Magnets
Magnets Demo
Magnets Demo
Merlino Magnets

 

Code Number: 5G10.10

Demo Title: Magnets

Condition: Good

Principle: Magnetic Forces & Fields

Area of Study: Electricity & Magnetism

Equipment: 

Magnets (assorted).

Procedure:

The magnet on the swivel may be used to show a magnetic motor.  The diffusion pump magnets can be strung together and then used to show how breaking a magnet in two creates two magnets.

References:

  • Edward Russell Forringer, "Measuring and Modeling the Force Between Permanent Magnets", TPT, Vol. 60, #7, Oct. 2022, p. 546.
  • Wayne Mark Saslow, "Magnetic Poles: A Missing Manual", TPT, Vol. 60, #7, Oct. 2022, p. 540.
  • Tracy Hood, "A New Direction: How a Compass Pointed The Way to Clearing Up an Attractive Misconception", TPT, Vol. 50, #7, Oct. 2012, p. 398.
  • Peter Froehle, "Quick Way to Float a Paper Clip on Water", TPT, Vol. 46, #2, Feb. 2008, p. 70.
  • Kerry Browne and David P. Jackson, "Simple Experiments to Help Students Understand Magnetic Phenomena", TPT, Vol. 45, #7, Oct. 2007, p. 425.
  • Al Adams, "Spherical Rare-Earth Magnets in Introductory Physics", TPT, Vol. 45, #7, Oct. 2007, p. 409.
  • Michael J. Moloney, "Strong Little Magnets", TPT, Vol. 45, #6, Sept. 2007, p. 352.
  • Lisa E. Gayetsky and Craig L. Caylor, "Measuring the Forces Between Magnetic Dipoles", TPT, Vol. 45, #6, Sept. 2007, p. 348.
  • Ron Edge, "A Simple Diamagnetic Levitation Experiment", TPT, Vol. 41, #2, Feb. 2003, p. 122.
  • John D. McGervey, "Hands-on Physics for Less Than a Dollar per Hand", TPT, Vol. 33, #4, Apr. 1995, p. 238.
  • Evelyn Restivo and H. T. Hudson, "'Iron-Enriched' Cereal-Literally", TPT, Vol. 28, #9, Dec. 1990, p. 608.
  • Robert Chasnov and Louis Overcast, "Magnet Symmetry and Newton's Third Law", TPT, Vol. 28, #2, Feb. 1990, p. 112.
  • Jay Zimmerman and Howard Balfour, "Doing Physics: Dipole Repulsion", TPT, Vol. 25, #7, Oct. 1987, p. 470.
  • Jay Zimmerman and Howard Balfour, "Doing Physics", TPT, Vol. 25, #7, Oct. 1987, p. 469.
  • John W. Ecklin, "More on Magnetic Forces", TPT, Vol. 25, #2, Feb. 1987, p. 73.
  • William Kopp, Arthur Schmidt, and Ed McNeil, "Magnetic Forces", TPT, Vol. 23, #6, Sept. 1985, p. 375.
  • Dwight L. Barr Sr., "There's Still a Lot We Don't Know", TPT, Vol. 14, #9, Dec. 1976, p. 534, also A Potpourri of Physics Teaching Ideas - Electricity and Magnetism, p. 161.
  • Jerry D. Wilson, "A Three-Pole Bar Magnet", TPT, Vol. 14, #6, Sept. 1976, p. 365, also A Potpourri of Physics Teaching Ideas - Electricity and Magnetism, p. 160.
  • Gladys F. Luhman, Arthur R. Quinton, Dean Hartman, and Rod Fisher, "A Magnetic Tripole—What Caused It? ", TPT, Vol. 14, #5, May 1976, p. 261, also A Potpourri of Physics Teaching Ideas - Electricity and Magnetism, p. 159.
  • Liberio Mar and Carlos Hernandez, "Construction of a Simple Compass", TPT, Vol. 14, #4, Apr. 1976, p. 247, also A Potpourri of Physics Teaching Ideas - Electricity and Magnetism, p. 162.
  • Michael Davis, "A Magnetic Tripole", TPT, Vol. 14, #1, Jan. 1976, p. 34, also A Potpourri of Physics Teaching Ideas - Electricity and Magnetism, p. 158.
  • Brother James Mahoney, "The Field Strength of A Permanent Magnet", TPT, Vol. 13, #8, Nov. 1975, p. 507, also A Potpourri of Physics Teaching Ideas - Electricity and Magnetism, p. 168.
