51fly国际课程 (51fly.win)

 找回密码
 立即注册

手机扫一扫，访问本页面

 

      

上传图片附件

未使用图片

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp，上传完成后会在上方生成预览，用鼠标连续双击缩略图，或拖动缩略图，该图片就被绑定至本题，显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片，绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


习题练习：Physics Unit21: Electromagnetic Induction & Faraday's Law
本习题练习来源于51fly国际课程 (https://51fly.win)，是在线习题练习的打印版，您也可以访问本平台网站(https://51fly.win/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 80 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://51fly.win/test80.html
 作者: physics    总分: 142分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月20日 21:29  切换到: 整卷模式

标记此题
1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All of the following are units of mag5cr67pcvd(*pad g; ed askk. ;netic flux except

参考答案:    
标记此题
2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Faraday's law of induction states that the2azmm7 w-*t:jaxf 8iy $emf$ induced in a loop of wire is proportional to

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the number of loop-rvfmep .u 71xs of wire in a coil produces what kind of change on tr.m7eu v-fx1phe induced $emf$, assuming all other factors remain constant?

参考答案:    
标记此题
4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the strength of the magnetic fig k5 tndab 5h.:jqf,o+eld through a loop of wire produces what kind of change on the induced jntgo hb qf:.,5k+a5d $emf$, assuming all other factors remain constant?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the diameter of ul k,y,y+.ef:5q ryrya loop of wire produces what kind of change on the induced u,+frlkq.y y yyr:5,e $emf$, assuming all other factors remain constant?

参考答案:    
标记此题
6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As a coil is removed from a magnetix 94b kuxn+k4vc field an $emf$ is induced in the coil causing a current to flow within the coil. This current interacts with the magnetic field producing a force which

参考答案:    
标记此题
7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  According to Lenz's law, the direction of an induced cukb42zy5dl g)w i 4w h;w-vafi6rrent in a conductor will be thf vy kwlgwi-bwi4 26za54d);hat which tends to produce which of the following effects?

参考答案:    
标记此题
8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular coil lies flat on a horizontal table. A bar magnet is held above +x q .0vc3.ahstgbp 3yits center with its north pole pointing down. The stationary magnet induces (when viewed from aboveb+xhs.30. v 3aqcp gyt)

参考答案:    
标记此题
9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular coil lies flat on a horizontal w7)6 vm,g hbkmt;t+g)synzk 9 table. A bar magnet is held above its center with its north pole pointing d 69shty nbk)g+)mmvgk;,tw 7zown, and released. As it approaches the coil, the falling magnet induces (when viewed from above)

参考答案:    
标记此题
10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A coil lies flat on a table top in a region wheti (n3 68ddrlzre the magnetic field vector points straight up. The magnetic field vanishes suddenly. When viewed from above, what is the sense of the induced current inn6ddl 8iz(t3r this coil as the field fades?

参考答案:    
标记此题
11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A coil lies flat on a level table top in a region wher wv:g+owh2bz)e the magnetic field vector points straight up. The magnetic field suddenly grows stronger. When viewed from above, what is the direction of the induced current in this coil as the fw)zb:g2wo h +vield increases?

参考答案:    
标记此题
12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A coil lies flat on a horizontal tabl0.f zqeg2wu1qe top in a region where the magnetic field points straight down. The magnetic field disappears suddenly. Whenezgqfqw10. u 2 viewed from above, what is the direction of the induced current in this coil as the field disappears?

参考答案:    
标记此题
13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A long straight wireq,rj 3b/wz1fh 7pfw84 ayp)uz lies on a horizontal table and carries an ever-increasing current northward. Two coils of wire lie flat on the table, one on either side of the wire. When viewed from awr h,ppw1 )f fz8ub4y7jq3/zabove, the induced current circles

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A bar magnet falls through a loop of wirhd8)c;se i-+ lfws:o be with the north pole entering first. As the north pfdh8 -lewoci;s: +s)bole enters the wire, the induced current will be (as viewed from above)

参考答案:    
标记此题
15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular loop of wire isdhue7 f* hmb;8qv3) oj rotated at constant angular speed about an axis whose direction can be varied. In a region where a uniform magnetic field points strom) jhd;h bq*e3vuf 87aight down, what must be the orientation of the loop's axis of rotation if the induced $emf$ is to be zero?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular loop of wire is rotate s.bu-10vognzx3fz ;hd at constant angular speed about an axis whose direction f1s hv- b0z.ux;3gzoncan be varied. In a region where a uniform magnetic field points straight down, what must be the orientation of the loop's axis of rotation if the induced $emf$ is to be a maximum?

