death_date death_place birth_place birth_date image article_title name
10 february 1865 rome , papal state dorpat , russian empire 12 february 1804 heinrich friedrich emil lenz.jpg heinrich lenz
 heinrich lenz
heinrich lenz

heinrich friedrich emil lenz -lrb- -rrb- -lrb- 12 february 1804 -- 10 february 1865 -rrb- was a russian physicist of baltic german ethnicity .
he is most noted for formulating lenz 's law in electrodynamics in 1833 .
the symbol formula_1 , conventionally representing inductance , is chosen in his honor .
lenz was born in dorpat -lrb- nowadays tartu , estonia -rrb- , at that time the governorate of livonia in the russian empire .
after completing his secondary education in 1820 , lenz studied chemistry and physics at the university of dorpat .
he traveled with the navigator otto von kotzebue on his third expedition around the world from 1823 to 1826 .
on the voyage lenz studied climatic conditions and the physical properties of seawater .
the results have been published in `` memoirs of the st. petersburg academy of sciences '' -lrb- 1831 -rrb- .
after the voyage , lenz began working at the university of st. petersburg , russia , where he later served as the dean of mathematics and physics from 1840 to 1863 and was rector from 1863 until his death in 1865 .
lenz also taught at the petrischule in 1830 and 1831 , and at the mikhailovskaya artillery academy .
lenz had begun studying electromagnetism in 1831 .
besides the law named in his honor , lenz also independently discovered joule 's law in 1842 ; to honor his efforts on the problem , it is also given the name the `` joule -- lenz law , '' named also for james prescott joule .
lenz eagerly participated in development of the electroplating technology , invented by his friend and colleague moritz von jacobi .
in 1839 , lenz produced several medallions using electrotyping .
along with the electrotyped relief produced by jacobi the same year , these were the first instances of galvanoplastic sculpture .
lenz died in rome , after suffering from a stroke .
