Noble gases are frequently used in tubes for many purposes, from lighting to switching. Pure noble gases are employed in switching tubes. Noble-gas-filled thyratrons have better electrical parameters than mercury-based ones.
The first electric motor able to turn machinery was built by William Sturgeon in 1832. In 1821, Michael Faraday built a machine that made a piece of metal move due to the flow of electricity. Although the amount of motion was small, this was the first published design of an electric motor. All subsequent developments in the use of electricity to make motors work came out of this invention. The first electric motor able to turn machinery was built by William Sturgeon in 1832.
2/26/2012. 1. James A. Mynderse ME588 â DC Motors 1. DC MOTORS. Faraday demonstrated in the mid-19th century. Simple operation âmore voltage translates to more speed. With the introduction of AC power in the early 20th century, AC. motors have displaced DC motors in many applications. Since DC motors are easier to control, they are still retained in. difficult control applications. Two basic mode of operation: