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【2026版高中物理粤教版选择性必修二册学习笔记练透word培优讲义章末检测试卷(第三章)

【2026版高中物理粤教版选择性必修二册学习笔记练透word培优讲义章末检测试卷(第三章)

(满分:100分)

一、单项选择题(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。)

1.如图甲所示是手摇手机充电器,它体型小,携带方便,可以在紧急状态下给手机临时充电。若某人摇动手柄给手机充电时,其内部线圈在匀强磁场中绕垂直于磁感线的轴匀速转动,当线圈转到图乙所示位置时,下列说法正确的是(

A.线圈中无电流B.电流方向将发生改变

C.线圈中的电流最大D.穿过线圈磁通量的变化率为0

2.2021·天津卷)如图所示,闭合开关后,R=5 Ω的电阻两端的交流电压为u=50sin 10πt V,电压表和电流表均为理想交流电表,则(

A.该交流电周期为0.02 sB.电压表的读数为100 V

C.电流表的读数为10 AD.电阻的电功率为1 kW

3.如图甲所示为科技小组制作的风力发电机简易模型,在风力的作用下,风叶带动与其固定在一起的永磁体转动,转速与风速成正比。某一风速时,线圈中产生的正弦式交变电流如图乙所示,则(

A.t=0.1 s时穿过线圈的磁通量为零

B.磁体的角速度为20π rad/s

C.风速减半时电流i=0.6sin 20πtA

D.风速减半时线圈中电流的有效值为0.6 A

4.某理想变压器原、副线圈的匝数比n1n2=31111,原线圈输入电压的变化规律如图甲所示,电路如图乙所示,P为滑动变阻器的触头,电表均为理想交流电表。闭合开关S后,将滑动变阻器的滑片P从最上端往下滑的过程中,下列说法正确的是(

A.电流表的示数增大B.电压表的示数为11 V

C.副线圈输出电压的频率为100 HzD.变压器的输入功率减小

5.2020·浙江7月选考)如图所示,某小型水电站发电机的输出功率P=100 kW,发电机的电压U1=250 V,经变压器升压后向远处输电,输电线总电阻R线=8 Ω,在用户端用降压变压器把电压降为U4=220 V。已知输电线上损失的功率P线=5 kW,假设两个变压器均是理想变压器,下列说法正确的是(

A.发电机输出的电流I1=40 A

B.输电线上的电流I线=625 A

C.降压变压器的匝数比n3n4=19011

D.用户得到的电流I4=455 A

6.汽车启动的工作原理如图所示,首先由转换器将蓄电池的直流电转换为正弦式交流电,并加在一理想变压器的原线圈上,变压器原、副线圈的匝数分别为n1n2,电压表为理想交流电压表。当变压器副线圈输出电压的瞬时值达到12 000 V时,火花塞产生电火花点燃发动机汽缸内的雾化汽油,发动机开始工作。已知开关S闭合时,电压表的示数为12 V,要使发动机点火成功,变压器原、副线圈匝数比的最大值为(

A.1 000B.C.500D.

7.2023·惠州市华罗庚中学高二月考)手机无线充电的工作原理如图甲所示,它由送电线圈和受电线圈组成。已知受电线圈匝数为30,总电阻为r=2 Ω。在它的cd两端接一阻值为R=6 Ω的电阻。若受电线圈内磁通量Φ随时间t变化的规律如图乙所示,则(

A.t=0时刻,受电线圈中产生的感应电流最大

B.受电线圈中产生的电动势的有效值为12 V

C.无线充电1 min,电阻R上产生的焦耳热为405 J

D.0~t1时间内,通过电阻R的电荷量为2.5×10-5 C

二、多项选择题(本题共3小题,每小题6分,共18分。在每小题给出的四个选项中,有多项符合题目要求。全部选对的得6分,选对但不全的得3分,有选错的得0分。)

8.某同学自制变压器,原线圈为n1匝,在做副线圈时,将导线ab对折后并在一起,在铁芯上绕n2圈,从导线对折处引出一个接头c,连成如图所示电路。S为单刀双掷开关,线圈电阻不计,电压表为理想电表,原线圈接u1=Umsin ωt的交流电源。下列说法正确的是(

A.Sb时,电压表示数为

B.Sc时,电压表示数为

C.Sc时,滑动变阻器滑动触头P向下移动,变压器输入功率变大

D.Sc时,滑动变阻器滑动触头P向上移动,变压器输入电流变大

9.无线充电给我们生活带来了很大的方便,图甲是手机无线充电器的示意图,其原理如图乙所示,当送电线圈接上220 V的正弦交变电流后,会产生一个变化的磁场,从而使手机的受电线圈中产生交变电流,该电流经过其他装置转化为直流电给手机充电,该装置实际上可等效为一个无漏磁的理想变压器。送电线圈的匝数为N1,受电线圈匝数为N2,N1N2=441,若手机电阻为Ω,当该装置给手机充电时,下列说法正确的是(

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  1. CONNECT:[ UseTime:0.000501s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000753s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000329s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000264s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000514s ]
  6. SELECT * FROM `set` [ RunTime:0.000182s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000550s ]
  8. SELECT * FROM `article` WHERE `id` = 487835 LIMIT 1 [ RunTime:0.000449s ]
  9. UPDATE `article` SET `lasttime` = 1775097240 WHERE `id` = 487835 [ RunTime:0.012102s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000422s ]
  11. SELECT * FROM `article` WHERE `id` < 487835 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000620s ]
  12. SELECT * FROM `article` WHERE `id` > 487835 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000436s ]
  13. SELECT * FROM `article` WHERE `id` < 487835 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000767s ]
  14. SELECT * FROM `article` WHERE `id` < 487835 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000782s ]
  15. SELECT * FROM `article` WHERE `id` < 487835 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003048s ]
0.111531s