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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 xc7qyh-zx y:)i1 l, khvector?

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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 b dqnfb81 +7vsnjdjz dgv- :,ux: s +yegb+((cis a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminm :,d/diyz/69sux+ bs (nvhfcum objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is ground:i/6cs dv,9zb (humx s+ /ynfded. 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 th m8av 0*cup8 zng)v9 m.jmpmw3e 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 ae .yxq4zw3b -gsl+2jd 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 hollow conductingl3-/ ewhz fum+ ng4 ueyg2n(/y 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 / 7ns l18v2rbhtyg.vg; ( y l+lbmae2hv by a 500 V potential difference. If the potential differe/ +l(;7mbea v8ty.rlhg hlgb12nv2 y snce is changed to 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 at the 1uwk( 2on)f6 m wnwt3osame 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 along arec;q gcwg 8((n equipotential surfacwgq 8c(c;reg(e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfac18uqg19rd:l x:m4x:c +7-fhqa ela s(yhlywt e 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 char -hjou6g +;uidytxwkg38 3, ib)cm9psge equal to that on the electron as a result of moving through ati83-,bc )9hkm+y3j6 opu du iswg;x g 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 ofrkt7 ecm3 a :uom (zv pdf.:r3mz27-nj

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correslixj:j .ri14(*dvas bkx 6;svponds 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 distan vcq4g l9oyj):) 0prywce of 2.0 m from a positive point charge is 100 Vgyvlw :qrjc4))po 9y0. 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 disb217wuc ,y4t ph4 qfoatance of 2.0 m from a negative point charge is -100 V. What is the absolute pot12,4p7ob4at qcf uyw hential 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 exact center nq1r ;cz v:*ty( e pb*n/t:znnof a square is 3.0 V when a charge of +Q is located at one of the square's corners.en b: (1r qz*n/*nz:vn ct;tpy 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 whe ldr 6:vl3ng-dn a charge of +Q is located at one of the square's corners. What is the absolute potent3gd6 -:lvndl rial 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 charges p-c q eztz10q.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 vg0:c2m )3tafsae l)fq r z3b+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 capacitors are identical in every respifoaob(5qc e- ,i( y4fowx1 8rzg w.pne-02 wdect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the ypfwi z, iweoe.q8c( 2ofn(d 5gxra-b-w14o 0 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 capacitxeuqm, aq5+ 5/qza1 edor has a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, w5+e/,uqaxqad qze1 m5hat 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 then is removed. 6tvpj33v-(/ns 2wx7k4,fta zjzcg uz The plates are immediately pulled apart. (With the battery disconnected, the amount of charge tg c-2vv kxts3j4jw 6anf ,z3zupz/(7on 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 ts ska c5a1br+:he plates of a given capacitor is weakened, the capacitance of that 5rass bka: +c1capacitor

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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 consb6dilh w))vrzrc(/ (rtant voltage by a battery as they are pulled apar/lbirvz)w(r) 6( crdh t. 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 maintained with l; 9qbaz0j3vnconstant voltage by a battery as they are pulled apart. What happens to thl 93bqzj0n ;vae 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 osi(xi , rb3z-a dielectric material between the plates of a capacis-ob(x i 3i,rztor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material su:ld -3 a2duo3mgtkd8ach as paper is placed between the plates of a capacitor. Whatald3gdak2m8 -3dout : 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 a ;67vb/l6q(bvcxpj0e wx 0 luas paper is placed between the plates of a capacitor holding a fixed charge. What happens to the elect0b eju ( x0;qvlw /plcxb7v6a6ric 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 connectrrt 8:3xp)a.obf,i kyed to 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 charge lea.a:o)x yir t,p8fk3 brks 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 capacitt:2tqb( fiof asy7)3oor holding a constant charge causes the energ yqat73t:b ()f 2ofsioy 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 the energy stored in that 4qkddd9+7y :gc*cndw capacitor tccdg+ 7dwqn9d*4y: kdo

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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 pzi flhm(+ 3p7foint A to point B. What is h f7 (zl3fpi+mthe potential difference 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 electroneml oqem0qt *87 im;63u nk44hy*fsom from point A, where the potential is -50 V, t4t elf43; 7oym umqm*e*h i6qokmsn 80o 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 acceler)mgv..g 9bz. erqgv7 nated through an electric potential difference of 500 V. What is the kinetic ene)qgb.rv79. ge.mv zngrgy 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 acce;o:7o*nlo(eoe w4 s j*qkcv b8lerated through an electric potential difference : lce7n8obw;k(*o* oqj sevo4of 500 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 poten1ps:hsm gh6oa; y ne+-tial difference of 1200 V. What speed does a+;6hn s:- hgyeopm1 sit 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 in moft6(p6rq/jx qving $8.5 \times 10^{18} \; electrons$?

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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. fjijjdh 5+ gox16l5x. What is thexji5hd6jxj +l1 og.f5 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 go1pn;5 :kqbsmC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the gno:sk51p ;bq 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 c-:-mlk2dxtwao n c63b:x m,ylsuj+0 difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the platya6::mt-unxc l j dbl23xom 0-k,w+cses?

