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://autodiscover.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://autodiscover.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 r 00jr;j8.lzg zyj .enof 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 that thl ee 2fzuyf/id: ;i81we $emf$ 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 couo6x3/ j5mqkm il produces what kind of change on the indmj/o5 k6q3 uxmuced $emf$, 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 *pot,s 8x1(e5jpch 17kdjnfgfield through a loop of wire produces what kind of change on the 8gc xsjd1epkt7n(j*1 po5hf, 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 produc3no:ch7wta .g,xp f0 les what kind of change on the induc7 0g.fotwph:nlx3 c,aed $emf$, assuming all other factors remain 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
6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As a coil is removed from a m7 lnqykob*ewia(axym9m)qo38:6 ht :agnetic 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 curre 1dasri rl5pay))6xwm *u-x;c nt in a conductor will be that which tends to pro* mrc)s6a-i1a5r ;)wdx uxpy lduce 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 iswpus0kz2 c/cdhqj(-h ndvd )j +.9p ib. o3h+h held above its center with its north pole pointing down. The stationary m3 puok +hn/9cqhd) zijcdp 0b d.(+-h.vs j2whagnet 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 c.ppf+k+g y :acq8p7jon a horizontal table. A bar magnet is held above its center with its north pole pointing down, and released. As it approaches the coil, the falling magnet ik8f+qypc7 +jcpg :ap.nduces (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 tableqj jsqmd g .i lk16*5o;fk4ro) top in a region where the magnetic field vector points straight up. The magnetic field vanishes suddenly. When viewed from above, whr4gk*o6jd l;qfqij s1o) km5. at 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 region where the ) -n+n da1aeye(h4bnemx /2bt a3 r5qxmagnetic field vector points straight up. The magnetic field suddenly grows stronger. When )br a n/y 5e3 te-adxn2nam41e+hxqb( 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 magnetic f/ (ekz789c eohe6t bupield points straight down. The magnetic field disappears suddenly. When viewed from above, what is the direction of the induced current in this coil asz6okue 8e9(/peh tb7c 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 c;dv, 5cj)yd mxarries an ever-increasing current northward. Two c d,yx;dvj5m) coils of wire lie flat on the table, one on either side of the wire. When viewed from above, the induced current 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 p5g/7 y 89nlhlzky,g eq6 u6fjmole entering first. As the north pole enters the wire, the induced currentufez lh yl5jm7yg986gn/, q6 k will 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 wyjf*18z w.+urchke)q(y3yfen hsfw e8z4 j 2;ire is rotated at constant angular speed about an axis whose direction can be varied. In a region where a uniform magnetic field points straighhyef.hy1j ej qwe uzcwf k(8zf83*4)n2 ; ysr+t 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:    
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 angular speed about a 9u/ he.ar t)db.;5 uxfyo8babn axis whose directobda.u8abbefu) tx/ 9;.r hy5 ion can 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.hp r7r0dsv c6t2rt0l6 h/ry. x
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 i3z r4np3 mnp(3 7idvn$emf$ 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 fie+q )-gyjmm;i cld. The $emf$ produced in the wire depends on

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
21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A horizontal rod (oriented in the east-westl8efo8s q6 u/ o(es7y 6lgxmx+ep6( le direction) is moved northward at constant velocity through a magnetic field that points straight down. Make a sta( g6e eefu/l xom (p6e6o8yx+7q ls8lstement 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 constant angulin a,pw+ipqk/) h yv:o9hk/ c67uk*otar 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 tranu2+l*1 +hgp5y a.l myr)g t4nq cbn,xjn8 xwe;sforms

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 rotatesrmhmrc 2e1u.i3 gc8x inf2dv g.n)o0; through 60 revolutions each second. The frequency of tx..)frn grmdmhu830ci i;2e g21covnhe $emf$ 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 tjz0 /gvm 0hy.48il 2:uyiujleo

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 9oi7qv-sw2egd -gpz ,ce 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 coill-eo 17j/. fzly(61znphji er contains more loops than the primary coil then it i eij6h1zr(y-on j/elfp.1l z 7s 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 coi8juc r a74h*r.. zwpcq0bmvf * wc5cj5l contains more loops than the secondary coil tar f .. h7cq0jpvwmrc*b*zw54juc58 chen 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 power gctygl;(q 48jw6lf+bdkf f;/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 circu /friv vb)*++yz gb8fhit,

