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习题练习：Physics Unit17: Electric Potential
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 作者: admin  发布日期: 2022-08-15 14:49    总分: 75分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月15日 14:49  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is n0 e c q9n4hkpttf,l2w*ot a vector?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomb isj hm2 2lpf3e8c a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objects are insulatedln/c /7)c hocwm*.o je from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Whicm/neholcjc/ocw .)* 7h object is at a higher potential?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For a proton moving in the direction of the etbl07 wgzwor4n3 kovgu/;itn ga7; .)lectric field

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For an electron moving in a direction opposite to the elect3* ,mlrgf/g.97a -k a ntxbkrhric field

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons are plac15auzbr-d) (uy) l znm:um-co ed on a hollow conducting sphere. They

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A small charged ball is accelerated from rest to- yyz/o *lht,mz c i;3m(g)jnb a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will thj ob-ynh(g/zz *tyc limm3 ;,)e new speed of the ball be?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A surface on which all p gg9yp)*k*3))cgxlf o fz8em:aa. ioloints are at the same potential is referred to as

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A negative charge is moved f 1; ;cgikdtsg:6+r c2tmv jd)srom point A to point B along an equipotential surface.; r+d:tmsv 6dtcg jig )ks2c1;

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surf-era i k+5y6jb8gkz 8)gymst+ace must be

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy acquired by a particle carrying a chargs:da1c2+ ow- ikeyhr+e equal to that on the electron as a result of moving through a potential difference of one 2sc-+ 1dkear+i:wo hyvolt is referred to as

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electron-volt ist(e1xc ngz(*-u-o lcc a unit of

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresponds toqeyvo1 y: f.x5

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at a distance of 2.0 m from a positive point charge is 1qo n:wt5sna/ozc1qp,i3 o4:,we i/ j d00 V. What is the absolute potential 4:4ijo ps n5w ow/zd 3qneqa :o/i1,c,t.0 m away from the same point charge?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at a distance of 2.0 m from a a58ie w5w5ig ;*0w nhj;snzsb negative point charge is -100 V. What is the absolute5is *5; za0jnhng;wbww8e si5 potential 4.0 m away from the same point charge?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the exact center ofxd; r*23eatu;:v uk.jk0sval a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of the other corners is also filled w3e ;vv0a:sa.lkdx j*u r2kt;uith a charge of +Q?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the center of a square is 3.0i9ui* y85 npxr /r,hkm V when a charge of +Q is located at onr5inu9xi, ph/y*m 8kre of the square's corners. What is the absolute potential at the square's center when a second
charge of -Q is placed at one of the remaining corners?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electric dipoles always consist of wz;c0 e6 bw:u)s)dsbg6mj sn 3two charges that are

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per volt is gyq;rn 0 r)u6ta

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capacitors are identical in every reg kua0p :ol.8aspect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger on8. oka:0gl upae has capacitance

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has a capacitance of C. If the area of tu /f3lzpuqj: 0 cii77yhe plates is doubled and the distance between the plates is halved, what is the nep lj3/i7 uzcq:y07ui fw capacitance?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A battery charges a parallel-plate capacitor fully and then is 1fi5dds jfr8f ; ks,p-removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of ch1 k8- f,jfsf;d5rpsdi arge on the plates remains constant.) What happens to the potential difference between the plates as they are being separated?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric field between the plates of a given capacitor isf-w-hepneo 9, weakened, the capacitance of that capanefp -,-o e9hwcitor

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintained with const;kdi nzdq *j/im0 :br;b4jqw1ant voltage by a battery as they are pulled apart. During this process, theb/ j* nqdj14 :zwdqm0r;bki;i amount of charge on the plates must

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintained witl:4jdu:h kterwi cfsn- /uhr)w5:0o++ .zsdnh constant voltage by a battery as they are pulled apart. What happens++/u0lr w:nhewco4:ujd k5i.szs ) tfdh n:-r to the strength of the electric field during this process?

