State Correctional Institution – Mercer is a minimum-security correctional facility near Mercer in the northwestern part of the commonwealth of Pennsylvania. In December of 2025 Mercer held 1,379 inma
Entrance to the facility along PA 258
Electric generator
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In electricity generation, a generator, also called an electric generator, electrical generator, and electromagnetic generator is an electromechanical device that converts mechanical energy to electri
U.S. NRC image of a modern steam turbine generator (STG)
Early Ganz Generator in Zwevegem, West Flanders, Belgium
The Faraday disk was the first electric generator. The horseshoe-shaped magnet (A) created a magnetic field through the disk (D). When the disk was turned, this induced an electric current radially outward from the center toward the rim. The current flowed out through the sliding spring contact m, through the external circuit, and back into the center of the disk through the axle.
Hippolyte Pixii's dynamo. The commutator is located on the shaft below the spinning magnet.