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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 r)q4k6)jmb:m 1ykvb q 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 is87vrkhcj, p8ie)dmm f d4:8pw 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 are9 q4uv8r i66ed:av ohluta/ s0 insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potente6:4t/ 9i uvra0sdhv qlao68 uial?

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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/xn x7m ,v.aiumq,6e l 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/pbpbr*gjs6* fhc 56c in a direction opposite 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 q(a u qimj6w8cs.:mu 7a 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 a speed v n24m uhffk .*kby a 500 V potential differencekk4hff m*.n2u . 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 points are at the s2l 9 a5 qtktzl7vig+ysr)**jeame 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 equipotentia /6qm3( zflxr v;)ulrol surfacv;mz 6x/rru3fq) (llo e.

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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 b*4ekz5( 0nm 3w+w 8vlfxak.seni(p tke

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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 charg+yv ;9kona* s5jmdkd(e equal to that on the electron as a result of moving th*d;nvs9a5k(jkd +y m orough 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 uni2 i: s 4ocs);q9p ofzei5fozn0t 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 to e h wh5o22s2yewo/v10u(atd-nrsw mu6su2 x(

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential akc5,vx 5*ti oe/r gj:h ,s5pv;3kc ytkt a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same3erttvj,gk s c5koy h*c5p5,:i/;x kv 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 negatijgd;ty)zu(b0 /u5ivive point charge is -100 V. What is the absolute potential 4.0 m away from u5yi /ibz0)dut jg v;(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 V ie;2ldet9 kl n3md+d1j3nig 2when 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 othei dk2 de3m9dln2iletg;+ n13j r 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 cente1c 5t: wpxthj3ls mu.1r of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is ths.1h 3xw c m:t1lpujt5e 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 twbmsb6ey c4l c)k. k(x2.dzfz 7o 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 aebe v4r0n.f) c5b6krfavj,.g

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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 excedchssydma3 p* -/(p7spt that one has twice the plate area of the other. If the smaller capacitor hd3p7yhcs/pa- ( s m*sdas 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 of thi9x-mg6 ezp7/- ,cc 9yq gr:,ltdzcjxe plates is doubledc,tdm9c:z 9qc g-6/- grxxe7yz p ,lij and the distance 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 slb i f +nuitjt2./0/wremoved. 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 betwt0fsi+.nt 2 bw/liu /jeen 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;hh8f v y9e) yw,d/n0 buv dt5jg/ed*y capacitor is weakened, the capan yuyde8d bd9 v5e, v*)wth0y/; gfj/hcitance 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 capf6i 3s/c6d( erxb*og4jml w8qacitor are maintained with constant voltage by a battery as they a*o8b64g6j lr(icw/3 smd efxqre pulled apart. During 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 areplvb* cv4 pe)2 maintained with constant voltage by a battery p4vc b*2vp)e las they are pulled apart. What happens 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 betwkzc1 wghp vm95o8(ym 5c5ygo) een the plates of a capacitorckg 5cv8y5(9o15o) gmpmzy hw.
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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 tkv(bs wi2).tw 1gft8paper is placed between the plates of a capacitor. What ht 2s 8gvt)f1b(wwk.i tappens 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 materiallme* i q(j7.u.hj6 kqp such as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between th6klh7qu qije. j(*m. pe 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 conne 7i ,8fr22xf)oz8yapokesfl;5pq 7g jcted to a battery 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 sa5 i7poy ,j fzq88rxsf; ofp22l)ek g7tored 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 char v-woj4 10akou w3b(djge causes the energy stor4awojv3 1k0( wojudb-ed 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 capdutb ,fz9 u+ls3, e8xsacitor causes the energy stored in that capacit,z sfxtd, +u3us8lb9eor 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 mcpz6d )ss r06from point A to point B. What is the potential difference between pointmcsz)6pr0 d s6s 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, whergf,e9uobkza3cn7q g*mof r2l 2g9 u+:e the potential is -50 V, to po+k, 9:rn3g2o bem l2ffc*agqz79 gou uint 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 potential* 3ai pfb:/kr2+c yn u0hixg7c difference of cb*p2x / kryfui:0ignc7+3a h500 V. What 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 electric potential i/lljezir tth 5o/7.r2 d8f 7qdifference of 5007 jfhrtq t.il2/ied57 o/l 8rz 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 thrw-h3 t6zn 2vlm :k/pqhough a potential difference of 1200 V. What speed does it acquvh/:mt -h62zwk qp l3nire?

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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 movingus,a1+c z5qk8fmt+* ct5i s pq $8.5 \times 10^{18} \; electrons$?

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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 accelerate,a tx 8l 9vh-nys6ou0ad through a potential difference of 500 V. What is the velocity of the electron afterua y-ax,0o98v6l nhstward?

