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一、选择题1、如图1所示为两电阻R1和R2的伏安特性曲线。若在两电阻两端加相同的电压,关于它们的电A阻.值电及阻发R热功率比较正确的是()1的阻值较大B.电阻R2的阻值较大C.电阻R1的发热功率较大D.电阻R2的发热功率较大2、一根均匀电阻丝的电阻为R,在温度不变的情况下,下列情况中
First, multiple-choice questions 1, as shown in Figure 1 for the two resistors R1 and R2 volt-ampere characteristic curve. If the same voltage is applied across the two resistors, the electrical resistance and electrical resistance of the two resistors are relatively correct. (1) The resistance is larger. B. The resistance of the resistor R2 is greater. C. Resistance The heating power of R1 is larger D. The heating power of resistor R2 is larger 2. The resistance of a uniform resistance wire is R. In the case of constant temperature, the following conditions