  • Walter Thumm, "Questions Some Students Ask... A Question of Magnets and Keepers", TPT, Vol. 10, #8, Nov. 1972, p. 483, also A Potpourri of Physics Teaching Ideas - Electricity and Magnetism, p. 165.
  • Delbert Garrick and Raymond Kunselman, "Magnetic Monopoles", TPT, Vol. 9, #7, Oct. 1971, p. 366.
  • Noel C. Little, "An Oft Forgotten Formula", TPT, Vol. 7, #8, Nov. 1969, p. 452.
  • Walter Thumm, "Why Keepers on Magnets?", TPT, Vol. 6, #1, Jan. 1968, p. 38.
  • Kenneth Brownstein, "Letters on Bar Magnets", AJP, Vol. 55, #1, Jan. 1987, p. 10.
  • Alfred Romer, "Magnetic Repulsion: An Introductory Experiment", AJP, Vol. 41, #12, Dec. 1973, p. 1332.
  • Ian Gilbert, Cristiano Nisoli, and Peter Schiffer, "Frustration by Design", Physics Today, Vol. 69, #7, July 2016, p. 54.
  • C. L. Chien, Frank Q. Zhu, and Jian-Gang Zhu, "Patterned Nanomagnets", Physics Today, Vol. 60, #6, June 2007, p. 40.
  • Roderich Moessner and Arthur P. Ramirez, "Geometrical Frustration", Physics Today, Vol. 59, #2, Feb. 2006, p. 24.
  • "Do Magnets Go Bad? If So, How?", Popular Mechanics, Vol. 192, #5, May 2015, p. 26.
  • A. H., "One Pole to Rule Them All", Popular Mechanics, Vol. 191, #6, June 2014, p. 17.
  • D. Rae Carpenter Jr. and Richard B. Minnix, "B-380. Cereal & Nails (Spoof)", DICK and RAE Physics Demo Notebook, 1993.
  • G. D. Freier and F. J. Anderson, "Er-2", A Demonstration Handbook for Physics.
  • Tik Liem, "Which Pole is Attracted?", Investigation to Science Inquiry, p. 222.
  • Robert J. Reiland, Laboratory Activity 11: "A Model of Magnetic Domains", Teaching About Magnetism, p. 3.38.
  • George M. Hopkins, "Magnetism", Experimental Science, p. 356.
  • George M. Hopkins, Experimental Science, Volume Two, p. 110.
  • Joseph H. Adams, "Magnets and Induction-Coils", Harper's Electricity Book For Boys", p. 54.
  • Vicki Cobb and Kathy Darling, "No Attraction Here", Bet You Can!, p. 39.
  • Janice VanCleave, "15, Temporary", Magnets, p. 60.
  • Janice VanCleave, "7, Swinger", Magnets, p. 28.
  • Janice VanCleave, "4, Get Away", Magnets, p. 16.
  • Janice VanCleave, "1, Stickers", Magnets, p. 4.
  • James D. Livingston, "All Ten Facts about the Force", Driving Force - The Natural Magic of Magnets, p. 119.
  • James D. Livingston, "Permanent Magnet Terminology", Driving Force - The Natural Magic of Magnets, p. 52.
  • Jodi and Roy McCullough, "Magnetism with a Magnetic Sculpture", The Role of Toys in Teaching Physics", p. 4.46.
  • Jodi and Roy McCullough, "Magnetism with Magnetic Marbles", The Role of Toys in Teaching Physics, p. 4.172.
  • Pat Murphy, Ellen Macaulay, and the staff of the Exploratorium, "Magnets", Exploratopia, p. 320.
  • Martin Gardner, "90. The Paper Clip Chain", Smart Science Tricks, p. 133.
  • Martin Gardner, "85. Which is Which?", Smart Science Tricks, p. 126.
  • "The Basics of Magnetism in Action", The Boy Scientist, p. 194.
  • Simon Quellen Field, "Measures Used In Permanent Magnets", Gonzo Gizmos, p. 15 - 17.
  • Christopher P. Jargodzki and Franklin Potter, "191, The Magnet", Mad About Physics, p. 72, 213.
  • Christopher P. Jargodzki and Franklin Potter, "190, Why the Keeper?", Mad About Physics, p. 72, 213.
