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首页> 外文期刊>The Physics Teacher >The Sponge Resistor Model -A Hydrodynamic Analog to Illustrate Ohm's Law, the Resistor Equation R = p?/A, and Resistors in Series and Parallel
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The Sponge Resistor Model -A Hydrodynamic Analog to Illustrate Ohm's Law, the Resistor Equation R = p?/A, and Resistors in Series and Parallel

机译:海绵电阻器模型-一种流体动力学模拟,用于说明欧姆定律,电阻器方程R = p?/ A以及串联和并联的电阻器

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摘要

Physics students encountering electric circuits for the first time often ask why adding more resistors to a circuit sometimes increases and sometimes decreases the resulting total resistance. It appears that these students have an inadequate understanding of current flow and resistance. Students who do not adopt a model of current, voltage, and resistance necessarily resort to memorizing formulas for calculating, e.g., the resistance of a resistor network. For these students, certain properties of electric circuits may remain mysterious or puzzling.
机译:第一次接触电路的物理专业学生经常会问为什么在电路中增加更多的电阻有时会增加,有时会减小最终的总电阻。看来这些学生对电流和电阻没有足够的了解。不采用电流,电压和电阻模型的学生必须求助于记忆公式来计算例如电阻网络的电阻。对于这些学生,电路的某些特性可能仍然令人困惑或困惑。

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