如图所示电路中，闭合开关S，当滑动变阻器的滑片P向下滑动时，

更新 2022-09-03
科目物理
题型选择题
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如图所示电路中，闭合开关S，当滑动变阻器的滑片P 向下滑动时，四个理想电表的示数都发生变化，电表的示数分别用I、U₁、U₂和U₃表示，各电表示数变化量的大小分别用ΔI、ΔU₁、ΔU₂和ΔU₃表示。下列判断正确的是

A．\|ΔU₁\|+\|ΔU₂\|＜\|ΔU₃ \|	B．\|ΔU₁\|+\|ΔU₂\| =\|ΔU₃ \|
C．\|\|不变，变小	D．\|\|变大，不变

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A．\|ΔU₁\|+\|ΔU₂\|＜\|ΔU₃ \|	B．\|ΔU₁\|+\|ΔU₂\| =\|ΔU₃ \|
C．\|\|不变，变小	D．\|\|变大，不变