Resistance - Ohm's Law

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This equation summarises Ohm’s law. It suggests that any value of voltage you put across a resistor divided by the current it produces in the resistor, will always give the same value of resistance. So, if you plotted a graph you would get:

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Current used in all 3 will be the same (current doesn’t get used up) but energy used per coulomb (i.e. pd) will depend on value of resistance

So,

Here the voltage across all three will be the same but current through each depends on resistance of each.

So:-

Therefore, inside the cell you get some energy put IN to the circuit by the cell (an emf) some energy taken OUT of the circuit by the resistor (a pd).

So the pd, V, available to the rest of the circuit (the external circuit, as some questions ...

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