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串联电路和并联电路是最基本的两种电路,这两种电路各电阻元件上的电流、电压、电阻、电功、电功率有如下特点.如图1所示,在串联电路中,电压、电阻、电功、电功率之比为:U1∶U2=W1∶W2=P1∶P2=R1∶R2.如图2所示,在并联电路中,电流、电阻、电功、电功率之比为:I1∶I2=W1∶W2=P1∶P2=R2∶R1.掌握以上特点,对解答有关电学问题会有很大帮助.
The series circuit and the parallel circuit are the two basic types of circuits. The current, voltage, resistance, electrical power, and electrical power of each resistance element of the two types of circuit have the following characteristics. As shown in Figure 1, the voltage and resistance are in the series circuit. The ratio of electric power to electric power is: U1: U2 = W1: W2 = P1: P2 = R1: R2. As shown in Fig. 2, in the parallel circuit, the ratio of current, resistance, electric power, and electric power is: I1: I2=W1:W2=P1:P2=R2:R1. Having mastered the above characteristics will be of great help in solving electrical problems.