At Graz, which professor's electricity lectures fascinated Tesla?

At Graz, Jakob Pöschl’s electricity lectures fascinated Nikola Tesla.

Tesla studied at the Imperial-Royal Technical College in Graz from 1875. Pöschl was the professor of experimental and technical physics, and his demonstrations gave Tesla an unusually vivid introduction to electrical machines and alternating-current phenomena. Tesla later remembered Pöschl’s presentation of a Gramme dynamo as an important influence on his thinking about induction motors.

The common mix-up is with Tesla’s earlier schooling in Karlovac, where a physics teacher’s electricity demonstrations first sparked his interest. That teacher is often identified as Martin Sekulić, not Pöschl. Pöschl belongs specifically to Tesla’s university years in Graz.

Tesla’s time at the college ended without a degree: although he performed brilliantly at first and passed many examinations, his attendance and finances later deteriorated. He left Graz in December 1878, but the electrical ideas encountered there continued to shape his later work on rotating magnetic fields and alternating current.