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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 aoq2 j38vg a33lj;(t fs:ka dkV/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 dgavq3sol3f k2ak taj3;(: 8jm?

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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 i /,h3fimvrv;toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west of thii, fh3 m/;vrvat 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 directi5fs pquch um+*w(-)m con of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the proton?u5 *chs fcuwq+-mp)( m

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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 u1(h3-3gn inoeu lqe1 by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.1 -il 1eogehn3u3qn(1 u0 m from the 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, separated by 0.20 m, are connected to a 12j kg(on- ,li-sz. )ajc-V battery. An electron released from rest at a location 0.10 m from the negative plokjji -(lz,na)g .s-cate. 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 byk k37og;cwebw-k n *7t 0.20 m, are connected to a 12-V battery. An electron releasedk;3wogw7n t-ck7ek *b 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 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 el9p, ;lu oiuy2fectric field of 50 N/C directed toward the east. If the voltage iu, pyo9fl 2u;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 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 emzkz80*3ioz5iec3 aku/ ts0. yjyz-plectric field of 50 N/C directed toward the east. If the voltage measuresz *zymyeki3 o aiujzk03-50pz. 8t c/d 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 V, it w-,f9;tuumyi g /zyjtes 23g (dill acquire a kinetic /iu3-e9,u( yydgfsz m2 tg;tjenergy (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 distance :vpo/:ppgiz . 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. +ahk 6(gnmk gp7k8 1u uv*k-ji Find the electrical potential for the center of the meter s 68gk1 (+kghnka7vukji-*p mutick.

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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 chrxb: -r5ztsx srx4v7 ;arge is at (3.0 m, 0). If the potential is taken to be z: v -5rzr4xs7sx;trx bero 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 is at (21 zg f6zofhrv2a*7y u3.0 m, 0). If the potential is taken to be zero at infinity, what is the eoar 2 uzgh2*y6zfvf17 lectric 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 (3.0 m, 0). qbpol8 /acg4cnmeve4b ) 3xiy;tpo9b /, k);j If the potential is taken to be zero at infinity, what is the work required tbjbi9el/8 ;/g4bk t; ) cypq3)mac4 enpov,oxo 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 pl8 nli7jd4ntu z2rog nd:)d2(xuyb - 8uaced at the corners of a rectangle of sides a and b. What isil-y( u7 d unbrz)dn 84d2tn82u xoj:g 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 +4.0 mC are placedo 8warm)goz rk:8r1 )1ha9km c in two diagonally opposite corner 9aor:cworm)h 1a )zgkm8k8r1s. In 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 +2e,5 pqlcq *a;f 3sc9zy.r 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 pl8 3ef;usz rcdb*z vk27ace three charges, each of 2.0 mC, at the corners of an equilaterasekuf87*3r c dzbv;z2l 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 llggjjw spr 6(ou,tl(.+v)m( the plates of a 2.0-mF capacitor when it is charged to 100 s o6 ,pl).mu ggl(j(jv+rt( lwV?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capaci+tlij ;hwde19tor 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, 2: tu-lfsc jq,and the plates are separated by 0.050 mm. If the capacitance isj ,fsl cq:2t-u 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 ofjxy n*r:ge8em3a5 1un 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 wi:67t4iktjw has a plate separation 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 betwitj6 7wt kw4i:een 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 battercznavg 1wlj )- o/o:).;oifqky 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- kognvo/ ; ).c1awi )q:lozfj 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 in 12ry+a zg6ggx the capacitor?gz12 +r agyx6g

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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 nrbqu2o5q(1m id6 f9m s0q xv30qja0tcapacitor. What is the energy stored in the capaciqfv9q0qi2 on30md(brju 0xm56s 1q attor?

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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 p/ 5ouq7:h3ekpsfk 4 kflates of a capacitor when it is connected to a 12.0-V battery. How much work waf5 kkfuo /3pk7se4qh: s 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 cho:2g::nvk pj.kh/gslk u -ds;arged 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 consists of plates of area ihe plwo n mt 4g1jd.,y- yq73ol8jz+-$1.5 \times 10^{-4} \; m^{2}$ 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 pgk de8z ::tqmzn* 2 )kkx3vt4wlates 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 capacispr/8:zld: (c,*yyv bhh+b xq tor 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 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 c 7z9lyy*r3psf)ocq6ysdm (s , onstructed 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 capacdj0bs,xx :slovw5a:l +.kd3qitor 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 connectednigm r*xg, ndst1;2l4blj4u: to a 50-V battery and becomes fully charged. The battery im n lt,g xrij;d4 4gs*2nbl1u:s 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 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 connecte /575 j gmbhxu-y9ecxojz9 goil+ f8+xd 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 is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's plates aft7h fgx/byjxu+ -g+xi95mz5jec o ol 89er the slab is inserted?

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