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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 veq7c1q 3eb 8 oom7pbipxbx/e.3 ctor?

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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 i .voioea.q,;;abw 7d gs 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 surroundings. i:d1l 9 e vtz: dck;l7jm;p69rod0kaf Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher pot;0dp o 1lf l79i e:r k69jcakd;zvtmd:ential?

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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 ofc i54 e9u(jqsf 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 the electvb ,yp-h wb9-ivx+ d:hric 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 spherhy6c12sib .wsrxfgg .jf/(t ,e. 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 accelerl esr(e9(sa5d2lltrx70vd) pated from rest to a speed v by a 500 V potential difference. If the potential diffel2lts d7(r5 rx e0)a(es9vdpl rence 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 sqlb+h4s1 km5s 6ie5* u3q weecame 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 surfbf 8xj gqt)a(gd*tx.5ace..g8a xxdg*5 jqbf t()t

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfamn)vj 9 *cci(aydl1*i ce 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 1kaft+qsu e, 7y v6y(/fh6,dsqy7jb: n/m mklthat on the electron as a result of q1st+ayj/n(776/vhm yel kmb, 6ys , uq:k ffdmoving 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 un dnz78 nq,a*4p hmm,zwit 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 tnaal 54e2;ozm o

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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 c4k um(ib.pb:y4c:y 76zfuixrharge is 100 V. What is the absolute potentiaybuyi :4.6i r cb4(uxf zmk:p7l 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 negs, e*ef,o:p1f qb/ch vative point charge is -100 V. What is the absolute pofep, 1cf/se:,*vbqho tential 4.0 m away from 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 potentiaa0lrf 8hx)i38lvp me37ign8ml at the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute po alegf 8vin) lm3xrm3 h807ip8tential 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 charge of2;sr w k7siok,m(yz-b +Q is located at one of the square's corners. What is the absolute potential,s yo(7w2kzi- srb;mk 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 o,4xod0zg6 icxf 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 j,, s bxbnc:n0l4nib7 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 exce*7rhfuw n-3 lx6dne7dnb33qtpt that one has twice the plate area of the other. If the smaller 3 urbh6l7fe *wtn -dq3ndx37 ncapacitor 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 has a capacitance of C. If tho2a :;k g0p: k1rehxwx2z )vypt)3ry me area of the plates is doubled and the distance between the plates p )y: 0k2;x3kteog pz2hymxrvw ra):1 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 an 7)ld2;j 4u5*vdsp lkp-idx0y.kw tsnd then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount l y7s 2k*; xws tp5u)-kpnj.dil4vdd0of 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 c 4u,avmv/iczxs4o632q yky+v ;qhym: apacitor is weakened, the capacitance of that capacitqvz2qyucym+xa is/3vyh4 6:v m,;ok4 or

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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 maintain)d 4ogv7m+nlh,cooy -aldq(:ed with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates mustl 4:mdnavog,+(d q)oc h7ylo-

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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 constai yw -w3zjftq/4 ((uzent voltage by a battery as they are pulled apart. What he/3iwz-4tz(f yu (qj wappens 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 matz+,- wr f3tbi3q- yil uea.c7kerial between the plates of a cap 7 waq,eirc lzt3.k3fyb+u- i-acitor.
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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 capacd+c8 5o aakut3itor.kcodta+5 8 u3a What 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 i)0e,i ug p.zcv+5zwfgduh9 6such as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between the pl +,ii0 .cg ud9z)5ufph6gz vweates?

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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 ayttd3. epe1j4nd 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 enertj .d e1ty4e3pgy 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 chargua:01pm vmow (mg6y /-onltv-e causes the energy stored in that capacitor tm61wa ynvtpom(o0: ug vl--/mo

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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 *qet 4bfe3ka2w e 2:ofcapacitor causes the energy stored in that cakeq3e:f*t2be fao4w2pacitor 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 energyc 5h-mz( a2watvg 38jp mg28qu to move 10 C of charge from point A to point B. What is the potential diffhqta w g825u8gpzc3jm 2v-m( aerence 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 a+-bdhg .e pj3qn electron from point A, where the potential is -50 V, to point B, where the potential is +50 3egdq.h+jp b- 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 pote y j9m.8zn*o7lps hta7ntial difference of 500 V. What is the kinetic energy of theylnoh7.p sj 9m tza*87 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 kp qputz r)v:z +y9f9+an electric potential difference of 500 V. What is the spep z+kq f zup+:v)9yr9ted 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 differek bqjk3rc n2(cah7(kjy11vv5nce of 1200 V. What sj(c3 5 7q1nay2hkbjvkk( r vc1peed 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 moz8 j8cjwifm1 jbbjd4,b1v7 a(ving $8.5 \times 10^{18} \; electrons$?

