Short answers, pulled from the story.
Michael Faraday created the first electric motor on the 3rd of September 1821. This experiment involved a free-hanging wire rotating around a permanent magnet in a pool of mercury at the Royal Institution.
Moritz von Jacobi invented the first truly useful rotating electric motor in 1834. He later improved this motor to drive an electric boat carrying fourteen people across a wide river.
Nikola Tesla obtained a patent for his induction motor in May 1888. He presented his paper A New System of Alternate Current Motors and Transformers to the AIEE describing three patented motor types.
Brushless DC motors typically achieve efficiencies of eighty-five percent or higher, reaching up to ninety-six point five percent. This is significantly higher than the seventy-five to eighty percent efficiency of brushed DC motors.
The largest electric motors exceed one hundred megawatts of output and are used for marine propulsion and pipeline compression. In contrast, the smallest motors fit inside a quartz analog wristwatch.