山西省太原市2026届高三年级模拟考试（一）物理+答案

一、选择题：本题共7小题，每小题4分，共28分。在每小题给出的四个选项中，只有一项是符合题目要求的。题目1234567答案DDCADCB二、多项选择题：本题包含3小题，每小题6分，共18分。在每小题给出的四个选项中，至少有两个选项正确，全部选对的得6分，选对但不全的得3分，有选错的得0分。题目89答案ACADBD三、实验题：本题包含2小题，共16分。（1）0.650（3分）（2）d（2分）（33分）12.（8分）LS1（22分）IaSpb_R0S四、计算题：本题包含3小题，共38分。解答应写出必要的文字说明、方程式和重要演算步骤，只写出最后答案的不能得分。有数值计算的题，答案中必须明确写出数值和单位。13.（9分）（1）瓶内气体发生等容变化p1p2=···············································································TT2TT=t2+273K=300Kp2=1.5atm··········································································（2）瓶内原有气体，据理想气体状态方程p1Vp3V,=··········································································TT2mV,V 漏=-·········································································mV,Vm漏1=···············································································m原314.（12分）C=q·················································································（2分）Eq=CE················································································（1分）（2）S拨向2，电容器放电，线框加速运动并切割磁感线产生感应电动势，直到电容器两极间电压与线框的感应电动势相等时，电容器放电结束，线框获得的速度最大，此时电容器的电压为U,电容器的电荷量为q1U=BLv··············································································（1分）对于线框，由动量定理2ΣiLBΔt=mv_0································································（1分）Δq=q_q1=2ΣiΔt·····························································（1分）（3）根据图像可得电容器储能公式为CU2·······························（1（3）根据图像可得电容器储能公式为CU2·······························（1分）2根据能量守恒定律CECUmv2+Q总·················································（2分）PQ边在加速过程中发出的热量QQ总·············································································（1分）Q·································································（1分）15.（17分）（1）离子带负电····································································（3分）（2）离子从ab边界进入磁场到N点做匀速圆周运动，根据几何条件，离子在磁场中的轨迹半径为r1r=R··················································································（1分）2vqv1B=m1··········································································（1分）vr1离子从N点到P点做类平抛运动qE1=ma1·············································································（1分）R=v1t1················································································（1分）Ra1t·············································································（1分）E=E1=2kRB2·····································································（1分）（3）离子从距M点0.8R处射入磁场，做匀速圆周运动，半径为r2，Rsinθ+r2=0.8R·································································（1分）Rcosθ+r2=R·····································································（1分）sin2θ+cos2θ=1离子做匀速圆周运动周期为T磁1，运动时间为t磁1v2=0.2BkRπ磁12Bkt=············································································（磁12Bk离子从C点进入电场到Q点做类平抛运动，运动时间为t2，OC与OM的夹角θ=37°Rsinθ+R=v2t2···································································（1分）0.8RkE2t······································································（1分）从Q点离开电场的速度大小为v3，方向与OQ夹角为α2v2cosα离子从Q点离开电场进入QON直线上方磁场做匀速圆周运动，运动半径为r3，周期为T磁2，运动时间为t磁2，根据几何条件R··············································································（1分）t磁············································································（1分）离子从N点返回电场到D点做类斜