2024届陕西省七年级学业水平质量监测(双倒三角形)物理试卷答案试卷答案,炎德英才答案网站目前收集并整理关于2024届陕西省七年级学业水平质量监测(双倒三角形)物理试卷答案试卷答案得系列试题及其答案，更多试题答案请关注我们

2024届陕西省七年级学业水平质量监测(双倒三角形)物理试卷答案试卷答案

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2024届陕西省七年级学业水平质量监测(双倒三角形)物理试卷答案第一部分

3.平静的嘉陵江水面受到扰动后,某时刻的波形如图所示,其中随波振动的两片树叶(可视为质点)分别位于P点、Q点。已知该波可简化为简谐横波、周期为0.1s,结合图像信息,下列说法正确的是A.此时刻两树叶的速度相同B.此时刻两树叶的加速度相同C.两树叶将同时回到平衡位置D.该波的波速为3m/s

2024届陕西省七年级学业水平质量监测(双倒三角形)物理试卷答案第二部分（待更新）

4.图甲是直流门铃的原理图,闭合开关门铃响.图乙为“自发电”门铃原理图,按下门铃按钮过程磁铁靠近螺线管,松开门铃按钮磁铁远离螺线管回归原位置.下列关于两种门铃工作时的说法正确的是衔铁螺线管磁铁按下按钮N]s松开按钮铃碗AB甲乙中,闭合开关电流通过电磁铁时P端为极B.图甲中,小锤击打铃碗时,电磁铁仍具有磁性πY图乙中,按住按钮不动,螺线管相当于直流电源对门铃供由七=πrD.图乙中,按下按钮过程,螺线管B端电势比A端电势高