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初中物理中与灯泡有关的知识点很多 ,涉及到很多内容 .例如 :1.灯泡发光的原理是什么 ?2 .灯泡的灯丝为什么选用钨丝 ?为什么要绕成螺旋形 ?3 .60W以下的灯泡为什么要抽成真空 ?4.60W以上的灯泡为什么要充有氮、氩等气体 ?5 .白炽灯泡为什么要制成梨形 ?6.灯泡在照明电路中 ,什
The knowledge of light bulbs in junior high school physics covers a lot of topics. For example: 1. What is the principle of light bulb lighting? 2. Why do tungsten filaments of light bulbs use tungsten filaments? Why do they have to be wound spirally? Light bulbs below 3.60W Why should vacuum be drawn? Why should a bulb of 4.60W or more be filled with nitrogen, argon, etc.? 5. Why does an incandescent bulb be made into a pear shape? 6. How does a bulb in a lighting circuit?