After many other more or less successful attempts with relatively weak rotating and reciprocating apparatus the Prussian Moritz von Jacobi created the first real rotating electric motor in May 1834 that actually developed a remarkable mechanical output power. His motor set a world record which was improved only four years later in September 1838 by Jacobi himself. His second motor was powerful enough to drive a boat with 14 people across a wide river. It was not until 1839/40 that other developers worldwide managed to build motors of similar and later also of higher performance. COUNT 5
QSN1 When were developers competing with Jacobi able to match his accomplishments? ANS1 1839/40 QSN2 What was Jacobi's improved motor used to propel? ANS2 boat QSN3 Who created the first real electric motor? ANS3 Moritz von Jacobi QSN4 Who broke the world record set by Jacobi's first motor? ANS4 Jacobi himself QSN5 How long did it take for Jacobi's first world record to be broken? ANS5 four years