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Every time you charge your phone, flick a light switch or plug in a kettle, you are interacting with an electrical circuit. But what is actually happening inside it? Use this resource to learn about the key quantities used to describe and measure electricity, the calculations that connect them, and...
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Why does a cheap phone charger cable get warm and charge your phone slowly, or a longer extension cord sometimes struggle to power a kettle or hairdryer? The answer lies in the relationship between voltage, current and resistance. This resource introduces Ohm's law—one of the most used relationships in electronics—and...
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Unlike the fairy lights from the previous page, the appliances in your home are wired in parallel. This is why your refrigerator keeps running when your toaster fails. Each component sits on its own independent path, so a break in one branch doesn't affect the others. This resource builds on...
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A single blown globe can knock out an entire string of fairy lights—because in a series circuit, all components share one continuous path, and a break anywhere stops current flowing everywhere. This resource builds on current, voltage and resistance to explore how series circuits behave, including how voltage is shared...
