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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 vect0jlklkg*icj 2f-,kw 6(0v pwnor?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomk,bon e(yc- z(b 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 aluminuqxx(k)0t qd h6m objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher pq6 )xqktdh(0x otential?

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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 dkmen v;w . q0k/t; 6vp-ojgdx3irection 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 dire6 uw:8s:i-k8)kqlxmd zr4z q9cty sg)ction 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 a hotq zxf2,c x du:68(f)mpkb sx vrn78y(llow 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 toilb5byw7z j9j i.( x:p a speed v by a 500 V potential difference. If the potential difference is changed to 20w j.pbxlz(ji i9b:7y 500 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 is referred to 7(ibk g3cshlkf3g8q 1 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 2y07 pkj7toadpoint A to point B along an equipotential surfaceady7jk top02 7.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfa1ukvqhmkd99;y+ my)0vx1 tu cce 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 thaynts ug81-p +ut on the electron as a result of moving through a potential difference of +yp1tsg n -8uuone 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 ofh:, tltq,0 0rtq mdlisi 4l68q

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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+shgw,c*44 , tv2aio7ev xmyc

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential a4nrnv0-2y n ;pcqfy+u qn;:nlt a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away : f0;;y+prnqq2 lv-nunnyc n4 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 :(ea: q0mycyrj0 zt snv66ui3 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same 60 yezcqr m:njvasiu t6 :y03(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 when a 1 0d+ rgu8y+wiiq y1lp,coy vg5 klu5)charge of +Q is located at one of the square's corners. What is the absolute pq15ugy 1 kiv g8)p+ y0 lwuod5+rclyi,otential 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 cosd - 7:pl36fic78x(ok3 zzhgaqm x0;e e*ll penter of a square is 3.0 V when a charge of +Q is located at one of the square's corners. ze0l-kx;ha (mzdgo8673 3qeicpp x7o llsf:* 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 two charges th qlsc; k2*yug:at 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 i3k- dxb lqm2i2s 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 except that onvh;xyfz2b 6 +xh -p hbw3p* 4x.pqpze(e has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger onx(3pp-;2vehbfxhh. x ypzzw+4 q6p b *e 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 platekk5s6 89do nuis is doun8usok9 k65i dbled 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 paraz c99dujw : -*q7bvrirllel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on tj-:z799brvcu *w rid qhe 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 capaooy/z-as2 h c9gg e4r-citor is weakened, the capacitance of t-e oa2/49 gsozhg -rychat 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 capacide ihni4mbf 3szxm0 2x/717zmtor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on theh/dxz13bmfi ezin 4mx077 2sm 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 u c9oi5*ga ynzgh8 hkz-4 25geby a batgk55h4h *8i zucgyezgo2a9- ntery as 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 dsso bks- 2m:*an vei;,ielectric material between the plates of a capaci b v sk,nsa;-*s:moe2itor.
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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 pla,c2wj1id/ rkn5 a zro8tes of a capacitor. What hap8wck5 di,/orjz nr 2a1pens 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 paper is placed(;d1l (fc wx/wtlf+lb between the plates of a capacitor hoft(lflcdw( /lw+bx; 1lding a fixed 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 becom tkz6bqr3-h 49 ubxus*es 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 this car4k6b z*- hu3uqbs t9xpacitor 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(xv0 4z8a j1gzlsave: constant charge causes the energy stoz1za(lvj0x g: v8e4s ared 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 storedwsx,d1 i9m+ gff 9cds. in that capacs.d xgc1sdf9+mwi f9,itor 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 tovkyv+ dzdn,1 )q:+neo move 10 C of charge from point A to point B. What is thkz+ +dn1vy:)qev,o d ne potential 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 an1o9 fow:q-p,s 8x1x l -pbw;ihy4l mhb electron from point A, where the potential is -50 V, to point B, where the potential is +50 Vpxlh 8:1qf;w s b 19womoy-x,-4p lbhi, 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 potent7e)ja1z4 i9k 9lq lin)dg;onwcg hv:9ial difference of 500 V. What is the kinetic energy of nl:7ii4n)9elgh d)gqo av9j 9k1wcz ;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 electri49ihml+p*7:mjq bw c cc potential difference of 500 V. What ismhcmlq jcbi7: w9* +4p 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 thrp.g4ci k mqqr5e4w6hr(6vh4bough a potential difference of 1200 V. What qpb(e4c45h w6.i hkrr46g qvm 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+,1 eapwd0s43yq,nht7zqzce9ei cq - .0 V do in moving $8.5 \times 10^{18} \; electrons$?

