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第12章第2练 法拉第电磁感应定律、自感和涡流_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练

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第12章第2练 法拉第电磁感应定律、自感和涡流_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第12章第2练 法拉第电磁感应定律、自感和涡流_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第12章第2练 法拉第电磁感应定律、自感和涡流_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第12章第2练 法拉第电磁感应定律、自感和涡流_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第12章第2练 法拉第电磁感应定律、自感和涡流_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练

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1.如图所示,在某次阅兵盛典上,我国预警机“空警-2000”在通过天安门上空时机翼保 持水平,以4.5×102 km/h的速度自东向西飞行.该机的翼展(两翼尖之间的距离)为50 m, 北京地区地磁场向下的竖直分量大小为4.7×10-5 T,则( ) A.两翼尖之间的电势差为2.9 V B.两翼尖之间的电势差为1.1 V C.飞机左方翼尖的电势比右方翼尖的电势高 D.飞机左方翼尖的电势比右方翼尖的电势低 2.(2022·江苏卷·5)如图所示,半径为r的圆形区域内有垂直于纸面的匀强磁场,磁感应强度 B随时间t的变化关系为B=B +kt,B 、k为常量,则图中半径为R的单匝圆形线圈中产生 0 0 的感应电动势大小为( ) A.πkr2 B.πkR2 C.πBr2 D.πBR2 0 0 3.如图,线圈L的自感系数极大,直流电阻忽略不计;D 、D 是两个二极管,当电流从 1 2 “+”流向“-”时能通过,反之不通过;R 是保护电阻,则( ) 0 A.闭合S之后,B灯慢慢变亮 B.闭合S之后,A灯亮且亮度不变 C.断开S瞬时,A灯闪一下再慢慢熄灭 D.断开S瞬时,B灯闪一下再慢慢熄灭 4.(2023·广东省模拟)在油电混合小轿车上有一种装置,刹车时能将车的动能转化为电能,启动时再将电能转化为动能,从而实现节能减排.图中,甲、乙磁场方向与轮子的转轴平行, 丙、丁磁场方向与轮子的转轴垂直,轮子是绝缘体,则采取下列哪个措施,能有效地借助磁 场的作用,让转动的轮子停下( ) A.如图甲,在轮上固定如图绕制的线圈 B.如图乙,在轮上固定如图绕制的闭合线圈 C.如图丙,在轮上固定一些细金属棒,金属棒与轮子转轴平行 D.如图丁,在轮上固定一些闭合金属线框,线框长边与轮子转轴平行 5.磁电式仪表的基本组成部分是磁体和线圈.缠绕线圈的骨架常用铝框,铝框、指针固定在 同一转轴上.线圈未通电时,指针竖直指在表盘中央;线圈通电时发生转动,指针随之偏转, 由此就能确定电流的大小.如图所示,线圈通电时指针向右偏转,在此过程中,下列说法正 确的是( ) A.俯视看线圈中通有逆时针方向的电流 B.穿过铝框的磁通量减少 C.俯视看铝框中产生顺时针方向的感应电流 D.使用铝框做线圈骨架能够尽快使表针停在某一刻度处 6.(多选)(2023·湖北省模拟)如图所示,在距地面高h=1.25 m处固定有两根间距为l=0.5 m 水平放置的平行金属导轨,导轨的左端接有电源E,右端边缘处静置有一长l=0.5 m、质量 m=0.2 kg、电阻R=5.0 Ω的导体棒ab,导体棒所在空间有磁感应强度大小B=1.0 T、方向 竖直向上的匀强磁场.闭合开关后,导体棒ab以某一初速度水平向右抛出,已知导体棒落 地点到抛出点的水平距离d=2.5 m,重力加速度g=10 m/s2,则( ) A.在空中运动过程中,导体棒a端的电势低于b端的电势B.导体棒抛出时的初速度大小为5 m/s C.在空中运动过程中,导体棒上产生的感应电动势大小恒定 D.在空中运动过程中,导体棒的速度逐渐变大,棒上产生的感应电动势增大 7.如图所示,在半径为R的圆形区域内存在垂直于平面向里的匀强磁场,磁感应强度为B, 圆外无磁场.一根长为2R的导体杆ab水平放置,a端处在圆形磁场的下边界,现使杆绕a 端以角速度ω逆时针匀速旋转180°,在旋转过程中( ) A.b端的电势始终高于a端 B.ab杆的电动势最大值E=BR2ω C.全过程中,ab杆平均电动势=BR2ω D.当杆旋转θ=120°时,ab间电势差U =BR2ω ab 8.(多选)(2023·广东深圳市光明区高级中学模拟)发光竹蜻蜓是一种常见的儿童玩具.某同学 对竹蜻蜓的电路作如下简化:如图所示,导电圆环绕垂直于圆环平面、通过圆心 O的金属 轴OO 以角速度ω逆时针(俯视)匀速转动.