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百师联盟·2024届高三一轮复习联考(一) (新教材)数学试卷答案

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8.某种驻极体自身总带有定量的电荷,且所带电荷无法自由移动,利用驻极体可实现力电转换,进而解决可穿戴电子设备的供电难题。下图为某种可发生弹性形变的驻极体,其内部带有负电荷,闭合开关,按压驻极体,下方金属板上的自由电子在静电力作用下发生如右图所示的移动。则闭合开关A.在向下按压驻极体的过程中,电流自左向右流经电阻RB.在向下按压驻极体的过程中,机械能转化为电能C.若周期性按压驻极体,则流经电阻R的电流方向不断改变D.若断开开关S,按压驻极体,则下方金属板上的P点电势升高