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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 vmg)kt b2pc*15 dz 9ac3jwn ba*ector?

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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 isi.b6-n5blte 258s thw1 mb7pm9dk pxm 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 objectc epdznu3 y6 uzu;81i)a z.4cts are insulated from their surroundings. Object A has a net charge of excess electrons. Objuz1.p)6ic8neuy;3zu4zca dt ect 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 in the direction of the electric fi77i ej: w .)f9 noqyu87wgztideld

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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 5.2ht y4rn.ohe ppwj6em)ap9in a 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 arecx:sqo+6l3+(obroe v jq ez3. placed 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 ayh87v5c4ew3fac gfqa .*mzu. ccelerated from rest to a speed v by a 500 V potential difference. If the potential difh 4z7my8.5u g cf.aewfcv 3q*aference 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 tj 0hmfa31-ry 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 along an eqiat93:e uc z2muipotential surfac 3 azu9:t2ecime.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface muz;.o d- ;nqhgjbsw 6/bst 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 y /:0jnpjqm / vc ;sar-j7p/jhdmb* ;ocarrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referred t-0j vs/r : j/ma;/np p jj7cqobd*mhy;o 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 ofoy 902.) fh esp.wh3ybxpo6kp

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corqlv jxfhl 61lv3z,(:h1dz7hv responds 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 positi9 exu 6f4os:rzve point charge is 100 V. W f4s ox9e:6zruhat 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 2.0 m from a negative point charge is 8uzi;wv 3 .wle-100 V. What is the absolute potential 4.0 m away from the same point i3lve u;z.8wwcharge?

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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 of a square is 3. v,zrt2(j etyats5y (/0 V when a charge of +Q is located at one of the squaree(j(tzs a/2v, 5 trtyy's corners. 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 wh/p a./,oy(wxa.g 1pr uptrl5 hen a charge of +Q is located at one of the square's cornerx w.urt(apoprpl/ ,/1y .a5g hs. 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 two charg vkns c; 7t.hrdff;0u2es 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 isufl +py6t9vp * 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 ptuq xm7 y0/jd4wl m8 c;ve1wi,)nh(z are 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 capacitanch4;xl(q0p)/ct 8 wen dz7myu1ivjw,me

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capp fs.kq: o*j(macitor has a capacitance of C. If the area of the plates is doubled and the distance between th: jmo.(k sp*qfe 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-plate capacitor tpz86siu.xs ezsao3 7dw00 e,7ngulf 3 uye4;fully and then is removed. The plates are immed 8pl0.3sefgixzun z 6usu3ywe7 s;7 oda4t0, eiately 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 of a given capacitor is weakened, t5k.s m 97bqvvghe capacitance of that capacitor mvb 5vs79.kgq

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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 coi/ q9f4 rfjsl:9nd g-y8m 7hqonstant voltage by a battiomqndr q9 4f/78:sl -fyhg 9jery as they are 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-pla1lo4zve qg 60ja9p h8qte capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to t p 0q1 lhq8ae4vjz6go9he 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 fogwlv ps0(c ozu2ja3 ,.2 :rq gwleo)k/r adding a dielectric material between the plates of a cap,0 :qv)gojskaco(2p e l2gu wz/3.rwlacitor.
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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 platejnj j*lt1 p;muu6 qg28s of a capacitor. What happens to thel6 g *j j8j21n;tmpuqu 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 the plates pchm/juh7h9 f 4yz m) x51mzq;of a capacitor holding a fixed charge. What p /j hhf4uc5 zym71);zhm9mqxhappens 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 batteryw u3xw :0nuqc-;*i5ti.p nde p and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The en qtdp:w px incn;uuwi.3e *-50ergy 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 the mx gj6 rk))cp9w:r5qbzykd- /energy stor p g9ck6mwk:x)q5r) db-j/ zryed 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 givw/blll1tm4 t2en capacitor causes the energy stored in that c/wltbl 41lm t2apacitor 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 charge from point A to point B. What i;jakk)rzdq 8 5cvsy 5zyr4z16s the potential difference besz k 5165yzq jdrkc)zvry84;atween 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 from point A, whe.i fjnmhj 73v;/ o2dxire the potential is -50 V, to point B, where the potential is +50 V, is ixmj3hfni;d.ojv7/2

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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 9v b pi)mfw(42rrk/ri an electric potential difference of 500 V. What is the kinetic enei(9birmp /r)v4r2 fwkrgy 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 electric potential dd07b:9 6 qzmdn*jyigqqx 5n (iifference 0ii njmyd9q x6bqnz5*d( :7q gof 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 potential difference of 1200 V. W:i9q ,p- qvgast,9nzg hat speed does it ac 9,g,qnzsqgv-i tap 9:quire?

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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 8xb, jjpvwt.(k; n ryd58 kcxc 42vb5pV 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 tgbjwy/q;:n+ dhrough a potential difference of 500 V. What is the velocity of the electron af:+d;/ywbn g qjterward?

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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 m+ta58tx 3t.hztj bk 0charge of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the z t0.kxt+3ma bth8 5tjpotential 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 2hro va1x6ydm1 cy.7cence between two parallel metal plates separated by 1.0 mm. What is the electric field between the plm 7v. oyrx1cy 1adc26hates?

