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习题练习：Physics Unit17: Electric Potential
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 作者: physics  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 following is no6t27 kbb sv-rtix +pev:x9: uut 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 coulomirp 6bng fm.:2b 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 obje q.e sqhx)w-(scts are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potential(hqs)qx- es w.?

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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 directionig 5dww0kl1/znrz +b1 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 opposite to ihsv 9snl) u1e6: 9 vbcc9)wpxthe 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 spherb0oo8 w2 trhf6e1h7zp cpz ys)uez */6e. 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 acceleran)qti/); ly1qb6e p;:w djkm-jl (pw nted from rest to a speed v by a 500 V potential difference. If the potential difference is chanqn)w-e npi(qk yl);bp /mjl;d1w 6:tjged 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 points are at the same potential isz i .5lxuz2 .q6pdl0vsiy h(:r 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 equipotential surfactggdjj 6wlpk,s lyp 6f2/ 1 ;rusf1q;+uskt p; /r;fgl1,w16q+y j62psf dglje.

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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 bqj 2sn yd:- ev:h0.cyde

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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 elec3i4ogl8 a of)qtron as a result of moving through )oi3 8aqgol4 fa 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 uni- sr)z p1mvlq;t 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 corrvz;.r /aydpp+kcl/6m esponds 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 distaq))y+jlr-wgl.fczi l;sn 7 q;nce of 2.0 m from a positive point charge is 100 V. What is ) gjs+7fcl;rqnqilz )w.y;- lthe 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 negative point charge is *bm0,ag2b-im9(hzi jvjyont ,l otjafw8. 8/ -100 V. What is the absolute potential 4.0 m away from t0a /gvhi- baj8tj 8t,*.mbm l(y9zjfo iw,on2 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 squn+r+k(lg tgg -are is 3.0 V when a charge of +Q is located at one of the-rl( tg +kng+g 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 3.0 V when a cha.m m ,l.1kfr 6bnob/ecfkr*bi cv h,55rge of +Q is located at one of the 5,fm*c 6b .i /b5 r1vkl,o mcrhkfen.bsquare'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 tz d; uzb15qhsf)4 yl/cwo 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 voltx(y7/ d9/8:ojrhfsmj rs..oa dk1 ced is 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 identical in every respect excepkl*h9 upx rtdru ;46l6t that one has twice the platelp4* 6l9r6xrdu hkut; area of the other. 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 f8m ,epp3(nrl8 odnm2rahiy4:pk.:ghas a capacitance of C. If the area of the plates is doubled and the distance between the plates is halvep f3 8pnmo r(8k:n:yde,hm.2r4i gplad, 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 6md : 6wuz3cgxremoved. The plates are immediately pulled apart. (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 separate:xgwd6m3u6z c d?

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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 betw bl9hj4jv60f1r l;j+w qz8zpdeen the plates of a given capacitor is weakened, the ca1z j4bf 9hjvq0jlzr68 l; +wpdpacitance 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-platep;gf**g5-tf h *zcd sa capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on *fgd5fa-;ptz * *hcsgthe 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 maint bqjgm- 6f8tb6ained with constant voltage by a battery as they are pulled apart. What happens to the strength of the eb q6jb 6tf8mg-lectric 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 platj8zq+h)of94s k2 5gtb)z hsd5 j3 fgales of a capaza5 df + qg9t8o) k2ghhlj5)43zbssjfcitor.
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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 capacitorepjgqr:)w7h// y -bpy. What happens to the capacitance?brye: )qp -j/py /gw7h

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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 between the plates ofy*a v7ir:t(fg a capacitor holding a fixed charge. What h va :(ty*f7rigappens 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 b vlxwgk)49q1.m v2k 7kxfn2yt5t 3bqj attery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in t1 5wmt )nl4yqkt3xkkvb22 .g9v j fqx7his 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 cause8ri*i -zpiu,3v fv50wvnd 9lk s the energy stored in thaun-i8 pii59z lkrvvf*3wv d,0 t 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 cause2if.q:pvy 3mus the energy stored in that capacitor mvy:.2uqi3 pf 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. What i02zsrax8tq y9 0 kj ohxd+8su+s the potential diffx9j8rtsh d quza+o k080sy2 x+erence 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 *dpi s;( ,2/z b6xg0blwwwvw -mfo7lc;ik q1 san electron from point A, where the potential is -50 V, to point Bvw,7p1 0(xcsmi fl 6gb wbqk l2dwz/*-;;i swo, 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 resm5w(,. oxgj) 6ygortx3,ety4yspg0 m t, is accelerated through an electric potential difference of 500 V. What is the kinemmo30gytx y.w,yr() px eo4g6 ,s tjg5tic 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 ekk8l94f;sbzmmd d12olectric potential difference of 5bo1 z;82dkmdl94mfks00 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 proton falls thr3x xdo l*;gh /9d yu+sv3ch7kqough a potential difference of 1200 V. What speed does it a73o h ql9/3cukdd +s ygxv*h;xcquire?

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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 m ,p aoz6l8z9awf goy*;oving $8.5 \times 10^{18} \; electrons$?

