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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 nobw n xyi:x:+p1t 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 coulomb b1ge:2mo; kj*ej;dtx 0g3b wzdm:8 pris 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 sure-b3qa4 fj:y0q cea; hroundings. Object A has a net charge of excess electrons. Object B isea 3qa-cfh; b0 ejqy4: 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 in the direx6ttui3xu0 1 u)f mnhyg:3ht/a0t7tzction 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 ny 1cymu4o9pwj8h+ 3ua direction 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 holxim*ab.q im3 ;low 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 acce3uoor4qg0uuw0lh7a 6lerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed taruouuol7h06 w043qg o 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 a s+nuo6qvjo vtyx:1k.( q47v nt 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 alo28a-x.7sycl; c2vj p9vrg2yu7jrsp b ng an equipotential surface.7; rc2 p8guly-r pj2xv.s9c j7bvas 2y

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfac7mxalk-v7t v2e 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 chams,).pn7tjl lco 1tw, rge equal to that on the electron as a result of moving through a potential differe.c71sn m,o l)p, twjtlnce 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 3 /afq xyyn0+:hetl e6unit 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 corres8w .v e,rmvn2i 3qkha+ponds 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 c j r6xk(*l1spzhlezkyq; 29l9 harge is 109*xj9l1l;lpy(rk h e2s6zkqz0 V. What is the 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 ocifz,2izcqw: xjx :( qgw*(2.0 m from a negative point charge is -100 V. What is the abso2 qx ,i2:(qzz oxjc:iw*gf(c wlute 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 at the exact0h0/ lcq5z z anwlqs:8a1 m,pa 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 poa lz05wala,18nqs/h p zmc 0:qtential 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 cen 831uu(s finfawtx4how*h l5 9ter of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What ia wut453xflhhunof 89*s1(w 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 twyc u k:rej*4a7g9 plk1o 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 is al,vff8 k9tjijpp*2 2 f

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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 arebu5lqmqi;c h5 p 9vz;wy2/pl ze 9n06t identical 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 capa chq l9;02l6 u;tqp9zi5 /eybpvz5wnm citance

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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 n86;g2hu8sj 5e.xpuaw7 1vyjtoyy q+ C. If the area of the plates is doubled and the 8axugy .ept816+voj;jsyq 2yh5 wun7distance 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 parallf23qojim5 padj ,4yy 1el-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge o 2iy5,41fd om3pjyjqan 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 is )a2k; g7oc/d-kjs* 6x4 iub2glwtyjyweakened, the capacitance of x)g42aubg6c d 7 k2olkwt*-y /yjji;sthat 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 mainn s93py.ux2m+q hk6s ptained with constant voltage by a battery as they are pulled apart. During this process, txh3qsp pu 9n+kmy2s6. he 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 0 iob cxgqle66 wh0vzmzx3*nec7q+/bh4q4x, constant voltage by a batteryh0/70vliqez*x 6h6 b+ qmwg,3b4xq ecxzn 4oc 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 xvi(.jp7 gf 8xfor adding a dielectric material between the plates of a capacitor.j ( xvf.xp8gi7
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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 plac tz6:5y3 jqbc2ibu,e;nb7t od ed between the plates of a capacitor. What happens to the capacitan2ybbtcbo37 dj5;:ti ,euq6znce?

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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 2z vtm o.s 8626recyvr: +tykjvd9x8 dpaper is placed between the plates of a capacitor holding a fixed charge. What happens to the electrx vj2td cmy9 2rvyk . rt6+6:s88oedvzic 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 ba g-o*s--srwvjttery and becomes fully charged. The capacitor is then disconnected, anvgrs-- w-osj*d the separation between the 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 thflqec8wj5d-3 o 8ko+q qu(1xne energy stored in that capacxl-83dq8en(q jukf wc oq o1+5itor 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 ayfq nc3c zy.i;n0 i5;rbv sl,cj22h.lcross a given capacitor causes the energy stored in that capacitocyc .ii03.nn;ll;y2qbjvf rshc , 2z5r 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 charnwo(ywz9uuv ph 7dc1x h n3:(3ge from point A to point B. What is the potential differencewu(un v13 h:z7(x9pc nyowh3 d 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 frstr p+pqh);clj9;i 8 ywza; (gzo5pg( om point A, where the potential is -50y(sg()z ;hc;ri98 t jz5popw+gaq;lp V, to 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 potential dif./ ;jnup5rz,e 4zt+,bw jiuyf ferenz.y jnwrf e4+bu5/p,z;jt ui ,ce of 500 V. What is the kinetic 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 tbmod9rgj-ranj r 7:;qo 2x9/fhrough an electric potential difference of 500 V. What is the speed r: r2/mnjq99fob- jr xa7 d;ogof 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 ()nizpo qm,; c8raityambj,3a/30s t falls through a potential difference of 1200 V. What speed does itat,sy0m;8qb iza( m,noc)t3i ap/j r3 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 cdi7a.e6 o yk.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 aiyw 9g lbe5yqa;2-tp8 potential difference of 500 V. What is the velocityyg-al2yq8p 9t ebw;5i 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. o ixec/j3;xu4 The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitudeo4;xic uj e3x/ 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 differ),-hsef)oy oa ence between two parallel metal plates separated by 1.0 mm. What is the electric field between the platafso,h ) -o)eyes?

