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习题练习:Physics Unit17: Electric Potential

 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 following is not a vejom 1nd*dti ys5,f(i5ctor?

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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 iu+eq: 1ivjw* ps 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 insulated from their surroun+ 3jv0 vmv (vzntuyu 1vcu:7d7dings. Object A has a net charge of excess electrons. Object B is grounded. Wd v1u +vn(t:uvz3 cy07jumv7vhich 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 of the elect;57*kym n9gah +a ondvric 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 tzz;94cti mlm( he 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.t8: tn*6ur0 y-dld cck2mnyi8 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 speq k5twvr8(ms ;gb*2mv ed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new ;*25sq vv(b8tgkm mrw 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 poi ze+ yory *wjb:g)y.kbg2 3gdspb:b(8nts 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 equipotential sur:4hs q3jmadf1 face.m1:dj3s4q f ha

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus qhzj-4gmbi.ln /9jhh3-ve f2 t 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 c,jxhyu j5n /(jhq 4gl,arrying a charge equal to that on the electron as a result juq(4,xjhlg,h j5n/y 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 u1pd 9 a/+ogclynit 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 co1ddsumt e7r(/p 6wv kvx/x(s /rresponds 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 kl9co/rs+ o9na9*i8* k(ty djizpl6om from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same+kr 9tynioa*co6*l/o(9d ipl8jk 9z s 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 at0+ goco+u; lln a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same u0o++nolgl c;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 ceh lrtmnc52l5z t *:;pvnter of a square is 3.0 V when a charge of +Q is located at one of the square's ch2t :m;5lrz5 *vcpnltorners. 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 Vbd y koy.ev*vq5(+u-v when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square y-k 5vu.(y* qbv+vdoe'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 alwaysxyhdpvhiqwl; 9zu--mp6h.zcef.: t )-*o o1 s 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 pmlhi a 4q7jks1,-kq)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 except that one hasb 98w +2nglkv vzh3ab8 twice the plate area of the other. If the smaller capacitor has capacitance z83khwv9+l 82nbvga b 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 plsoxn k9 .ak.b)ates is doubled and the distance between the plates is h sxa9n)k.b.ok alved, 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 v2h-gkoj6f2wf j;zh;c+ea/(zf ax6f then is removed. The plates are im kzh22ex;f-6c6 f v j(hgzaw;ff+j/aomediately 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 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 capacitor .bpgp 7/u-pj ris weakened, the capacitbgp 7/pjp- u.rance 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 maintained withk5glmnsg okvt.xf9*od2)0 x: constant voltage by a battery as they are pulled apart. og :kf9xk *v.)dgsl2 5mt0nxo 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 are maintar9aifju xt -7u5z/z, kined with constant voltage by a batterf /z -,9r 7iuk5xztaujy 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 dielectrr4 r.;vq wcumyefx:7/ xq7en)g xe-r 4ic material between the plates of a capacitor.;7e.u :7eyqrre)4w -/xmx qxg4rv cn f
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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 capatb5 *:l zqiz9ucitor. What happens to the cz5q9 i z:u*ltbapacitance?

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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 ixde.z ,onw074 :onxk ns placed between the plates of a capacitor holding a fixed charge. Whaxo ndo:kz7 ., e0x4nwnt 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 becomesy/l5e yh 7s1vxhl;iv, fully charged. The capacitor is then disconnected, and the separation between the xyl i;eh/5vyhsl7v1 ,plates is 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 capacitance of a capacitor holding a constant charge causes c)jil /ztql 0a(5;up4zi g7agthe energy stored in thagq pzl l(0iaa)u 7;gic45jz/tt 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 thfm) 8 li 22cpjb1uh5f3kte g/eat capal2pmfh e tcjf u1)5g/bk2i8e3citor 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 qlgv09kk*.0) ihwngj is the potential differen) *whv.jigq09 0klkn gce 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 twwq88hi/lr. y:qox0 a he potential is -50 V, wl/8r.h0qwqy 8:x a oito 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 po ; *d77hyeegtltential difference of 500 V. What is the kinetic en *e dl7ehy7;tgergy 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, bg:o t r74d81x- aynlzis accelerated through an electric potential difference of 500 V. What is theb-ztdal1r7g 4yxn :o 8 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 pee7x 6v)9 hgkxotential difference of 1200 V. What speed does it acque9hxe7x6v gk )ire?

