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How the resistance of a thermister is affected by different temperatures.
Member rating: No Rating | Words: | Submitted: Thu Sep 25 2003
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How the resistance of a thermister is affected by different temperatures Aim To investigate whether different temperatures effect the resistance of a themister. Prediction I predict that when the temperature of water is higher the voltage becomes larger but the milliamps become lower as temperature increases I believe this because thermisters are semi conductors this means the resistance of the material gets less as it gets hotter. Because a temperature is usually made from a material which is a good electrical conductor when it is hot. The material gives energy to electrons that are usually trapped in an atom. The electrons are free to move allowing more charge to travel through the material. Diagram + Apparatus -Lab pack -Crocodile clips/leads -Kettle -250ml beaker ~Set in a circuit~ -Thermometer -Thermister -Ammeter -Multimetre Preliminary results 50ml of water TEMPERATURE CURRENT (MA) VOLTAGE (V) 80c 40.1 1.41 70c 31.5 1.43 60c 23.5 1.50 50c 14.5 1.56 40c 8.8 1.60 30c 8.1 1.63 Method First of all I will set up the experiment the way I have shown in the diagram I will...
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