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
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 batterykr.qg;m jg:bzr3 e/hr ;c8y9y of constant terminal voltage. At the moment contact is mac9g mry.3jy e; :bq8/zkhr r;gde 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 ind:gpr8 0vg14 dj opbunr;6 jk5nuctor are connected in series to an ideal battery of constant terminal voltage. At the mo;r8:g pnonuj 46k dj 1v0br5pgment 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 res pj8(1 ,/0gezzwk v ln0j+bdszistance 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 with inductance L and resistance R is connecte /k9qe5/bt)/kk)rs1n quxkuswn9e .y d 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 aremco-pre efc st0 ; wh3q6n50p/ connected in series to a battery. The time constant forops0 c3feep6 nm-;0ch5/ w qtr 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 connected in seriesqrk2hkuwkav,:;;vk x)l x 2g, to a battery. The battery is suddenly removed from theka;2lkgv ;uwk,x x2) rh,k q:v 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 have the slti)h4 )b1l 0vj afwapg, 6bp9ame units 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 ci+u2ysbh 5x bx 53nsn8y8ioup s1o.u5 trcuit, 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 todtp7mnyvky,+ stfvb( 7u :;6 3dny6ez an AC power supply. In this circuit, the currenks 6 3efvd,p6dbt;:uvyyny7znm 7t+(t

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 chang+ 9jpr)n lo wh34y7lvtes by what factor when the frequency is tri4ljn9y opv t3w)h+rl7pled?

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 is bt8ny/r a+8)oesid-nductive reactan s yiatobs8-n)r+d 8e/ce 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 inductor approaches zexo(u 6sr4) vh4qs j dtk12/oldlef. (sro, the inductive reactance of that coil rdv(sss e4l1(qu dko.46/j)th xof2l

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 conneyghn in4ul .4k qh6v7g sk589 qfj6dgj88k(fwcted to an AC power supply. In this circuit, the currengjly4f ggvhq6f9748 kn(ki q5s8w.un j 68dhk 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 whp6 vvp9ngzd t 7fqb2q h677f5hen the frequency is tripledz6bpq7gfd 7p6 tv7qf2 9v5nhh ?

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 approache67 aqhqpc y+1fa)knf9 c7cgcawd 1h6;s zero, the capacitive reactance of qchdk yf+1hgqac;w9 nac7 1f)p6ca 67that 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 td3( z- e:frbtehe voltages of the inductor and capacitor in a RLC - :e3tedfbz(r series 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 circuit is defined aso7d+ f 9k0ix uu a7lv(,g(od3o ennd2g $\cos M = R/Z$, 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 if R iiyclzzc+,dn n:7 +s+ tncreases. When is t+c +,c+s:7zn ntlzidyhis 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 oskp zd,:,wocjd r;:-ff the circuit increases if $X_L$ increases. When is this statement true?

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
50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider an RLC series circuit. The imp.o16d 2kfywpp6kwjml(7i 6 jcedance of 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 the capacitance both double in an LRC sericj/x f.( 8(g( bv qabfp6mbve*es circuit, the resonf*m/egajx(( vb8q.b( fp6vc bant frequency of that circuit 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 appliedxioa.+ u8so. z voltage. At resonance,

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
53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Resonance in a series RLC circuit occurs 5ycm3ju 7yai0when