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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 a5 hl:r8htsp;v potential difference of 500 V. What is the velocity of the electrl8 thsr5 hpv;:on 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 cha4hktogu942+.s maybhrge of 20 mC. The object is accelerated from rest th9hut4om.kbh4 sg +y2arough a potential difference, 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 diff1b9 nrq .q 7hru6w3*dvzi,qenerence between two parallel metal plates sepzhwqrd3 vuq 6eiqr7n n*,.1 9barated 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 parxfu80np bye2 4allel to the +x axis. If the potential at x = 5.0 m is 2500 V, wfyxeub80pn 4 2hat 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 4z3cns4 a53 9ts+6wsvfz e ghgkfn );rdirected 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 m4+h4 6c)nfzsk n3e safv9wt35;sz g gr 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 fieldo 1bik p;.lep) of magnitude 3.0 V/m. What is the change in kinetic energy.e p1lbp)o ik; 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. n ,,nu yt53 x nhhyrf2z-0kpj1An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 1.50 m, j1znynx,0trh2hfpn -53k u y 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- n .w8moje)khk9y vp9. An electron released from rest at a locationkjwm)e9nvy-. o9 8phk 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 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, seacs5gs(8h7k + ypsa:mparated 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 electrsym agh 75:s(a8+c spkon?

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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 thew7s4ka, dj- f1wvu la0 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 east of w7sj,l w4ad0k1 - vuafthe 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 electc7px f*al i:bwl;-,ct ric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in xi7w lfcp-b a*l,t:;c 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 thmisqx8lbmsx4n 7e. z (;d6p l6rough a potential difference of 12 V, it will acquire a kinetic en4 ;(s8l6xqmnzlxibm6sp ed 7.ergy (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 a distancg- 6q)5wmmw4pj3b fh re 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 arh+2q2-y/ tlrdpmxu ou 6+m3cj e at the ends of a meter stick. Find the electrical potential for the 2txyo u 3-lrc6md2mjpq uh++ /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 m, 0). If the p(gdep,s xy)ki; t5yo 0 0+(-jbrlv kojotential is taken tk0rdpyxsl + (k5 ;yj-iv,etb j0(og) oo 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 3mg66 ztq12fl*axabe is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4lm qxg2 6 ebt61zaa3*f.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 thed iix rj7 on4nk.o*lpy:um y s5b05(3i potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge n0ys53d7 5r*o nyl(. iu4j:boixk mpifrom 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 cor4elel8m 3ppo i lw01f,ners 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 ,pol4l180 ipmfee3 w lcm, 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 diagonalln5e dag8,me99 6b zzlwhw/qo,y opposite corners. In the other two corners are placed charges of +3.0 m5ge/h bo,zdn 9zm98qe6law w,C 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,nvarcm ypi1)6,m(c9r cj,m, p 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 plvh.bu+7gcf e var*) ko,l;s1cace three charges, each of 2.0 mC, at the corners of an equilateral triangle ofg) * oe7hs,+kav cruf1bv.lc; 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 whe bgs6e+fu 3bz*n it is charged to 100 V6 3suf*bzeb+g ?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capac+ nyc)2+y;emfk)6*ckusr p*3l csegwitor 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 air, and thd-jxl n)g kdjf ;0w8t*e plates are separated by 0.050 mm. If the capacitance is 17.3 pF, wha0jt*g ;xw)f k8nlj- ddt 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 capacitordq pw5q)m2e n8 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 separation of 5.0 v8/y bdhc/2l u9r7bsm cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field yvm us9/dlb27h/ 8rcb 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 acru2be lga,ez/;* gy+zj :g4jzb oss a 100-V 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 the battery, which remained coj ;z+4ge*2l/u:geba,bzyj zg nnected 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:u9sxksbws)lr l ;z: qv*h-c, mF capacitor. How much energy is stored in the capacits*9- ql,suzl: ;)hvxkwbs r:c or?

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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. W d 69oen8oeq,goi0u 5mhat is the energy stored in the capacito8mdi6g9 eo5q u0 o,neor?

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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 flon4p2qaug.qqgd9zm06mh i ; e6ws onto the plates of a capacitor when it is connected to a 12.0-64 g agpq6mqu;zdehm.2 0nqi9V 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 z:smopnw -/4-hgii:b 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 capagm4k5eqd4m v ;2dcw.l ng3*jl 4pfu n; sby+p(citor 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 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 plate3gi-- bdj6nb fs 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 o6 k44qvl kc h(as(8qulf 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 ism y r sm2qh9.og;9x).no(stem 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 with plate area ojq5+ uv-siz+si4yq a3 f $0.40 \; m^{2}$ 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 connectdc.w j 36.z0kly /lq:8ew oxtged 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 .08g .6ocdy xlwwek /3:lqjztplates 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 fu kmq+mb;h m3dzo5w9- flly 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 diedmm- zwmo; qk 3bf+h59lectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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