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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 oiukfn(cvct 6 f +v3+3cgxvu88 f 500 V/m, is directed parallel to the +x axis. If tf36t+vxi(vk3ug 8cc +vfc un8 he 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 hy+0.ae w/2bzwu hon+:e ogipfq3h40field of 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 . un:o q0gwwobey02/p4hzh e3++fa h iat 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 qfigec f3hsq27/v,z. field of magnitude 3.0 V/m. What sqvf/7 g i,2 cq.efzh3is 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, arlwmi4oei: (4g e connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arr4iw4( eiml:go ives 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, separated by 0.20 m, are connected to a 12-V battery.aq :+sdy. iloh+ k3uv1-52a pumaioj) An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives lh) 23v y+5qujau isa op.ao-mk1+i :dat 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, separatem2ot al;yfvwwa4 d .p92y b-v2d 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, whattowy9 dwm-2.fpv;4aa vb22 ly 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 easghkd+a0 0l : q,m-jerit. If the voltage measured relative to ground at a given point in the field is 80 V, what is the vo h0qm:-l0,kd e gj+iraltage 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 east. If the +dx+ v3gkw 3zfm,b6u 9s8ssewvoltag9,wdz8g+bfu3msk63s v+ xw see 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 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 37fibev(pf( e V, it will acquire a kinetic energy (in the absence of frictio(3ffb 7piv e(en) 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 potentiaz:vg -(,4dv7h6 dce vuvtuc6 sl at 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 suq5i , -qjgr 1clu.rnene/ +;rtick. Find the electrical potential for the center o,qe+r1 igc .-lqu5jue/r rnn; f 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, 0ie( p 39f5vdzraizio+ .ki97 :lh hg;q) and a -2.0-nC charge is at (3.0 m, 0). If the potential is tera9f zk vl i g+;iz:9hodq.3ii p7(5haken to 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.xn ;yrx.wpu ef7r8j.) and a -2.0-nC charge is at (3.0 m, 0). If the potential isxjpf.x.8w7 nrr y.;eu taken to 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 at (3..cwe1/s.u coi0 m, 0). If the potential is taken to be zero at infinity, what is the work req ou1.c wsi.ec/uired 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 fbe- *7vhrt u8the corners of a rectangle of sidesbe 78fr*- vhut 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 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 bj3f/b39hzc-d+j8;wphrts k of +4.0 mC are placed in two diagonally opposite corners. Inhbd8bsk pw -3+ tr9c3 jhj/;fz 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 +z1wbj79phcdbd:. ci32e, 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 pl,)p4 sbi( +,xbe:efrzlh,y fd ace three charges, each of 2.0 mC, at the cornerlsrhp:zy,,+ bef,4b dexif() s of an equilateral 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 chargedb wt0(3ww; 1eodr5fni to 100 Vb01roit 3wd;f5(we nw?

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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 ygtj4t . 7g-9tw(vh*t7vnpb w 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 the plates are seplzy (;,zaykv,g;lu+h)x lqs(arated by 0.050 mmx;;,a (,gq hkl)yzl+svz y (lu. 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 capacitor hc2c ih s/i8 vwpsb6 agl9vvj b.:n(:4oas 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 sepagph- yev bi-6gx( +alvn6csdc5 7g0 5lration 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 electric field b ylgs5v0v hd-(ci+75agpx6lec ng b-6etween 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 bakmri;9), i2 yo yzt3fhu/fq*u2e h ju1ttery 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 connected during the pf2orfju hm9 3*z2 uy)1i tkei/;, uyhqrocess?

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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 oej3.,zgr,rim5jb 8 sk;-ohzn :h5qscapacitor. How much energy is stored in the capacito55,nk z mz js: rh8esqbj3io g.o,r;-hr?

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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* qkd*k(t4q*ju:zx 0gxz1b pv the energy stored in the capaci1 v0ukk : 4dzxzjg b(*qp**xtqtor?

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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 connec)y0yom6,v d+6l yxcy0r rsve*ted to a 12.0-V battery. How much work was done in charging this capdsrcvv0x m6ye,* ro60)yyyl+acitor?

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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 it stores t11tcp: :5yg -gekzdc $2.0 \times 10^{-3} \; J$ 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 capac3pm bnuanyhi1k h(y+q w2z3h 5;r5 f5titor 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 consi b22 wm kshhr5g/y3m;bsts 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 5)tzpjy3u u.do w;(w qplates 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 constk6qvo z;(mx;;lc xy3zi4 0w ajructed 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 c s3.h*wyyyl j:9.hgw sonstructed 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 and9je;;y /vn/s . jourqg 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 ca ;gqr/j/neju 9;.osv ypacitor 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 becgsb v(+g m;:b-or 5wjcomes 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 ig m5c;bjrs+b w-ogv(:s the voltage across the capacitor's plates after the slab is inserted?

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