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初中物理电学中有三大物理量,电流、电压和电阻.其中电阻指导体对电流的阻碍作用,对电流的阻碍作用越大其电阻就越大.而灯泡的电阻有它的特殊性,其特殊性在于它的电阻会随着温度的改变而变化,有些题目考虑温度对灯泡电阻的影响,而一些题目不考虑温度对灯泡电阻的影响.因此,当学生遇到灯泡电阻问题时不知道考虑还是不考虑温度对其的影响.下面通过例题解析的方式谈谈初中物理中灯泡电阻的问题.一、由铭牌求出灯泡的电阻
Physics in junior middle school physics has three physical quantities, current, voltage and resistance.While the resistance of the conductor on the current obstruction, the greater the impediment to the current resistance of the greater the resistance of the bulb has its own particularity, its particularity Is that its resistance will change with temperature, some questions consider the impact of temperature on the bulb resistance, and some topics do not consider the impact of temperature on the bulb resistance, so when students encounter bulb resistance problems do not know to consider or not Consider the impact of temperature on it. The following examples by way of analysis of light bulb physics talk about junior physics problems. First, find the bulb resistance from the nameplate