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) Railway. It was built on the frame of a 1988-built vehicle of similar design (one of the last to be built) and has a newly fabricated body replicating that of two similar locomotives that operated the railway between 1921 and 1926. It has been built to represent "Polar Bear" in original form, and works engineering trains and occasional passenger services. 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