The term 'eponymous physicist' refers to four famous scientists: Georg Ohm, Enrico Fermi, Nikola Tesla, and James JOULE. Georg Ohm was a German physicist who is best known for his work on electrical circuits and the law that bears his name, Ohm's Law. Enrico Fermi was an Italian physicist who made major contributions to the development of quantum theory, nuclear and particle physics, and statistical mechanics. Nikola Tesla was a Serbian-American inventor and engineer who made revolutionary contributions to the development of alternating current electricity. Finally, James JOULE was an English physicist who studied the nature of heat and discovered the mechanical equivalent of heat.