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://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://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 units of magnetic ff);0t )pwk t m501qx:lwdmhfr lux 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 sta7huxus(88 mf0 ns x2jbtes that 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 of wire in a c-uqn +) kmww3aoil produces what kind of change on the inducedmkwwq+ n-u )a3 $emf$, 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 loop of wire proyt/4 dec57nch duces what kind of change on th4n57e d/ctcyhe 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 v7d,4mcmxlhlsi 7e+; kind of change on the induced s i,m4;+hdx ll7 7cvem$emf$, 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 frok8 zaff95e mw7fbit/ ,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:    
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 current -y6xk0) m iajdin a conductor will be that which tends to produce which of the following xm-6ja)yi dk0effects?

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 itsw xi382+-rm pc+bvoht center m8o+3rpcith2w+xv-b with its north pole pointing down. The stationary 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. A bar magnet is quqsrimn/sda :4-6byo 8y /w5 held above its center with its north pole pointing down, and released. As it approaches the coil, the falling magnet induces (whiq:qm4y rsob yna /du- 85s6/wen 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 table3efh2g0t yi ,oqu1rx:p k7vat/.psg 9 top in a region where the magnetic field vector points straight up. The magnetic field vanishes suddenly.g3 rpte9yx fp 0q iuo.ahg1,t2:kv/7s When viewed from above, what is the sense of 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 knryi n-,3wd. mr b o9kz,.i*qregion where the magnetic field vector points straight up. The magnetic field suddenly grows stronger. When viewed from above, what is the direction of 3wboy .kdrn.,9n,q irim-* z kthe 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 magnetis6sk4s ,to rg3c field p634sst ro k,sgoints straight down. The magnetic field disappears suddenly. When 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 wire lies on a horizontal table and carries an ever-incre9wv3h* xs b,vsdu:o9 gasing current northward. Two coils of wire lie flat on the table, one on either side of the wire. When viewed from above, the induced cur3 dwo shu vx:sgb,*9v9rent circles

参考答案:    
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 north pole entering cy jape/7oxcj8p,ci4cg0 d( 6gxbe, 1first. As the north pole enters the wire, the induced current willegx(x je o,c16b4i, gpcc8p0/yacj7 d 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 is rotated at constant angular speed486)kfmfb9ph 3c r ocm about an axis whose direction can be varied. In a region where a uniform magnetic field points straight down, what must be the orientation of thec 9mr8h3fomb46c)p k f 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 at constant angulro74 epq)2fn xar speed about an axis whose direction can be varied. In a region where a uniform magnetic field points straight down4o)7r fe2 pxnq, 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.b1btuam x*go:e /xlln jip09vx */0o,
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 an )7.gkf shxtj0onc* .o$emf$ can be induced in a loop of wire.
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xxxxxxxxxx，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
20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A wire moves across a magnetic field. The x2v1ng g)h1 vk;am5 wu$emf$ 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 5jndy+ v++x qefsnt6m0 ,r an)east-west direction) is moved northward at constant velocity+5n draft0y 6)mv+nnesx,+jq 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 npia3.gz t2 6ja 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 transformk6i14gf1 a-m77 xiu shx )mtjis

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xxxxxxxxxx，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
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 freqq7;6 sh vf2hyhuency of thhy2hvf;s7 h6q e $emf$ 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 device used ydf srn8ms(. 7to

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 devi*3k wio6kvcfm(e9c 01j3ahea+y d* c pce 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 3wlzet rn0 ia6 h* nmrpg5n)5a:czp04the secondary coil contains more loops than the primary coil then it is 0g6paen)tlr zi rahz45c*3m0wp:nn5a

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 :smq t9 rzz4m0loops than the secondary coil then it:szm mq4 r09zt 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xxxxxxxxxx，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 powes,*d,me ea u0kr input

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 cic kg5qp1wqb6 j3 3f,nnrcuit,

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xxxxxxxxxx，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
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 ideal batt sgt ndrw0*d /u9l:/dfery of constant terminal voltage. /0wdf: sltu/9dn * rdg At the moment contact is made with the battery, the voltage across the resistor is

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xxxxxxxxxx，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
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 an ideal batteo ;vlu7 9+1qe8ozc av +7vbqmdw;t q;kry of constant waq; odu+t ;ck8mvboev1qz 7vlq7+9 ;terminal voltage. 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 ir *wht uh/m8nf32 .fkresistance 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 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 withz,h2c;rs+n es:fhymuu6 0i 9p inductance 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. The time coo s )ykxn o16qjuc906znstant for the circuu js)16ox ykq c0o9n6zit represents the time required for the current to reach

