Im doing a project and my ohms meter is really not working really well. I am testing zinc and copper under different temperatures. One at room, a cold temperature and a hot temperature. How should the conductivity of each metal be ranked under the different temperature. Can you make an apporoximate list. Also im using an ohmsmeter on 20k. If you can can you give me some conductivity measures it should approximatly be.
At this point i have nothing else i can do because this project is due tommorow. So please anything you got please tell.
Thanks
2006-11-29 09:17:59 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Make sure you have a good, solid connection between your sample and your ohmmeter probes. Use a scale on your meter that's appropriate for the resistance you are measuring. If your resistance is 1/2 ohm, then it will read zero on a 0-20Kohm scale, which isn't useful. It will read half-way on a 0-1ohm scale, where you can get a good reading.
The resistance of a sample depends not just on the material and temperature, but also the geometry. The resistance of a uniform wire will be proportional to its length and inversely proportional to its cross-section area.
2006-11-29 11:13:55 · answer #1 · answered by Frank N 7 · 0⤊ 0⤋