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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 v zcum0ivo. (s9ector?

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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 is ab*0m5bk cf -hd

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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 .ucjk,9bt wqh5aw3o7o2xlp( vo 20rh are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grou2b r2u 9opv (qc3ootawwhxh k57j0.l,nded. Which 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 elewu093m / xdqobctric 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 electric fiel jp3p1sefdudj0x *(l5vj 7h.fd

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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. /d86jd ug1 ixe 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 ifd c f8co4at+vjs,2lkb 56 d.ut b/hl2s accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what wic/a6bkufb4o5j8t s dv+clh d .f2l2t,ll 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 referred8w; yrgnr*pzmg s9fpc pb3on. ,h9/+u 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 equipotenti 0+haga9hv7d tal surface.ah+ 0 avdgt97h

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfacegvkca1ki-v2 / 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 byjrz2y cr- d-0s a particle carrying a charge equal to that on the electron as a result of msz0-r jrdc y2-oving 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 unit o.w:rizn: oo 5w nxnv4exc,4:mf

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspondsk7, be 8o;fk,nco uvxv8jo:; d 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 m from a positive point chaa(q-c *3rsq+sx5lb/ re dhf :nrge is 100 V. What is the absolute potential 4.0 m away from the sascxr-h35q drln/ :( +b*aeqfs me 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 9e6 h ldnx0(3zv3tzlsa distance of 2.0 m from a negative point charge is -100 V. What is the(9hstn3lx d levzz036 absolute potential 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 potential a wd7qp 69f43 uobmrb8it the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's cord6b93 mp4of7uriwq8b ners. 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 potentim;p)9lm 66r mhq4l48r : n1hlifal7n:teecsxal at the center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. Whslxcpri e;hmh4 l4:: 67m q fn 8t19)nelmalr6at 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 chwq)sx4 4 j6m gy3tic0:ywv3cib2f8 pkarges 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 ,h( xapr15 naka

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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 r ;qazvn;. )rllhs+/r hespect except that one has twice the plate area of the other. If the shs;./nrqz av r l;+lh)maller 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 capacitovre;b 2tpj3 eep-3;tvr has a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, wper3 e-3evb;j2 t;vp that 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 part4 .rk k2;oxgaallel-plate capacitor fully and then is removed. 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 betwr4tg .; aokk2xeen 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 l*2dg )4vp aombetween the plates of a given capacitor is weakened, the capacitan m*dogl 4a2)pvce 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 paralleltgq h4n2/ dyyw;dh-j7 -plate capacitor are maintained with constant voltage by a battery as they areyyghh- t;dq jd /472nw 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 are mamcmg5-yuw5+n,tj mx9intained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this prycm-9 w5 ,mnx+ugmt5jocess?

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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 betweta1 upa*ol,k9 1bjju;-w*ln uzdq7 n 1en the plates of a capaljab19-lpunun* azjqdw ku,o* t7 1;1citor.
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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 ckj+t3lze n w*cecmsz.c+x lu9y2q8 +/ apacitor. Whs+ke*yt q/cul3w 9cjx8en.2l m +czz+at 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 such as paper is placed between ttb ( 9t1ejg+oyhe plates of a capacitor holding a fixed charge. What happens to the electric field bet1gt+(ejo tby9ween 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*b9 .;vja qzrw 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 w.*;azr 9bvjqcharge 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)l x0oogsj39 r constant charge causes the energy stored iolx grs0oj39)n 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 enelx9 .xes hx7b gai0i33rgy stored in that capgxei7i 0 93h3 x.bslxaacitor 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 poi (uupep h;op*v /m(hjrv/gkn)n-*e z5 nt B. What is the potential difference betzu/vn k( /u(em ;n)o*hp-r* vh5ppegj ween 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 the potential is -50w-hw,sl)vdeiqnie4 l 18d2 4x4eyv5ooiu95 o V, to point B, where t o5l2oslqhdu4ei4w d ,e)w1 -ii54oxy9 venv8he 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 diffec 43obcj :vsh1sf2x+y rence of 500 V. What is the kinetic4:1s2 hoc+ ys3v cfxjb 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 t; 8-eoftp kx)hig 0-tv6k4-ddddw/ukhrough an electric potential difference of 500 V. What is the speed of the tf ux-divk-/ 8p hk;tdw64)doked0 -gproton?

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Starting from rest, 9eof1j, 7 igzja proton falls through a potential difference of 1200 V. What spe j7zo,i gfe91jed 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 d7w* z9 z:rj/et :vv wgv8+qocco 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 accele(t2c1kqkr jk:rated through a potential difference of 500 V. What is the velocity of the electron afterckq2r k1jt k(:ward?