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 is rotati7/mvwg)v kcb -ng in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loopmvc )k -g/bv7w when the plane of the loop and the magnetic field vector 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 rotatxkkv (4-k3jc ling in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when-cx3k(lvk4j k 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 mcad: a jag(t*64s2jnk is 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 fielga 2:cj(sn4aj6d* t kad 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 singli+(j5t; ww- (izmxqvpe 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 changh5nrfdu9 8)ptyt e1iq -uo2gn 7g 2xl6es 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 wiv:2mq7z x,egth me10nth 200 turns of wire on a square frame with sides 18 cm. A unix:n g72v zqem1h,0tm eform 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, 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 witfvqaafx1,d4j k s k:4( (0iqtgh 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:    
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:f/: z5ozboq5wfcn q(1-tcek o4xc g9q:6 mhc 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 of 60 m flies horizontiee6q oi 5v))ially at a location where the downward component of the Earth's magnetic fie5qi6i)veoe )ild 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 a45j8,p yynua blhux5 4t a constant angular velocity of 2.0 rad/s about a vertical axis throunyl j5a44xbuh5 py8u,gh 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:    
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 areaz0 -;l1qq0zuhwl 9qc c:ny6y c 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 oe, 6 v3hq,kp-zvbkq 7turns 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
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 arma7 no *h5yxty.w7 zva/kture. Each loop is 12 cm long y.o7azn5wtv/x ky*h7 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 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 i5ltug3w( x+m6x s5soof 100 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 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 of 1lp26wxhdj/vb8aj 52y 2 V maximum when rotated at 60 Hz. A ma8pxhwd/jy25 bl2vj6 agnetic field 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:    
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 gem-o 5cf(yz : ic)qyx:mnerator 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 DCt4wueq r,53x 4m kk9uzmm0 w*d motor have 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 motor o*h m hty y,adgi,bvd::t87 u9fperates on 120 V AC, and when running at full s atv:8h,7 *fbgytd y9m, hdiu:peed 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 3rtd23y,g g bzconnected to a 24-V power supply. The operating current is 1.0 A. What is th32gdt3,rbz gye 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 connectedj;nx7*c bgi ;10txsvf :l9jdz to a 24-V power supply. The operating current is 1.0 A at xf;1sl 9xgjtz:n dc b*;iv0j7full 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 W is conn4niljo) )3 mmude lxdoo utc; *2d41;nected to a 24-V power supply. The operating current is 1.0 A at full speed. Whao d)m ;d xlut4ou e*inc2om4j nl3d1);t 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 needed to reduce a primary voltage of)l1m8sl7 pa s sxu6t6y $120 \; V$ 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 +1d sqi- ceij-qha4w ;transformer causes 14 A to flow in the secondary. How many tue14qai-;-qj wcd si+ hrns 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
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 thq( h1z8iz yqz8e 24-V secondary ha88(1iqzyz zqhs 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 500-turn primary coil 0e1yd/ u5cr efm.tr591xi fuland a 2000-turn secondary coil. If the current in the secondary is 3.0 A, what is the current in the primalru1.ftx1 / rc 5 fe90uimdy5ery?

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. A 6lw.;cmd;; jmgozfbl io::y7 ssuming 100% efficiency, how many b:fyj;g.d w;o:mlcol; 7mz6i amps 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 providek w.idz5jq*b51vka2f*-. aey8k tako s 7500 V at 10.0 mA. The primary coil operates on 120 V. What doa j-vo*.bkfyt kdqia 1za58wk.e5k2*es 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 300 turns on its seconw,ka.g 52m -ol. qhvsddary coil. If 120 V at 2.0 A is applied to the primary, what voltage is present in the secon v dklsmg5.- q.ohaw,2dary?

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 t-:cjbs-fsmccn6wbrq/i.;m v z(* 6z zurns on its secondary coil. If 120 V at 2.0sn q6b; (mc -rcj v: iz.6cmz*wsfz-/b 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 has 100 turne1atu4p oy1e1( p6 oypl8ci4 h9x-n zcs and its secondary has 200 turns. If thee1xop1e 8no 1(4ylzi6 9uh pyc p4at-c input current at the 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 hcmq7nu9hgd 9 k ..rz)las 100 turns and its secondary has 200 turns. If the input voltagc.lmh kr7un zg9)q.9 de to the primary is 100 V, we can expect 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 has 200 lir0 gjg(pb5qwy*v x. 6ou m(an18e,uturns. If the power input to the primary is 100 W, we can expect the power output of the secondary to be (neglecting frixve ga upq.w yol(ngru51 bi0j,(68m*ctional 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
87#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A generator produces 60 A of cod* r;vcvzsxu7wru0a4,fxrt.8; f 4e urrent at 120 V. The voltage is usually stepped up to 4500 V by a transformer and transmitted through a puv as.,;7x*dfv8 orzw4u04;e rrtcfx ower 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:    
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 currenwwk2zqik -bnx+h.st(pqe4 kc. l4;g;t 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 pktk heiq (x.;;qp+ 2wl4- z4wbskc.ngercentage 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 A of current at 120 V. Thwy.o++mtc+nb i-; grfe voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total resistance t++ wyfibnm.-gc r;o+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 a,wli*o- g3t-kfu0 e e0.60 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:w-,lgo0 *euf ti3ek-a1. What percentage of the original energy would be lost if the transformer were not used?

