"Ohm's Law" is the first in a series of lean volumes, with which the author, thanks to a long and consolidated teaching experience, aims to simply and quickly introduce readers to the world of electrical and electronic technologies. This is a basic course, suitable for students but also for workers who have undertaken a professional retraining process. Topics are developed in detail and rigorously, with clear and straightforward exposition. "Let's Try Together" sections provide materials and examples for concrete verification of theoretical aspects. FUNDAMENTALS OF ELECTRICAL AND ELECTRONIC TECHNOLOGIES Vol. 1 - Ohm's Law Vol. 2 - Electrical Circuits Vol. 3 - Kirchhoff, Millman, Thévenin, Norton SANDRO RONCA After studying Physics at the University of Padua, he devoted himself to teaching Electrical and Electronic Technologies and Computer Science at Technical and Technological Institutes, taking careful care of the didactic aspects of the subject. He has delved into the study of computer networks and designed, at the request of Industrial Associations, courses for System Analysts and Computer Security Officers.