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系统的标称电压和设备的额定电压怎样正确理解的问题？ 知乎 Template






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使用如图甲所示的实验器材来测定小灯泡的电功率已知小灯泡的额定电压25伏 1 画出实验电路图 2 把图中所有的实验器材连接起来 sketch template
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题目如图甲所示电源电压保持不变小灯泡的额定电压为12V．闭合开关S后当片P从最右端到最左端的过程中小灯泡的I﹣U关系图象如图乙所 sketch template
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