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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: 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 vectorgic sa+pkbgo.44lp( 7?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombtf-smaw8(ln 6i6fqdmn( w2, n jcngp5:h 0e1b 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 insulated from their surroundings. zdhq/k /0yw-b0i;2lb j vx 3y3c/um jhObject A has a net charge of excess electrons. Object B is grounded. Which object is at a 0x m-3 ;kzlvb w hc0ih2//j/ bqujdy3yhigher 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 dirm5vyu9z3nhpuk2 z 6 /pection 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 direction opposite to the electr 8upo+n64t1xnhp u1f4,n s gfnic 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 v.a3og e0,u e16pknoaconducting 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 db)an w z*g6 c6j2c3imk4pu 4fa speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will3wz6k2ucd4jbn4a6g) *imcpf 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 revc*3 eh7p /ei4u,*jw ox c0ofkbm*ry0ferred 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 suzhm mtoaxlnz5n.7/ a 3.9s)jerface.oh / j zz5.7 m.x3sln)namet9a

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface e c v7ijqyfxu1+log96w6m ( -pmust 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 * puk-uimlm+x+gq5p+ /jxfm/v w)dq;0eo-b rcharge equal to that on the electron as a result of moving through a potential difference of onexd-mkp/mj u0*fp) ui qq5;g+o + lex-+rmv/wb 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/7qnf o vu pq2 m+*6e/vtm5ohof

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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 6m92-su-9hhq fsvm,j etd ef+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 charge , ,vdr bm4m;dwis 100 V. What is the absolute pote4rbmdv ,m w,;dntial 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 diwqr0e14,j*xg 3 caqufstance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m rac x1 3ufqje*g,wq4 0away 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 atk*0qubf3f-lf( ;w tqt the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's cq -uft fft(b l3*k;0qworners. 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 potentia)gr(atsofw 9qq+ce2v )z9p1rl at the center of a square is 3.0 V when a charge of +Q is located at one of t +v r)te pqr9sc12qwo)fg9(zahe square's corners. What 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 twob1 jq ro4ahz-( 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 r3bu0 vj 3hmx7*cfi*x1u 4lzfis 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 excev eyh7l*9qsz9+na 5fept that one has twice the plate area of the other. If the smaller capacitor has capacitq+ zavy*5nhe9f s97 elance 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+kmjkwnh2.kp t53+ar/pu, k l C. If the area of the plates is doubled and the distance betweenuh kkkwkrm/.lj 5 +p2a,n+pt3 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 parallel-plat6fo,q (9b7e3uzffff b: t;hdue capacitor fully and then is removed. The plates are immeobbueff d9(h,q6ff f3u:;t 7zdiately 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 oadp sam( .-va:vn . uc+v2.s9hkmahw 1f a given capacitor is weakened, the capacitance of that a hvnsapds .v:92w.k-amha (1.u vc+mcapacitor

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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 capaci3 ,)j bg6rg9bmms:bz 3 1 tk)mn3obvnkf4;v oqtor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates mv,r t:ob1gonb3 j6zgfmk)k93b ) 4vb nms 3qm;ust

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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 cvm51 d7c5a *qt +qrekcapacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this processvqct1crq7d55 +m eak*?

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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 between the platesx;dl(xvi a 3:e8vcyl35x ) mnn3 x2zrz of a capacitor x33vc; yxm)ixrzl nz 8e x:3l2d5(van.
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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 eyw;:07ibposf7ogm4 the plates of a capacitor. What happens to th74 ;o0igmfyw 7speob:e 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 jm;5tn1z, hjb *ue cxdkl+5y, the plates of a capacitor holm;cej ldb kn ,* +ytj155x,uhzding a fixed 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 chargedm ,zb .cxpe/4k. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in this capacitx 4be/c.,km zpor 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 char;14lu blqy qg5ge causes the energy sqlgq15lbu y4 ;tored 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 the energy slatyfc 8e(4hft yaw -:ba7:s0tored in that capacitohfta(4al sc8 7ybw:-af: y0etr 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 6ec l 0nfcp/p-move 10 C of charge from point A to point B. What is the potential differene- pf/ cc6lpn0ce 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 1iiv vgfrq9r ,wq0os.;) x6tu moving an electron from point A, where the potential is -50 V, to point B, where the potential is +50 V, ) ,0t q 6vs9i.1 wfr;ougirvxqis

