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
本习题练习试卷来源于51fly国际课程 (https://51fly.win)， 为试卷打印版，您也可以在网站平台(https://autoconfig.51fly.win/)直接 访问本试卷的在线电子版并查看正确答案与解析，搜藏保存任意题目到收藏集。 访问方法: 平台首页左上角"通过试卷号快速访问"输入试卷号 80，并点击直达试卷；或浏览器地址栏内直接输入本试卷链接 https://autoconfig.51fly.win/test80.html  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。
 作者: physics    总分: 142分  得分: _____________

答题人: 游客未登录  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 unity +3koy r3v 835qhgjs p zvda-wfa4t9;s of magnetic 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 that1.hoiw 5 5 lzcehzr4g0**jtxm the $emf$ induced in a loop of wire is proportional to

参考答案:    
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 loops-g ha:/8+djy,j rfo9fxb(va 2cvg2 pu of wire in a coil produces what kind of change on tujhyrj822 g9cf,v (xfb da/o -+v :gaphe 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 field through a loo 8y,c3hi;+ rydw 9c01pe;fvaud z2wqrp of wire produces what kind of change on the f;zv2ww8 r;3 ryqa ue+,9ddhcp c0i1y induced $emf$, assuming all other factors remain constant?

参考答案:    
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 a loop of wire produces what kind ohjf.- 6kh7l(ryd kgiy7 er.z1 f change on the inducedr1hg r.7l 7k h.f6-ij(zyekdy $emf$, 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 fro*2uj9x* xic ea6cma;g m a magnetic 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:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  According to Lenz's law, the direction ok/ui 6gajhs/ 5f an induced current in a conductor will be thak/ ihg56sja /ut which tends to produce which of the following effects?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular coil lies flat onegh2+sftl 2 l6ab e1 1t,-5qruegh8t vaf3a(l a horizontal table. A bar magnet is held above its center with its north pole pointing down. The station+l g btg6tl1le2tae,- 2 re58hfhsuf1aqv (a3 ary magnet induces (when viewed from above)

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 table. Amfhu) luvl x6zp3-qu;w;:e s, bar magnet is held above its center with its north pole pointing down, and released. uu3-hl; v lmf,: z; )6uxespqwAs 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 where the magno0ae pp02si v;etic field vector points straight up. The magnetic field vanishes suddenly. When viewed from above, what is the sense ofa2op;ep0v s 0i the induced current in 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 where the magnetic field a(z ,+w4m orqhvector points straight up. The magnetic field suddenly grows strongerm+ rhz,(o 4qwa. When viewed from above, what is the direction of the induced current in this coil as the field 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 table top in a region where the mag+2j/tm88l (qvw qyg ygnetic field points straight down. The magnetic field disappears suddenly. When viewed from above, what is the direction of the induced current in this coil as the fieldm28 gy q8q/jv+(y tlwg 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 wire lies c9le feiwr7md)e8 //wszbd9) 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. Wbfee)m 9/wis ed/ w9zd7l8)rchen viewed from above, the induced current circles

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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 wire with the nortf/v8h t8 0nfgj tg1hn2h pole entering first. As the north pole enters the wire, the induced current wt0nh12 jgnthvgf8 8 /fill be (as viewed from above)

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular loop of wire is rotated at constant angular speed about an ar7 q ,epcs;;5x,mzmyoxis whose direction can be varied. In a region where a uniform magnetic field points straight down, what must be the orien5m,;zq,eprxcy7 som; tation of the loop's axis of rotation if the induced $emf$ is to be zero?