参考答案:    
标记此题
17#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Faraday's law.kb/wz: ( ugo*d, zts)g
参考答案:    

标记此题
18#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Lenz's law.
参考答案:    

标记此题
19#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
List the three ways thathsvx za-34bt qml/e)g0 ;fm heyi 3 yg:t6qg1( an $emf$ can be induced in a loop of wire.
参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A wire moves across a magnetic fp qw:/h 8xs;xlield. The $emf$ produced in the wire depends on

参考答案:    
标记此题
21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A horizontal rod (oriented in the ea7duk3 mw. ji;ust-west direction) is moved northward at constantiud.;m7wk j3 u velocity through a magnetic field that points straight down. Make a statement concerning the potential induced across the rod.

参考答案:    
标记此题
22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A horizontal metal bar rotates at a conw r l /)lbc-ad+fl,p-kna4mp5stant angular velocity $\omega$ about a vertical axis through one of its ends while in a constant magnetic field B that is directed down. The $emf$ induced between the two ends of the bar is

参考答案:    
标记此题
23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electric generato25q-has omxu8tzxh9,kfw;3 c r transforms

参考答案:    
标记此题
24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A generator coil rotates8q wtrp9 1m9et,o4f z .+wipwq through 60 revolutions each second. The frequency of th f9.4 ww1zptrp,qe+ 8it qwm9oe $emf$ is

参考答案:    
标记此题
25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A transformer is a devimc5v :pe,keuila+zwj3u(m,u+ -kx4+/ a l xtqce used to

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A transformer is a demh;g25+ dwx 9oiosf*evice that

参考答案:    
标记此题
27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a transformer, if the secondary efa: e,lr-h,gy -1zin coil contains more loops than the primary coil -:, nfer1ea,zyh-gl ithen it is a

参考答案:    
标记此题
28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a transformer, if the primary coil contagts)9usht)cox:6 o9uv f4j f/ins more loops than the secondary coil theno:f/ uh6uo94txvg)sjt s ) cf9 it is a

参考答案:    
标记此题
29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a transformer, the power inputi t,3qlleo /c/

参考答案:    
标记此题
30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a given LC resonant di-t4wynukj9 z 1/vd8circuit,

参考答案:    
标记此题
31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A resistor and an inductor are connected in series to an ideg-5p9c-u d3gu vqijm ,q3 v8ccal battery of constant terminal voltage. At the mo qqudm5 3 ,jpg ciuc-3g8vv-9cment contact is made with the battery, the voltage across the resistor is

参考答案:    
标记此题
32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A resistor and an inductor are connected in series to s6ynb cpt- +4kan ideal battery of constant terminal voltage. At the moment contact is made with the battery, psb tc-n4k 6y+the voltage across the inductor is

参考答案:    
标记此题
33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A series RL circuit with inductance L and resistance R iodupers. jaa 1ulkltrr7ts.. at,x.4 s2,. o 9s connected to an $emf$. After a period of time, the current reaches a final value of 2.0 A. A second series circuit is identical except that the inductance is 2L. When it is connected to the same $emf$, what will be the final value of the current?

参考答案:    
标记此题
34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A series RL circuit with inductance L and resistance R is connected +;x1euypmh/ /vr set2to an $emf$. After a period of time, the current reaches a final value of 2.0 A. A second series circuit is identical except that the resistance is 2R. When it is connected to the same $emf$, what will be the final value of the current?

参考答案:    
标记此题
35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A resistor and an inductor are connected in series to a battih0c3e mftofsuk++x ( w 8l*isc 2io5(ery. The time constant for the circuitofkc(3* fw5(2sh 8tim+ i oisu ce+xl0 represents the time required for the current to reach

参考答案:    
标记此题
36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A resistor and an inductor are connected in series to a battery. T btgk4;okz p85rame, :;:lckghe battery is suddenly removed from the circuit. The time constant for of the circuit represents the time required for the current to decrease to p: g8el,kobk4k ta;mgr5c:z;

参考答案:    
标记此题
37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All of the following have the same unitik9hit1e p, -qs except:

参考答案:    
标记此题
38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A resistor is connected to an AC power supply. On this circuit, the curreiml:y0n0jrahfyvar7) d 6;- sc 7 u7qwnt

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A pure inductor is connected to an AC powy5n1 jmme*h),cqif8 c.i g3 bker supply. In this circuit, the currenmeq iji gbm).kch 3y*n5, 81fct

参考答案:    
标记此题
40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The inductive reactance in an ac circuit changes by what factor when the frequenkjhxz19z bw(.45n pm9oawek )cy is tripleazkzj 41mbk)wx.(o hp9w 9n 5ed?

