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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 not a 8cxmdp8( . hibvector?

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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 is a+pg3x1 synu)i

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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 insulated from their surroundings. Object A 8:u f huy;ndyb()frxw es(6-fhas a net charge of excess electrons. (seu:8 nw)rxby;- dff6(huyf Object B is grounded. Which 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 t6y iwzma,ihlq 37+docs:9 zi1he electric 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 t 44bc;z3beaap he electric 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 placed on a holl5o d0 vt0sg,wuow 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 a speed v by ds/;-6o9 5dzn)h,l x b fk2ivfcbj9gxa 500 V potential difference. If the potential difference is changed to 2000 V, what wi d9x,/ov j 9hbslx6i-)5n2f f;d bzkcgll the 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 points are at the same potential is referred by a,lp6o )gl;o .)hzhjb-.a4vln3ow 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 mcb 9mn 8 al0:duxouj/:oved from point A to point B along an equipotential surfac0nj8dlmou u :bx/a9 :ce.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential sur*fyc+ mip2;s) )hr prbface 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 charge equal to th)vr :0gvff3lu 7mfgk zit9j e47a4is8 at on the electron as a result of moving through a potential difference o:agrmgf j)t f794lv4vf8z7 ui 0i3s kef one volt 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 is a unit fni(928wnuq ff lf44sof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspo:uo;0 .; r bmabt.umtmnds to

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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 rsc/:w5m7cpm (5 hen/ -zupifcharge is 100 V. Whsnp: emz /hu57/wm cirf- (p5cat is the absolute potential 4.0 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 ng xtngsx 5abb)+7a-+ eegative point charge is -100 V. What is the absolute potential 4.0 m away e -)+7ag ab+gx5tnsbx 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 of a square is 3.0 p 5x3 e o(lc8 xf;)ki-q,km,:anlkgdr V when a charge of +Q is located at one of t-;5,gxi3pf 8ak :l l,x k rdm)qckeno(he square's corners. What is the absolute potential at the square's center when each of the other corners is also filled with 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 3p y(cb1/n4bfzd g4y58u:ipz swd69aw.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square'szd5i nb s/9 6cw44w gady:8zbpfuyp1 ( 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 alwfk,ukg7+5pp7 f c7x3 mc ksp+aays consist of two 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 bz8qk/qx ,sf7gn 0+73v6vnfom3 cl hxa

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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 respect except tz cfb.4 ,:hyathat one has twice the plate area of the other.b hat,4zc.:yf If the smaller capacitor has capacitance C, the larger one 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 o ztom 206evr(vf the plates is doubled and the distance between the plates is m6zvve(0 2r othalved, what is the new 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 removed. eff 7-;s h0ffv2yn80d)* ti4rm; 5vvtmpa mjxThe plates are immediately pulled a25h v ;0v*-)t mn 8m0v7etd;4f xyffajmpifrspart. (With the battery disconnected, the amount of charge 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 is weakenedj d9y+lt,)t hxf5by ts0clz8(8mwm c*, the capacitance of that capay*,+b)tclz8( wy0 ftmhc59t m sx8jdlcitor

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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-plmzn3ob +)4 g70:epepp0cc kw hate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates mo ) p3c+:e0pb7kh ez 4g0pcmnwust

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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 with constant voltagesb, quj( m+ora+d* e) x6.hygbtwkv 5( by a battery as they are pulled apart. What happens to the strength of the5jxau+qo(y k* )r+t 6wsbhedm ( ,bgv. 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 the plates of v 3,v za b3(d3uf. +h8yxovkp,9equq q0um)rua capacitor.x3kf,(q)9m+o0u 3vb ,vh3pryu uvq.ezauq 8 d
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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 paper is placed between the plates of a( la e3 fs4lf-mjdgm 67zenw55 capacitor. What happens to the capacitancesef zm fa-w5 jln5ged47l36(m?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material sucltt eboa13 ,5.ypxw,m es jnmwdr2.,/h as paper is placed between the plates of a capacitor holding a fix djmtaet.,3o, 5, nmyb .wwplr/sex1 2ed 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 a battery and b-+suc m)zh7ul1k(fc4x a /l cfecomes fully charged. The capacitor is then disconnected, and the separation bet cu7slkz4l)chm-1f/(xa +f uc ween the plates is increased in 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 capacitor holding a constant charge causesl* s)fuc y2h6,pevr/t the energy stored ih2typc) fe6v*,usr/ ln 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 cauk-s e l.c71di lyt04ro.vx-kl ses the energy stored in that capaciko t yv-70sl.cxi.1edlk4- lr tor 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 point B.my*:t)a sfs p.xh:h2ms2 f-xt What is the potential differ.pa*:yfm 2hshs)2xf x:mts- tence 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 moving anbdmgj,cbojh:2,x6 3 8wiq7 d f electron from point A, where the potential is -50 V, to point B, where the potentiald gm62ih8o,cjbj7b ,d qf 3w:x 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 at rest, is accelerated through az6ped 78zvbyn )zkh+4 h ;vzc8n electric potential difference of 500 V. What is the kinetic energy of the p;8h4p8z)7zyd6b zvn+vh kc ez roton?

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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 electric potentbm g*ww(0s;o9 dlda 1pial difference of 500 wso1 0m p;*(dwl ga9dbV. 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 kg)plu xtk4 byi/9/.v proton falls through a potential difference of 1200 V. What speed does it acqu igu.tx/pv kk )9ylb4/ire?