参考答案:    
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 rotated zqq 1:z5 0j -x-mamvtmat constant angular speed about an axis whose direction can be varied. In a region where a uniform magnetic-mq1 -jzt 50qmz:xmva 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. mx-;7lr 3mq(f76 chv-ckd xte
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 that rg- tu7p bh,t(dia(kuq0jk2+ai5ir5 an $emf$ can be induced in a loop of wire.
参考答案:    

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 field.fflywlp6v: 2p.avs6u8i 8tp bp 9-p,w 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 east-west direction) is moved northward at cos aj8 vk5. )a6vfx:aevnstant velvs6.x5:)av8afka evjocity 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 gn3k5 uv4- lgpat a constant 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 generator tra(paxj5q3v jh-lhs 16b nsforms

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 rotates through 60 revolutions each second. The fre.zgt h )9mg;ieoku5kba::ug 4quency of the meua:) ik:go9gz hkut54. ;gb$emf$ 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 devi(chhlho4pcej1p b+1) cjir8, ce used to

参考答案:    
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 devic q/xxntb5kl3m si-/0d e 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 jsv0+ r c6kugr. mug-1coil contains more loops than the primary coil th rks6vg+gurm.-0j 1 ucen 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 contains more loocw nq1r;*3p wum-5 sp.kw sytg)2gxoly64ph3ps than the secondary coil 2wptxohm1 w3;sp-gy6 p ) 5.4ugywrl3* nq kscthen it is a

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a transformer, the pot0f00jm r(ecd;;7lfj amp e/qwer input

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a given LC resonant cic2f.-uoybpu8w s q25l1aq 6 0cc r/jvkrcuit,

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 a(uys h.9 g5zsqn ideal battery of constant terminal voltage. 5su.(yh gzq9s At the moment 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 connectefo;9o jjv 5 3aj7 .e.tdfdn7mmd in series to an ideal battery of constant terminal vo3m ao9 djotnm7.f7je vd .j;5fltage. At the moment contact is made with the battery, 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 is vph:y qtrt856to8 )dmconnected 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 indu*kpe pqf iiat**8(wwou;*a 4fu6 bx:*j rg-tmctance L and resistance R is 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 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 battery. Thg m-u yn)ze n+3q5z9qde time constant q3m)-zzynq 9 geun5+dfor the circuit 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 co+lq-)ag* uim jnnected in series to a battery. The battery is suddenly removed from the circuit. The time constant for of the circuit represents th-+alug)i*m j qe time required for the current to decrease to

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 havx ,((mrw ecmaz f6z91ne the same units except:

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
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, thez j +d0ue: z4z)td5inb current

参考答案:    
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 ldmvwvyzy4i p*oejpr*(49:/ gni9b / power supply. In this circuit, the currentym(zo y/d/v4 4 i9i:n**ejgw9 l brvpp

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The inductive reactance in an ac circuit ghy3 1ur 9i8qnchanges by what factor when the frequen1gryuihn983q cy is tripled?

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 isz qe vh-;n2jhdz:f5i*5qdpr+u -(moo doubled, the inductive reactance of thatjdf+*oqdzin5m(h 2z u:rpo h;qv5- -e 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 vo jq r 9gb/s0v/um9w.yonsz(y6ltage across an inductor approaches zero, the inductb zr0yw/og 6nq .9juvsmy9s (/ive reactance of that coil

参考答案:    
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 connected to an AC power supply. In this circuit, the cugc nh)r 87 pt2( z6.pzz4av;ttn+cfnb rrev 7ph ;cz4a+ z)f.2trnncb g6zp8ntt (nt

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 reactance in an ac circuith.)d ysc1knxa)ms ;k( changes by what factor when the frequency is tri) k a(nshck;1 ydxm)s.pled?

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 *av/vfnb pca2 -kqfb7+ h53k fcapacitor approaches zero, the capacitive reactance /3-v qkc5 b baf+*phka 27ffvnof that capacitor

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the phase angle between the voltages of the inductor and capacitor in a gk9sx p1y1wwqmt00u8ziqm 0 )RLC seri80) 0zwmgx9qq 11ty pku 0wimses circuit?

参考答案:    
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 RLC ci t-r-c 5mu ffb5pon4p(rcuit 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 i :zp on oj;mni:ii:.6circuit increases if R increases. When ioi.i 6i: njmop: iz;n:s 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 circuit increases cr* jkuw1xmy )*7 7c ui4-qviyif $X_L$ 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 circuit. The impedance of the circuit increa 4js +xi .5sx4+nypxjoses if $X_C$ increases. When is this statement true?