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26#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State three reasons for adding a dielectric material between 2i *t9*r1byolq)yg8tioap f6 .yqec* the plates of a capaciyocyr.g*lb21e 8 p6qqfat9t * yi)i*otor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as papem ozn4v 3gh ur+9 lg*9bbel0w3r is placed between the plates of a capacitor. What happens to the capacive b +u3*o9hg3rm4 zllg0b9n wtance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material s8+qc7mq doz -to-6wq z:pehm+uch as paper is placed between the plates of a capacitor hol +z t +qhod6:-8-pqmwm7qozecding a fixed charge. What happens to the electric field between the plates?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is connected to vhe;,vd 4w(d c3ps:rea battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased edevc (43 ,rsh;wd:vpin such a way that no charge leaks off. The energy stored in this capacitor has

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the capacitance of a cavxxt-r;+xz 5 ch pct:55xhq:x pacitor holding a constant charge causes the ene55 x; htx vrxcxz:+5:c qpth-xrgy stored in that capacitor to

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the voltage across a given capacitor c. wp l- j-worqn;0ukb*auses the energy stored in that cawjb-klqo0;run-.p * w pacitor to

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  It takes 50 J of energy to move 10 C of charge from point A to poin2 d1)osyqt y)wyw()nst B. What is the potential differyn sy2(ow)ts1ydw )q )ence between points A and B?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The net work done in movitqf o:4 5a6,ejev ):t6exof iang an electron from point A, where the potential is -50 V, to p5:o6 6:i fxjaoaqfet t,e4v)eoint B, where the potential is +50 V, is

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially 9h/ze7b qajz2 at rest, is accelerated through an electric potential difference of 500 V. Whatzhbzq/j92 ea 7 is the kinetic energy of the proton?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at rest, is accelerated through an e6cqe)go 7c*y4o s ogz;vnd* +wlectric potential difference o dscv 6z7e;gooyngcq)*w*o+4 f 500 V. What is the speed of the proton?

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Starting from rest, a pr+ouoq qa2fg(9oton falls through a potential difference of 1200 V. What speed does it acquiqf2qg o9oau(+re?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much work does 9.0 V do in movbh /fs6/l1:bxdhn.b9y -sls ling $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron is accs, eg.q8qau(kvdkaa6az 24 h0elerated through a potential difference of 500 V. What is s0a2kke(q,z86g4q h. a avudathe velocity of the electron afterward?

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-g object carries a charge of 20 mC. The object is accelerated from re6cgk+;-ne 5:v:tjohn k*hc vist through a potentig:nconv 6k- +h5 h:ktc;j*eival difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential difference?

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-V battery mainta9 i./rc tz,qxtins the electrical potential difference between two parallel metal plates separated birx /cq, tzt9.y 1.0 mm. What is the electric field between the plates?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A uniform electric field, with a magnitude of 500 V/m, is directed parallel 0;c6)k f v lo vb/mvghr3ba8i0to the +x axis. If the potential at x = 5.0 m is 2500 V, wha3gvm0v) bv0ikc8/fr a ;hblo6t is the potential at x = 2.0 m?

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C dirq3zgq ( m5/jmndm89ho xsq f)5ected toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m dirgm 5qmfojq /xh)n(5 3qz89d msectly west of that point?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton moves 0.10 m along the directi ri emp 33b;x./u(y/,jjzpe avon of an electric field of magnitude 3.0 V/m. What is the change in kinet/3p(e.iz v p;ey,r/ ubjj mxa3ic energy of the proton?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by 0.20 m, are connected to a 12-V battery. An efz49yy9 kd7cpmk;r4s lectron released from rest at a locationfc94dk mys zr;47p ky9 0.10 m from the negative plate. When the electron arrives at a distance 1.50 m from the positive plate, what is the potential difference between the initial and final points?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by 0.20 m, are connectex;9:cmwynn v:d -krr (d to a 12-V battery. An electron re vdrnxnwy(m- : r:k;9cleased from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 m from the positive plate, how much kinetic energy does the electron gain?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by 0.20 m, 0bx)lpyw;wl8tm l:w hc4i m79 are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.bmw 7mwc9h0i4) w ytxp;ll:l8050 m from the positive plate, what is the speed of the electron?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C dirdx(sind ,zdp n7egk 393tf+x: ected toward the east. If the voltage measurid:9pnsg ,k 7( dzt+xndx3e3fed relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m directly east of the point?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C directed towarxf0t.sp9 : wbum n4e+idc *-mbd the east. If the voltage measured relative to ground at a given point in the imf04dsxmw . bpcb+-:e*unt9field is 80 V, what is the voltage at a point 1.0 m directly south of that point?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a Cu2+ ion drops through a potential difference of 12 V, it wileysu )s k:93oy3w- obqmb:dq4 l acquire a kinee:d3yqs )qbowu -ybo93: m4ks tic energy (in the absence of friction) of

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential augbo )elkm2; c8kq4u. 9.eob qdt67tdt a distance of $5.0 \times 10^{-10} \; m$ from a nucleus of charge +50e?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two 3.00-mC charges are at the ends of a meter stick. Find the eleti,ul(2wq 4qavvc c(9ctrical potential for the centerqv((v a uiq w9,c2lc4t of the meter stick.

