描述
交流电压:交流电压在我们的物理书中的官方介绍是电压的大小和方向都随时间的改变而改变的电叫做交流电压。我们常见的交流电压有我们常用的家庭民用220V电压和工业用380V的交流电等等,因为交流电随着时间的变化而变化,所以有时电压很高有时电压却很低,是不稳定的,所以交流电压是有平均值和峰值的,而我们所说的220V和380V等都是交流电压的平均值,交流电压的平均值是取自其峰值电压的0.707倍。
两者区别:直流电压和交流电压的区别之一很明显的在于二者的大小和方向与时间的关系是不同的,直流电压是均不改变,但是交流电压是均会改变的;区别之二在于直流电压因为其电压的方向始终是不会改变的,所以会有正极和负极之分,但是交流电压因其时刻会改变,所以就没有正负极之分,但是在这里我们要注意直流电压也不是一成不变的,像是二极管整流之后末滤波稳压之前,还是会有变动的,这种称为脉动直流电;区别之三在于直流电压是经过变电转换的而交流电压是没有经过变电转换的。
我们在生活中区别直流电压和交流电压可以使用交流电压档测量电压,然后再将表笔调换一下位置之后在测量一次电压,如果两次的测量结果相同,那么就可以判定是交流电压,如果两次测量的结果一次是有读数的,但是另一次没有读数的,那么我们就可以判定出是直流电压啦!不管是直流电压还是交流电压在我们的生活中都是很重要的!
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