force between two dipoles varies as the inverse fourth power of the separation. Pictures.
5H20.50inverse seventh law - magnet/ironPIRA 1000
5H20.50inverse seventh power - magnetism32-1.3Apparatus to show the force between a magnet and a piece of soft iron varies with the inverse seventh of the separation. Diagram, Picture.

ReferenceDescription
M-1Sutton
Ma-1Freier & Anderson
M-1dHilton
8-2.8Meiners
1A12.01University of Minnesota Handbook
AJP 52(1),85American Journal of Physics
TPT 15(5),300The Physics Teacher
Disc 01-01The Video Encyclopedia of Physics Demonstrations

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