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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) anda +(;r.)8lg ; axq3dj oyewzfe a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at poiw) dx ag.+ q (fryelz;;oj8e3ant (0, 4.0 m)?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.(d n/atz w2t-t0-nC charge is at (3.0 m, 0). If the potential is taken to be zadt(2-wtt nz/ero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4.0 m)?

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at ixb8x(r1c: . sohas k4(0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at inh(kr ss4io 8x:cb1.xafinity, what is the work required to bring a 1.0-nC charge from infinity to point (0, 4.0 m)?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Four charges of equal charge +q are placed at the corners of a rectanglevco;ibd; )+;r juq -ud of sides a and b. What is th-c bd;)jvdq; ruou+i ;e potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0 cm?

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A square is 1.0 m on a side. Charges of +4.0 mC are placed in two dian f9l;w+/gkgh gonally opposite corners. In the other two corne k;9g/+flhng wrs are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the square's center?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (charge +2e, mass hs9y rw (r;fti--1yrbv *:hss $6.64 \times 10^{-27} \; kg$) moves head-on at a fixed gold nucleus (charge +79e). If the distance of closest approach is $2.0 \times 10^{-10} \; m$, what was the initial speed of the alpha particle?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is necessary to place three charges, each of 2.0 mC, a:;s;wmqb6 ; ej;re (f h3xufys.0r mdgt the corners of an equilateral triangle of sidswf;f( rymre.;qemugs3 j;h b:;xd 0 6e 2.0 cm?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What charge appears on the plates of a 2.0-mF capacitor when it ,08fkpsrrz2,pe42 x ajlvq0yis charged to 100pkerzs f2p40lq2r xj,a8,0vy V?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has plat 4u7wl (.p:hu:axqvxf es of area $0.50 \; m^{2}$ separated by a distance of 2.0 mm. What is this capacitor's capacitance?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is filled with airg( )y3 k)shxwq, and the plates are separated by 0.050 mm. If the capacitance igws)y(h)3x qk s 17.3 pF, what is the plate area?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has pl-,3jr + tyww:)viv (s at01-vcjmfbxjates of area $0.20 \; m^{2}$ separated by a distance of 1.0 mm. What is the strength of the electric field between these plates when this capacitor is connected to a 6.0-V battery?

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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has a98: 2iav hrtkdq7x/ra plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at theaa8/i7:t hqr vkd r92x higher potential, what is the electric field between the plates?

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-mF air capacitor 3jc 3l*ol w sr;x;7wztis connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained connected during th *r ltx3jc3owws7l;;ze process?

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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 60 mC is placed on a 15 mF capacitor. How much energc ,zw4dt+no;c y is stored in t +dto4w, cz;nche capacitor?

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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  20 V is placed across a 15 mF capacitor. What is the energy sto0ylzq.+ notu c;b3f0 obz/xb .5 pgme*red in the capacitoze3bc 0zlu5x /+ooy.*t m. bqpg b0f;nr?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 2.00 mC flows onto the plates of a capaclkn tqc*kdz8;x,6rp86 aru(pitor when it is connected to a 12.0-V battery. How much work was done*akk pxqtp n8z, 6( rlcrd;86u in charging this capacitor?

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a 10-mF capacitor is chys/nd + 32c,bu9xxu qstiay/+arged so that it stores $2.0 \times 10^{-3} \; J$ of energy, what is the voltage across it?

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of platbq(xs- 7fbh gy 5j(eo-es of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the capacitance?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of plates of a2wdl *70-r bj a2yhljxrea $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the charge on the plates?

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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of plates of are64xn+ le0- fwy xxbv o1/q0vsya $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the electric field between the plates?

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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructed with plate ar )r-lp9b ukf+xea of $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much charge is stored on it when it is charged to a potential difference of 12 V?

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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructed with plate area oa:zn5z awt2:: v4ta6jtifycqr9 2l -kf $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much energy is stored when it is charged to a potential difference of 12 V?

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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected to a 50-V battery and becomes fully charged. The w:p,b52 b u/iuc4dfwn battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectri4u,:/wnc5bi ud2bpw fc has a dielectric constant of 5.0, what is the capacitance of the capacitor after the slab is inserted?

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75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected toyyh2cl.xl tf, 6e +kww+swa-j)lok7( a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capaci.kw-f6e) s2ht +o lwlyax+ckwl(7,yj tor's plates after the slab is inserted?

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