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如图我们把两个金属圆盘保持一定距离,接通数万伏的高压直流电源,两金属圆盘之间无任何现象产生。如果在两金属圆盘中间放入一支点燃的蜡烛,那么蜡烛火焰与两个金属圆盘间就会出现美丽的电火花。为什么在蜡烛火焰和两圆盘之间会产生美丽的电火花? 答:这是因为高温的火焰是一团等离子体,所以当两个带电圆盘靠近时产生了强烈的放电现象。其实,在我们日常生活中也会常常遇到这种现象。比如在阴雨天,高压线产生的电晕现象。在强电场作用下,物体曲
As shown in the figure, we have kept two metal disks at a certain distance and switched on tens of thousands of volts of high-voltage direct current power. There is no phenomenon between the two metal disks. If you put a lighted candle in the middle of a two-metal disk, a beautiful spark will appear between the candle flame and the two metal disks. Why a beautiful spark between the candle flame and the two discs? A: This is because the high-temperature flame is a plasma, so when the two charged discs approach, a strong discharge occurs. In fact, we often encounter this phenomenon in our daily lives. For example, in the rainy days, the corona phenomenon produced by high-voltage lines. Under the action of a strong electric field, the object