参考答案:    
标记此题
41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the frequency of the AC voltage across an inductor is doubled, the inductive ndv cgc+ bug6*kp*6 :breac*vgd* 6 unbg6 +b:ckpctance of that inductor

参考答案:    
标记此题
42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As the frequency of the AC voltage across an ind:x/rr m+ x z4ev/ur63nmyruj )uctor approaches zero, the inductive react/xen ru4z)vr:6m 3rymu+jr/ xance of that coil

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A pure capacitor is coiee dx3 tbr s7o*ab0.-nnected to an AC power supply. In this circuit, the curreneri3edb0 .7- aox*tbs t

参考答案:    
标记此题
44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The capacitive reactf54(s6a6eaoxo 6we1mbs 6c vmance in an ac circuit changes by what factor when the frequency4mw6e f(b vamaeox sc666s5 o1 is tripled?

参考答案:    
标记此题
45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As the frequency of the AC voltage across a capacitor approaches zero, : 6fex 1tcprmmas*p*(ei j.v6the capacitive reactance era1e cmxv (*:tsjpm 6.fp6i*of that capacitor

参考答案:    
标记此题
46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the phase angle between4t 5 s(lqz/ima the voltages of the inductor and capacitor in a RLC series clqsa zm/t54(i ircuit?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The power factor of an Rivd5)8 v:t(hyq cc -q:6mrdkzLC circuit is defined as $\cos M = R/Z$, but the phase angle can also be calculated from .

参考答案:    
标记此题
48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider an RLC circuit. The impedance of the circuit increases ifwe6o +:srtlstr eql0va4v9x4mq 6qfc.u+.:w R increases. Whenl 0+el4ssxvf: 6w :. 4r twmuqcqar9vq+. o6te is this statement true?

参考答案:    
标记此题
49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider an RLC circuit. The impedance of the cmjw24 prl28n8(t vpwp ircuit increases if $X_L$ increases. When is this statement true?

参考答案:    
标记此题
50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider an RLC series circurn9 ittm9 1hm .v4 pjfh-)ncj5it. The impedance of the circuit increases if $X_C$ increases. When is this statement true?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the inductance and the capacitance b/eieo2/0l0t eq r +ck5fivqw1oth double in an LRC series circuit, the resonant frequency of that ci0/f 50el/ve1q+wii ekc2roqt rcuit will

参考答案:    
标记此题
52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider an RLC circuit that is driven by an AC applied voltage. Aqqx 1b 0yghl3isvup) 9y5:v. at resonance,

参考答案:    
标记此题
53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Resonance in a series RLd p l7k57varj(C circuit occurs when

参考答案:    
标记此题
54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A flux of $4.0 \times 10^{-5} \; Wb$ is maintained through a coil for 0.50 s. What $emf$ is induced in this coil by this flux?

参考答案:    
标记此题
55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular loop of radius 0.10 m is rot8c 4t5jkf d+qeating in a uniform magnetic field of 0.20 T. Find the magnej45 +t cke8fdqtic flux through the loop when the plane of the loop and the magnetic field vector are parallel.

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular loop of radius 0.10dp)oq gjt gh:;m2w0jbnote/j52 -fd ( m is rotating in a uniform magnetic field of 0.20 T. Find the magneticn;0 fe/:jgd5pthw( ogj mdb-) 22jqot flux through the loop when the plane of the loop and the magnetic field vector are perpendicular.

参考答案:    
标记此题
57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular loop of radius 0.10 m is rotating in a uniform magnetic fieluoe+lwyiwt x h1r//f 24d7o1 td of 0.20 T. Find the magnetic flux through the loop when the plad47x 1 /wei rh/wotl+fy12 otune of the loop and the magnetic field vector are at an angle of $30^{\circ}$.

参考答案:    
标记此题
58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The cross-sectional area of an adjustable singledj rjcg-;m76z 0q3ise loop is reduced from $1.0 \; m^{2}$ to $0.50 \; m^{2}$ in 0.10
s. What is the average $emf$ that is induced in this coil if it is in a region where B = 2.0 T upward, and the coil's plane is perpendicular to B?

