Investigação experimental das leis de Ohm com associação de resistores : uma proposta pedagógica

Abstract

This work experimentally investigates the behavior of Ohm's Law and the Resistor Law. For this purpose, experiments were performed using electrical circuits with resistors of 1 kΩ, 1,5 kΩ and 2,2 kΩ, subjected to variable voltages from 1,0 V to 10 V, with simultaneous measurements of electric current and voltage performed by digital multimeters. From the collected data, graphs of voltage (ΔU) versus current (I) were constructed, whose slopes allowed the determination of the experimental resistances and their comparison with the nominal values. The study combines a theoretical review of the fundamental concepts of electricity and electrical resistance with the practical application of the analyzed phenomena. The results confirmed the linear proportionality between voltage and current in ohmic materials. In addition to contributing to understanding, this work aims to promote a didactic and experimental approach to teaching electricity, encouraging the connection between theory and practice of the principles of electricity.