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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 wj0*m . kvmr9pr e1h6onot 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 coulomb4 ogxl4ldl*jjjue(; 0qiny7( 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 i7/t gpavh a 5 o+rlzma8(hua4)y52ydobjects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which objeca5y hy24h ga7z dovrp/ ima+t(l8u)a 5t 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 o-z.;wk9q1,unu uh7ec7e qdfj f 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 directne;:(sdu-nj4 mh6c6mhy g p)aion 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 ply-i* 7a(uklncl( n, coaced on a hollow 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 accelerated from rest to a speed v by a 500-7w8dcwrgeg ass03 j9 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ba8c -gewsgd7asrj w 309ll 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 ilj 23 hf(z-nfr xg(wg: m/cba1s 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 aq p,oqb. -gz(dl)w,lw1ca v*jn equipotential surfacw c(av ,qp.l odw)-z*,1bgjql e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must jf 9kd/f(wri o3a 1g,xv6kdm)fo5jxje3 ( q;a 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 carryingo fbb9 )jzl)uu tk+c70 a charge equal to that on the electron as a result of )+ oflzb 70bjuc9u)ktmoving 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 isn*kl z u*w+lk5 a unit 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 too wm8puc. 9 gulfi.gf81y3s8 k

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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 posit:zs7 cvgvw, 6yive point charge is 100 V. What is the absolute potential 4.0 m away from the same point c6zwv, ygc 7vs:harge?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentiu; l)c9x cugz;al at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point chz ;u9c)gc xlu;arge?

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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 exh5q-hrd hev; 9act 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 potential at the square's center when each of the other c9h r;d5hheq-v orners 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 :9na4m zddtdx* 2gt8c6a -yuw 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential t c6d*d-atdnmwg:y9a2 4 zxu 8at 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 tis:,oyl, ;epfuk , ss1wi2/, shy8w dewo 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 voltn6j uyvu/ir*m) g4,ci 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 capacitorltb* dx19.l mqs are identical in every respect except that one has twice the plate area of the othe m dqt9xl*bl1.r. If the smaller 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 capudjg * pw:me: ql-)nqm 6g+vk,;mu l:qacitor has a capacitance of C. If the area of the plates is doubled and the distance between the pla-ulvw: g*m:ql6 ;)dug kepj :qqn,m+mtes 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 and thjhb chh.* p *frxw3-61b adce)en is removed. The plates are immediachf -)c 3ex1dwjh ab*b6r* .phtely 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 betw ir,kw + g-h*m,r-omoieen the plates of a given capacitor is weakened, the capacitance-w g hmr roik*i,-om+, 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 2uvm5alf*m6w 8cp 7 fgare maintained with constant voltage by a battery as they areg5uf827l ap c 6vfmm*w 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 capacitofjpp +,.n3edrr are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field 3.npd +e rfj,pduring 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 bet mcn 7rx5 ez.qd2fq6+rween the plates of a caparc qdqfm6x5n .27ezr+ citor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such2d1pzb)vf kh4 as paper is placed between the plates of a capacitor. What happens to the capaczk4h 2)bd1 fvpitance?

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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 a(h n6qa e0,mdfs paper is placed between the plates of a capacitor holding a fi h end06q(,mafxed 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 to0)x k(nb gmf5t a battery and becomes fully charged. The capacitor is then dis)0(fx ktn5 mbgconnected, and 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 constanw b)g+:og( yijt charge causes the energy stored in that cbgjo (:gy +wi)apacitor 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 stored ink.wd(7lwqk )w that capacitor tok)(lw k d7ww.q

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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 ojqs )-dvo:)rfrom point A to point B. What is the potential difference between pointsdo j q-ov)sr:) 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 electret.la a8 8a4md-5xqkkon from point A, where the potential is -50 V, to point B, where th4xek l md q8aa5.k-at8e 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 differ(tw ekkvt942 mence of 500 V. What is t9kt4e2( vkwm 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 through an electr po51dj(k id ggubvwn;+,p; n n9r)tk0ic potential difference of 500 V. What is the s5(gwpdpiro;)n+u t njng0v kk ,1b9d ;peed 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 differengw+.egnk+7 3gxyo- da 2z9knc ce of 1200 V. What speed does idy-gng3 g k 2kx7o9+zwn c+.aet 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 l5o+hkf5x sf*1:lsfmeudk+ 2 V do 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 a potential difference of 500 V.y v/ gysy2..u 2hon5uc What is the velocity of the electron afterward?ou2u yy / .25ng.hsyvc

