Ferrofluid and Magnet Demo
Ferrofluid and Magnet Demo
Ferrofluid and Magnet Demo
Ferrofluid and Magnet Demo
Magnetic Slime
Magnetic Slime and Magnet
Ferrofluid and Magnet Demo
Ferrofluid and Magnet Demo
Ferrofluid and Magnet Demo

 

Code Number: 5H10.31

Demo Title: Ferromagnetic Fluids

Condition: Good

Principle: Magnetic Forces & Field Lines

Area of Study: Electricity & Magnetism

Equipment: 

Magnets assorted, EFH1 Ferrofluid, Ferrofluid Preform Cell.

Procedure:

Bring a magnet close to the preform cell and watch the fluid line up with the field lines.

Pour a small amount of the EFH1 fluid into a watch glass and bring a magnet close to the underside of the glass.  Depending upon the type of magnet different field line configurations can be shown.

Sandwich a plastic petri dish between the magnet and the bolt head.  Screw the nut on the bolt so that a quarter inch of the bolt end protrudes above the nut.  With a pipette add ferrofluid to the top of the bolt and the nut until the desired magnetic field pattern is produced.

References:

  • Zoe Boekelheide, "Elongation of a Ferrofluid Droplet Near a Permanent Magnet: A Tidal or Magnetic Energy Effect?", AJP, Vol. 92, #10, Oct. 2024, p. 752.
  • Bruce J. Ackerson, Anitra N. Novy, "Forces in Complex Fluids", AJP, Vol. 69, # 5, p. 614, May 2001.
  • Daniel J. Klingenberg,  "Making Fluids into Solids with Magnets",  The Amateur Scientist, 8/1/01.
  • James E. Martin, Kyle J Solis, "Mesmerizing Magnetic Fields", Physics Today, Aug. 2015, p. 66.
  • J. V. I. Timonen et al., "A Model System for Dynamic Self-Assembly, Physics Today, August 2013, p. 68.
  • "Peaks and Labyrinths in a Magnetic Fluid", Physics Today, June 2008, p. 21.
  • Borislaw Bilash II, David Maiullo, "Let's See the Lines", A Demo a Day: A Year of Physics Demonstrations, p. 290.
  • Arthur B. Ellis, Margret J. Geselbracht, Brian J. Johnson, George C. Lisensky, William R. Robinson,  "Ferrofluids",  Teaching General Chemistry - A Materials Science Companion,  p. 36.
  • "Instruction Booklet & Experiment Guide", Ferrofluidics Corporation, 1999.
  • Lab 3: Observation of the Unusual Properties of Ferrofluids,"  California Institute of Technology-Department of Materials Science, MS 90, Spring '01.
  • Xubo Liu et al., "Reconfigurable Ferromagnetic Liquid Droplets", Science, Vol. 365, #6450, July 2019, p. 264-267.