参考答案:    
标记此题
59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The flux through a coil chabdq(;oe5g q-l nges from $4.0 \times 10^{-5} \; Wb$ to $5.0 \times 10^{-5} \; Wb$ in 0.10 s. What $emf$ is induced in this coil?

参考答案:    
标记此题
60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A coil is wrapped with 2sr9d2 a dtqeb+s9,io :lv(3u l00 turns of wire on a square frame with sides 18 cm. A uniform magnetic field is applied perpendicular to the plane of the coil. If the field changes uniformly frob9 ie t ll,qs9:vu+oad3r(2 dsm 0.50 T to 0 in 8.0 s, find the average value of the induced $emf$.

参考答案:    
标记此题
61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A square coil of wire wib; ndsnks/p9/g) 7zeerx :i/.e0lz: akpej4 c th 15 turns and an area of $0.40 \; m^{2}$ is placed parallel to a magnetic field of 0.75 T. The coil is flipped so its plane is perpendicular to the magnetic field in 0.050 s. What is the magnitude of the average induced $emf$?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A coil of 160 turns ans)b 1q7ys qha km7fp386 2kijaz5kwh/d area $0.20 \; m^{2}$ is placed with its axis parallel to a magnetic field of 0.40 T. The magnetic field changes from 0.40 T in the x-direction to 0.40 T in the negative x-direction in 2.0 s. If the resistance of the coil is 16 W, at what rate is power generated in the coil?

参考答案:    
标记此题
63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An airplane with a wing span o 4oe a ;xt:hcpbfze1q*u6h 2l0f 60 m flies horizontally at a location where the downward component of the Earth's ma4 h t;zhxu f2 aepl1*ocq06e:bgnetic field is $6.0 \times 10^{-5} \; T$. Find the magnitude of the induced $emf$ between the tips of the wings when the speed of the plane is 225 m/s.

参考答案:    
标记此题
64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A horizontal metal bar that is 2.0 m long rotates at a constayk x13hk)a/cqmj6/e int angular velocity of 2.0 ra6j3qhaie k k x/1ym)/cd/s about a vertical axis through one of its ends while in a constant magnetic field of $5.0 \times 10^{-5} \; T$. If the magnetic field vector points straight down, what $emf$ is induced between the two ends of the bar?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The coil of a generator has 50 loops and a cross- 6-otx i yk3/ymk*ww9qsectional area of $0.25 \; m^{2}$. What is the maximum $emf$ generated by this generator if it is spinning with an angular velocity of 4.0 rad/s in a 2.0 T magnetic field?

参考答案:    
标记此题
66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An AC generator consists of 100 turns of wi,k0q+x;k *cvp-k uvo ire of area $0.090 \; m^{2}$ and total resistance 12 W. The loops rotate in a magnetic field of 0.50 T at a constant angular speed of 60 revolutions per second. Find the maximum induced $emf$.

参考答案:    
标记此题
67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An AC generator has 80 rectangular loops on its armature. Each loop is d;nrenxz ;8j (12 cm long and 8 cm wide. The armature rotates at 1200 rpm about an axis parallel to the long side. If the loop rotates in a uniform manex 8drzn;j( ;gnetic field of 0.30 T, which is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An AC generator consists of 100 turns of wire o q)qes;8d3ng qvpb2m5f area $0.090 \; m^{2}$ and total resistance 12 W. The loops rotate in a magnetic field of 0.50 T at a constant angular speed of 60 revolutions per second. Find the maximum induced current.

参考答案:    
标记此题
69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Suppose that you wish to construct a simple AC gen,9wlf3s k7q oog wov12erator with an output of 12 V maximum when rotated at 60 Hz. A magnetic fi7 wlkw9sqo 1f 3voog2,eld of 0.050 T is available. If the area of the rotating coil is $100 \; cm^{2}$, how many turns are needed?

参考答案:    
标记此题
70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You are designing a generator with a 0/ oyh3h/0(,qa b ochhhbzfk,maximum $emf$ of 8.0 V. If the generator coil has 200 turns and a cross-sectional area of $0.030 \; m^{2}$, what would be the frequency of the generator in a magnetic field of 0.030 T?

参考答案:    
标记此题
71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The windings of a DC motor have a resistance of 6.00 y75kh rsp wzwm h07g5*n;ym11ehqf pl8yno40 W. The motor operates on $120 \; V$ AC, and when running at full speed it generates a back $emf$ of 105 V. What is the starting current of the motor?