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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( kydbu-; ql0f. The object is accelerated from rest through a potential difference, and afterward the ballq0;-fdu( ylkb 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 electj qv z k-(1ica:yokc0+rical potential difference between two parallel metal plates separated bykaq( :c k0-1v i+zojcy 1.0 mm. What 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 cehql ,:/mknjr 7 5y:x9tbk x;V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, 7 bhxnkyx /q,:;:rce9tj 5 mklwhat 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 h: i,c nm fe+uet568*mc5vnc ,+c pnnnfield of 50 N/C directed toward the east. If the voltage measured relative to grouf cnc,nc, tiep ev5 nm:8hu 5+m*cn6n+nd at a given point 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 electriw8 4zh; y7cjc6*xqudz c field of magnitude 3.0 V/m. What is the change in kinetic energy zc xhu7*z6y;8q4wcdj 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 battery. Anbzj)ag ggmc 2bt 3t7phx0 o90+ 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 positive plate, what is the potential diffpm027+jzg3bt c0boa) hx9 tgg erence 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 battem(d-rgx(ge2 nks4 m;c ry. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.em xdc4r((;gs2g-nm k050 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, sep p.j+mdnuu;)f arated 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. p)nfud. jm ;u+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 field of 50 N/C directed toward the e*+y7t 4 t hdtc-bkbehx7wz h72ast. If the voltage measured relative to ground at a given point in the 4hh+7*tt hcekt-bx7z7 2ybw dfield 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 50 N/C directed dvr:n:awmu -/bls *+ j.co im4agp57otoward 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.sbc. uop:l4m r7v/i5ao :amg+*n -dwj0 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 aij;hc9 ae8u0,kga8p/u/e 9fcr 9 ozqb potential difference of 12 V, it will acquire a kinetic energy (in9jcq 8,gb9aoez uac8 ef /9iuk/rph0 ; 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 distance of kcy9z ce,* 3uc$5.0 \times 10^{-10} \; m$ 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 sti ip( 3,r lvjyhcu-hi18ck. Find the electrical potent jhp8lr vcu3i-h1y(,iial for the 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 at (3.0 m, 0).+x fy7*c6gmfj If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.76*c+yffx j mg0 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). fq4rqd:4 g 8dl If the potential is taked84 qf4l:rdq gn 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) andc.l,osvrfl7 + a -2.0-nC charge is 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, 4.0 m) ,s 7l+.rvolcf?

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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 sidea5q8u/sro fyal ./d1o s a and b. What is the potential at the center/orl5 s.ao/ a8qdyf u1 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 +4.0 mC are placed in t na t,rewk f-km6q4,1klam /f)wo diagonally opposite corners. In the other twaaem,km/qft-k6 )fr l, k 1n4wo 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 +2e, massk 6szpvx.s h ,4rg0r9mcyev/ d6w .*zx $6.64 \times 10^{-27} \; kg$) 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:v0fyfgcb 3l jwr+7-k p2+tyfo1 fej0, at the corners of an equilateral trif w: +veg07-t+rj k3f1jc2byof 0lyfpangle 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 cw,kl m6ofrxqv: kmi)3w15sf6e :yc g,apacitor when it is charged to 100 V,kecio 1: :,x )6fw lvfygmm 6rk5q3sw?

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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 area ij2-gtzmbmi ouo 714q9n6it 4c(p2f mf:p8 fy$0.50 \; m^{2}$ 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, an3ba/ jkb )5+i8e ;b bewufuhj2d the plates are separated by 0.050 mm. If the capacitance is bweje3 j5 bf;hia/ u8k2b bu+)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 u:j ;loh5w s2nw1shma;8;qxb 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 separation of 5.0 cm. If th/f30g cghj.jp9g*su ee potential difference between the plates is 2000 V, with j /g3j.9gc hfp*egus0the 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 battemd o 5ddae-pr;qi: o8)ry. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (di-rdedm5i o) ;8o:qdpaelectric 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 much ener9y2g ;0wba zz)bqlq: vgy is stored in the capacitorzzb9;q b2wa)lv :qy0g?

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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 in the capax*56im zoh6 a s.vvqe1 7kj7duciv6d1ueki*amv 7x 5qos6hj 7z.tor?

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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 whe27vc7igiy q)45kxfhvsrsk t a50 7 uv1n it is connected to a 0s kfk5 ts ivaghir2v 471)v 7qc57uyx12.0-V battery. How much 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 charged.wvn+ w5 ejx-0xti3xn 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 consistsdrjdky et06 jn:k p9.+ 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 capaxbf ovn*ank9 q 9;80fccitor 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 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 71ev:twg qkax;t(a1u9i+jur d 1 g5pa 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 construcem./*4 vzi)x.jrhsqszi v 26dted 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 constru8)edlsu adz5ietd1 /wg: e 6srw;*0xucted 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 an:v pq8qbx, y18p oslzg7s7;ve d becomes fully charged. The battery is removed and a slab of dielectric that completel1bp;vvz8x es7s lygo8:pq, q 7y 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 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 becomes ful,t.yndxgf+j0 l1 h a4bly charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric h0t+xlda f. jg1ynb4,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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