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
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 to,-y(xzlmp5opiq)dbl w6dyor) 2gs5- tal resistance of 0.60 W. A generator produces 100 V at 70 A. In order to reduce eilp2dqz y)gy ( owr-bo, 65x-sp5dl)mnergy 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 * (gqvhh-4bxm V. How much less power would be lost if the power wevxhb g* -qm4h(re transmitted at 3000 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 Vj2pp 5m,-b i+7o(jxdcf;w d;mzyg u3+ zlj4or at 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 the3+ i c2z7f5lzyj;w p-bjo+( 4uoxdpmd,rm; jg power loss in transmission 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 / l,z :-7p;b) ilxddqozrc r5ra current of 5.0 A. How much energy is stored in the coil's magl57p/) :d;i r rloqdc,bxzr- znetic 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 ly9gluvgh.id bjg.:),i4 :w yresistor and an 18-H inductor. What is this circv .igh)l,jy4 ub ydwg:i:g.l9uit'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 voltage in an AC circuit tsm*(dmdfkkw 17 /te)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 a 120-V AC outlet. What i jhp) ncl:/gbtgl r864s 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. Whacgl7 yx*vy7uc 9n+ 1qmt is the resistance of the laxy97lymg * uvn c17q+cmp?

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 supply. What is the peak currtwoc *cu-l ;.ient ;*-cl otw.c uithrough 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 supply. What is t/:fw* w 3o- 0dlo dgimrpz jbc-ywg8,gh(h 0b.he power dissipaid f3dbw. bgho, 8(jgpych -zow0 *r:m -lw0g/ted 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 resistor h (jkzx f -eif)m:67amf ocew6q9 /,icis $I = 0.80 \sin (240 t)$. 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 resistor is vuyx l;x9mi*: 7)(f 1yvjkea*m j(ejx $I = 0.80 \sin (240 t)$. 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 resistor xh/zjz q 8/801+lrwak pcn;puis $I = 0.80 \sin (240 t)$. How much power on average is dissipated in the resistor?

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
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 inxy e/zdw7* /9b o)h*hbm3ycn(gb+rd b ductor 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 dv*f lro: tg30 thz4k. dyqb;9;gv 8uuof a 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 wilyjac iyc zr )q6y(2(itpjvyo :av+7+z7 u9i4 al 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 necessary for 2hxf5 7mx884eoh uqm4 nuse/l 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 at a frequency f- i)d*q+qmwv of 20 kHz is applied+wm *v)f-q iqd to it?

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 dv2y;28yidk f mue 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*sc(p /d 3m9jibe5ca m of a 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 capacitu9/:9t h9/h2vzut mpm -xrfqaive reactance at 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 have a reacta0zzvi wg8mv-jdig3 u 4i5*z6v-jv-flnce 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 ca +lf ( ft*a80lfvi:z/vuj3iqvpacitor be 100 W03ati*f+f/ uv vql8i( fljv z:?

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 5e.10 soh gjbbe7sk5 r0.0010-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 resistance, 1jmb a+rg-f0p 1hpi 6t/5.0 W inductive reactance, and 10.0 W capacitive reactance?apm+ p0rfib1j6 h /t-g

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, 20-mH coil, and 1.x3 :a3r/ e+axvo dcgu+0-mF capacitor are connaa 3cvdrexu+g:o+ x3/ected 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 1060le t3v2u.w byguu g o/;6tea0-W resistor, 20-mH coil, and 1.0-mF capacit/b uvt2o6e ywa3ug .l 06teg;uor 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 iojkf 23a) c(z9 y/mtj1yb3jifs connected in series with a 20-mH inductor, what is the impedance at 1000 )oyyb2/ c3( m t1ajfj3zfi9kj 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 serieri0gn2mhfge 1 6 (o6his with a 20-mH inductor, what is the phase angle at 10o 1hghi e2fr(n0g6i6 m00 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
120#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What resistance is nu3 8w(6 pwmfpveeded in a series circuit with a 20-mH coil and 1.0-mF capacitor for a total impedance of 100 fpv p(3w8 6wumW 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 y s27m 7k) 7m snd-cba*)grqef100-W resistor and 15-mH coil to get a total impedance of 110 W at 20 r k7-msea cnqg7y*ds2 7b))fm00 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 ia1glx+ 6-vnesysx -2unductor at 5000 Hz for a total impedance of 4000ny-61xvgue sl +a-s2 x0 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 for a tog:kzpv)o pl7:9on p)8u. rjn stal impedance of 1)s lzpnu o9prjp kg.v7 o::)n850 kW?

