How Do You Define Electric Field, Voltage, and Current?

These three big ideas are all connected—and a demonstration with water and an LED can show how.

I hope that you are never in a situation in which you are in danger from a downed, but live, power line. However, if that ever happens, the recommended safety procedure is to move away with tiny, shuffled steps. This type of movement will help prevent you from getting shocked.

Of course the best option is just to avoid this type of dangerous situation—but it’s also an opportunity to talk about the important physics of why small steps are the best. We’ll talk about three big ideas: electric potential difference

→ Continue reading at Wired - Science

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