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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 accelerax57 , ipns9qjsel9g qw(i+.bjted through an electric potential difference of 500 V. What i9,j. ns7(ie gpjq+w 5 ibq9sxls 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 atuvyxqg+/ f x /.vlpj3jxaiu+x ;v5k6/ rest, is accelerated through an electric potential difference of v l+/3.x/xky aiq5uv/ ;vjg 6p+ujxf x500 V. What is the 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 potential di: e90b42 chxgpe :hljbfference of 1200 V. What speed do0blec :hgbj p94eh: x2es 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 a kqx5ef/36zkx .u0mzz -9sat 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 accelerz( .kwx-hbl )wated through a potential difference of 500 V. What is the velocity of the electron afterb (h-lkwzw x.)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 20 f49 2-dxuibtm mC. The object is accelerated from rest through a potential d 92ftim u-dx4bifference, 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 sxicnno8p*l -*-h . v* 0vvfxgdifference between two parallel metal plates separated by 1.0 mm. Wh.xv*n hcn -glx0sp8iof- v **vat 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 magnitude of 500 V/m, is directed c)+ fdn ts 9z6ne1hyro:14ypnparallel to the +yns91zontf ed)1p c6r+hyn :4x axis. 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 electricnfa(6h oy1pur s;c74r field 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 at a s6yr o c(hnp4 7faru1;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 ra 3d- lqc* 9y-5t pyejamr58wfield of magnitude 3.0 V/m. What is the change in kinetic energy of the proton?wjrtmlydr3-c5 5 pa-e8y* aq9

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separatec.-+fybpk nkg* gjwb-ph,y ,,c(f3mtb jj;l2d by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the nega ,kcpbyj,*tc;n 3klgj-j(bh m2 wfp y+bg,.-f tive 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, scyagoh(s- mj-4.7 hbd da5 h+xa3y.ikeparated by 0.20 m, are connected to a 12-V battery. An elec +j 4 sg5hmi3-dh aoxayady(kb.7c-.htron 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, 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 tgwm./1s w--cgbjmq l8lq(i 1connected 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, what is the speed of wl. l(8- cjbtgqw1 m-m1sg/iqthe 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 directlsmbvbal 5 /bf 59/cd- 5)ufeged toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage abv f5c ue /- /lfgb5l)9bdms5at 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 50mch qvivve l- (w3cxf;xuk.j+z: 7 n.4 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field4xuf( vclvq .k7enm;x+.3 wj:chi vz- 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 potee *u89or e f;ajz-ln ce:w6sxwg)/r/ bntial difference of 12 V, it will acquire a kinetic enex-) lejbcw6:eg / *sforz /uaw er9n8;rgy (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 a distanccz0l9dnnj5jocpo tz,03o4u8 e 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 end5zhs m mm ,s.c*c(im)is of a meter stick. Find the electrical potential for the center of the meter stic m*5(smi.,zcmi smh)ck.

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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 charge8nba;;be1e7l ho*e ck is at (3.0 m, 0). If the potential is taken to be zerob1no*;he ab8ke7 ecl; 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) and a -2.0-nC charge is5aza:d jieo )9u,qkx9,da ihk:d) 0 ur at (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 poiuad:: k9dz 9jkxi0,r)i h,5 o aa)qdeunt (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 (3.0 m, 0). If the pop 2pgf1 ).la./v+gjaf a0gbrntential is taken to be zero at 2pflgj bgpn/ vaa0g.r 1fa)+.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 c ,c7 nb fi11;8wonufciorners 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 cm?fc;1fo, w 8nc1niibu7

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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 +4.08w+nb mu1zby a.3f9p f mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. 1f z +a93.ubwb8nfy mpWhat 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, mass 1 pzy4wx p3a22xntmv8$6.64 \times 10^{-27} \; kg$) 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 ofl(.3sv nvn:a2d nixzkx e)-)c 2.0 mC, at the corneckiv 2):.d z)-nev(xan3lxns rs 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 chargg3qa9 upi-,8la s+bf zed to 100 + iqgsb9z,3alpfu8 - aV?

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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 platesgb3;7 gnsi:fn1 w+f ph 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 platemnf//qqwhg,c -1daa 1i 0te4g7 m2okjs are separated by 0.050 mm. If the capacitance is 17.qa-wdn1km4h/ cg72/ef,mt 0 j gia1qo3 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 platesb fg 1qj9fq29o9gkzv f*cl)6m 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 pjcc jr)3mwboyz(s*1. late separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top w1o*js.cy cb j )(mz3rplate 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 tp vqq9m yy.-+zi0)su dhe battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge floi-.+0v yqp )myd 9uzsqws 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 stored ins * jk z5nbjx-2s-ax7x the ck5zj*s axn-sx 72 bxj-apacitor?

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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)av1flwxwkjm0.jpuu7/ q 3.m in the capacu0jlpaq3 wm / .k vjf.7)1wxmuitor?

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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 conn*ddrfl+cpa 5z1i rd 3zlej72; ected to a 12.0-V battery. How much work was doneec1* il;z7dzr +fdj5 dal pr32 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 charged s+iwa ;osfsbpo2pk2m d;71 r t+o 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 of area bfuk z88bp2:zj(; kdnsmbk 0:osm 68t $1.5 \times 10^{-4} \; m^{2}$ 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 pxy(jw,2- )kdiu . cy. yom2lrglates 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 o:g0; pv7td,5nd6hc) aor av3re nxz7if 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 constructed with plauqete au/6se; 5b4 py,te 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 witmp1z/p 76r upn.tc7 vih 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 bec .gqz*no;acn cl;( u b968ncygomes 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 g9qc*gzuon8an 6c (y.ncl;;b 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 (77t,dndd)1g rrbved 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 ine (r)d vdddrt1b, 77gs 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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