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A good explanation of electrical resistance, why it exists and the variables that affect it including wire length, width and material.
Interactively explore the timeline of the universe.
An activity to do at home to explore the world of circuits. Make two types of dough, one that carries electricity and one that doesn't, to create all sorts of circuits and explore how they work.
Good revision site aimed at UK A Level standard covering resistance, ohm's law, conductivity etc
Definition and links to related information on electrical resistance.
A useful animation to demonstrate the free electron model of current flow, showing electrical resistance in the copper wire of a lightbulb.
Various applets allowing results to be taken for demonstration purposes.
A fun toy that lets you build a sledge run and then test it out. You'll need a good feel for the laws of motion to get results!
A look at the results from BICEP2 detector in the south pole which gives evidence for inflation happening at the start of the universe.
Kaufmann's experimental results on deflection of electrons in an electromagnetic field favoured Abraham's theory, not Einstein and Lorentz, but were eventually proved wrong.
Showing 1 - 10 of 133