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根据闭合电路欧姆定律,用图甲所示电路可以测定电池的电动势和内电阻.图中R0两端的对应电压U12,对所得的实验数据进行处理,就可以实现测量目的.根据实验数据在 1 U12 -R坐标系中描出坐标点,如图乙所示.已知R0=150Ω,请完成以下数据分析和处理.
(1)图乙中电阻为______Ω的数据点应剔除;(2)在坐标纸上画出 1 U12 -R关系图线(3)图线的斜率是______(U-1Ω-1),由此可得电池电动势En______V.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAA5ElEQVRYR2NkGGDAOMD2M+B0wKpVq9huv/jbxPD/fxwDA4MkhQ59zsDIuEhVgrkuLCzsF7JZOB3QOml5B8P//+UUWoyqnZGxszovsoI4B0xc9gyfzxmZmb2rcsK3IRvWMWm599///7fgcfTz6vwoKWId8B+f75kZGX0q8iK3kugAhur8KJRQxx0FE5fhdQC5UTPqgNEQGA2B0RAYDYHREBgNgaETAuTW96TqG7yt4tbRFhGRIQBqHTP9+8dIoDUMTxqk5AK8zXKYiaDWMYhNpANIaJYPdMdkwLtmpOZnctUPeDkAAP6tmiH1ggTLAAAAAElFTkSuQmCC)
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