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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 no)o+.a;jt fo p)uqs (wqt a 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 coulomp9 toazfoz(1 : 95ygy+, zlbisb 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 aluminum objects are insulasy2az jzxg/0 1ted from their surroundings. Object A h2yz zj 1as/0xgas a net charge of excess electrons. Object B is grounded. 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 v fuzpt:nsuq y4 1z*a.*v:+v)g,rkohin the direction 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 directionw94v jp7 nx*rn 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 hollow condrsgagk4u6;o :y6mp +jdzt l;1ucting 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 by sr6okv1, njie6, ve ,oa 500 V potential difference. If the potential difference is changed to 2ei,ejvk6,1no rv 6os ,000 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 art ;:p139mhsxjwxzmt0 3 0ugsj e 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 tk 29fc2 bkiu*hhhy,21sz6 c sao point B along an equipotential surfac1k k s 9ha2yhzhb*,ifc2u 6c2se.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mustze4m1b.odn, ds1iy3 m 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 q6q8 5 -g+ bxs+iznknfparticle carrying a charge equal to that on the electron as a result of moving through a potential difference of ozq-5s6qx 8fn+gki b+nne 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 u negk+lxzfup6anrp;,4 ( ,cj ;nit 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 *i gw6dl(uw 2s2 r* gh2ifcmb)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 up d.1*sin6x/en sz4i-,k:towep9f y2.0 m from a positive point charge is 100 V. What is the un, o*/n-x ip1sfse9d4.:kpize6 wyt absolute potential 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 negative point charge is e9muo1 h/fan0 -100 V. What is the absolute potential 4.0 m away from the same point chaname91 hfou0 /rge?

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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 thel8 4 *:oj)g*s 9cjcyzo2eztay exact center of a square is 3.0 V when a charge of +Q is located at one of the square's corner 9e 8acc*s4:g yz)zty*jol2jos. 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 V when a charge of +Qew a7l -h4m)k90iqmir is located at one of the square's corners. What is the absolute poten w-ii07 qek)4rmhma l9tial 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 char1 it)mu/ ,oyvj f6ao9tges 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 9pz j*cio.nf-g w ( fnp1p4;- biji-oga

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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 ident6 tqn* :ezm*dcnr/x(bical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has qcnb(:zm6d* xe/tr *ncapacitance

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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 capacilb7pmp.0 gf9 j af(7vsbz-m;wtance of C. If the area of the plates is doubled and the distance between the plates is halved, what is7vf(7.ba pfzbw0 -mg ls9j;pm 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 rehd)5eqcxvk2sb* u*8 y moved. 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 between the p2 dkhuxbcv85*ys )eq*lates 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 is weakex3oe1+rqxh-,z zb4kw/ q a+w vned, the c-bkvqa+xr1x+w o/e zh zwq, 43apacitance 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 with constawxsiw ;au7j 5k ocp+40nt voltage by a battery as they are pulled apart. D5 +c470uaj xpkowws ;iuring 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 maintained with constant voltage 8 ;romy lu e5am*8lcfy jg6l*3by a battery as they are pulled apart. What happen* mluo856lly amfc rgy* j38e;s 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 bx g-m7ot9s y*yetween the plates of a capa9yxyostm -*g 7citor.
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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 plate lv6wpiwe.vwz)h10 w*s of a capacitor. What happens to the capacitanh6p.1z0lww iw) *vwve ce?

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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 the plates of f i hyip4lbx1- r.,ld:a capacitor holding a fix- p1,yb hr:xf4lil.ided 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 becomes fully c jlh42hj6pg c,-jbz)uharged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leakb)l z 6hgjp4j chu-j,2s 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 constaapy xj-8e (zxxme, d)-nt charge causes the energype(zdx8-m,xyj ax e-) stored 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 tp8a so cwuz s,su51/p:he energy stored in that capacitor t:a1 pz8 ups,/sow us5co

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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 m gev1bn7m1, bpoint B. What is the potential difference between points A andv,m 7mg11nbeb 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 po4wh; fgmb+ t8-wceetdv/ . ,uoint A, where the potential is -50 V, to point B, where the pote/.,fmwdg -ot;+ hbveecw8 t4 untial 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 throug5od p) 7b+en:bv0o3j(ze cxwfh an electric potential difference of 500 V. What is the kinetic energy of the prjd)v :(nbb+3we c5e7foop xz0oton?

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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 ac/zmt( rcf (q,d*r9sjdcelerated through an electric potential difference of 500 V. What is the spz9r( tqm*, (j/ddcrfs eed 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 differ+ )bdfe x(am/i3 azpo-ence of 1200 V. What speed does it acquirea xf mo3)-z/bdp (+aie?

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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 movdehd;sd+8 2h4k- um9 d/cehesing $8.5 \times 10^{18} \; electrons$?