参考答案:    
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 grbj0z oj.lruuuq.2)p u5h7v2mh7q0 the capacitance both double in an LRC series circuit, the resonant frequency of that cir70 2 ). ub7r 5jlp.urzq0h uqumvjh2gocuit will

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider an RLC circuit that is driven byrx;(8zmrz2mk 5 fixw4 an AC applied voltage. 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 RLC circuit occurs whkp 8p;y 8 ustm)u1usb/en

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:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
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 is2mbgz5u m 4ab8 rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vectm azb54gmub28 or are parallel.

参考答案:    
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 0.10 m is rotating tf *1( yqiff3aghepw3* 6(vh nkm* fu+in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loopu fq6vief( yaw3 *m(k*p ffh*ght +1n3 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 uniformpa3w i/5wsccb1bu5 e;ajc0.s4 jph 9e magnetic field of 0.20 T. Fin.3;/5j4swb0 p5hcajs cacu9ei 1pweb d the magnetic flux through the loop when the plane 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 single loop is reducedt e./+foe4 g2,wfhrvp 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 changes fromq.lcmp-m7fc ;93h j* gqw)vq z $4.0 \times 10^{-5} \; Wb$ 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 200 tuo;0u 5di7 bxhd 9zfw51qsn 2jyrns 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 from 0.50 T to 0 in 8.0 s, 1qxoh5u bz ns20j;y5 f9 d7widfind 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 with 15 6m 3uc .:qyoflturns 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:    
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 and area w hu de8 1pl)(sarqt(fsi.+1 c9d dr6h$0.20 \; m^{2}$ 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 of 60 m flies horizontally at a location where thfngw88c kt6 n.e gfnkt c8w8n.6downward component of the Earth's magnetic 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 constant a/hnnmpi 3r d-d+std 41ngular velocity of 2.0 rad/s about a vertical axis through one of its ends while in a constant magnetic field of1+3 i nmddtr- 4dhp/ns $5.0 \times 10^{-5} \; T$. If the magnetic field vector points straight down, what $emf$ is induced between the two ends of the bar?

参考答案:    
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-sectional 1q i u-.f1-vfy5b0m3 jad orkgarea 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:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An AC generator consists of 1p 3 jb t26nvbsa3ee.zw;,ez (f00 turns of wire 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. Each9)us5 akcc9wsy6 n zh / v:eym+8wqp7z loop is 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 magnetic field of 0.30 T, which is perpendic)69s7 mawsywc y kz59zq:phv/ 8en +ucular to the axis of rotation, what will be the maximum output voltage of this generator?

参考答案:    
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 26-fcv oq (+onsr* iqdof wire 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 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 Ae6 g2s (v/mqb l: irzu.zfvs+2C generator with an output of 12 V maximum when rotated at 60 Hz. A magnetic field of 0 +r(evm/gq6zsi2: . lub2zsfv .050 T is available. If the area of the rotating coil is $100 \; cm^{2}$, how many turns are needed?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You are designing a genera0(gt03bi/yjvw9 co ,zn en :fdtor with a 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 hd ;2net,lix e0ave a resistance of 6.00 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 resistance of 6.00 W. The motor2oj1z*gi3x ss operates on 120 V AC,s2 o x3sj*gzi1 and when running at full speed it generates a back $emf$ 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 6.0 W is connected to a 24-V power supply. -pa; /jlxy6ey8t+ ar tThe oper;a-aje 6rty/+8 tyl pxating current is 1.0 A. What is the start-up current?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A DC motor of internal resis(39ds86jfv r h lme1pkby n0p3tance 6.0 W is connected to a 24-V power supply. The operating current is 1.0 A a en sdmlh3fpvy k96 1p(80j3brt 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 resclb3f91balrasn :: /xistance 6.0 W is connected to a 24-V power supply. The operating acr s9a::b3l/ 1bxfnl current is 1.0 A at full speed. What is the back $emf$ when the motor is running at half speed?

