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The relationship between voltage (potential difference) and current led to Georg Ohm developing Ohm's law. It states that the current through a conductor is directly proportional to the voltage across it. This means that as the voltage increases across a component so does the current and as the current increases so does the voltage.
You might be asked to carry out a practical on Ohm's law. Try watching the video and then you can use the simulator to try it out for yourself too
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