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例1某兴趣小组利用图1甲所示电路进行如下的实验研究.(1)闭合S1,断开S2,调节电源电压,得到上表中三组数据.请根据表中的数据,计算电阻R的阻值.(计算结果保留1位小数)(2)断开S1,闭合S2,调节电源电压进行有关测量.根据记录到灯泡L的电压和电流的数据绘制成电压和电流的关系图象(如图1乙).根据图象,当电压表示数为2V时,50s时间内,灯泡L消耗了多少电能?
Example 1 An interest group uses the circuit shown in Figure 1 A to conduct the following experimental study: (1) Close S1, turn off S2 and adjust the power supply voltage to obtain the three sets of data in the above table. Calculate the resistance R according to the data in the table (The result of calculation is stored in 1 decimal place.) (2) Disconnect S1, close S2 and adjust the power supply voltage to make the measurement. Draw the relationship between voltage and current based on the voltage and current data recorded in lamp L Figure 1 B). According to the image, when the voltage is 2V, how much power is consumed by the bulb L in 50s?