参考答案:    
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 nek2yeaj7me d:6 eded to reduce 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 primary of a transformeriobl +r 80a8sx causes 14 A to flow in the secondary. Howx0s8l+oair8 b 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 primary if thc9 g7 ;af4 2 4q)bmyt:dmlpiew3wrd/ pe 24-V secondary has 10fy w:d3apmt7;qdw)42mr /e bgplc94 i 0 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 500-turn primary coil d4o* y 0y,dsgyand a 2000-turn secondary coil. If the current in the secoy * g,4osddyy0ndary 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 primary of a transformer. Assuming 100% efficiecp64s6nt0s ).n4) kq clspmkkncy, how many ak 46 t ck)pssnqcmkpsn40.l)6 mps at 24 V can flow in 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 neon sign transformer provi-lyqh) b i2y b*m.gz3jdes 7500 V at 10.0 mA. The primary coil operates on 120 V. What does the primary bhm2b).jgy3ql z y-i*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 300 turfq6cq , lv-1q40kasauns on its secondary coil. If 120 V at 2.0 A is applied to the primary, what voltage is prese 1, 4fkqa0usqa vq6lc-nt 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 la 5iqqv7r z9/on its secondary coil. If 120 V at 2.0 A is applied to the primary, what current iszq7/ riqv5al9 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 transqfnwye2 5)3 jbformer has 100 turns and its secondary has 200 turns. If the input current at the primary is 100 A, we can expen qw)b5yejf23ct 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 transfortv09 qi5mfws5 07xpyfmer has 100 turns and its secondary has 200 turns. If the input voltage to the primary is 100 V, we can expect9p5m ft0ws0fi 7yvqx5 the output voltage of the secondary to be

参考答案:    
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 transformer has 100 turns and its secondary ham 5uv jsqa434if(f,qh s 200 turns. If the power input to the primary is 100 W, we can expect the power output of the secondary to be (neglecting frictional lossavjquq4f4hf,i 3 ( 5mses)

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 of current at 120 V. The voltage is usually stepped 4r9 q,xwi+ c z:ksog:xup to 4500 xo z9,4 i:+q:wrs kcgxV by a transformer and transmitted through a power line of total resistance 1.0 W. Find the number of turns in the secondary if the primary has 200 turns.

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
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. p76 )zgj8 fjokThe voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line7 j 68jok)gzfp of total resistance 1.0 W. Find the percentage power 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 +l)nlnr*eb wd78xt l/euz,d 1A of current at 120 V. The voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total resistancezwd7le8n +t)xe ubl ,ln rd*/1 1.0 W. Find the percentage power lost in the transmission line if the voltage is not stepped up.

参考答案:    
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 0.60 W. Ay ,eto.vq9 yg60,sn2aeu qc h9 generator produces 100 V at 70 A. In order to reduce energy loss due to heating of the trang990 2ou.qn6,csy qe evty,ha smission 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 oft:he nt: ( //kqqy cfuv;3 *q,mmmelr1 0.60 W. A generator produces 100 V at 70 A. In 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 use:enhc mmr yv,q(:/l1/u*kt;qtf eq 3md?

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 l 217 uyun(wdkaine at 1000 V. How much less power would be lost if the power were transmitted at adw(u7ny 1 k2u3000 V instead 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 440 V 943sj6mer k mqat 20 A. It is to be transmitted on a line with resistance of 0.60 W. To what voltage must the generator output be stepped up with a transformer if the power loss in tran3s9remq 46j kmsmission is not to exceed 0.010% of the original power?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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 a current of 5.0 A. How much en4kfxgu.bfn 6 1ergy is stored in the coil's magnetic fi1fnkg46x u.bfeld?

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 sxzqm 0o ;vb1o/3 eyt3an 18-H inductor. What is this circuitbm0y/ 3v o 3tseoz1qx;'s time constant?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
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 circuik1bs yrsb q)./t where the rms voltage is 120 V?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
97#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 150-W lamp is placed intoph4 6awx:3 icp;g kgw f2 y-rxqg9:r9:po- vgw a 120-V AC outlet. 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 wz e)0+qjp+; mp)ux:f dc-cx zof the lamu)f :+ zcdm c -p0)pjxz;exwq+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 ac power supplue k8pof de cf8cv6(.2y. What is the peak current throug.8vf8euo( 6dfck2pc eh the resistor?

