来自钱晓明的问题
帮我做两个简单的物理题.并说明理由1.A.B.C三盏灯分别标有:"220V/60W","110V/60W","36V/60W",那么这三盏灯在正常发光时最亮的是:()A.A灯B.B灯C.C灯D.都一样亮2.两个灯分别标有"220V,40W"和"220V,15W",把
帮我做两个简单的物理题.并说明理由
1.A.B.C三盏灯分别标有:"220V/60W","110V/60W","36V/60W",那么这三盏灯在正常发光时最亮的是:()A.A灯B.B灯C.C灯D.都一样亮
2.两个灯分别标有"220V,40W"和"220V,15W",把这两个灯串联起来接入220V电源上,哪个更亮?
