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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 ce 0lvv9np+z5- zc-aw1uf7fv 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 coulom8 jo eq5x6ikdaz73/t tb is 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 imtai y2hd:4, -sgsyu-nsulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a hias- m4 g- s:dhyy2tui,gher 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 dir+qjnc5 72olk23;bwdf 6kfc3 lux(podection of 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 oppos*0 r hmt +.or5ztin4zphrd9 h4ite 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 sphere. The . l(zhkd8nfla k8/tn(y

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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 ressn42le(n5rhc*u4.cdv h ,brw+i . kn gt to a speed v by a 500 V potential difference. If the potenhnrcv2,wn4+ hrlecg 5 (4si b*uk..dntial 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 poin8nx 97ddxdzz-y1 lj8mts 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 to point B along an equipot -z26d b pfoivaq2u5g)pvy e;;gyxd:1ential surface )xv;ogp2:pia6yq 1yfe vd52;g db zu-.

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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 uuk liydmlgx l9ml myi:g6uc )1j7n-i027-5pbe

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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 that on the electr1j r oe( 2h:pcmolt,.(/tq iujon as a result of moving through a potential difference of o :(pj1iooc tuh(,rtej2/ mlq.ne 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 unir4 s;q;b9d:h fs krvekr8 +kf6t 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 corresponds8i*vyqi5 ih1, sqy-nr 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 charge 9 laglr+.-:(wew hqbn 70iy o2wq)wtfis 100 V. What is the absolute potential 4.0 m away from the s2 to: qi hb 0wef+la9.wqylw r-gn(7)wame 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 charge is k 7bes rg,z1l:-100 V. What is the absolute potential 4.0 m away from te kr,sz1blg7 :he 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 s+qa0eb 0 :n azb6dtk. 3c7godtquare 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 wgb+7 0 ac qeatd:nt3 6kbo0.zdith 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 squa:kh efwd7i6l +re is 3.0 V when a charge of +Q is located at one of the square's corners. What ilf:7+hdke w6is 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 two chargesj bca.z hvca igv0 q 3l9qn8o,f4v3(c: 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 i 2i bs v5k.)vvb-uko.fs a

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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 identi/cr n (stve,v-ps*m3 cg(:7v r,ylfxlcal in every respect except that one has twice the plate area of the other. If the smaller capacitor has capa,frr*3c,vc(s /ltl e xyp( svgm7:-vncitance 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 of the nu:xb kh*959 jnu t9v0xss 5zabgb9t( plates is doubled and the distannn vxs99tubs99u bz0axhj*:5bgkt ( 5ce between the plates is halved, 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. Th34 sh*e kpf hx ep+69 5*qvyli-gn0gile plates are immediately pulled apart. (With the battery disconnected, t-4ihqy6+vexsek9f53lh * p lg0 ngip* he 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 capacitoe 4-p-e:z66- nzzlxrwqqkws*r is weakened, the capacitan q w-r*-4zskqel zn pw-:6x6zece of that capacitor

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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 main wbk*-agfwg08b/1sco + ) etvqtained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates must*0feabcwg +s-kt)qb1v wgo8/

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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 maintasn 0 7vfs;4f0ew mz/cojtf)r3ined with constant voltage by a battery as they are pulled apart. What happens to thetj w3ssc f;4/ff0)eorm0nz v7 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 matertpwzzsv/c9 f9. *+wqqial between the plates of a capacitw9z*9t+. szp qwcqf /vor.
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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 plau :b11hd-l 9xepa+kz o4c+hhwced between the plates of a capacitor. Wlzo:1+p hh+91wu kdb ecax 4h-hat happens to 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 )hj:es51+ke v 5yxmhyd 3+ wvopaper is placed between the plates of a capacitor holding a fixed charge. What happens to the electr yo1:we5 y5 h )vsv3+ekd+mxjhic 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 av nkj+p*9(2i mvem;i to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates i;va* v n29+(kmieipj ms 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 capacit af7xekz/oe,bb vu2y ,/ a0l7+f)kolsance of a capacitor holding a constant charge causes the energy stored in that capuyxf ab/oofk 0s2/ae ,7k7+v,zl) belacitor 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 caumz/ f a0k *kzhc,it34noooe *ve 9o7t7ses the energy stored in that capacitor too0oat*e/497 e*onf,tv3k7c kzziohm

