Electricity articles

A calculator hands you volts, amps or watts the moment you have the other two. It does not tell you what the relationship between them actually is, or the conditions under which that tidy proportion quietly stops being true. The articles in this category cover that part of electricity: what a law of physics is really claiming, the everyday circuits where it holds, and the cases — heat, capacitance, materials that care which way the current runs — where it does not. Some of them sit alongside one of our electricity calculators and explain the reasoning it runs on; others stand on their own. Read the one that matches your question, or start at the top and work down.