参考答案:    
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 connected to a 120-V ac power s* r;,fmfub wq772zr mk,bwu2iupply. What is the power dissipated in the *w7 u;mw7u ik ,frm,2bqzb fr2resistor?

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 resistor is*m oe+p/9aggi $I = 0.80 \sin (240 t)$. 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 5l/9ymd f86mv3rxou s+t0:pvsp l1yqc* 2 .cuq0-W resistor is $I = 0.80 \sin (240 t)$. At what frequency does the current vary?

参考答案:    
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 resist+;z 8lb)qtocc5nt7 tior 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 1.0-mH g7rzk * 3aca,tinductor at 60 Hz?

参考答案:    
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 as9 3a/h sids-w 2.50-mH 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 willzr x9x48.uhr 1ig(tqc a 14.0-mH coil have 14.0 W of inductive reactance?

参考答案:    
标记此题
107#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What inductance is nwc/p:o0s)f g+y5 eb sdecessary for 157 W of inductive reactance 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 when 120 V AC 2o8 /n(pop wyzd1hd(i3xx l/a at a frequency of 20 kHz is applied to ito( 8ol2xxap/z3dd/ n (1 hpwiy?

参考答案:    
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,spqt5klz + d( t,df,v: 60.0 Hz 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 ps64 vk5e*bvm 4.7-mF capacitor 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 needed to have 50 W of capacitive reactance at o.h wzbh5 k4:k10 kHz?

参考答案:    
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 capacitor have a reactance of 5y j,fq2fngp3-so g8u 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 elsb5l.2pip dp rh67j 6;or2aof a 0.010-mF capacitor be 100 W?;lpp.e5 6sr o2p6ralbh7di2j

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 100is fm8a--r3 7hwtzi5a ( b6bdl0 Hz and 5.0 V?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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 wii -84dmcmy9bisj i)eg / .ixg(th 12.0 W resistance, 15.0 W inductive reactance, and 10.0( -8/cgig )i jsx.dm94myiebi W capacitive reactance?

参考答案:    
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 a 100-W resistor;j ;5etp hhlwzof9/)u, 20-mH coil, and 1.0-mF capacitor are con5j;;f ehpuo t9w/z)h lnected 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 resistor, 20dc3r );(ys a0iojk7n.yz 8dly -mH coil, and 1.0-mF capacit syy8dzor c7. 3( nad0;jy)lkior 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 20-mH inductor, what n(or8(fx ospy m8/v7pv((qcd is the impedance at 1000 nr qp(cxdp(fmo8/vyv(( o78s Hz?

参考答案:    
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 q+48r z9i jlm0l edr xzupw2:7a 20-mH inductor, what is the phaqm98r:u+p zrje 7l2l4iz dw0x se 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 needec inze,)gj ;r2d in a series circuit with a 20-mH coil and 1.0-mF capacitor for a total impedance of 100 W at 150; ec,rgzjin) 20 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 10u*j-a*z33toflmp f,pu41gt hj s6fo:0-W resistor and 15-mH coil to get a total impedance of 110 W at 2004* fflt3p:3sj uzt ,omj1 f6g hup-*ao0 Hz?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
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 a 1iq7/rj6rkn 3m*:n; qxnvvs450-mH inductor at 5000 Hz for a total impedance qn1vki sjrar;/nn:* 6xm3 v7qof 40000 W?

参考答案:    
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 p iqvo;:45fmq vefo twt1py +8*ut in series with a 100-kW resistor at 1.0-MHz for a total impedance of 150 kW?fqvoi*1:;4w5 yp oqtmv fet+8

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 co6a x5hk4 5plihnnected in series with a 20-mF capacitor. What is the impedance at pkha556h 4ixl1000 Hz?