参考答案:    
标记此题
72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The windings of a DC motor have a resistancvkipd2 xgd81y( c8 q4ae of 6.00 W. The motor operates on 120 V AC, and when running at full speed it generates a back gq8kx2d 1v84 p c(dyia$emf$ of 105 V. What current does the motor draw when operating at full speed?

参考答案:    
标记此题
73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A DC motor of internal resistance 6lu:p sss,k8cu: )dt6w.0 W is connected to a 24-V power supply. The operating currk t8c,duwl:sp6 u:)ssent is 1.0 A. What is the start-up current?

参考答案:    
标记此题
74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A DC motor of internal resistance6y t *m/msz7,4il guip 6.0 W is connected to a 24-V power supply. The opera6umsi/*lym4tiz g 7 ,pting current is 1.0 A at full speed. What is the back $emf$ when the motor is running at full speed?

参考答案:    
标记此题
75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A DC motor of internal resistance 6.0 f k0rm) /ig,qrW is connected to a 24-V power supply. The operating c)fri gm0/k,qrurrent is 1.0 A at full speed. What is the back $emf$ when the motor is running at half speed?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
76#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A step-down transformer is needed to reducem9r,symi0.:m mg t +y7t0 ei nl3ryi/d a primary voltage of $120 \; V$ AC to $6.0 \; V$ AC. What turns ratio is required?

参考答案:    
标记此题
77#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  2.0 A in the 100-turn prim 2l(ttj1umqcj c+j 4(xary of a transformer causes 14 A to flow in the seconda+2t qjt(ml j( 1cjcxu4ry. How many turns are in the secondary?

参考答案:    
标记此题
78#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a transformer, how many turns are necessary in a 110-V prima- k; z2nxnu0vgry if the 24-V seconda2;uk0 gz-xnn vry has 100 turns?

参考答案:    
标记此题
79#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An transformer consists of a 50-/uck,:ru.kxv4v15 qgc cpdt0-turn primary coil and a 2000-turn secondary coil. If the current in krk: dgxc./vquucv1,-p4c t 5the secondary is 3.0 A, what is the current in the primary?

参考答案:    
标记此题
80#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  5.0 A at 110 V flows in the btct6p.x,)f+ lgx,eek ih4c q )t.f8j primary of a transformer. Assuming 100% efficiency, how many amps at 24 V can flow i xtblif,8f)c xp .c.keg, +4h6)e jttqn the secondary?

参考答案:    
标记此题
81#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The secondary coil of a ne3 ynqq5 qhiv :y9z/3vqu4u d6son sign transformer provides 7500 V at 10.0 mA. The primary coil operates on 120i9qy/dyuz3v453s q vnu6 :qqh V. What does the primary draw?

参考答案:    
标记此题
82#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal transformer has 60 turns on its primary coil and 3du(u2y98*jafj6 cmv j. lm)ez00 turns on its secondary coil. If 120 V at 2.0 A is applied to te8.m* vf jl a9j2dz6ju()yu cmhe primary, what voltage is present in the secondary?

参考答案:    
标记此题
83#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal transformer has 60 turns on its primary coil and 300 turns on its sec */8,7 hreqq2se oihnuke46hc3vdis 0ondary coil. If 120 V at 2.0 A is applied to0c dh /8qee7u r e nhoi,26q3vh*sski4 the primary, what current is present in the secondary?

参考答案:    
标记此题
84#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The primary of a transformer has 100 turns and its s1itentoq2 jhj 7zz8cz*d1)/qecondary has 200 turns. If the input current at th81dt7j1o2qqzc*ez nzj it/h ) e primary is 100 A, we can expect the output current at the secondary to be

参考答案:    
标记此题
85#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The primary of a transformer has 100 turns and its secondary has 200 8 ebmcf 7jh)*uturns. If the inpu87m )jucfh*bet voltage to the primary is 100 V, we can expect the output voltage of the secondary to be

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
86#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The primary of a trans:. znz xnu)zu4*v*byuformer has 100 turns and its secondary has 200 turns. If the power input to the primary is 100 W, we can expect the power output of the secondary tou4 .n)*nz *yxzbuzu:v be (neglecting frictional losses)

参考答案:    
标记此题
87#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A generator produces 60 A of0b4xtq gz s*v i7i-e5a current at 120 V. The voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 W. Find q7 i0zt-bs5a4 exgv*i the number of turns in the secondary if the primary has 200 turns.