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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 accel5dh1 (pn fxkr1bvt4 sbdhw(+6 erated through a potential difference of 500 V. What is the velocity of the electron prt1db(x4+1n(hd 56fkwv h s bafterward?

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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. Thzz6sy,+gwb 9sf9url7,xs +yz oy a 72fe object is accelerated from rest through a potential differesl2 u7xr,wz 9z+g6s9yo,fz ab+7 fsyynce, 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 difference between tw )sbzcp+b )9i n-atk4no parallel metal plates separated by 1.0 mm. What is the electric field between th9tkz cp+ -nbban) s)i4e 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,rcq0 lyi m/9l- with 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 potencqli/- 09lr mytial 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 l: 0t;xcd( cvutoward 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 m x;ctv:dcl( u0 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 magnv xz hn /jbn(z.j4*(hlitude 3.0 V/m. What is the change in kinetic energhj(4 . zb( */ljznhnxvy 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 battertdpm7 vs38n /oy. 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 popt/n3d7 vs8mositive 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 batterh6a0gv + gxi380 qcvkty. 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 fro0ah8c06g t3v vig +kxqm 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 0.20 m, are connec0avhcgmc,e x /8f2 r5kted 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 th 2kccxv,0e f8 5mar/hge 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 ksi8ukbg /w50+ n m(mothe voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a pok u+msm5bk0w/in(g o8int 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 k o:;23rizj(m gth;xta c3fv- east. If the voltage measured relative to;f aktz3o g2:rtjcv-i3h(m ;x 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 acqw;,w)es/ gf93dze v n l4dib4juire a kinetic vew 4z)4lsjddf/n 9,b;iwge3 energy (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 af p4dlm*+ .x+wwnn 3mm distance 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 tug/g ov-2x*t 0jig ss*he ends of a meter stick. Find the electrical potential for the center of the meter sticoug /v*gj0gs-i x2* stk.

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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 -2b(6a ri.f ztxhc(fr63 .0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what isz6.rxfc3a tr(h(6f bi 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) clr0zgd6w ewf0 odn+ *4rnb ;(and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be z c nod(rre;b+l4w *gw z6d00nfero 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 a* +z5 xkq,hajmdkv:d d*6 2s ,:haojrjt (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potenti*jhjsd q,oz+kjaxh, *:a m:2dv65d rkal is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to point (0, 4.0 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 of a 5fem.r1 a dm)1c (si0fvt8npn rectangle of sides a and b. What is the potential at the center of the re0enr.ca tp fvmd8mi1n5(s1f )ctangle 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 placepjinsg ,t )qnzgnvuv( )p (,:k3t/ i-tn8 *jfkd in two diagonally opposite cornk( stfzn) pt/*:jgiq(3n,n ,v8pujk gi)t-vn ers. 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 fqp v)q2pe18mh s8+f:ma zxw3+2e, 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 pqfhh5hbm l1b b).8kr.lace three charges, each of 2.0 mC, at the corners of an equilateral .8. b f ql)hrh1h5bkbmtriangle 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-m,k*d)t)hmk :k3x1scnnzn*zz F capacitor when it is charged to 100 m*:1,xs)n*k nh c)z kt3zdnkzV?

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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 a;a w44zim9gov* rbbi 2rea $0.50 \; m^{2}$ 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, am8 f0 b ygn0fq,7nshd3nd the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the platenhy d n f,sqb37g0f08m 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 capqbi tc x p6,b92se1joy p5sd.v*9kk5oacitor 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 separatio7x) y+b86eaa,vral udn of 5.0 cm. If the potential diffe 6x)8yv 7lau,ae ba+drrence between 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 connected across a 100-V battery. After the xv xo- )b6cjkw7u3rn+ battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectricnvo-3x7w +kxb rj u)c6 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. How muvmyel60v: c38 p o,xbbch energy is stored in t0yv c:bel x6m3p bv,o8he 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 capacitor. What-x + 0hpk;fswa is the energy stored in the capacitor?fhs ;p-x+kw0a

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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 cap*kpg xd3z7f r-acitor when it is connected to a 12.0-V battery. How mu df*zr-3pk 7xgch 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 chnij7p;4vwf5)vrlww c+gv:q, * kf: jj arged so 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 capacitor consists of plates o lqwh.ypdmg52abx: qgze 5/ 1)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 consist 7xp)8cun-lnis 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 con;ssfp9 o v78gxsists 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 cowv/ey 0h 7 bedvb*mxt69 d* x;i+va7epnstructed 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:r+ev4 tzq zr. lwjo2( 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 connectedi 4+-0 htt0-l,bswj x,dculvi 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 plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the capacitance of thlwjt-bd0 i x0t chls,-viu,+4e 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 :p7)wq/u+kft hwky2v connected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills wwhpkt+q :v 2/)fkuy 7the 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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