参考答案:    
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 10-mF capacitor at 1. 7v9q74 ten);l+hwpnp6 mg udn0 kHz for a total impv q7 gn7h 4l6d tpnn+mu9);ewpedance 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 needed in series with a 1z4h1ns6.o b7s vy b7ml0-mF capacitor at 1.0 kHz for a phase az7mb.o1 n 74h ssv6lbyngle of $40^{\circ}$?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
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 4a. e 0n kk-vy)szbzskc(mwlq21jn 72 1.0 kHz for a total impedanclnmj k170.qsb k-2vnwy2 cs4)za(zke e 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 wmq(lvn s 1y+ny8-ocw(b(yz)h ith a 100-mF capacitor at 120 Hz. What is the phase a(z) l(8csyhbqvmy-yonw ( 1n+ngle?

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 1500 Hz if a 100-W resistor, 20-mH yi97+yc36jss z 0rf3-x orwrjcoil, and 1.0-mF capacitor are connected in serie9 j3z rrfj0isr +ow3syy6c-x7s?

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 resistor, a 10.0-mF canb-dm(h1f bc6pacitor, and a 0.350-H in61(mb- cbfnhd ductor. The circuit is connected to a 120-V, 60-Hz power supply. What is the rms current in the circuit?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
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 reactance 30 W, and a ts:-zb9mq05;vc tnudn inductor of in0bt;tnz9 csvuq5 dm :-ductive reactance 30 W are connected in series to a 110-V, 60-Hz power source. What current flows in this circuit?

参考答案:    
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 circuit containing a 50-W resisfei9(lb :yljna nl-bogl/ x f3((0b1stor, a 10-mF capacitor, and a 0.45-H inductor, when connected to a 60-Hz l 93en falnl-bj/i ( xs(0yof1bgb(l: power supply?

参考答案:    
本习题练习题目来源于51fly国际课程 (https://51fly.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，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
133#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What inductance is necessary in series with a 500-W resistor for a;cvffj psz*8p, :7o.b; b wfpu phase angle o,.cfwb spp:ozfv*; j; fb 7p8uf $40^{\circ}$ at 10 kHz?

参考答案:    
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 hasxl l tjfxw8t+1gk: g.6.sk ej2 R = 20.0 W, L = 200-mH, C = 10.0 mF. At what frequency should the circuit be driven in order e.g:xw6jl tk fsk+ x1.t8jl 2gto 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 circuit with 12.0 W resistance, 15.0 W ;e-(l6e i xmrsinductive reactance, and 10.0 W capacitive reactance, when the circuit is connects(- eemxrli; 6ed 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 os( 11fs(2 mbn is4yi)z9hchucircuit is $63^{\circ}$. 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 cycw:ov5-wov*ch : oo406cyr a resistance of 30 W. What is the py:o5cw- c:c*oc ovo 6hy4wr0v ower factor?

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 conta:aze e7io.ssh-s)an0ining a 50-W resistor, a 10-mF capacitor, and a 0.45-H inductor, when connected to a 60-Hz po0szso :7e .sneaha) i-wer supply?

参考答案:    
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 capacitprrnw )mjn1 -5or and a 15-mH coil in series?5mnrwn1 -)j pr

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 4.2(;ehjk sqct( 7-mF capacitor for a resonant frequency of 10;h jk(q2(et cs 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 reszh g0-wsx0 ; x;lu6wpkonant frequency of 100kguh0; ww6sxz;l-p x 00 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 placed in series with a 3i53 a/;kfqg 9xeyq/vh0-W resistor and a 40-mH coil if the resonant frequency of the circuiix9/;5 /vqfh 3aykgeqt is to be 1000 Hz?

参考答案:    
  • 姓名:游客(未登录)
    •
    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
    本平台(https://autoconfig.51fly.win/)支持练习，作业与考试(自动评分)三种模式，群组成绩统计排序导出，题目动态变量实现同卷千人千题。
    如果您对本系统感兴趣，想加入我们或者想进行任何形式的合作，请加微信 skysky1258

    试卷内容到此结束!   © 2026 51fly国际课程 (https://51fly.win)版权所有

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

    GMT+8, 2026-4-17 07:39 , Processed in 2.814239 second(s), 314 queries , Redis On.