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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: 游客未登录  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 followin7u*3 rkecf21pbmbi.w g is not 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 is rref.hoglt(/4taq98 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 rhlm/v(+l0xj+vvv )fare insulated from their surroundings. Object A has a net chargej +v/hvr)v+vf0 (lmlx of excess electrons. 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 o:t6dg5fknb(;c6b boi f the 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 oppositsfe: y(z ofh*m5s 9tc 384dofte to the 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 hollow conducting s0wlnl, icp0 f+phere. 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 a 5:sq. +dfxdpyv9s1s7 x00 V potential d9+s .dxspyqx v1f7 :dsifference. If the potential difference is changed to 2000 V, what will 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 p(e;c q-7:wshns:x (am dx5.y vhu 0jkpoints 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 from point A yz uvmo u) q 2zbo:9(5qi mzq:-xjb09dto point B along an equipotential surface.9)v( m z:i5jbbo2qoyq:mz uux-qz90d

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must u80pc 8)mfk vibe

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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 carryin i:z.3wq5rkis +rvfqhk8.v.ig a charge equal to that on the electron as a rev. s.z rq k.fikq+5:vi3h8iwrsult of moving through a potential difference of 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 un)ywltpey hhu:49,2/-etw r gq-mlge:it 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 correspru y e5fa6pyxcb* p0 u j4kxm3u+)56ynonds 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 posz+e4h ,- gksrint charge is 100 V. What is the absolute potential 4.0 m a,essg 4 rkzh-+way 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 negative point y6*:a jsau66zo frd a5charge is -100 V. What is the absolute potentia6jryad a o6*6 usz:a5fl 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 of a square iuj7i8or ;n)ht0kzz s) s 3.0 V when a charge of +7ktzs0n8 z o)ri;)huj 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 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 3.0ft6 od )hy tcl+:tb7)z u2/mti V when a charge of +Q is located at o+tfzdh) l 2bt)/o yt6iutcm7: ne 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 alw;wc(5v /bq gp/ ;.ood y gr/md8.y +1gkwflhznays 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 spt* xlx6qgs j:t.5c5iri+z 6i 8o(w sa

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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 idenago :) u3sg, lvj.qqe lwx(t0j z9te9.tical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitaqu:)3 9 exwlvqz 09gj.ot.eat(j,sl gnce

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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 capaci:tmq+lo;crf1d.3zmdc ze .3h tance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capac:+qrm ;1c.lzt dzedh.cm o3f3 itance?

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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 s cp/(;k ve06mu6 ki/w +f,rjjeme)xcparallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) xc( e)+kuvjkw smpmrfj/ e6e;ic/0 ,6What 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 toq(x9ei) fj:sofa; ud6 ;h3cjhe plates of a given capacitor is weakened, the capacitance of that cahd( oeo)jf6;9jsca: q3f ui x;pacitor

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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 capva /,rl.j/jmb v0/epjacitor are maintained with constant voltage by a battery as they are pulled apart. Durin/lj/j vp vrja/b .,me0g this process, the 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 with constant voltage bp:.n w cs zlimy9+g0j4y a battery as they are pulled apart. What happens to the9l0c .ziwmsyn+pg :4 j 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 the 2pqxv/ jjlrml(s5-,e plates of a capacilv5lpx mse j,j- /r(2qtor.
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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 cap2)vs.-/ e 3)swjxphu s 6ielleacitor. What happens el3ul.e2wij )h/ep)s 6xv- s sto the capacitance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as paper is placed betw0i 7gw :x gdb0wln.b(q 4sox3teen the plates of a capacitor holding a fixed charge. What happens to the electric field betweex7bg3qwni d. t0bl x(w4 o0g:sn 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 bata(ho 2ul75 b jwp,ws3etery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increasedws a,o eu l3pj2b5hw(7 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 r 5.je9 bw6zvrg 0ni4nholding a constant charge causes the energy9n znjri.b0grv 564ew 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 causes the energy stored in that c 4xpb:2(b 0agb3f9u a7hhsfwrapacitorb0f:(a h7 9g supwr24axf3bbh 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. Wh0tn2s(/ n2omjn : pwkzz s:j4yat is the pote(sn :j02tznznkw 4/ o ypms2:jntial difference 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 movin1kfy zjd b+m7p/f:r b08ofd 7fg an electron from point A, where the potential is -50 V, to point B, where the potentialbrf/bzdfp0d +8 1j 7okf7:fy m 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 an electric pote feh734h-ig4era f4rs64y pb fxmv zm2 543dsuntial difference of 500 V. What is the kinetic energy of the protor3a36f2ieg4 fm4 zv4 ds4mhxur4bh e- 5ys f7pn?

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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 jkm p3nq; 7d 8c21hbduelectric potential difference of 500 V. What is the speed of theubcj;p21 8dn7m kq3 dh 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 proton falls thr jp- 2m5j0ji,3r bj62chmhl jtough a potential difference of 1200 V. Whb mtp h06jj,l235mj2 ihrc-jjat speed does it acquire?

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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 mxc ;mf-2i q)iamonbu37o5,k bqbcv22oving $8.5 \times 10^{18} \; electrons$?