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 witw (6 y6,txt1js3 zckclh a 20-mF capacitor. What is the impedacc66k 1 zs,3t(txwj lynce at 1000 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 akuv;o mws69h 8t 1.0 kHz for a total impe;s wk6vom9h u8dance 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 10-mF capacitor at 1.0 kHz for)wdop:+u,dy6u9 m tc3x ex.te a phase ang yw cdu6xou:9ptte+x em3.,)dle 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 inm rjxf)a qsjq(6a.;cva0w(8 g series with a 30-W resistor at 1.0 kHz for a total0raq;(gaxcs qj) f.v8m(jaw6 impedance 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
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 10 .n7lm nkz)pd2k0+ dik0-mF capacitor at 120 Hz. What is the phase angle ndikp+7kl20)d z .knm?

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 1pm-l 4kgx4)g 5jfp e.vzd. p+t500 Hz if a 100-W resistor, 20-mH coil, and 1.0-mF capac vt.) jpd+4e4pg x zk.lfgpm5-itor are connected in series?

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
130#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A series RLC circuit consa5 x6 i+f*cdf:rejt7tists of a 100-W resistor, a 10.0-mF capacitor, and a 0.350-H inductor. The circuit is connected to a 120-V+f i65 tdx7*tr cfae:j, 60-Hz power supply. 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 reactance 30 W, and an induc, )4m3bl huxw,vt -8swu )ebfetor of inductive reactance 30 W are connected in series toexuww t8s ,b-mvlfb), h)e43u a 110-V, 60-Hz power source. What current flows in this 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
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 g zgjkiyc,*wcddsx)* 7afb 2g8/x1i1 a 50-W resistor, a 10-mF capacitor, and a 0.45-H inductor, when connected to ,i dywc1k*j1gzf/ s )c gbxgd8x*a2 7ia 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 500-W r n gm30sqji2cs9 yneegg/92 2zesistor for a phase angle ofsm ei9ezn29yn2 2/ j3gqsg c0g $40^{\circ}$ 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 = 10.0 m ,b0x*ytl .+haq;yer +owph4 9jl/ vknF. At what frequency should the +x, *vjqy9+y/ ;hlp h4e0 wb.arlnk tocircuit be driven in order to have maximum power transferred from the driving source?

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
135#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the power output in 0w,7ie 8owk xxan ac series circuit with 12.0 W resistance, 15.0 W inductive reactance, and 10.0 W capacitive reactance, when the circuit is connected to a 120-V powe8wx7, exk 0owir 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 1swknpgch::trlvdh w(j 6 nxq 8/)+9icircuit 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 a d-fsd/x) /b z+dlm1j7rlx bm-n impedance of 60 W and a resistance of 30 W. What is the power fad-bll m m7fr1//j-xds)b +zx dctor?

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 conto.-hv:7btbd38y fhu vd. ad()v7jrx waining a 50-W resistor, a 10-mF capacitor, and a 0.45-H inducthyv w7ubv a):fbxrht d-8d3vd oj7.(.or, when connected to a 60-Hz power 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 capacitorx-)4c j or7rdo and a 15-mH coil in series? r7 4jcd-xoo)r

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 f6ydzk9/d 7b (+xll a l4ot5kfsrequency of 10 kHz?lllzkd9 x7ka+t oy/645fb sd (

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 rqj8:pgvw2 bgx;sm7mxz f)bt.f b ( )7nesonant frequency p ;fqvtxbfb(8 27zmj:sbg7m).)xwn g 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 placed in series with a 30-W resipz/ee ;m5 v9nyfq q;sd8pgv q7,f4*u gstor and a 40-mH coil if the resonant frequency of the circvv 7/9*ep ;y , 5ggpfesn4 fqz;qd8muquit 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://autodiscover.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, 2026-4-18 06:29 , Processed in 2.827173 second(s), 314 queries , Redis On.