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U-I图象是电路部分一个很重要的考点.在每年的考试中总是以不同形式频繁出现,而且它对考生的综合素质有较高的要求,我们只要引导学生掌握U-I图象具有的内涵,熟悉处理此类问题的方法.必能取得好的教学效果.一、U-I图象中包括的信息(1)对一个电阻或用电器的U-I图象的认识:图象将反映出该电阻或用电器两端的电压U随通过它的电流I的变化关系,以及该电阻或用电器在不同工
UI image is a very important part of the circuit test sites in the annual exam always appears in different forms frequently, and it has a higher overall qualifications of candidates, we only need to guide students to master the connotation of the UI image, Familiar with the method of dealing with such problems will be able to achieve good teaching results I. UI images include information (1) on a resistor or electrical UI image recognition: the image will reflect the resistance or use The voltage across the electrical U with the current I through it changes, and the resistance or electrical appliances in different workers