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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 p(wq5vb3ibs 0fg )7z stotential difference of 500 V. What is the velocit0 w)tgfbsi7q svb3z5( y 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.5zv4nw e ov0k, The object is accelerated from rest through a potential difference, and afterwa v zwke5v,o4n0rd 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 electricnimz+ b8 4 km.mo+):it1roqvkb8b v- eal potential difference between two parallel metalem kz1 q :)b8-8vrvn+tomk+ob.i b4mi plates separated 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 field, with a magnitude of 500 V/m, is directed parallel to thd(8,0cp.ru vabo ;1/gfzbz/;wk fodhe +x axis. If the potential at x = 5.0 m ./zbh 8zcb( kfvp do,r;o1wfd0/; ugais 2500 V, what 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 directed toward the easfek9cnf1q/pqhg 8 5*it. If the voltage measured relative to ground at a given point is 80 V, what is the voltage ag1f hnq/ i 5c89*pfkeqt 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 nf2tyv ua2rk4tw*yn+3txn /8direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the proton+a 2ntvyu ttn2rf8x/n4k*y3 w?

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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 +l(;lhhe .i,p/cug8no;i ytq 2 zrm-chz.us) electron 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 an.2 czcn+u-)z t,ur8p s/;.g hlimley(;hq ihod 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 mg,bk eab.f0.n , are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate.gfeb,n b.ak.0 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 :wpw sw 3ji:8yb)01 /e ho0kej0fgfyh0.20 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 /0 ibep81yyhj0::wewfwk os g3fhj 0 )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 f2 l6:2xmoo kfro-w r-iield of 50 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 thexm:o ir2 - f2ow-olkr6 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 eleocwth1a)r+6h *-cx kgctric field of 50 N/C directed toward the east. If the voltage measur-)gk +wc6hh*1 acrxtoed relative 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 acquybd r*d/1wod40 e:mw2m 19gatfx5hh uire a kinetic energy (in the absence of fry*d0 /ewodxbfwdh1ar g54tm:h 2u m1 9iction) 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 distaatg1 0t;ehw mmix a+ y43x+y9mnce 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 1m3 kfngodr;:the electrical potential for thekrd:f3 1 ;omng 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 atjc(zn5a 9ieo . (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is takj( nci5oea z9.en to be zero at 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 charge is at (3.0 m, 0). Ifs2yf12+ 9rq; w 3zbgmt: mmwvm the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4.0 yb vw 2:q 9mf1gz 3wm;tr2m+smm)?

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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 (3swv8 l(cnacj:0 6ii2 c.0 m, 0). If the potential is taken to be zero at infinity, wha6ij8c cl v(:0csaniw2t 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 cornemrp;s; 2 0q20 jcjkqmqrs of a rectangle of sides a and b. What is th mck;0p mq;20r jjqs2qe 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 k a.ym6w*hgk4+noxo. diagonally opposite coko4 . *x6k yoaw.n+gmhrners. In the other two corners 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, lgslb43ygbw b88 tqidmy*4wg*xu ex 708:nn5 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 ofpf:mfn/z /llw 6)*ka t 2.0 mC, at the corners of an equilateral triangle offa *l:/mfz /lk6wtp n) 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 plates5x8*olnw .l 3jb e*wme of a 2.0-mF capacitor when it is charged to 100.w8o*53be lemljw n *x 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 plate7bwanyx/y29o l- 7 qwhs 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 plates are se: hawn5yuv91xc68 uas3 fr dw-parated by 0.050 mm. If the capacitance is 1hrwxf5a y v-d38u9wn s16:c au7.3 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 capaciu1stmty 2 9iq //)1lril mqb2ftor 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 plate separatioa 4kkf p* x*lq6cp(w3on of 5.0 cm. If the potential difference between the plates is 2000 Vx q* ( a3ol*4kwkp6pfc, 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 u m-k-xg7yu 0vconnected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is i- mk7yu-0gv uxmmersed in transformer oil (dielectric 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 15 mF capacitor. Howy2aiirfw/m 2k 6d v/d2 much energy is stored in the i6fm2 awy/ rkv2d i/d2capacitor?

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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. y .0oogdlh;f j.l +b ykc(2,pr What is the energy stored in the capacito,rc. (0 2oljg+pdyhf; yko.bl r?

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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 absz1 rj qzoz2-:8t3na capacitor when it is connected to a 12.0-V battery. How much work was done in charging thi2zot- bzsanj:318z rqs 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 th 2mt0vxwbz( klg/vk y:: 1zu9uat 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 plate/dac-nq: j r) + +tq/enf0uilgs 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 capacitoo6 p /k.sb0s 0v4mqtxmr 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 consists of plates /o*r s37fehz5ft v;byof 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 constructllvz -d7n1b89b ze1e ced 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 constrfqm*m4o5* )l j-diei4ls) ec uucted 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 connected to a /w 7vfg)x,6l+ken-wz aewm4 z50-V battery and becomes fully charged. The battery is remoek w flz),agz-nw 7e+4vw/xm6ved 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 connevwz) pexsk1rr 2a ,(c5waft 9(q7r i+xcted to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills theakitfps7r2wzx)(( vq 5r,+rceawx1 9 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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