How the resistance of a thermister is affected by different temperatures.

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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.

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Diagram + Apparatus

-Lab pack

-Crocodile clips/leads

-Kettle

-250ml beaker

~Set in a circuit~

-Thermometer

-Thermister

-Ammeter

-Multimetre

Preliminary results  

50ml of water

Method

First of all I will set up the experiment the way I have shown in the diagram I will pour 100ml of water into a beaker.  I will do this 6 times to do 6 different temperatures 80c, 70c, 60c, 50c, 40c and 30 I will take my readings from the ammeter to give me the current readings and from the volt meter ...

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