Electrical engineering credited with establishing the term "electricity". He also designed the versorium: a device that detects the presence of statically charged objects. In 1762 Swedish professor Johan Carl Wilcke invented a device later named electrophorus that produced a static electric charge. By 1800 Alessandro Volta had developed the voltaic pile, a forerunner of the electric battery In the 19th century, research into the subject started to intensify. Notable developments in this century include the work of Georg Ohm, who in 1827 quantified the relationship between the electric current and potential difference in a conductor, of Michael Faraday (the discoverer of electromagnetic
Polar Bear (battery-electric locomotive) Polar Bear (battery-electric locomotive) Polar Bear was a gauge battery-electric locomotive built by Wingrove & Rogers in 1921 as works no. 314 for the Groudle Glen Railway on the Isle of Man. Together with its sister, "Sea Lion", they were intended to replace two Bagnall steam locos of the same names. The locos were not a success and, despite "Polar Bear" being rebuilt with bogies and a battery truck, the steam locos were reboilered and returned to traffic. "Polar Bear" was eventually scrapped acround 1926. A replica loco was built by Alan Keef in 2003 for the rebuilt Groudle Glen