云南省云南师范大学附属中学2024-2025学年高考适应性月考卷(五)物理答案
物理参考答案选择题:共10小题,共46分。在每小题给出的四个选项中,第1~7题只有一项符合题目要求,每小题4分;第8~10题有多项符合题目要求,每小题6分,全部选对的给6分,选对但不全的给3分,有选错的给0分。题号12345678910答案DBDABCCADBDBD【解析】1.断开S后,电容器带电量不变,结合,,可知,当改变板间距离时,两板间电场强度不变,故A、B错误。保持S闭合时,两板间电压恒定,两板间距离减小时,板间电场强度增大,油滴所受电场力增大,将会向上运动,故C错误,D正确。2.据动量守恒定律可得,解得,故选B。3.动量对时间的变化率等于小球所受的合外力,可得,,解得,故D正确。4....
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