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xxxxxxxxxx，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
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. The batterd+ 7i 1ltf0;esj2zaeehcg*lvg e p,ki; b-( r6y is suddenly removed from ts1eveit c p g7k6ree2a*0-l+izj , b(;fghd;l he circuit. The time constant for of the circuit represents the 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 hatx,wgg+6htb)75o +mar p-y vs ve 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xxxxxxxxxx，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 4 :-5wnmr5lmx cwx qm/power supply. On this circuit, the 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 power suzj/okmgf/l-g 1cyo4( u /l/de pply. In this circuit, the currenlk(o //y-eum zdcgo1fg//4l jt

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 qc9w yc0/ bf,ffactor when the frequenfyc w/fq, bc09cy 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 acrosnbs5a sjqb 32h56urg6s an inductor is doubled, the inductive reactance of that 5ur 6b235 gqsjshba6n inductor

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xxxxxxxxxx，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
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 inductor apprada04zr 4 c;o1t+mr b h/o2xjqoaches zero, the inductive reactance of40zxmo+bh;rq21atr4c j/ d a o 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 su3lbhaa;(k knlp/3c a2 l3+cva pply. In this circuit, the currenk3;3al a2ba+acncvl l3ph (k/ 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 reactance in an ac circuit changes by what factor when the frequme gx4 27doau+enc4axmuoe7 2+d gy 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 capacitofd8db/we i gabmj ;935r approaches zero, the capacitive reactance of tb/ j g;d89 efwbadmi35hat 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 between the voltages of the inductor and capacite9c du/4 w5 4-5bwk f0skf,fafowju2xor in a RLC series circuit?d w-kw5/wf52ex4c fafk4uojs 0b,9 uf

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 circuit is defined a5; 6*: (cftpactpcmvejvg*p.y * qx x:s $\cos M = R/Z$, 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 3uy l pdh6+-l7z otwe)of the circuit increases if R increases. When is th y poudl)-36+z l7wtehis 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 fn: -3isdoqtw :b*jhv 80 wi(wzc4wu k-7s*v pcircuit 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 circuit. The impedance oi5n(rpouhfrw:7 i0a+f the circuit increases 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 tz 3qyd:3 n7k- hec gaw,da1z-khe capacitance both double in an LRC series circuit, the resonant frequency of that qck-y7:wad-ke313 nz, ahdz gcircuit 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. r*a7asf65qdf 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 whf80x9dao5hj d 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:    
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 rotating in a5 * nn)lshu0rr94e :px gcxz)p uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are rze:g 4nshx0rx)lun)5 pc9p* 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 in a unklcu ktjr(-e 5 fkk8p09y6l4e)h4j wqiform magnetic field of 0.20 T. Find the magnetic flux through the look-89ljrk0tq (y64 hke wejcu4kp l 5)fp 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/ lfv zfle3pu27z gc,1wg.0qy in a uniform magnetic field of 0.20 T. Find theflylqgp31 gc7ewv,zfu0/z2 . 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 reduced fo *jhxekt vv ah;fh9g+b*8j*0rom $1.0 \; m^{2}$ 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 chank5 ed2t 1 sctqx*7ghn+ges 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 20 :+3zbz9rajb a0 turns of wire on a square frame with sides 18 cm. A uniform magne+3bzaa:j9 zbrtic 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, 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 with 15 turns and an amxwj zj.4 okl7;-c(, 5gvvbwprea 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 a -3p0e)opuvdf)bw jjtx6y mbn4v8 4v /rea $0.20 \; m^{2}$ 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 flieso csel5gc w.r g97:6avh;kku. horizontally at a location where the downward component of the 5; krc:cg6s.vk.eh gl7u w9oaEarth'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 rotatep:a,wlgz)szvao,3s/iu 7d)x 65z imos at a constant angular velocity of 2.0 rad/s about a vertical axis through one of its ends while in a constant magneas3oisla,x,zw 6 dv 5zp):o/m)gz7iutic 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xxxxxxxxxx，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
65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The coil of a genera)9 (ynqwegs* p9o.zpstor has 50 loops and a cross-sectional 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 11neiw+ rrs(9y6vyl jue2gk+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:    
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xxxxxxxxxx，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
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 loopj+wvq tyu,f2 b/)1hut 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 perpendicular to the axis of rotatt hq1v)y/,f+u twj2 ubion, 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 o clmpy4(rt2)1 kuc)gpf 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 AC generator with an output ofj1(dkp 7+e byf 12 V maximum when rotated at 60 Hz. A magnetic field of 0.050 T is available. If the are(d1fk p+ 7bjyea 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 gel a1:2)sxwf7dprg )rww0q j7pnerator 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 have a resistance of 6.00 W. The motor operatesnf. 6lgmlg *6e 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 s;n)5fd ght 9wW. The motor operates on 120 V AC, and when running at full s5s)dg9 hftw;npeed 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 1r bzw8+b 7u1mryzmt9is connected to a 24-V power supply. The w1 m7m 1b+u9 8zrytbzroperating current 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 resistance 6.0 W is co uz.5cm7xkh8e6f el,qnnected to a 24-V power supply. The op8me7ckf q.5z6 l,uh xeerating 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:    
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xxxxxxxxxx，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
75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A DC motor of internal -uko-*1 )y rbf)odtnpresistance 6.0 W is connected to a 24-V power supply. The operating current is 1.0 A at full speed. ndr)-opk)1fb * t oyu-What is the back $emf$ when the motor is running at half speed?