参考答案:    
标记此题
88#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A generator produces 60 A of current at 120 V. The voltage is usually stepp(vd9mzbstfbi n21 b+ibsv12 3ed up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 W. Find the percentage power s9mb113bv n2bdiz(+si2bf vt lost in the transmission line.

参考答案:    
标记此题
89#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A generator produces 60 A of current at 120 V. The voltage is usually stf2-s(x xoa3hnepped up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 W. Find the percentage power lost in the transmission line if the voltage is not stepox3 a-fnsxh(2ped up.

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
90#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A power transmission line 50 km long has a total resistance of 0. xvjl0qn q79v2aa;s1s 32kidx60 W. A generator produces 100 V at 70 A. In ora39ka0jxqsiv vdn qs;7 12 x2lder to reduce energy loss due to heating of the transmission line, the voltage is stepped up with a transformer with a turns ratio of 100:1. What percentage of the original energy would be lost if the transformer were not used?

参考答案:    
标记此题
91#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A power transmission line 50 km long has a total resistance of k3/g c4hmsgyw4vxtp 1hk;en2 g(q2 9x0.60 W. A generator produces 100 V at 70 A. Icw42xnks yvep3/qmgg ;kh x14 t h2g9(n order to reduce energy loss due to heating of the transmission line, the voltage is stepped up with a transformer with a turns ratio of 100:1. What percentage of the original energy is lost when the transformer is used?

参考答案:    
标记此题
92#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  100 kW is transmitted down a 6-W line at 1000 V. How mutr r1i,mr5f kc *m0wy.ch less power would be lost if the power were transmitted at 3000 V instea,kw c.yt01r*r rm5fmi d of at 1000 V?

参考答案:    
标记此题
93#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The output of a generator is 4nxde xq j58)z q*2h0oj40 V at 20 A. It is to be transmitted on a line with resistance of 0.60 Wn)oxej*d5qj2hq 0 xz8. To what voltage must the generator output be stepped up with a transformer if the power loss in transmission is not to exceed 0.010% of the original power?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
94#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-mH coil carries ay5:ax) azdx-vs9x4e e current of 5.0 A. How much energy is stored in the coil's magnetic field?9x vadz)y :ee-xa5s4x

参考答案:    
标记此题
95#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A simple RL circuit contains a 6.0-W resistor and an 18-H inductor. What is thi2lnh, eo k8zkk*n2rx9 s circuit's tim 9,2k*xhzr o2lnn ke8ke constant?

参考答案:    
标记此题
96#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the peak voltage in an AC circuit whxossk2 ( 00ycy hq6 6eeuh ,8qvfucx.:ere the rms voltage is 120 V?

参考答案:    
标记此题
97#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 150-W lamp is placed into a 120-V AC outlet.7ag3q1i 3lb/sqpmno2 What is the peak current?

参考答案:    
标记此题
98#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 150-W lamp is placed into a 120-V AC outlet. What is the resistance of the lakmk .o xk2fxe8e h (o)t6-fd2i7lt tk3mt72em( o.83-idfkx tk x2te6hlfkok )p?

参考答案:    
标记此题
99#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-W resistor is connected to a 120-V al,1o8r uy c)uqc power supply. What is the peak current through the ruq8)u ,c lor1yesistor?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
100#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-W resistor is connecte-l,rsg q037cp ts cdjf xm fj+1(;4dkhd to a 120-V ac power supply. What is the power dissipate+ lxs j,4rfp3g7 jcfd0shdqt m1(;-kcd in the resistor?

参考答案:    
标记此题
101#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The current through a 50-W resistzt)i.h4)ga)k h6 cwx -nenl:t or is $I = 0.80 \sin (240 t)$. What is the rms current?

参考答案:    
标记此题
102#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The current through a 50-W reio-r i+oqqo (4sistor is $I = 0.80 \sin (240 t)$. At what frequency does the current vary?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
103#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The current through a 50-W r+9+;j 1u zgyuzry kz8resistor is $I = 0.80 \sin (240 t)$. How much power on average is dissipated in the resistor?

参考答案:    
标记此题
104#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the reactance of a 0+xb,:dyx;t :eily (j:z zbmj 1.0-mH inductor at 60 Hz?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
105#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the inductive reactance of a 2.50-mH2aev g+0lu2qtp)xp3 c coil at 1000 Hz?

参考答案:    
标记此题
106#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  At what frequency will a 14.0-mH coil have 14.0 W of inductive hos8 o5)2 b 1vikq0hehreactance?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
107#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What inductance is necessary for 157 W of inductive 9:pbx ld, ,awfreactance at 1000 Hz?

