PETER BOWATER / SCIENCE PHOTO LIBRARY PETER BOWATER / SCIENCE PHOTO LIBRARY
Electrical generator core with a technician working inside the central space during construction. Only the outer part of the core is seen here, consisting of numerous electrical wires arranged around the central space. When in use, a turbine (not seen) will drive a shaft that runs through the central space. Magnets on the shaft will rotate as the shaft rotates, inducing electrical currents in the wires. This electrical current is then distributed around a grid and used to power electrical devices. The rotation of the turbine is usually by steam in a coal or nuclear power station, but other types of power include wind, geothermal, and hydroelectric power.
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