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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 direc*kasp7 3dq qa;ted parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the pq a;s*dkpa q37otential 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 direc ag tce.9ahh0mc;19 f1aq5+d u bc*bmvted toward the east. If the voltage measured relative to ground at ab a+*vcmect ;1 95mg0hu aa.qh9cbfd 1 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 alcjw30a q 5,du8+ zps1zq,se.sql m/ reong the direction of an electric field of magnitude 3.0 V/m. Wqezlrqe ,8u j s50z3c+a/,. p swqsdm1hat is 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, are connected to a yc -gwu+sapx 8t0 74-lme2hyf 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrivf 7 hya4cgym+s2u0-wptx e8l-es 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, separatei,b 53h ye+4qvp j8 cwqamzp+)d 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, how much kinetic energy does tq+pvbj8a34)ywm+q z ph5 eic ,he 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 connected to a 122 uc h5ox0.os 8gdh8wu-V battery. An electron released from rest at a location 0.10 m from t8 suudxo2co 0h58.gwhhe 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 field ofzpxkdr;4* q ec 0qwn6t;cng-v,*) mqi 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 voltage at a point 1.0 m directly eas*r0; )cpqe dn6zgw ,*;t kqci4m xq-vnt 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.1(ay2ef jr)j xe8 u1q,-rwz8s jbi0 wk If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m directlyuke ew-,a(qrwj1x 2s01 j ijyrf8z8b) 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 thror;qgfb-evm .n/. 0 ;wbcqxb)pugh a potential difference of 12 V, it will acquire a kinetic energ x beqcv; fb/.;.-qrg 0nwmbp)y (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 distnr2xt ab9z*7sg 1m, bpance 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 elgnhpr3 8-3mlck(; o6/sgv rpn ectrical potential for the center /kr3p(n g8nhs6vl pogcr-3m; 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 w 1kdqapa3ow ,2 5smgt/)b6jea -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at q ,/mws3a5)t1ejpg 2o ka6bwdinfinity, 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 (3.0 m, cu /dt9 g2je,r0). 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, 4.0 m)?gue, dr9/cj 2t

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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, ktn:7c p10c ;fxqsf )o0) and 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-n1f pnx)sf7kc;ocqt: 0C 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 3*e o2-6oq yoel5e4amr /wd n5iiim;c charge +q are placed at the corners 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 cme le64enor3owic* 5 -qai/ mi;o2m y5d, 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 o cya* wifzu.8sw7c:vb*-w r9 uf +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the auu7b: 9rw a.fw*c- 8i*yzvcwsbsolute 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 fxz*dcnn y-dp- z)7h)b2jymqs 4, /djv i)z/q+2e, 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 charges, each of 2.0 mC, at mx 7i77wfqc/yho.s l* the corners of an equilateral triangle of c l 7h7si/.qmyow7*fxside 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 capaci9 7ldzys74)d3 g*fjezhc6wq e:t *bqbtor when it is charged to 100 V? ethg7z4jb3q f9)de7 6l: zwbds*y*cq

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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 px0rdvqr qjn2-s06,c blates 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 gwzpve0.;m al-ook98 1vq7sware separated by 0.050 mm. If the capacitance is 17.3 pF, what is7l. v1 zo0e sqkw8o;v9ma-g pw 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 of ag;pgzv-sy aj6 . n1re*rea $0.20 \; m^{2}$ 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 jme0 y4q0fnacs3 ,x+s a plate separation of 5.0 cm. If the potential difference between tys3m0 +ca ,f4j0qn sxehe 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 1i+u /xbjfr32+e)kk-q h xavvn7vv i7the battery 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 diia vv e/x7+kvr +7qu3k1 f2jbv)x-hnuring 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 capacitord9lx1h* 3d63 w udxfmt. How much energy is stored in thd16 l xf uwdx9md*33the 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 j;by0w feyr7-d*nm 6mzuk2.o mF capacitor. What is the energy stored in the capacitor? wbe*;f d- ynm67k.zj0u orym2

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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 cad+mol n.c (y)cb35 qpcpacitor when it is connected to a 12.0-V battery. How much work wa)+occmlbqd n(c5 .yp3s 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 4(mhk ty2qza2wp;wa--agj+ tso 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 p; z j6kblt5wy 3tor ;1rq:a6t$1.5 \times 10^{-4} \; m^{2}$ 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 wcebn1 0iw +n( xzu,x2plates 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 area usine.6t +8o,zmp;ot $1.5 \times 10^{-4} \; m^{2}$ 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 withsep,6.pgc)*ag 3p0dw6c a2 z,m agsqp 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 constructed f.rgim /s8) yy7:jkhv 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 isv itu:vj0w2k7iq .hn.lg- )sz bf7 *wi connected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielbwzi7 k0-:w)*2inj.fvvl tiu gh. q s7ectric 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 connected to a 50-x) gbj7i4e acc+wtev f8z)).gV battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills thbve zt+.i )j8ce) a wg)gcx7f4e 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 after the slab is inserted?

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