参考答案:    
标记此题
108#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What current flows in a 60-mH inductor kn;2bex z-8xf*j -nbt0j1t ly when 120 V AC at a frequency of 20 kHz is app j2 -jyk -1lnzetxnb t*;xb80flied to it?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
109#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the current through a 2.50-mH coil due to a 110-V, 60.0 Hc;tz .ju (2lpdz source?

参考答案:    
标记此题
110#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the capacitive reactance of a 4.7-mF capa3so q/p568 )ra:h6lrh nuxm mr38exslcitor at 10 kHz?

参考答案:    
标记此题
111#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What size capacitor is neede6 (ki6dfgrdg esj8 9y6d to have 50 W of capacitive reactance at 10 kHz?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
112#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  At what frequency does a 10-mF capacitz0, yaqracf2rdow4 ;; or have a reactance of 1200 W?

参考答案:    
标记此题
113#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  At what frequency will the capacitive reactance of a 0.010-mF capacitoso kh3m6xdnz 0 q,i-.nqv)7pdr be 100 Wx- ,omsqk.z)v 6pd d 037niqhn?

参考答案:    
标记此题
114#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the current through a 0.0010-mF capacitor at 1000 Hz and zp/3-0ebf(.ayl)6ddh-:hnwzym1lj i5mb p g 5.0 V?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
115#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the impedance of an ac series circuit wit l;l:e)l* +cfgv d;qleh 12.0 W resistance, 15.0 W inductive reactance, and 10.0 qllgvlf* ;d+ lc)e;e:W capacitive reactance?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
116#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the total impedance at 1500 Hz if az* -/ cs9wxixv 100-W resistor, 20-mH coil, and 1.0-mF capa9xc/x-v *iszw citor are connected in series?

参考答案:    
标记此题
117#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the phase angle at 1500 Hz if a 100-W resistoromp9tlktu,- 1 , 20-mH coil, and 1.0-mF capac9ltokp, - m1utitor are connected in series?

参考答案:    
标记此题
118#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a 1000-W resistor is connected in series with a (lse8td) cu rp+tl20eimj fy6292 vbt20-mH inductor, what is the impedan(6u2ie2crb2vfjem tps0 9 d t)l8+ytlce at 1000 Hz?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
119#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a 1000-W resistor is connected in series with a 20-mH inductvd rp0, f eo5ao(u2.ator, what is the phasevoef 0u.2aa,t dpr(o5 angle at 1000 Hz?

参考答案:    
标记此题
120#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What resistance is nepy/1u xi7,i9gkb 5alb eded in a series circuit with a 20-mH coil and 1.0-mF capacitor for a total impedance 5 9gbib7ui/k1yl ,paxof 100 W at 1500 Hz?

参考答案:    
标记此题
121#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following capacitances is needed in series with a .jnzkf (w0k.gr. 0uls100-W resistor and 15-mH.wnzf(0jk. s.l ukrg0 coil to get a total impedance of 110 W at 2000 Hz?

参考答案:    
标记此题
122#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What resistance must be put in series with a 450-mH inductor at 5000 Hzusfev vuxm r+c+45cda6:x76t for a total impedance of6a5fx:u vm6rd +x+c7uvcse4t 40000 W?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
123#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What inductance must be put in seri-h/33s,s fxdlv 7 eizkes with a 100-kW resistor at 1.0-MHz for a total impedance of 150 kx l, ds/zh 3e7is3vk-fW?

参考答案:    
标记此题
124#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-W resistor is connected in series with a 20-mF cax/aqqva*or:6:7h/aj c t0esypacitor. What is the impedahtqsya0: aqx76/ j aeorc:/ v*nce at 1000 Hz?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
125#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What resistance is needed in series with a 10c-0q 6q*bnq vt-mF capacitor at 1.0 kHz for a total impedabqn 06ctv- qq*nce of 45 W?

参考答案:    
标记此题
126#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What resistance is needeho* wi 4y, 1hvabo/ckcw,.iu4d in series with a 10-mF capacitor at 1.0 kHz for a phase angle yhio 4 vc.c,bu4 ,ak1wh*/owi of $40^{\circ}$?

参考答案:    
标记此题
127#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What capacitance is needed in series with a 30-W resistor at 1.0 ky+zn1 u2 pfiiionchw44l(+ d.Hz for a total imwpn ii2(l4+1d4 hcno .yifz+ upedance of 45 W?