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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 throughswmi 4 l+;;co(mj0 i s(yyih;uzd3-a p a potential difference of 500 V. What is lio-0(4zu( yh w3i m ;c+i;da;jssymp the velocity 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 object is accelerated from r4pxw uus b4 hpxljt5t7/.xkz*++2p gyest through a potential difference, and afterward the ball is m547t4utjgx2/ bxu* .sy+zhw xppp+kloving 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 wg b( mr1i58uadifference between two parallel metal plates separated by 1.0 mm. What is the elec g8u m(b1rw5iatric 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, wit0r;5.f r:bi(g ,,ysa qlhuueq h a magnitude of 500 V/m, is directed parallel to the +x axis. ay bgi,0r;rsuehqu .:5,l(fq If the potential 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 east1;v9/hu7 n ecbt+iouzxrm* / j. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a poin 7+umn eb/*hzijuo 19;t xv/rct 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 magn;-t5pielk)yi:e;tn4+ sqn5u0z 7qxwzj ke n6itude 3.0 V/m. What is the change in kinetic energy oknnjel7 e +)tkn50iz4sqy;-xue i6tpq5;:z wf 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 byqsy t yh5f:p+y .h z5bmg,hm.7s6 ep:u 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 arpm: e7g6. hm,tpyqu5: sf y+5hz.ys hbrives 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, sepaco1ppb)d:9 a8 cg i7jprated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the 9jgbpa dopic1 8 )p:c7negative 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, separated by 0.20 m, are cv.lnjkhe0 9 f(. sdcf1onnected to a 12-V battery. An electron released from rest at a location 0.109d .esvh1f. n(fcj0k l 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 fql3;z:mn 3h; ym-t ezjxk8 ak:ield of 50 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 volt; e:q nam3-mzjxkh z:k;38lytage 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 Njk .vq.ce v84qx:8+oezd1qh q /C directed toward the east. If the voltage measured relative to ground cqevkx4+j. oehq:q8q81 dvz. 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 poto0kjz-6 v43qv *ozefrrb g7z 6ential difference of 12 V, it will acquire a kinetic energy (in the absence or zo*v407ob 6kz3 -jz6fregqvf 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 ati:6y+ew)g pyz a 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 the ends of a meter stick. Find the electri -mek )tdtzo3do+( k1gcal potential for the center of the meter stgk)1eo+od(d 3 km t-ztick.

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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 pjtm7u ,o b+b*bgh.rhm15n+wfotential is taken to be zero at infinity, what is the electricugmwb mj+br* .bnfh, ht715 o+ 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 is at ( vlc )trxv 5*bgb7ed9*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, 4.xcg t7*5bbv9rv d)el*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 an q: 5sl,wk2iyo wfu1hr w/;u5t (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zer 5 ho:u,wisr1w lkw5fy; qu/2no 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 corner:jcsh4y xvwd op;c9-b5vl 4-qs of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 pxvd;y4: o4-qw-c5s j9cvblhmC, 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 sid:v: : nic1ot 8+nko/rbull z/ge. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +31ck :l :on8g +/zlb rtv:nuo/i.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 +2yd j9u:m4gfn7 e, 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 place three ausjy /0gh9p4charges, each of 2.0 mC, at the corners of an equilateral triangle of 0g/u49a phsjy 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 itd) wclk6 q+tb 5vs3)e 34snogs charged to 100bgtks6dw )q4cvl o3en +5s)3t V?

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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 has9q. bph7kxpj-ew3wv o*r * t*(wjry.pl rr+c3 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 the plates are separated by 0;5hv6t tij v)ql0wr;8d dfik4.050 mm. If the capacitance is 17.3 pF, what is tw60; vr;)vid5tkfjd 8qlt 4ihhe 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 ar44(px.foggy -co 2a zxea $0.20 \; m^{2}$ 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 ,(q)ru pb 4iysseparation of 5.0 cm. If the potential difference between the b(ys)u 4p irq,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 n0qqw0jcs a,e v: 4zyxo0 4 f8mhno3c)the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric consy0 )mcewq4o n 30h 4fn:qzcox,aj08vstant = 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 mm,,+3wku 2*wywgt+ adof4 rmf F capacitor. How much energy is stored in thefk*wwa 4y muwdf ,t 3o2,gr+m+ 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 is the energy stored int8)6tdrdhh yi 9.d vm6 the capac. d6rt8 d) 9hhi6dvmytitor?

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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 cx61 *falunu m*apacitor when it is connected to a 12.0-V battery. How much work was done 6nul1 f**mx uain 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 g3 jhm*q: pygw5;c/djit 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 platen0k11i1jf6j o04sghn, dmsv n5o, syds 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 plv w uc2qt j:1mj)co3 /sn95cw*fqxh2r65ahhiates 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 pla(+lqn ac)feo1.(thg t tes 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 plated3/ p)e*ww +d-kpfd tq 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 wik6 ff2 z; smmo/v*ye rxfs6.47a/hggpth 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 t x f7m0x9it3e 6e(ddcwikf,0so 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 the capacitor after the slab is ii6xw9ek,cf stefi0ddx7 ( m 30nserted?

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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 fully chargehwx.) 2z9wav kd. The battery is removed and a slab of dielectric that completely fills the spkz9 2xa.ww )hvace 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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