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xxxxxxxxxx，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
76#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A step-down transformer is nee-bli) qifbw*t0z ha-w 51mdr*ded 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 transfor7ms( ufsm)m3rw3j 4ypmer causes 14 A to flow in the secondary. How mruwm 3j(sf7)sm 43mpy any turns are in the secondary?

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xxxxxxxxxx，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
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 the 24-V ay65kkr:sxk:l n :4hgsec:g k6:sy5k ka: 4nxhrlondary has 100 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xxxxxxxxxx，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
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 9)t h37.by+cbzp owvf and a 2000-turn secondary coil. If the current in the secondary is 3.0 A, what is the current in the p p)o7.whcbf3t bv9z +yrimary?

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xxxxxxxxxx，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
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%fhdccz/g7zd :et+,2yvvx+; o efficiency, how many ycezc,gvzh+ f+v2 7 :d;tdx/oamps 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 pro6ta*oehq+v p9hp8gg7t( qu8io ( oxp,vides 7500 V at 10.0 mA. The primary coil o ahqh8e7(i 6uxp *o q98t vp,tog(gp+operates on 120 V. What does the primary draw?

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xxxxxxxxxx，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
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 t1l m/4fyp(to9x*txxt9 vz6 fc urns on its secondary coil. If 120 V at 2.0 A is appo1c9pfl vx69t4z(fytxx m/ t *lied to the 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 5 :wo(nn--mhenq syu. its secondar- :m.oe s(ynnh5wnq-u y coil. If 120 V at 2.0 A is applied to 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 h ia:e6 j2j/o2uz2cwq+wqej n 2(dmyn2as 100 turns and its secondary has 200 turns. If the input current at the primary is 1(2: 2c wj/+q2jmuqaezn 6dnoy j2eiw200 A, we can expect the output current at the secondary to be

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xxxxxxxxxx，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
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 turns9f z4zbswubr ezy( iu-u 8(28n. If the input voltage to the primary is 100 V, we can expect zz es8biw94yzrb( f-n82 uu(u 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 tuq hd1rqlkuxnq.i7-2 iec a*,1 rns and its secondary has 200 turns. If the power input to the primary is 10 -qn.aqildxe*,21riku1h7 cq 0 W, we can expect the power output of the secondary to be (neglecting frictional losses)

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xxxxxxxxxx，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
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 ioa):d5u aydjv-i((xfaet-kt;6( b q voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 W. F-:j(a -dk( iytitd ba()of;5 x aqeu6vind 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 kufeu 9,l. nm:V. The voltage is usually stepped up to 4500 V by a transformer and transmitted thk.9elm: , ufnurough a power line of total resistance 1.0 W. Find the percentage power lost in the transmission line.