参考答案:    
标记此题
128#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-W resistor is in series with a 100-mF capacitor at 120 Hz.f -i*94 ia+pjumfy 7xc What is the pha -p+ xifcm 9fy47u*ajise angle?

参考答案:    
标记此题
129#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What current flows at 5.0 V and 15 q ,zwf7a,ro9k00 Hz if a 100-W resistor, 20-mH coil, and 1.0-mF capacitor are connect f kro,q97,wzaed in series?

参考答案:    
标记此题
130#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A series RLC circuit consists of a 100-W 5wn7h*0l kmxt6;motw:le lk.9wq 5es3dg8drresistor, a 10.0-mF capacitor, and a 0.350-H inductor. The circuit is connected to a 120-V, 60-Hz power supp75exl;05sd kn*: 9 roge mq8td3wkwhwl .t6lmly. What is the rms current in the circuit?

参考答案:    
标记此题
131#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A resistance of 55 W, a capacitor of capacitive reac)j0b)j+dtznjo xr p;- tance 30 W, and an inductor of inductive reactance 30 W are connected in series to a 110-V, 60-Hz powe0j jb;p )orzn)jtx-d+r source. What current flows in this circuit?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
132#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the phase angle for a series RLC circu; 8 2sr.s haf7cg5 zgl+v1zeytulg60x it containing a 50-W resistor, a 10-mF capacitor, and a 0.45-H inductor, when ch+l0 768s.;zs yzgu5 1av ger 2gfcxtlonnected to a 60-Hz power supply?

参考答案:    
标记此题
133#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What inductance is n,uf)7(d( kyr*otfvi fz xqs 8dus.(x:ecessary in series with a 500-W resistor for a phase angle of i trfx 8f.)z:sf (u,osk*v(7(yqdd xu$40^{\circ}$ at 10 kHz?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
134#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A series RLC circuit has R = 20.0 W, L = 200-mH, C = 10.0 mF. At what freqek( 9sdp5lv0u g-ypv1/ks 3gzuency should the circuit buv -(lgk 510e3p vsk/sy9 pgdze driven in order to have maximum power transferred from the driving source?

参考答案:    
标记此题
135#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the power output in an ac series cihig *++b x;el,+om 9f5zabz grrcuit with 12.0 W resistance, 15.0 W indgb+r5zi blo*,hagmz +fe9 +x;uctive reactance, and 10.0 W capacitive reactance, when the circuit is connected to a 120-V power supply?

参考答案:    
标记此题
136#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The phase angle of an AC circuit i:f,dei: puv p(s $63^{\circ}$. What is the power factor?

参考答案:    
标记此题
137#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ac series circuit has an impedance of 60 W and a resistpsr 54 jw4*gz22 zjkezance of 30 W. What is the power z45 pr4z2e*zgk2 swj jfactor?

参考答案:    
标记此题
138#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the power factor for a series RLC circuit containing aww+)f+ghu2lqn, vd r, 50-W resistor, a 10-mF capacitor, anhd frvl) wnw,q g++2,ud a 0.45-H inductor, when connected to a 60-Hz power supply?

参考答案:    
本习题练习全部题目来源于51fly国际课程 (https://51fly.win)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
139#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the resonant frequency of a 1.0-mF capacitor cbw+tqz4jl9 tj-6 , qeand a 15-mH coil in series?qcjz+6q4t wje -bt,l9

参考答案:    
标记此题
140#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What inductance is needed in series with a 4.7-mF capacitor for a resonant fr 2,z3ra ynpq--b ri4v,mf+byz equency of -y mnb3zv -byr4iz2qfr+pa,,10 kHz?

参考答案:    
标记此题
141#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What capacitance is needed in series with a 3.7-mH inductor for a resonapl 4txh+ zl1r7au2 g0ant frequencyg4l0xl21a at+ uzpr h7 of 1000 Hz?

参考答案:    
标记此题
142#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What size capacitor must be placegh0c,wb(kr by9hj+o1 d in series with a 30-W resistor and a 40-mH coil if the resonant frequen o091hcby,( bh jw+krgcy of the circuit is to be 1000 Hz?

参考答案:    
  • :
    •
    总分:142分 及格:85.2分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题，此次习题练习共有 142 道题

    试卷内容到此结束!   © 2024 51fly国际课程 (https://51fly.win)版权所有

    浏览记录|使用帮助|手机版|51fly国际课程 (https://51fly.win)

    GMT+8, 2025-5-8 07:40 , Processed in 0.681843 second(s), 313 queries , Redis On.