gasman pete wrote:

Ohm's Law
http://www.grc.nasa.gov/WWW/K-12/Sam...w/ohmslaw.html

Nice to keep for further reference

pete

yes. But wise to realise Ohm's law is not a law, and many diy type
resistances change their R greatly depending on temp, thus making ohms
law calcs out by anything upto a factor of 10. This applies
particularly to light bulbs and some heating elephants.


NT