The same theory applies to coffee makers, electric tea kettles, and hot plates.
同样的道理适用于咖啡机、电茶壶和轻便电炉。
2
And the charges in the plates are what causes the electric field between the plates. That is how you can get the relation between voltage and charge in these guys.
板材上的电荷，生成了薄片间的电场，这就是得到电势与电荷之间关系的方法。
3
Ash particles have a small electric charge, and are then trapped on one of the plates.