Abstract
Three variants of the rotational viscometer employing a dc motor are considered. The viscometers are highly suitable for liquids of high viscosity, such as glycerol or oils (that is, for η in the range 10-1000 mPa s). The set-ups are very simple and can serve as a first step to designing devices that are more complicated. Experimentation with the electrical motors used in the viscometers provides a deeper understanding of some of the fundamental laws of electricity and magnetism (Lorentz's force, Faraday's law of electromagnetic induction, and Lenz's law).
| Original language | English |
|---|---|
| Pages (from-to) | 622-628 |
| Number of pages | 7 |
| Journal | Physics Education |
| Volume | 45 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 2010 |