electricity

Tesla's alternating current system powers every home on Earth today — yet he died broke and largely forgotten. Here's the full story.

In 1831, Michael Faraday discovered that changing magnetic fields induce electric currents. This fundamental discovery enabled electric motors, generators, and transformed civilization.

Solar panels turn sunlight directly into electricity using the photoelectric effect. They're now the cheapest form of new power generation in most of the world. Here's how they work and whether they pay off.

A modern wind turbine is a 200-metre engineering marvel that converts moving air into electricity. Here's how they work, where they fit in the energy transition, and the realistic limits.

Batteries store electrical energy as chemical energy and release it on demand. The principles are over 200 years old, but the chemistry inside your phone and your EV is still changing.