什么样的电阻小提热快的小电阻

电阻小就很难提热快，根据p=u^2/r 可以知道 要想提热快必须在电阻两端加高电压 一般的发热电阻都是高阻值的

楼上说的我不认同，P=UI是没错，但是还有一条最原始的公式是P=I平方*R。所以，你的R一小，你的I就以平方的关系上升。所以，电阻小的话，发热也就越大，但是，前提是你的电源功率要有足够的电流提供给电阻。而且你电阻的实际功率不能超出电阻的标称功率就可以。你可以去买那些金属封装电阻，那些电阻的功率可以去到50W，电阻也有小的，但是，你在它的额定功率下使用，它的温度可以去到很高（我试了，大概有80到100度吧），而且，不会烧坏哦。

jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

小型热敏铂电阻 小而快