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xxxxxxxxxx，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
89#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A generator produces 6gc)dv 1x8 lh4 eeez(t/0 A 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 resistance 1.0 W. Find the percentage pow( lexd/vt e8eg4c1 h)zer 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 har k-la3:hoo*ts a total resistance of 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 would be lost if the transfor o- :*rt3aolhkmer 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 linex0sa,izf5mt t7 qm49s 50 km long has a total resistance of 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 ori i4mt 9ms7,ztaf0qs5x ginal 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 tg rddk)yuqyk:jwmu w2y* i-, 4 /44eyline at 1000 V. How much less power would be lost if the power were transmitted at 3000 V r/wyy,jg4udkk):- tm uq 2 yi4wyd4* einstead 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 at 20 2fc(/;a *kpslv48 d6led txjtxas :x;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 transmission is not to v8fks;dtxx2:scal/* txd( ae6 l; p4jexceed 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xxxxxxxxxx，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 mucng8 lw/ uj5.yah energy is stored in the coil's magneti gl85w jy.na/uc field?

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 induv fi)iqnv+u+ 6ve-4 ractor. What is this ciina6qi+vu- re+v v f4)rcuit's time 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 voltaget *.b9hi2p;vies /dl5 u5oicqud pj,7 in an AC circuit where 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 :qz6e 9fcbb79.y1 f(;cu7dlydvdg hq a 120-V AC outlet. What is the peak 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xxxxxxxxxx，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
98#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 150-W lamp is placed idtwbfjuf+q)qtx*b; *uw *69i nto a 120-V AC outlet. What is the resistance of the lamp?d *i+b)xuqw ;t jt*fb9fwuq6*

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 pos w1w*n/py+b5o ps )ezwer supply. What is the peak curre)wsboz15s*+ p pwne/ ynt through 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 su ifix(ehkq a+03;d ,mspply. What is the power dissipated in the ;kq+dsfiie ma, (hx03resistor?

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 jedb/g/+o n6e wio7+s 50-W resistor 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 resmtfmckn, :xv5 (wx/ i-istor 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-Wvb6 c+3,.pjk2 lqfqmh resistor 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 reactanceuxwpr/bpun27 p/m((i of a 1.0-mH inductor 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 a 2.50-mH coil at 17 vqbcgxvb1:0 000 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 reactan5mr :. s /(niur4tctlnce?

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 necessary for 157 W of inductive reactance at ca+5fr:ggm 6*1mxgh 9 4 daw 2w/hhrwt1000 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 at a frequency of 20 koa)qy/t.bfs -l;d :emkn0 ;zaHz is applied t-eyo/.mas 0)zb kqadfl ;n:;to it?

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xxxxxxxxxx，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
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 coiwr fp ;7-v)d+ex6f fkml due to a 110-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 4.7-mF capaci*jl me0bg eo;56o au46iq3 ntbtor 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 a*+g8b jcvfp*kfuco c( c5ne3,t 10 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 9)fjiv,8w.9de0-fd vefquf rhave 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 capacyf.6 8ntgkv6bbwot q2,s nt9 4)ml :yxitive reactance of a 0.010-mF capacitor be 100 Wv8kbt , f:nnt)l 6y2t 6 ywq9o4b.sgxm?

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 througs,-o a ;zhqwh2, stsh)h a 0.0010-mF capacitor at 1000 Hz and 5.0 V?

参考答案:    
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 with 12.0 W re65ege09 k5ulbeme- ai sistance, 15.0 W inductive 6le-5em5e0ub9a ikeg reactance, and 10.0 W capacitive reactance?

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xxxxxxxxxx，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
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 2g/ qmke. lma4if a 100-W resistor, 20-mH coil, and 1.0-mF capacitor are e/.lag2qm4 mkconnected 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, 2 dm,nx0p bf)cfq-ev3l5hr6 voaz 2 /lgrnl-.10-mH coil, and 1.0-mF capacitor are connecrlbv q l - a cd5hff-v6 210x,ln.)rm/oz3pgneted 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 mj9,u*g 2 9sqbf0zjwf is connected in series with a 20-mH inductor, what is the impedance at 1000 q0z,*gf9m9uj fwj2b s 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 h bj-+dl ,404gnanuwj is connected in series with a 20-mH inductor, what is the phase angl0jd ,4lb+h 4nngjau -we 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 needed in a series circuit with a 20-mH coil and 1.)v5x.k xke*igub q5uv 68)c vq0-mF capacitor for a tu)veu g)5xvb5xq.8 ki6q*vkcotal impedance of 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 ng)tx.m9h 3d g5b+r3d pbs8qii eeded in series with a 100-W resistor and 15-mH coil to get a toti db.g rh x3pbiq93mt+ )58gsdal 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 Hz foro o3h f 2e3p(4jvpxe*i a total impedan p3xf oi *(je342oehpvce of 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 put in series with a 100-kW resistor at 1.0-MHz lpxi *rqqs9fn/ 9b4g 0for a total impedance of 150 k* ir9f4x90/sq qpg lbnW?