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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 r1u dz9c ,qea sr7yme,.-rbj2moving $8.5 \times 10^{18} \; electrons$?

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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 accelerated through a potential differenc xybyn35j5*fa e of 500 V. Whaafxn yj* 53by5t is the 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 ofw ddg(v20glqz;o .x. h 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential differencewd ld2h0zx .g(o g.;vq?

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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 maintains the electricalwb8-jig4x9hz mxd qmm*6-w 3a potential difference between two parallel metal plates separatedm9wgxqm b4x zh8*63m-a -ijdw by 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 fielkpgx: dmm,8( bhkn *g46vs3ef d, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is t3mps 6h,:*g k(xf4gkn b8evdmhe 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 electriceafd4m dy:v2c9)kke 6 field of 50 N/C directed 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 c:4dk2f e v6me 9kayd)directly 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 direction of an electric field of magnitvi9nc4 3fxvc+nxz+q8 ude 3.0 V/m. What is the z cvq+vnix9xf3 +n4 8cchange in kinetic 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 uuqjh*55 1vee v wp1p(;fv,a pelectron released from rest at a location 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 u1uvwe*f5e1, (pv; avjpp 5qhpoints?

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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, a p f3(eq;n8dpwre 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 0.050 m from the positivwpdp e(q;f8 n3e 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, separ*yi;.tv6o ti:zxi l( zated by 0.20 m, 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 0.050 m from the positive plate, what is the speed of the elect;z(* zxytvl:6iii. toron?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electi*dc9,ncr 3jjd, 3hvv ric field of 50 N/C directed toward the east. If the voltage measured rel9dricnv3 3c,*j,h djvative 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 toward the easth,6--akld:idjoir 2c. If the voltage measured relat-or:hd ai2kd6il,jc- ive to ground at a given point in the field 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 will acqui6l6 6t t+bznobre a kinetic energy (in the absence6+bl6b zttn6 o 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 at a dist91aok+8z0 x.ja gvye kance 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 r7 nq755b qgc(l ux;;vh(jum ia meter stick. Find the electrical potenti;rq j(5m5g (7uu;cqxnblihv7 al for the center 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) and a -2.0-nC charge is at (3.0 t u7bmzf/68hnpr2;qkl q4 0 pxm, 0). If the potential is taken to be zero at infinityk2q6fxmn0 l/8t 7hp4b;upzqr, what is the electric potential at point (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 -2.0-nC charge is a g qv//wid)rx9uo1; cbfeb5k3t (3.0 m, 0). If the potential is taken to be zero at infinity, what is thegr; 1 w ov)buf9k3db e/xi5c/q 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 (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If trlqgt-zua v z)8 4268pium.k vhe potential is taken to be zero at infinity, what is the work requ.gv 4zvau tpz uq mr-l)86k8i2ired 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 corn da- rz0bfpt5,6mg/zcers of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and bfpr m6az,t/z -cbdg05 = 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 twozk -spa/pg, ,0aam d 2.k(spgu diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute po2ag,/p-p( mskk za 0 .,sapugdtential 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 +kg14;,bm r+ bo pca.sx2e, mass $6.64 \times 10^{-27} \; kg$) 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 pet /hi3l)efgao) )0jcv4 tn4x;-vami lace three charges, each of 2.0 mC, at the cornch ; il)jt 4ex4 3-vt )ovna/i)mag0feers of an equilateral triangle of side 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 capaci zd* quv+uzwiw201x4jrpuy4l)i)e s2ky l* k7 tor when it is charged to 100 iyrwuq4j +p* s x2z4wedl) )2yk0 uzl7vuk*i1 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 plap;l p hdyu8xl,+)9s gktes 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 air, and the pwcvtkc6a r fua(zxq3:3763 xtlates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate af(au3w rv63 caz:q3t67 tckxxrea?

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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 plates 8y lov//uwx(igd 8 ni.in7sa-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 a plate separation of 5.0 cm. x*,sc98 ybyrz4 gc /ru If the potential difference between the plates is 2000 V, with the top plate at4x, ygrrcc*8 s9/by zu the 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 isst8kkg 5x;;zccy+j x : connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4cj;: c5xx+ksz;k g8yt.5). How much additional charge flows from the battery, which remained connected during the 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 *y2b 62g sdgrrixn (u,a 15 mF capacitor. How much energy is stored in the (6*y bs2 ngrx2u,drigcapacitor?

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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 y a9)mzoha84 yis the energy stored in the capaci)ay hz4 9oya8mtor?

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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 capapq-:pdcj6a8xzam 8x3k89c u v*w zvi7 citor when it is connected to a 12.0-8wvi *jv7z- p6q3u xd m88:x ccz9akapV battery. How much work was done 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 charsdx8ch1kus v.u.: thd+5h0eat+eq .n ged 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 pltl*q4)ycg9 z3 lxm g1vk4r1ra ates 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 o: nq8/hd hoq+gf plates 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 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 p)25w nehmthulo stb4o1 h )*3llates 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 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 constru ypbbt/rba 7f(y1( )ptcted with plate area 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 areq7g) a (ydj0fq;tr; uaa of $0.40 \; m^{2}$ 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 battahu5fo(.df.;d)2 z har kvqw-ery and becomes fully charged. The kz2waf. r av) d.d;oh-uqh(5f 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 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 to a 50-V battery and becomes fully charged. Th)y;( g86s hd2uib-f rvqyqbyrd 3nv*,e battery is remove6d),r3in( db8yq;q*ruv yfy2b hgvs -d 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 capacitor's plates after the slab is inserted?

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