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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: 游客未登录  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 notkc,c+6k v;fege5 zzdmd9pe .9 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 is a67xxwehcq(;h zz 6-0yuaav+g

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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. Of7cw z7j,vnnt5nbk 87bject A has a net charge of excess electrons. Obnn j,cwf57tk 87vzn b7ject 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 tpa*m6;qy 73rmyg y(omhe 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 va/p b 0 kezl.p8oe3:qthe 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 conducting sp/uvwa y- ,nqqzs v08q jlywft)y 9)6-khere. 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 Vc+5 css-z9 8iuynq su4 potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball s4n yc5c+8 9iu s-zuqsbe?

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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 refer)0a:6r fi xm sznx4zhhb1;s q(red 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 equ5 fn ,yn57bvrjipotential surfac5nyb75 n,f vrje.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfa. xn p)nz*.wuhce 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 charge equ3k5vf y4cls uq89qmd6 al to that on the electron as a result kl 4vq9 f3s8m65q ycudof moving 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 is a+efq(rqbrr*if3 c0) z 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 co xpg, fl(r0 s ooff9du7*:+ehyrresponds 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 char+k b rks/01m0 y3wmxpyge is 100 V. What is the absolute potential 4.0 m away from the same mwy kx+s 1kpr/ b030mypoint 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 fpmti lm0jaaj;q(9 (r.rom a negative point charge is -100 V. What isa. (mj;(9 0r qiajpmtl the absolute 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 potentia- glg,p:trsm;;c:sz ) .5f +eswuqxr3e ha/fcl at the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. ,zt r:l.eps ;fshx-uwg)msg5c ;e/c:qa +r3f 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 .i tzv6x. yqc+9 0r1/dlbjfy .ti o(jiof 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 ceo1.iid. yflvrt cj 9 +.i0q/ 6xb(yjztnter 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 charghj5* ;xztz +jbes 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 6z+lhnc5gt 9ew 0 x+i7c+ rfrois 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 iy+wh.xfpu7* fz1 i1eo dentical in every respect except that one has twic 1uzfe *p+1 xy.7iwhofe the plate area of the other. 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 capacitor has a capacitance of Cm wd52m(3p70bcnntf;eeg6nj*zic 1m 3ni 3am . If the area of the plates is doubled anfne2nmj3i zn7b ;5e*mc3(cn1a miwdt60pgm3d the distance 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 parallel-plate capacitor fully and then is removed. T8u.0. ij zueny,h7by lhe plates are immediatel8uh bn, j.0ylzy.7ieuy 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 fielda0;buirho /3m q gvy62 between the plates of a given capacitor is weakened, the cap3mryoaiv0/2 g;h6qubacitance 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 are maintai*mq/k3dx)d q fcewf y(82.pcbned with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on thqx)dc (yffb w8*.d/3qkme c2pe 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-rbip5rbn)48e- f es2mplate capacitor are maintained with constant voltage by a battery as they)5ie8enr 2fmbrsb-p 4 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 for adding a dielectric material between the feaqj-dk m *,5plates of a capa-qd *mf5 ae,jkcitor.
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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 plates of a capacitor.-:r*y 6ndlc uqf4-vv04ydorz What happe40 fr quvdol* 4:c-v rzy-yd6nns 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 as paper is placed u86uo.xbp .*l1rlqmg :op1wk between the plates of a capacitor holdinglb .o r.l *ukxugo8pqm6w11:p 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 full fb9b+7g yxe/wy charged. The capacitor is then disc7 bfx+ye/b wg9onnected, 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 ofxpdtj,et(s2* l a7/xv a capacitor holding a constant charge causes the energy stored in that cap, dxt7jxl pavts(e*2 /acitor 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 store einzsfno/cyr89z8 i4ow;5j( d in that capacito4; eo(zw5nz8ijynfc98sri /or 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 1+shm4 fe9*asac,q e 9m0 C of charge from point A to point B. What is the potential difference between points A anda9cme*+ f ,4sh9smeaq 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 ct0 5zeym3p,f point A, where the potential is -50 V, to point B, where the potential is yp,f35tm 0ec z+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 accelerat8eulj9v* kl.;d, ccdned through an electric potential difference of 500 V. 8l jc,ec d;* .dvn9luk 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 ac0aws sq6m1l p/celerated through an electric potential differssal 16pm/ 0wqence of 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 p-1u: 6 4lps-xdvwbg rn0hef /jroton falls through a potential difference of 1200 V. What speed does it acq0b :pxuwgs4-dfe1 r6lv-/jn huire?