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xxxxxxxxxx，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
124#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-W resistor is connected x;r;f3 hi7lpd in series with a 20-mF capacitor. What is the impedance at 1000 Hzxhpf;3i7 rd;l?

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 az.za+nn c rkc 2:n3m9pt 1.0 kHz for a total impedance of 4r:a+9pnkc23c.m n z zn5 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 10-mF capacitor at 1.0 kHz for omk t4t.( j/i*nul f0da phase angle of dflk*0iott(m uj.n 4 /$40^{\circ}$?

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xxxxxxxxxx，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 1.0 kHz for a totaro;+r +-.2ps nkhgaga l in2 o++kpgrs; -gh.raa mpedance of 45 W?

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xxxxxxxxxx，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
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. What iqxrso h1h+ +)ds the phase anohsh1xr )+d +qgle?

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xxxxxxxxxx，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
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 vwnljt** n:.t )gh6edif a 100-W resistor, 20-mH coil, and 1.0-.* wg *vnln)t: dej6thmF capacitor are connected 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 resistor, a 10.0-mF capacitor, ank;bpp3o,tgzx-.g eom:pj zas/ um+b)5 6*zt yd a 0.350-H inductor. The circui ,jt5)zp x+3-*:gozbt/zb6 ok ;ugsa.ympem p t 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xxxxxxxxxx，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 reac3phojose ap .v rxt*1( .m:elqr -e:u1tance 30 W, and an inductor of inductive reactance 30 W are connected in series to a 110-V, 60-Hz power source. What current fleqv*orxl3eou .1 e.(h1p-rt:j:mpa sows 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 containingxg 0 +h6p7ixyo a 50-W resistor, a 10-mF capacitoro0gyih6 7 px+x, and a 0.45-H inductor, when connected 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 necessary in series with a 500ymsh4j 4u (.n 1-x78ule gqzro-W resistor for a phase angle o zx44 8se7q1 uyn ojm-rul.g(hf $40^{\circ}$ 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 has R = 20.0 W, L = 200-mH, C =kni.f v+ek0 z(zb,digfxs 678 10.0 mF. At what frequency should the circuit be driven in order to have maximum power transferred from the driving so(7 fidv6b+0i fnezs8kg, zx. kurce?

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 seriesylwr79d2 (;a(wla yfl circuit with 12.0 W resistance, 15.0 W inductive re9(l;( ardwwlf a2y y7lactance, and 10.0 W capacitive reactance, when the circuit is connected to a 120-V 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xxxxxxxxxx，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
136#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The phase angle of an AC circx2. j1 2txife 6w8jwislt,2kz9a+k jduit 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 )y+ezpmz jl -,v)jn.nan impedance of 60 W and a resistance of 30 W. What is the poe+njzp lyjnv, z )m.-)wer 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 R8dw 6(zj uah;r*p .yk13nqum xLC circuit containing a 50-W resistor, a 10-mF capacitor, and a 0.45-H inductor, when connected to a 60-Hz power kqa1x(8u du36zrn;yhmjw . p* 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xxxxxxxxxx，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
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 and a 15-mH cib13 cp7btm c7 n2ao8roil in series?c7bp13mt b 27inrac8o

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:b c (vrtic5t 5 b1ik ksr6*swr)t,mf* a resonant frequency ofrc tbm tsi6t(5 * sw:rk, k)bv5*ric1f 10 kHz?

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xxxxxxxxxx，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
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 znkyzcksndf -k5;y )/va x(hc8+)9irfor a resonant frequency of 1000 Hzk ysx+ 8drfkic(c)9-avhzn)z5 ;/ynk ?

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 30-W resistor and acxxuy 7vbzn(ru.nrso /2; e 89k8 ob;t 40-mH coil if the resonant frequency of the circuit is to be 1000 Hz?(;7 tzb uny oxrsnb8 .x2/cuv;9 8eokr

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

    试卷内容到此结束!   © 2025 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, 2025-11-5 07:01 , Processed in 2.063936 second(s), 314 queries , Redis On.