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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 20w m2jkpk2 ze+e+;yf n5ksq,y4 mC. The object is accelerated from rest through4z ey;jkf+meq2+y,ws5pkk2 n 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 difference between two parin8 uksxn e-8t3:moo2 allel metal plates separated by 1.0 mm. What is the ele 8-snknom iutox:832ectric 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 pam e9ksjga 71*srallel to the +x axis. If the potenti k 91ss*jmega7al at x = 5.0 m is 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 east. Ifu45 -.cveow xq.z6k78rjd xz3uq (pnh the voltage measured relative to ground at a given pointuz.847hu(3 no jp vc -xxrze5 wkqd6.q 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 electric field of+fzvq ./ h6xvz magnitude 3.0 V/m. What is the change in kinetic energy of the protxvq+h /vzz6 .fon?

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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, hbi*z,r 9v2y dlj,o-aw zx/.sare connected to a 12-V battery. An electron released from rest at a location 0.10 m from trawi,j,ob. dv s9- hz/2xz*ylhe negative plate. When the electron arrives at a distance 1.50 m 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, se9/q gm(+i7a)fdxuiu qparated 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, houf9aquxq/g 7i +m( )diw 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 coa34s,qoz kwk7r.hie 7l)jvov; :pb s6nnected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron l.rk4oi:,q o)h7szkva ; evp6bjs w73arrives 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 electz4+d1jvzq 9a aric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a giv+4za jv91azd qen point 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 f1z v-j dz)uj950 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 the voltage at a point 1.d z-jvuz)j91f0 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 potentilz(73md n.;pmftn my *al difference of 12 V, it will acquire a kinetic energy (in the absence of fr;mndz(m* pynt3 mlf7 .iction) 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 distance ofjq0t4 )vs:c 9 gbin/fwetjz 4: $5.0 \times 10^{-10} \; m$ 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. oj.k3.9k- r7z: vzdtq,t -lgzp1xubo tux;8u Find the electrical potential for tzz-t jr t:.7udg8qx-k k.9zvb 1;t3ulp uox, ohe 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 atz rub(/j gqj3) (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at(bgz 3/rjqu) j 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)a msh rmy gmye*h,kq:7pid u28e6t.* /. If the potential is taken to:e *.ipk m,a7d*m grmhtu hs8y2/yq6e be zero 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 at (0, 0) and a -2.0-nC charge is..w, yfzej/akxkp ,v 2 at (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 from infinity to point (0, k,w fpj.y2.,kv e/azx 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 rectangle of sifsc.v, 1pe ol *ua6zl4des a anof14u a*6e,.z vllpcsd b. What is the 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)g m;(iu 3higx +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute pot()ggimxi;h 3 uential 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, maehuk/ideq9 )4 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 mC, at the coc/m-9 rulww o;rners of an eq9 w-l cr/;uowmuilateral 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 ohjg,ns-paa 6m* ;)i asn the plates of a 2.0-mF capacitor when it is charged to 100 -)hj*ag6 asips ma ,;nV?

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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 pl90lk thra,9nh ates 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 2,*n cmz6(shvjgboo 6are separated by 0.050 mm. If the capzh,gj2(*v6 o 6s nbmocacitance 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 capacitor has plates of areayo/ -jwt )s(nz $0.20 \; m^{2}$ 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. If the potential do jw+i0u8ieczbf(;k s..*z czv6- lesifference between the pla( 6i e0 -ju.l*vc .szbszec+o8fk w;zites 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 battery.5ly mn x8cmp d5;ehi, fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4e,m p; m5chdy.lx5 8ni.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 much energy is storew.dek wlk/0 tc -brmvr /t/+1bd in the capacitol dmbr/etvtw/w/+k b 1r.k-0c r?

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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 c s (a-tvgyh)cr 9u4ou)apacitor. What is the energy stored in the capacvt)g4a) hru9 ocsu-y( itor?

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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 capacitor when it is connej)shi;7(nrm 8l ra3 frcted to a 12.0-V battery. How much work was done in chargi(mjhl)fnar; r3s8 ri7 ng 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 thatyk8 z0 ei5 rh9hc70bqy 7yoys4 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 consists8r0o 8:6ihqigc n2b rw 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 confyegm p b, )pfb83-p5wsists 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 of areo( wu5r to1hxr3j6.wweri+d dbh38-agu n( b,a $1.5 \times 10^{-4} \; m^{2}$ 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 0of8hr1swhy l6j o1 .9h0* ifxnfeo1zconstructed 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 capacitpvh;sp*)u*2f 0y ejzw8h-/c b gfzu6gor is constructed 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 and becomes fully c (cri w1m/gctrn,6;kd harged. The battery is removed and a slab of dielectric that completely fills thri(;c1m/ d6tn ,rgckwe 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 1)suep 5pocdr4, d2ia connected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completelypu4cpae5rds)1 2 id,o 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 slab is inserted?

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