Developed by NASA Scientist Steve Papell in the 1960’s, Ferrofluid is a colloidal liquid made of paramagnetic nano particles. When subjected to a magnetic field, the nanoparticles form regular patterns of peaks and valleys.
For an interesting list of modern applications see:https://en.wikipedia.org/wiki/Ferrofluid
- Located in L01, section B-2 (in bin with iron filings)
Demonstrate Magnetic force on current carrying wire.
- Neodymium magnet- L35, section E2.
- Wire: Section E3
- Ring Stand: Section A4
- Battery: Electronics Shop.
Note: Blue wire is taped to pencil (with masking tape) for stability.
Clip-clip leads connect battery to wire.
Purpose: Demonstrate the magnetic deflection of an electron
- Crookes tube contains a white screen that fluoresces green when electrons collides with it. High voltage applied across the anode and cathode accelerate electrons through tube. Electron beam can be deflected using magnetic field of bar magnet.
ALWAYS USE THE MINIMUM VOLTAGE AND CURRENT NECESSARY TO OPERATE CROOKES TUBE.
- Crookes Tube: L01, section B3
- Kilovolt Power Supply: L01, section A1
- Magnet: L01, section B2
- Cables: L01, or L35 (hanging on wall)