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灯泡亮度由什么决定

更新时间: 2020-11-30 15:24:49     

灯丝电流功率。灯泡亮度的强弱主要是由灯丝电流功率来决定的。在电压不变时,电流越大电流实际功率越高,灯泡就会越亮。如果电流强度和电压不变时,电阻越小灯泡反而越亮。我们都知道,如果是相同的灯泡,那么电阻是一样的,此时就要通过灯泡实际电流电压来确定亮度,如果是不同的灯泡,就只能根据它们的实际电流来确定灯泡亮度,也就是功率,是电流在单位时间内做功的大小或者是多少来判断。

关键词: 灯泡 亮度 什么 决定

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