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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 lo3-uqqy55 0 ysasw )pin 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 dif+c -d2b1eqmmdbe1mu l6(bw8x f6ti ,jference of 500 V. What is the velocity of thxu m fqw1d(ij668 -mc+db m12t,ebleb e 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 mCw9r 6 0ft-6 :pm7fkeftsszv7w. The object is accelerated from rest through a potential difference, and k-6e pt fw : f07m6zvtsws7f9rafterward 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 electris:;zrqil3 lrtu7.: dtcal potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field betwet. :lis:tz;rd r7luq3 en 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/ ab*2s0 j28utkkse 7kvm, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what iask7 k8* et0sv j2u2bks 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 field of 50 N/C directed toward the east. ei-a-n ,+mw r fmqwi;3If the voltage measured relative to ground at a given point is 80 V, what is the voltage at m3a--m; +r inqwfi,ewa 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 (j+f8w-,e* t mla tykpm along the direction of an electric field of magnitude 3.0 V/m+t -k(8t ,fejwpm *yal. What 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 12-V batt*- y* -alpmputery. An electron released fromp*plm*ay --u t 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 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, jvvyh4rh.aw; k/765zy)su0gebx g6xare connected to a 12-V battery. An electron released from rest at a location 0.10 m frawr /yge5v hg4;s uxj.y)76v0xzk hb6om 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 by434ur hzbhd4lr)v 1fqh zz 8h+ 0.20 m, are connected to a 12-V battery. An electron released fro rl41qh4h3r)uz d+f z4h vhbz8m 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 electric field of 50 N/C directed toward the east. If y4eb6 z3fgwk 6the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0e6wyz fk64b g3 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:) cf)s3 +e bxdm:vmxo toward the east. If the vol)emf m:3x+): dbxo cvstage 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 potentialwtfx/s ;zo-a t(23 r.ttuf-c j44d /.pqnxoma difference of 12 V, it will acquire a kinetic energy (in the; t -t-socd24ft3/ua4 (q/o zn xf. mpa.txjwr 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 ofx17dz veq2vlrsh* m-;ex q(*v $5.0 \times 10^{-10} \; m$ 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. iq4 fz /hb9m.3qv5nhddv7*q f Find the electrical potentialfq ih3zv/f4*.mbhq 7qvd9 nd5 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). If the po krryr1wnwit :p 3.87i9ex-litential is taken to be zero at infinity, what is the electric potential at wiiw-er ltr7in :8rx3y9 k1p.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 5siq vm mo*)j*id1; fq(0, 0) 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 electric potential energy5v; m s**iqjo1ifq)md 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 a nk7uk;8 4y rec)op,qrt (3.0 m, 0). If the potential is taken to be zero at infinity, what is the w4;erur7qk c,)o 8ynkp ork 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 corners of a rec i.n ;5cnprfp9m -i0ooa0bz8h tangle of sides a and b. What is the potential at the center of the rectangi;iop r-pa.h b0o 0czn9f5m8nle 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 arowl2jw:;olra pz m r+s531 7v 1:giutxe 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 absolute potential in the squart a5vz:mx lpwois 17u+l: 3;wgo1rj2re'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 (c6b/akjjo 6vp9zt5, o x tnk:c6harge +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)fh9 o) l0yegc mC, at the corners of an equi cyef))o09l ghlateral 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 charged to5ts7sjvd (ka bmf,j j8r2y6yda 67f9q 1008vyjsk7d6a5(jy9ds 6jt m2a 7 qrfb,f V?

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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 o-*q74vx 4/qrczd:m me ek5k8 cssrmi9 ow :x9af 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 fi(hnhbl; ;ex4 mlled with air, and the plates are separated by 0.050 mm. If thehx(b;me4 lh;n 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 has plates of awxkr v ,lo 37t8)2x egtj6xlo)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 capacito ;zge)+w jv(lmyr/w7q r has a plate separation of 5.0 cm. If the potential difference +g)z j;rwmvyelw7 /(q between the 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- r22/:gxfdyvnV battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5xv 2 :rnd/2gfy). 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 capac(3dc,mxa s m toynor 36:74zisitor. How much energy is stored in the 3 xr(nyd a,m3mtsc:o7s6oiz4 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 mF capacitor. What is the energy st q*zzaoxijt 4 fz8gyp i:8p a4l,3nw(,ored in the capac(j ,tp* i34yzz: ipqwflzn8ao,8x4agitor?

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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 oyv +38y:z w.0yz /zzjikz a7hynto the plates of a capacitor when it is connected to a 12yzjz8:yka 0z.w+yvz y7h/3 z i.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 charcgb8wkv6j*y; i 2e 2neged 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 o0em,2oxn06 jam l.sf gf 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 consiac5*w;vfqu/ g+tr/ qf y: ds(qsts 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 plbk,t5bv uwx ++k1dz 2 rp6dfm.ates 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 5myfr1o/z 4 sewith 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 with plate afmue0+2r ub.luo-/g-k (e paerea 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 ab/bwj 6o.fod 2po(kd /nd becomes fully charged. The battery is removed and a slab of dielectric that completely fills theo.wj (b/ foop2dk db6/ 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 fully charged0 wow:6ypkx0iwrm: +t . 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 :ymxotk:i00w6rw pw+ the voltage across the capacitor's plates after the slab is inserted?

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