Temperature co-efficient of resistance, Physics

The temperature co-efficient of resistance:

The temperature co-efficient of resistance is defined as;

          The Fractional change in resistance from 0ºC, per degree temperature change.

and may be represented graphically as shown below.

The graph is reasonably linear for many materials over a moderate temperature range (0º - 200ºC).

The units are ºC because the ohms cancel out in the calculation.

Materials whose resistance increases with increasing temperature have a positive temperature co-efficient of resistance.

Materials whose resistance decreases with increasing temperature have a negative temperature co-efficient of resistance.

2046_TEMPERATURE CO-EFFICIENT OF RESISTANCE.png

Some materials have very small temperature co-efficients of resistance and are used where it is important that the resistance does not change with temperature.  Examples are Manganin and Eureka.

 

 

 

Posted Date: 9/13/2012 3:03:11 AM | Location : United States







Related Discussions:- Temperature co-efficient of resistance, Assignment Help, Ask Question on Temperature co-efficient of resistance, Get Answer, Expert's Help, Temperature co-efficient of resistance Discussions

Write discussion on Temperature co-efficient of resistance
Your posts are moderated
Related Questions
In a Wheatstone bridge ABCD, a galvanometer is connected between A and C, and a battery among B and D. A resistor of unknown value is connected among A and B. When the bridg

tell me in detail about inkjet printer???

In this type of capacitors the dielectric consists of one or more layer of extremely thin craft paper which looks very much like cigarette paper. The metal plates consist of alumin

derivation by calculas method of Snth = (Sn – Sn -1) = u + a/2 (2n – 1)


Particle function: Protons The number of protons in an atom determines the kind of material: Eg. Hydrogen 1 proton Helium 2 protons Lithium 3 protons B

The earth’s magnetic field: The earth acts as a magnet and the lines of force produced by it follow the pattern shown in the diagram below. If the Earth were completely symm



Research the topic of RLC circuits with AC sources. Explain what is given in a general problem involving a circuit and what is asked for. Explain the terms which comprise an RLC ci