Leo Graetz

Leo Graetz ( born September 26, 1856 in Breslau, † November 12, 1941 in Munich) was a German physicist.

Life

Graetz was the son of the famous Jewish historian Heinrich Graetz. He studied mathematics and physics in Breslau, Berlin and Strasbourg. In 1881 he became the assistant of August Kundt in Strassburg. In 1883 he went to Munich, where he in 1908 as an associate professor against the will of the same time full professor Wilhelm Conrad Röntgen was awarded. In 1926 he is professor emeritus and received in the same year the Golden Ring of Honour of the German Museum.

Graetz dealt among other things with magnetism, electricity and atomic models. Named after him, the rectifier bridge, a bridge rectifier circuit with four diodes and the Graetz'sche cell. The latter is no longer a common form of an electrolytic rectifier dar. This consists of an aluminum cup as the outer electrode and is filled with sodium hydroxide solution. Within the cup is in the sodium hydroxide solution, an iron / carbon electrode. The electric current is conducted to each well different direction between the two electrodes.

Writings

• The electricity and its applications for illumination, power transmission, metallurgy, telephony and telegraphy: shown for other circuits. Publisher of J. Engelhorn, Stuttgart 1883, appeared in 1892 under the shortened title The electricity and its applications, and for decades was the German standard work of electrical engineering. The last edition was published in 23 1928. 17th Edition of the ULB in 1914 as digitized Dusseldorf