Many introductory books on electricity try to relate voltage to water pressure, electric current to water flow, and resistance to changes in pipe volume. Of course, you probably figured out that ...

Batteries are a part of our everyday life, and power everything from phones to gaming handhelds to laptops, but do those ...

Strange metals challenge the 60-year-old theory that electric current consists of a flow of discrete charges. Strange metals ...

An electric current can flow in the wire from one end of the battery to the other, but nothing useful happens. The wire just gets very hot and the battery loses stored internal energy – it ...

Water drops produce electricity when dripped through a small tube. That power might be harnessed as renewable energy in rainy places.

How a Generator Works When an electric current flows through a wire, it generates a three-dimensional magnetic force field around the wire, similar to that surrounding a bar magnet. Magnets are ...

In the Earth (see image below right), the liquid metal that makes up the outer core passes through a magnetic field, which causes an electric current to flow within the liquid metal. The electric ...

Depending on your viewpoint, it can flow either way. When most people think about the electrical system on a tractor or truck, they envision a system where current flows from the positive terminal ...