论文部分内容阅读
题目:在图1所示的电路中,R_0=20欧,滑动变阻器 R_1的阻值变化范围是0～30欧,电源电压 U 恒为10伏.求滑片在移动时 R_1消耗的电功率的变化范围.
Title: In the circuit shown in Figure 1, R_0 = 20 ohms, the resistance of the sliding rheostat R_1 varies from 0 to 30 ohms, and the supply voltage U is constant at 10 volts. Find the variation of the electric power consumed by the R_1 while the slider is moving. range.