Search Demonstrations

search in
Demonstrations by Category:
TSG home page

Welcome to The MIT Department of Physics Technical Services Group website.

About TSG
The Technical Services Group (TSG) at MIT's Department of Physics provides technical and teaching support for undergraduate courses at MIT. Our many rooms of physics demos, accumulated over the past century, display subtle physics concepts ranging from electromagnetism, to kinematics, to optics.

The undergraduate physics courses at MIT include lecture courses, as well as the Technology Enabled Active Learning (TEAL) studio classroom courses. For more information on the MIT Department of Physics visit their website, or see MIT OpenCourseWare to download free course materials.

We provide support for most variants of 8.01, 8.02 and 8.03 classes in the form of:

  • Demonstration setup, execution and breakdown

  • Laboratory setup, execution and breakdown

  • TEAL classroom teaching assistance

  • General TEAL room support and maintenance

Additionally we occasionally provide some of the above services for departmental open houses, graduations and other special events.

Random Cool Demonstration!

Rotating "B" Field Motor (3 Phase) (H 27)

Keyword: Electric Motors
A toroid with three different windings is connected to 220 VAC 3 phase. A simple induction motor is first demonstrated by placing an aluminum egg in the rotating magnetic field created by the 3 phase currents. The same procedure is used for a metal ring. By using a strobe, the speed of rotation of the ring can be determined. A ring with a cut through its radius is unable to rotate. A board can be placed over the rotating magnetic field and small magnets placed on the board. It can then be seen that the field is changing since the magnets jump up and down on the board.