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1包头市2021-2022学年第一学期高三年级调研考试物理试题参考答案一、选择题题号12345678910答案BDBDCABDACADAC二、实验题(11题5分,12题10分,共15分;)11.(2)>(1分);>(1分);=(1分)(3)2211tmtm(2分)12.(3)95(2分)(
4)=(2分)(5)确保干路中电流保持不变(2分)(6)①答案见下图(2分)②5(2分)2三、计算题(13题8分,14题13分,15题16分,共37分)13.(1)LvLvvtx8787................................
1分根据几何关系得切割长度为L41.......................1分BLvRLvBREI21412................................2分流过电阻R的电流方向为N到M(或下到上)..................1分(2)BLvvLL
LBLLBtE41212121212-......................3分14.(1)从P到A12ARvmmg.....................................................2分2A121mvmgh
...................................................2分m21h.......................................................1分(2
)从A到B,AB的竖直高度差为m3cos1sincos12QZ12RLRh................2分2A2B22121mvmvmgh........................................2分m/s10Bv....
............................................1分22BRvmNmg...............................................2分mgN4
1....................................................1分315.(1)研究乙物体221mm/s32mmgmga.....................................1分整体法N8
222mmmgmaF.............................1分所以甲、乙恰好一起做匀加速直线运动(其他检验甲、乙一起做匀加速直线运动方式正确均可给分)m/s35.1322AB1aLv.........
.....................2分(2)211m/s6mqEmgFa甲................................1分21211m/s6.02mqEmgqEmga乙...............
1分21BC21tatvLx甲甲........................................1分解得s1tm3.32121tatvx乙乙....................................1分所以板长m7.23
.36乙甲xxL.......................2分(3)m/s91631Ctavv甲............................1分因为mgEq所以甲
进入电场后仅受洛伦兹力作用,做匀速圆周运动......1分RvmBqv2CC.................................................1分m5BqmvR............................
......................1分4m1CD22LRRh.....................................2分