一、物理量的关系图表在大纲要求的两个电阻的串、并联电路计算中,涉及到电压、电流、电阻三类物理量的一个总量和二个分量,总计九个物理量,而这九个量之间既有欧姆定律的联系,又有串、并联电路特点的联系,关系等式多达七个(六个独立等式和一个导出等式)。根据方程理论知道,可以在三个独立的已知条件下运用这些关系等式求出六个未知量。量之多,关系之复杂,难度之高可 First, the relationship between the physical quantity of the diagram In the string resistance and parallel circuit calculation of the two resistors required by the outline, it involves a total and two components of the three physical quantities of voltage, current, and resistance, and a total of nine physical quantities, and these nine quantities There are connections between Ohm’s law and the characteristics of string and parallel circuits, with as many as seven equations (six independent equations and one derived equation). According to the theory of equations, it is known that the six unknowns can be found using these relational equations under three independent known conditions. The amount is large, the relationship is complicated, and the difficulty is high