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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 def(hu wphd,a2l:94 b 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 a potential difference of 500 V.rr)/1jy x9ohee re.0 b What is the velocity ./rxe0rrj19 hbeoey) 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 xh(i2 p/gmt e/b /ztw8object is accelerated from rest throe/ (gth/8p 2mzti/w xbugh 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 differencaa9f .bjbt-5cziei2 ; e between two parallel met5bbt;.z i faj9ceai2-al 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 magnizen8,mco0 gmq9z19g jp:okl 1tude 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 potential at x = 2.cjz1l 0mn:8919z gpo m o,egqk0 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 o r*ep5zldm5,c f 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 5pzc*5 edrl ,m1.0 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 t52-v(gwph vbmhe direction of an electric field of magnitude 3.0 V/m. What is b mv-wh2g5p(v 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 by 0.20 m, are connected t rr1-o0vfvx1r o 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 plate, what is the potential difference between the initialrf11r rx0vvo- 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 connehriom /;.g412eyj qkf cted to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. Whghy/kq ;4 fjer.i1m2oen 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 izsi3d(xe -29aa; 41n+gw+rt pkx pvr0.20 m, are connected to a 12-V battery. An electron (rg 3aps1ad z-ir9k24twx;epin x+v+ 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 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 390wifipdqjl* d2em-xk;jf * /C directed toward the east. If the voltage measured relative to ground at a given j32q k*mpe -0*fw9ijidfx;dlpoint 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 the easf,15x-se m-z zw-sy2ct *husht. 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 south of thatxs21*-czu, s shhy-wmef- z5t 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 differenm6y,6nxg/fku xcp2n 7ce of 12 V, it will acquire a kinetic energy (in fn7xgyu2 6mpkc/ x6,nthe 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 distahl.fhax+nmi9 5yn92 u bu fz5/nce 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 99rsl:w lv jll1z*9kpa meter stick. Find the electrical potential forwjzsll19* p9:vlr9kl 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 -2.0-nC charge is at (3.0 m, 0). w)v*wa8 e*kk dIf the potential is taken to be zero at infinity, whk*kav* )w dew8at 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-ip9j x27xbz s7nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinityxi7x279z b psj, 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 atavouv+kv:6p;j/4m r h (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from4j6;khov/v: v+aupm r 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 th bzrs 4)bf:rgvvm,v96 e corners 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 cm, and b = 4.0 vmgrz6)f,s:v b b v49rcm?

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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 placedjwki/cpp9+2*ocv8 na in two diagonally opposite corners. In the oth*k/2 +w8i 9aponv cjcper 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, masi9nge/rr 5 s;:j2navd;x s(rgs $6.64 \times 10^{-27} \; kg$) 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 tr4:y*e ev 5v)c lw:mgnhe corners of an equil)*e :c5e:wmvr 4v nylgateral 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 charged tofs-ey4,yx *i,qz)) :t xoaykk 100 Vxyo)tz-*k :yk s4q i )yxf,a,e?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capa lu;u+e lnnh7;+wftf7citor 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 w1da ld cy(bml;czk*(q22rcn5 ith air, and the plates are separated by 0az;(5 cc1blrmd22y nd l qk*(c.050 mm. If the capacitance 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 capacitjkv0ij9 gv0l 3or 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 separation2zg8ntla v 8j*9xzq*(x dr)rv 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 ele)r qa2x9zgdn8 ( zvvtrjx **l8ctric 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-V b zpclmjnayc ..yijqxe/9h0(46sk-z s *6ig 3gattery. 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, whlqa6c ygk. z(*zn.im 0 9jjc4 3 -px6ishesy/gich 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 storecc1d 1ri(5he rv,0rx4t;ssz wmai, (cd in ths ih, rrrmt5 e;cv,as4(x(1w 10dcciz e 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 capacim+s 43bdjpw p+ e;l6qotor. What is the energy stored in the capacitordpo+bw6 mqpsl;+ j 3e4?

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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 thegi23fe;o0ev/hw76729pbx gv w k xfbh plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacihpo73eih 2 ; 7f2fexwv9k/ x6 gb0vgwbtor?

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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 pg 1str .zb kjzn6 lv/qh4996uq5l3aithat 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).r7vga *vnw x 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 platdhq -xf; 1zt 5s;tw.qces 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 consistsskrspt, ,wv ;l iq,o(b5 g7v3s 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 const7.5vo*b5.jwz kyxf+r9 myj hvructed 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 con z1r0gdmlr1- t8dgl bxv)sp,* structed 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 50-V battery anvd b* jidixmp56x*5fg:8x v)yd becomes fully charged. They*8x 5g *vxjif56:bimvdxd)p 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 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 fulwq)o 2qps.:3iczv ;wmly 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 is the voltage across the capacitor's plates after the slab2cq ;ws.v3:wzoi)p mq is inserted?

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总分:75分 及格:45分 时间:不限时
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