Internal Resistance

A 'quick and easy' practical which can be extended to a lengthier research project if required. Students can investigate the internal resistances of different types, makes and models, as well as how the internal resistance changes as the cells or batteries become run down. 
Caution should be exercised with rechargeable cells as they can have a very low internal resistance and cause over heating if on low loads.  

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Thomas Carl Pion,
Apr 25, 2015, 1:38 PM
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Thomas Carl Pion,
Apr 25, 2015, 1:38 PM
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Thomas Carl Pion,
Apr 25, 2015, 1:04 PM
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Thomas Carl Pion,
Apr 25, 2015, 1:39 PM
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Thomas Carl Pion,
Apr 25, 2015, 1:16 PM