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1 从部分电路到闭合电路以欧姆定律为核心,重点讨论简单混联电路的电流、电压、电功率的分配问题,是恒定电流的主要内容。 1.1能力植根于扎实的基础知识两个电阻R_1与R_2串联后接入电压为U的电路,则它们的电压U_1与U_2之和等于U,且U_1/U_2=R_1/R_2.则U_1=R_1U/(R_1+R_2)。这是正比分配的表达式。若将它们并联,它们的电流I_1与I_2与总电流I间有I_1=R_2I/(R_1+R_2)。这是反比分配的表达式。
1 from the part of the circuit to the closed circuit with Ohm’s law as the core, focusing on the simple hybrid circuit current, voltage, power distribution, is the main content of the constant current. 1.1 Capabilities are rooted in solid basic knowledge. Two resistors R_1 and R_2 are connected in series and then the voltage is U. The sum of their voltage U_1 and U_2 is equal to U, and U_1/U_2=R_1/R_2. U_1=R_1U /(R_1+R_2). This is a proportional expression. If they are connected in parallel, their currents I_1 and I_2 and the total current I have I_1=R_2I/(R_1+R_2). This is an inversely assigned expression.