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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. Whi1 o c.r-v8ehfat is the peofv h-ir1c8.otential 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 moving an electron from point A, where the potent,:digi x6z qt1 lpz;+gial is -50 Vi g+tzg1 ; ilz,dxp6q:, to point 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 at rest, is accelerated through an electric poten 5 z n5bfhcysm1ryn9/6pmab. i)3/b sntial difference of 500 V. What iy3brb .h fm/p nmb5sy/z 6ic an)n91s5s 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 electric potential dinv )dv,ju ,xl7fference of 500 V. What isu,,l7)djvx vn 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 proton falls through a potential difference of 1200 V. c/p .h5 z,sv)sk/ bzb3-vemfb What sp5f3bzsz /v e mvc-b,k/hp)sb.eed 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 movingk5 dr+r v15 xumqxneyx:nc+80 $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electrobk c4(0( 68x slwmgnjin is accelerated through a potential difference of 500 V. What (xn w(g06 likjmsbc48is 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 of 20 mC. The object is accelerahfe d zom60ehmo3vr(42 o6s) sted from rest through a potential difference, and o2)zmv60 sr(feom3 deoh6 h 4safterward 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 difference between two parallxx99kz5kn7 vjel metal plates separated bz nj95kv79xk xy 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, wi nmy:rb nlk7 p.*n3xgoz ev;4+th 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 the potentianyp3lk:x eg4n vbr *7;+zmo.nl 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 directed s;n kr1pz5y mjprz80r4j)zca-v7fm: toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage a-fyzk8znmamj rpjcrs0z;17v r 4:) p5t 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 m along the direction of an electric field of magnitude 3.kd kn50elje2t n2(l)x0 V/m. What is the change in kinetic energy of the proton5jx)( e2ldn 02 enlkkt?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separatehp u0*5hz8ikj ,xntj34 om;eud 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 1.50 m fuh4j5ih3 o08k peuj, *z tmnx;rom 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.-q0g:8jnoza9cv a 5e.zk0ch-xo1asb An electron released from rest at a location 0.10 m from the negative plate. When the electron arn09x k0agaczc oo 5eah-8qj zvs1:- .brives 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, mtf wb,mn:u:+p7 3zreseparated 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 0.050fpumt: r+n3emw7:z,b 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 5frxrqv.cs /vndns03emo 7v3 tx;9 3q+0 N/C directed toward the 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 q vcf vrmt9n.e /3 ;xx3dqrn0so3+vs 7m 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 0i ix78 vvrr*w e cmo,3n2:wudniv/,jtoward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the volnv2ji vw /o ,iwxre i,d307cvm*:8nrutage 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 acquire x(;2fldeo9a93r i h hka kinetic energy (in the absa f( 2r3h9;ih9kxdl oeence 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 disdjrqil , 1)y:3xncs.stance 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 electrical poym 0;lzpw fibee9, ;7 x3b:z;fxq3ffctential for the cent3e;ec 7pz;fib 0w 9x:mx;ffqy3,l zfber 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/3bhqby(9(n.tbr ivz (3.0 m, 0). If the potential is taken to be zero at 9byzhq/3 nbv tb( .ir(infinity, 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 cha5csqh 7hfi /q5rge is at (3.0 m, 0). If the potentifc5q5q h /s7hial is taken to be zero 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 (0, 0) and a -2.0-nC charge is at (3.0 m, 0 f,n*kq 9o6hnf8mex c8). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to point (0, 4.f,fqo x6hn c m8ke*89n0 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 rectsy9p0d6yop*1(y-aiy z .oqwvangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, awidy 6qo1py-p y0. *y9v sz(oand 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 arer1bqp, kdq *)z placed in two diagonally opposite corners. In the other two cornerpqkdbz*),r q 1s 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, mas/t3cj *jumsy c+oj+1b hk-) wxs $6.64 \times 10^{-27} \; kg$) 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, ) 3egp)ach4obftx7, 8gyp r,u at the corners of an equilatec ahx8g)p fy3peo,)u gbr4t7,ral 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 capacitor when it is char.2dq+r m+kjkyy.yvr ,ged to 100 V?myq+2d.r,k vjryy . k+

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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 plates of area 2gqa h:;k.e. hlu0grj$0.50 \; m^{2}$ 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 filledg (up-v k7y:nmzlhj enjs4 ;w6gi,-n6 with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate arl:nsiw( g7nu,6v p4-;jj mn6hgyek-z ea?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capach -c6 km k.w qp:)94imat-digkitor has plates 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 plarc6gw: 9z*t:z njlmyr4b0x4jte separation of 5.0 cm. If the potential difference r04g 4:cnrjlt wbzz9x*: jy m6between the plates is 2000 V, with the top plate at 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 is co wi+o27gwqtwbb dn4;x s x.3q-nnected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectricx 4w.;2q3otx n q 7-wbibdws+g constant = 4.5). 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 1-lj vj2rj x+x35 mF capacitor. How much energy is stored in thejr+j-jx3x v2l 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 cape:xa, nh g.req/ g7aoj 1/zv,3ok+duo acitor. What is the energy stored in the capacitor?,udjkz1 eooo//3 h aqnxvg+gra7.e:,

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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 is connecry;m1xl ko6,x2 s;gj*a )lh mzted to a 12.0-V battery. How much work was done in yl k;x)m* r smzg6a12;xlh, jocharging 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 charged so that it so4t.eosko7vz9b d o 13 v5xa*ujmi)aa6 )ws1stores $2.0 \times 10^{-3} \; J$ 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 consistsvyl hw436d2ok 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 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 ar*y*1nk3 mwqsgea $1.5 \times 10^{-4} \; m^{2}$ 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 zu dc t:xt+p9+-jkvii.wpi z37t4om 3 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 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 capacitd5iy8. (g 8vuzm4 b gsrdw;q6ror is constructed 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 withm,bj)l/k;7g7ka vt0pg f* rpu 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 connected to a 50-V battehb idv32;cxj )ry 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 hahvdj xc2 i3b);s 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-Vom3 595li pfp*4ovex x battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the fpxp5im4o3vex o5l *9space 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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