Temperature Dependence of Resistance - Iron Wire and Flame

 

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 Code Number :   5D20.20  

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Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

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Condition :   Excellent   
Principle :   Temperature vs. Resistance  
Area of Study :  Electricity & Magnetism  
Equipment :   Unit with iron wire wrapped around the spacers with the burner underneath and a light bulb, 6V battery, grill lighter.

  
Procedure :   Plug the 6 V battery into the iron wire and burner unit and observe the brightness of the light bulb.  Start the burner and as the iron wire gets hot you will see the light bulb dim and go out.  Turn off the flame and bulb will again glow visibly as the wire cools.
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Mail Questions and Comments to:  Dale Stille