定值电阻R1的发热功率和电流的关系图象如图所示，定值电阻R2=7Ω，把这两个电阻串联接入电路中时，电阻R1两端的电压U1和电阻R2两端的电压U2之比为_1，若把这两个电阻并联接入电路中，通过电阻R1的_刷题宝

题干

定值电阻R₁的发热功率和电流的关系图象如图所示，定值电阻R₂=7Ω，把这两个电阻串联接入电路中时，电阻R₁两端的电压U₁和电阻R₂两端的电压U₂之比为____，若把这两个电阻并联接入电路中，通过电阻R₁的电流I₁和通过电阻R₂的电流I₂之比为____．

上一题下一题 0.0难度选择题更新时间:2012-10-27 10:58:56

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10：7,7：10

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