Moritz von Jacobi

Engineer from Germany,Russia

Moritz von Jacobi Moritz Hermann (Boris Semyonovich) von Jacobi (Russian: Борис Семёнович (Морис-Герман) Якоби) (September 21, 1801 – March 10, 1874) was a Jewish German engineer and physicist born in Potsdam. Jacobi worked mainly in Russia. He furthered progress in galvanoplastics, electric motors, and wire telegraphy. In 1834 he began to study magnetic motors. In 1835 moved to Dorpat (now Tartu, Estonia) to lecture at Dorpat University. He moved to Saint Petersburg in 1837 to research usage of electromagnetic forces for moving machines for Russian Academy of Sciences. He investigated the power of an electromagnet in motors and generators. While studying the transfer of power from a battery to an electric motor, he deduced the maximum power theorem. Jacobi tested motors output by determining the amount of zinc consumed by the battery. With financial assistance of Czar Nicholas, Jacobi constructed in 1839 a 28 foot electric motor boat powered by battery cells. The boat carried 14 passengers on Neva river against the current. The boat fared at the speed of three miles for hour. The law known as the maximum power theorem states: The transfer of maximum power from a source with a fixed internal  ( Wikipedia article )


Personal facts

Date of birth
Place of birth
Carl Gustav Jakob Jacobi
Physicist, Engineer


Date of death
Place of death
Saint Petersburg

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