【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
饮水机是一种常用的家用电器,其工作原理的简化电路如图所示,S是用感温材料制成的温控开关,当温度达到一定的数值时,S会自动切换使饮水机处于保温状态,R1是与加热管串联的电阻,R2是饮水机加热管的电阻,部分参数如下表: 额定电压 220V 额定频率 50Hz 加热功率(加热状态下R2的额定功率) 440W 保温功率(保温状态下R2的功率) 40W (1)当S闭合时,饮水机是处于保温状态还是加热状态?(2)在加热状态下,饮水机正常工作的电流是多大?(3)R2的电阻多大?
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