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
Plug-in electric vehicles in Japan sold 52,234 plug-in electric vehicles in Japan since July 2009. The first prototype battery switch station from Better Place was demonstrated in Yokohama on May 14, 2009. On April 2010, a 90-day switchable-battery electric taxi demonstration project was launched in Tokyo, using three Nissan Rogue crossover utility vehicles, converted into electric cars with switchable batteries provided by A123 Systems. The battery switch station deployed in Tokyo is more advanced than the Yokohama switch system demonstrated in 2009. During the three-month field test the EV taxis accumulated over and swapped batteries 2,122 times, with an average battery swap time of 59.1