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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 differ 2kr/:q fnsgo2 17abqbence of 500 V. What is the velocity of the elero 2: bb 1q7ankqg2f/sctron 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 :j ) x,dmgn7vefrom rest through a potential differe,):x7 jgn emdvnce, 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 maintains the electrical potential di0ieghyr 6+jdzr 7p7k4fference between two parallel metal plates separated by 1.0 mm. What is the electric field between the plyrh7+ pgj0r d6k7iz4eates?

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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/hipzgf y 41;9cm, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 m?gf;c 1i4z9p yh

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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 di0pf( noiti2qh, 0/ b9f nfmds(rected toward the east. If the volta/2tifhnno(sidq ,bf0 09pmf( ge measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m 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 6ds(/bka:im6 bjk 3rh fke+*em along the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the pbk *jb(:6 kk+r3 eha/6mie fsdroton?

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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 batter1gra+w3lar6t/ 4sf ktxh xn9)y. An electron released from rest at1r+k4)g taf/sah xl9 rwt63xn 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 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 connected to a 12-V battery. An fx gj-*me89voit73z uelectron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 m from t* gte f37mx8u9iov z-jhe 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, separ5ss i*bch p2sx fb6qb;n-8j8pated 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 pl;i- njp 5p b6 8xq*8fssb2hcbsate, 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 directed towu ;mqn51uyu5p8m uh4 gp :-rnpard the east. If the voltage measured relative to ground at p4p8mqgu;r pun uy1h5u m :n5-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 thqm6irf9e4r ud fcou 2w.r--n va/dk8 ;e east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m directly.n 6/ fear--dcu4o wvf;q29r u8dirk m 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 acqmme i*rc sd6n9 e4g(x/uire a kinetic enm/c6i4d mrn*9e x(gesergy (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 at a9ni9-b) yxfxq 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 argf05ge l4yc,n +* fgwszfdby 917/c pye at the ends of a meter stick. Find the electrical potentialg c14 y/ ey9wn7fg,5+fzd*gyfp0 l bsc 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 zl)gglat j738ytpv4,-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infin7vl)zl t,gay j4g3pt8ity, 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):ipv ) kz0h0gz.lqwu yn5 id(, and 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 potenti hiukziv 5pyql0gd,(n z.0) :wal 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 ah(hgw* t69snjg ng4 r:x/j 5fm, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.* ngs:9n/ha x4r5ghg (jfj w6t0-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 rabg6 rioc 5emx* bl9bfnd /3w/-l*1 ncorners of a rectangle of sides a and b. What is the potenti*m gb-l9io/3r alnn1b/bf 6cedw x5r *al 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 diagonalk0l7maf4 u- wgmll1(mly opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. m 04mflmuwkl-lga 7 1(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 +2eitpqld1b: 2nj c;qi3ewt1 0p/, 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 place three charges, each of 2.0 mC, at tutjm3fe iz,5 8 f(lnmk; 8dg4she corners of an 4l3k em8,d( zunm8s;ifg5ft j 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 capasx (zp 5q52joacitor when it is charged to 100 o5z2 jp(q5 asxV?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate cap irq++b+a8ljg 1dn3c yacitor has plates 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 withhw(*vv-c- 3w (ofnh jd air, and the plates are separated by 0.050 mm. If the cap*oj-v-dv hfw h n3((cwacitance is 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 plates of lwg9rhn:obuhn*g7:mzw -c 3 4area $0.20 \; m^{2}$ 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 sepa2qqkk-i;jz- rc- h 8f7qjp3 jtration of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field b j7pic2zf thqk- ;8 3qrjj--kqetween 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 is connected *4y/tc b7:lifx8l:p7jlu/1 xpt qqn s across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4jstt4yp/p 1l:nlbf:lx/xc 7*u78 q iq.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 a 15 mF 4rsa vb scj:7sfivt )z7b5 )0lcapacitor. How much energy is stored in theral7)t fb57ji: vsvb4)0 scsz 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 stored in 7:nitt z0l)8ijor2 v2qb htz8 the capacitjr8hqtv)i2t7bz tinzo 02l: 8or?

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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 capacitor when it 6 jniplp4l;cj c ys7tl lvg;289 j;/nwis connected to a 12.0-V battery. How much work was done in nlj6lpcltig4s 8 ;2 ;9cvp7 wjj/ yl;ncharging 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 chary bhz /x1 xw(f.z)xu4sged 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 plates of arevtl8suhl)77v n5y5k 8w mtya 6a $1.5 \times 10^{-4} \; m^{2}$ 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 capa ah 2v xs+)wh7zotntqiqmq1p 1: *9bj6citor consists of 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 consis/)zms*4 (uumt/-t lom bsf:c jts of 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 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 wit :*jd,2ug 1/d zfkithl 3 1doosa4uma;h 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 construj wbbfs -rtt+1i4*se+6wm.fr cted with plate area 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 connecwp viuyuob 2 wrp)*e/avf((tlu(0 8(tted to 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 i*(o0 8atu( ev wuypw( /ubr) tvfpil(2s 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 cdfbf 69c:pl up0 i,o,konnected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between thfpki9,0df :b ,lu 6pcoe 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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