1、答案答案D图图2 2超过弹簧的弹超过弹簧的弹性限度性限度200.0200.0甲甲CBDAEFCBDAEF图图3 3图图5 5d d图图6 6方案编号方案编号电阻箱的阻值电阻箱的阻值R R/1 1400.0400.0350.0350.0300.0300.0250.0250.0200.0200.02 280.080.070.070.060.060.050.050.040.040.0图图9 9电阻电阻R R/电流电流I I/mA/mA电流倒数电流倒数/A/A1 11001002.502.504004002002002.002.005005003003001.661.666026024004001.4
2、21.427047045005001.261.26794794图图1010电流电流I I/mAmA2.72.75.45.412.412.419.519.527.827.836.436.447.147.156.156.169.669.681.781.793.293.2电压电压U U/V/V0.040.040.080.080.210.210.540.541.301.302.202.203.523.524.774.776.506.509.129.1211.4611.46(1)(1)用上表数据描绘电压随着电流的变化曲线；用上表数据描绘电压随着电流的变化曲线；(2)(2)为了探究灯丝电阻与温度的关系，已
3、作出电阻随电流为了探究灯丝电阻与温度的关系，已作出电阻随电流的变化曲线如图的变化曲线如图1111所示，请指出图线的特征所示，请指出图线的特征,并解释形成并解释形成的原因的原因图图1111考前提醒考前提醒由于小灯泡的电阻很小，本实验应该采用由于小灯泡的电阻很小，本实验应该采用“外外接法接法”.图图1212U U/V/V0.000.000.500.501.001.001.501.502.002.002.502.50I I/A/A0.000.000.170.170.300.300.390.390.450.450.490.49图图1313答案答案待测金属丝待测金属丝直流电压直流电压10 V10 V红红0 0E EE E图图1515图图1616图图1717图图1818 返回返回
