利用两种不同规格的灯泡创设实验情境,可以引发用电器连接方式判断的思维冲突,可找到判断串并联的有效方法;引发电流大小判断的思维冲突,可区分灯泡亮度和电流大小;创设电路故障判断的思维冲突,可提高思考问题的全面性;创设灯泡亮暗判断的思维冲突,可认清额定功率和实际功率. The use of two different specifications of the light bulb to create experimental situations, can trigger the thinking of electrical connections to determine the way the conflict can be found to determine the effective method of series and parallel; triggering the size of the current thinking conflict can distinguish the bulb brightness and current size; Judgment of the conflict of thinking, can improve the comprehensiveness of thinking problems; create light bulb dark judgment of the thinking conflict, you can recognize the rated power and the actual power.