Modelo pedagógico de resistores elétricos para descrever fraturas em sistemas físicos

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Universidade Federal de Goiás


The present dissertation is the result of the educational, “Teaching model of electrical resistors to describe fractures in physical systems”, product worked in a class of the third year of high school of the State School Prof. Marcolino de Barros of the municipality of Patos de Minas-MG. In which, we present a simple pedagogical model with the purpose of studying the complex process of ruptures in physical systems. For this, we developed an experimental model together with its theoretical counterpart where we consider a system of electric resistors network subject to a potential difference and analyze the current that passes through the system as a function of the random removal of their resistive components. We use a circuit board, voltage source stabilized at a pre-established potential difference, and a resistor network with a few ohms units each. After the proposed experiments are executed, we obtained appropriate experimental data and from these graphs are generated with which the dependence of the current through the circuit with the interruption of the joints is shown. Taking into account that this system behaves as an ohmic system, the model is used to study several relevant physical concepts. As is the case of an elastic solid subject to Hooke’s law- like deformations, this is then a very broad model.



Fraturas em sólidos, Lei de Hooke, Rede de resistores, Sistemas ôhmicos, Fenômenos críticos, Fractures in solids, Hooke’s law, Resistor’s networks, Ohmic systems, Critical phenomena


CUNHA, Airton Modesto da. Modelo pedagógico de resistores elétricos para descrever fraturas em sistemas físicos. 2018. 128 f. Dissertação (Mestrado em Ensino de Física em Rede) - Universidade Federal de Goiás, Catalão, 2018.