  • Raymond Bruman, "Magnetic Tightrope", Exploratorium Cookbook I, p. 79.1.
  • Robert Ehrlich, "9.6 - Pushing Disk Magnets on the OHP", Why Toast Lands Jelly-Side Down, p. 151 - 153.
  • Robert Ehrlich, "A Row of Magnetic Marbles on an Incline", Why Toast Lands Jelly-Side Down, p. 54 - 56.
  • Robert Ehrlich, "Magnet Symmetry and Newton's Third Law", Why Toast Lands Jelly-Side Down, p. 35 - 36.
  • Janice VanCleave, "23, Keeper", Janice VanCleave's Physics for Every Kid, p. 54.
  • Bobby Mercer, "No-Touch Race Car", Junk Drawer Physics, p. 149.
  • Sara Stein, "Atom Magnets", The Science Book, p. 239.
  • "The Inverse Square Law in Magnetism", Selective Experiments in Physics, CENCO, 1962.
  • "Magnetic Moment and Magnetic Field Intensity", Selective Experiments in Physics, CENCO, 1962.
  • "Distribution of Magnetic Field Lines of Force Near the Surface of a Bar Magnet", Selective Experiments in Physics, CENCO, 1958.
  • Rudolf F. Graf, "What Will a Magnet Attract?", Safe and Simple Electrical Experiments, p. 42.
  • Rudolf F. Graf, "Like Poles Repel and Unlike Poles Attract", Safe and Simple Electrical Experiments, p. 48.
  • Rudolf F. Graf, "Which Magnet is Stronger", Safe and Simple Electrical Experiments, p. 50.
  • Rudolf F. Graf, "Where is a Magnet the Strongest", Safe and Simple Electrical Experiments, p. 51.
  • Rudolf F. Graf, "Induced and Residual Magnetism", Safe and Simple Electrical Experiments, p. 52.
  • Rudolf F. Graf, "Magnetic Poles Can Be Anywhere", Safe and Simple Electrical Experiments, p. 58.
  • Rudolf F. Graf, "Which One is Magnetized", Safe and Simple Electrical Experiments, p. 63.
  • Rudolf F. Graf, "Rescuing the Paper Clip", Safe and Simple Electrical Experiments, p. 64.
  • Rudolf F. Graf, "Magnetic Separation", Safe and Simple Electrical Experiments, p. 65.
  • Rudolf F. Graf, "Make Floating Magnets", Safe and Simple Electrical Experiments, p. 66.
  • Rudolf F. Graf, "How Steady Are You", Safe and Simple Electrical Experiments, p. 67.
  • Rudolf F. Graf, "Building a Simple Motor", Safe and Simple Electrical Experiments, p. 67.
  • Rudolf F. Graf, "Magnetic Pick-Up Sticks", Safe and Simple Electrical Experiments, p. 72.
  • Herb Strongin, “Investigating the Poles of a Magnet“, Science on a Shoestring, p. 165.
  • Herb Strongin, “Measuring the Strength of a Magnet“, Science on a Shoestring, p. 168.
  • Borislaw Bilash II, “Magnetic Analogy for Bonding Forces“, A Demo A Day – A Year of Physical Science Demonstrations, p. 121.
  • Borislaw Bilash II, “North or South?“, A Demo A Day – A Year of Physical Science Demonstrations, p. 289.
  • Borislaw Bilash II, “Distance Makes It Less Fonder“, A Demo A Day – A Year of Physical Science Demonstrations, p. 295.
  • Julius Sumner Miller, Q177 & A177, Millergrams II – Some More Enchanting Questions for Enquiring Minds, p. 45 & 100.
  • Julius Sumner Miller, Q187 & A187, Millergrams II – Some More Enchanting Questions for Enquiring Minds, p. 51 & 103.
  • Forrest M. Mims III, "Temporary Magnets, Permanent Magnets, Using and Caring for Magnets", Vol. III - Electronic Sensor Circuits & Projects, p. 60.

Video Credit: Jonathan M. Sullivan-Wood

5G10.10 - Magnets