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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 acceleratmx nqe 90 e3*n-e0)unpibbdh0nw 67kjgc,u* v ed from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magn,pwi-nkb 0mvqx*7 eu 0de 3h0 9*nnb )6gucejnitude 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 /t:2 o,8brzd 9lhmrx m0z8dildifference between two parallel metal plates separated b9mrm0, zxdilz r8 bho2t:l8/dy 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, withdenu6g q-j5fp91*xum 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 potentixf9 eu- gqjp m5d1u6*nal 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 c9lx 3o)zcke)aie4n)rfcy7;directed toward the east. If the voltage measei)k 4 n 3ro9xeclf)cy)a7zc;ured 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 m along the direction of an emi47 k lh+l*t6zx/ wibj(4 cjjlectric field of magnitude 3.0 V/m. What itz6x j7 jc(i kmjb4hli+ l/w*4s the change 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 byat8l0*j u 3-uuvd 6rix 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 from the positive platj8 3it0r6uu-l uavd*xe, 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 connecebl ((dr3zm t8ted 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, how much kinetic energy doeszer ld(8 3bm(t 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,qqx33 *b+uzhq separated 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 xq 3bq*3q z+huplate. When the electron arrives at a distance 0.050 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 directed toward the east. If the lr / ,ky3:e5w8 wy50 yrf lqss10dnvtlvoltage measured relative to ground at a given point in the fi3df/rkvylrq8wy : nl l0,5ytsse0 5w1eld 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 east. If th.w k(ty+) cgthe 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 south k ).tgh+(cywtof 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 wu:)15e d+-zox wpng nmill acquire a kinetic energy (in the absence of friction) of 5 :mpnxuw)1egdo +nz-

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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 disttqm s-tv+ (fpqxmn6- /a-kou 6u5xmm/ance 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 69z f-qoz0 vb *bg3zv ork* 9)u1okindat the ends of a meter stick. Find the electrical potential for the center od *v onr1kvzkfbz9 b6i)0gq9*o-uo3 zf 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 gr v5pmr aqu-,i ,d41e(3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.0 m), ,g5-eia 1qpu4vdr rm?

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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 (op0nxydt) ;)+ih- u i kg.o:kq0, 0) 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 eon;:oki.hy gu xq)d k)ti+0p-lectric 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, 0vc,q x;5bog;b* wxohlvb8+t) ). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge fro8* bcho,obtlqwxx;;b vv +5)gm 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 *)gvm )bm2yhblz ft*/fov *x:-il 5xrof a rectangle of sides a and b. What is the potential at thho*by- m ))t5xvfvlmi2*xz: f lgb/r*e 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 ark4b i.+) v+t4fxcnh bfe placed in two diagonally opposite corners. In the other two corners are placed char+b)k 4h+4c.ivft fxbn ges 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, ma*z;xjho t 7l khy7c6286ehadw ss $6.64 \times 10^{-27} \; kg$) 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 mC5a l.lsv(7dywj wl6z*, at the corners of an equilateral5 *wldzsj. ly (aw67lv 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 capac; qcide.lqzz)slumh99 ) 8 2zaitor when it is charged to 100 V m9 hae.)9z s uld)q8i2cq;zlz?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacixf chu4( /r,tftor 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 with airuoj10t y *j1/ l(bjixy, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate arjyjojbx uly(it 011/ *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 capacitor has p *gc,olclapw pj.y2.:lates 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. ih9n287yx nucIf the potential difference between the plates is 2x7 29n8h nyuic000 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 connected across a 100-Vls z*nju8)+b z 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*jz)n8+lsz bu 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. How much energy is,w:,y h m,roi56qemcv stored in the capaw6 y, evc,,mh:qi5ormcitor?

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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 ej,wfyzq9yefo2;5yt 0h8mt8zg0ys;i* .m g nfnergy stored in the capacitor?g fjmi wyey;9, 8tzhtfgn 5z 8qm 0*y.2s0yf;o

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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 capacitovp dvqn 5z)d,2r when it is connected tozpv dvn)2 d,5q a 12.0-V 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 charged so that imx e5;up epd p-o3h 9bj :k.nnet/+jr.t 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 off9cwn)lz-yj j4/if na(x:,x f 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 6f)ham 1,cdu farea $1.5 \times 10^{-4} \; m^{2}$ 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 o8 gvysi fyb1n;/j awt t03)5cyf 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 with plate aj6 odmf nq:jp(288iere+s( h grea 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 p4wjlkh,d/f 3a late 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 battery and becomes fullyz,ihp a h2a57r 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 di75 za hiprh2,aelectric 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-g- w:/3xpaa-kox) ne fV 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 dielectrifoxkaw-/ p a eg3-n)x:c 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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