圆环上接有三根金属辐条OP、OQ、OR,辐条 1 2 互成120°角.在圆环左半部分张角也为120°角的范围内(两条虚线之间)分布着垂直圆环平面 向下、磁感应强度大小为B的匀强磁场,在转轴OO 与圆环的边缘之间通过电刷M、N与 1 2 一个LED灯(二极管)相连.除LED灯电阻外,其他电阻不计.下列说法中正确的是( ) A.若OP棒进入磁场中,P点电势小于O点电势 B.金属辐条在磁场中旋转产生的是正弦式交变电流 C.若导电圆环顺时针转动(俯视),也能看到LED灯发光 D.角速度比较大时,能看到LED灯更亮 9.(2022·重庆卷·13)某同学以金属戒指为研究对象,探究金属物品在变化磁场中的热效应. 如图所示,戒指可视为周长为L、横截面积为S、电阻率为ρ的单匝圆形线圈,放置在匀强 磁场中,磁感应强度方向垂直于戒指平面.若磁感应强度大小在Δt时间内从0均匀增加到 B,求: 0(1)戒指中的感应电动势和电流; (2)戒指中电流的热功率. 10.(多选)(2022·山东卷·12)如图所示,xOy平面的第一、三象限内以坐标原点O为圆心、半 径为L的扇形区域充满方向垂直纸面向外的匀强磁场.边长为L的正方形金属框绕其始终在 O点的顶点、在xOy平面内以角速度ω顺时针匀速转动,t=0时刻,金属框开始进入第一 象限.不考虑自感影响,关于金属框中感应电动势E随时间t变化规律的描述正确的是( ) A.在t=0到t=的过程中,E一直增大 B.在t=0到t=的过程中,E先增大后减小 C.在t=0到t=的过程中,E的变化率一直增大 D.在t=0到t=的过程中,E的变化率一直减小 11.(多选)如图甲所示,足够长的光滑金属导轨处在垂直于导轨平面向里的匀强磁场中,其 磁感应强度B随时间t的变化图像如图乙所示.导轨左端接有一个电阻值恒为R的灯泡.从 0时刻开始,垂直于导轨的导体棒ab在水平外力F的作用下从导轨的左端沿导轨以速度v 水平向右匀速运动.导体棒ab的长度为l,导体棒运动过程中与导轨接触良好,导体棒与导 轨的电阻均不计.在导体棒ab向右运动的过程中,下列说法正确的是( )A.灯泡亮度不变 B.灯泡逐渐变亮 C.在t 时刻,F= 0 D.在t 时刻,F= 0
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  1. CONNECT:[ UseTime:0.000600s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000912s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000303s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000253s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000441s ]
  6. SELECT * FROM `set` [ RunTime:0.000216s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000552s ]
  8. SELECT * FROM `wendang` WHERE `id` = 373629 LIMIT 1 [ RunTime:0.005458s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 373629 [ RunTime:0.005007s ]
  10. UPDATE `wendang` SET `lasttime` = 1773119651 WHERE `id` = 373629 [ RunTime:0.000442s ]
  11. SELECT * FROM `wendang` WHERE `id` < 373629 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000482s ]
  12. SELECT * FROM `wendang` WHERE `id` > 373629 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000396s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 373629 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.009053s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 373629 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009671s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 373629 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.011967s ]
0.112161s