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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 i/gx6 rg; 0vdkq /wiq6ms not 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 coulomba 04mhqay0za3 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. Objectakr/o.gh3ah 4uy,4 p s A has a net charge o .yhrg4 k hup4/as,oa3f excess electrons. Object 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 fteo p 9**dyzjhb, -:t0-srqwaield

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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 directio5 nbg qj/v8 uxj) u0 yivy4enz4td;bxhg)v;-0n 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 condu *l2ba zq5hrtbq-3id+cting 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 z7pw)e- ek ink-m8 g;oto a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball be-8zong pe -)i kew7km;?

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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 thownh-h;0rjbe4f d:- x2+c tlse 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 equipotent d s+kbqd7w2ok6)l +dztk-e :vial surfacetkb)2d edo+d7vkk sl+ q6: zw-.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface jg; :e//a79ax eda jcomust 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 equal vy s *8nuu-+ztoyk:; -tzd xt/to that on the electron as a result of moving through a p zn-kuyt /o+;vzuxt d*st -8:yotential 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 xa3 31oxk wkixs/ 7ou+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 corresp s7, ;t9a*ww+ddy lqhnznu +h*onds 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 b.(7tzol) 9.mvihc4o wom2df a distance of 2.0 m from a positive point charge is 100 V. What is thbh omtmoc.f)iz(942.ov dl7we 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 k;dv;h ,pi*zw2.0 m from a negative point charge is -100 V. What is the absolute vhip*;wk;,dz 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 potential at the exact center5f t3qx2qy g5m 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 corners is also fil5fqmyxg3q t2 5led 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 sy mbp w;wcy52.quare is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolutebp52mw wcy y.; 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 alw snbqeu25ob9(ays consist of two 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 isrey/9m8fw6b vrs(u 6 (9yiwr m 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 respe cfok)+dk7trmt 7l.y 8 3dgtd7k4ckm7ct except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitancg3ckrmtd7c)k7odl.ym kt4kfd+778 t e

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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 capacitanc 9jr mlg7)ni/me of C. If the area of the plates is doubg97/im) nmljrled and 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-wwsezg9e3 hailo4//7 q0 k4ht1p*rkjplate capacitor fully and then is removed. The plates are immediately pul/9zsji p0/hohgw7kqew kra4t e*314 lled 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 beaf*3 4tjhdmm0:mosi +tween the plates of a given capacitor is weakened, the capafm4* 3+hijomam:td 0 scitance 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 co6/nr mfom*vr 8a,j1puz.w5 maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the5v8mrucz. o rw6*/ao,jfp1 nm 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)9b +,* * uxalhy(7:rhi9 feqttnabp n capacitor are maintained with constant voltage by a battery as they are pulled apt*i n(7nh ry+fa9qb, pha)tb:*lux9eart. 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 betweex.r5qf o rh-2y)6 qjhcn the plates of a capacitoq-qjrf6 .cryh 5x2ho )r.
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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 betwemv7gsa1ea9u3-wf )h zen the plates of a capacitor. What happens to thauhefwza gv39sm7)1 -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 k emj,m-)mu;kis placed between the plates of a capacitor holding a fixed charge. What happens to the)mjm; eku- ,km 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 becxb* a0nd7i8fl8- xu zoomes fully charged. The capacitor is then disconnected, and the s* iazl88xfboxn70 u- deparation 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 constant charge causes the eneacr 874 a4pt,mm ejpo4rgy stored in thjp744tp m8aoma ,ec 4rat 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 th8v6 1t b1t*t uihed*6qlc/fmk e energy stored in that capalkqfd8b1ihm* *vct1/ ttue66citor 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 tvi,p 3ehclkx8nf)+b0k(vc 6 of charge from point A to point B. What is the potential difference between points A and fkc(h,)cxlev8p i+ nt03v 6kbB?

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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 fv(*keq e1fj8arom point A, where the potential is -50 V, to point B, where the potential is +5ke f8jqae v*1(0 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 pote:9(12djaq + yg2ejf)u esohsvntial difference of 500+d ueh1je:jsf( v)9yo2q sa2g V. 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 accelerated through an elew-v;9*supxter g7 7bd ctric potential difference of 500 ; wxg-t9*7 spduve7brV. 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 protrc:0hp7 v0)hxbas9 fzon falls through a potential difference of 1200 V. What speed does ita x bsch0h: fz)0rv7p9 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 moj tr(a*u42af42 zd rxhving $8.5 \times 10^{18} \; electrons$?

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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. 8ns5xpupff+ d h3sa 8dk 3ptl: ka/95r What af ft hd588sln pu9+rs3pxkap k:d35/ is the 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 mC. The objec9 (2) mmm 1wzflb vs q7vt)g;ytkkin4/t 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 potential diffntgvwbzk m94(mvymsf 1 tq)2ki/;l )7 erence?

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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 difference betweenk ;dioo: 6kih5 pr77jc two parallel metal plates separated by 1.0 mpc;kd6r7h7 o:io5ij km. 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 V/m, is directedyy gqtyai *) byea x;eljp4.vc6b 0455 parallel to the +x yypjbyb q*exv.ty;a5l4 ac0i4)eg65 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 electric field of 50 N/C ap2 vwk.3 enl,xy+,j3 m zp/iq3i ufr9directed 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 west3,jl+, fnuai3yxmr3 z2ke9 p/ pvwiq. 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 field of magnhvj8qt fcs h1/w; gw84itude 3.0 V/m. What is the change in kinetic energy of the protonh 4v18/ctsh;gw q8wfj ?

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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 conn1 o88bfc ugkag6cx2 g(ected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the eg g2uxcc6k8a1( 8bgfolectron 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,zz26m0;w9 3slt fke xo separated 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 zxzo e6wtf09l;s 3mk2energy 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 conn2 0*55s4w npvq( aiq6yljpmg wt)o1dgected to a 12-V battery. An electron releas w*sljt5 gd6gv1noiam20pwq5p4q( )y ed 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 electric field of 50 *f emz;in t(g: 5t9/vbgx;cslwb1xp *N/C directed toward the east. If the voltage mea9wi;:/*bvf tgx g1xc(me *z;5 nlstbpsured 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 electric field of 50 N/C directed toward the east.) 5n* 2iybyuoo If the voltage measured relative to ground at a given point in the fni ub5)o y*o2yield 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 potent7nmn7 3hxux(aial difference of 12 V, it will acquire a kinetic energy (in the abse au nx3mh7x7n(nce 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 b v 5y3a7py,z: -cymlhof $5.0 \times 10^{-10} \; m$ 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 electrical pote,,le7,+d:d c dmna dcs*g5j jah:ns (jntial,(+s5dsj,c*dg:ahn, cddne:ma lj7 j 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 thrc-t)d kjtbvs,g0u 2q*ia/w (e potential is taken to be zero at infiu2g 0 vdrb/ktq*iaw-tc(,j)s nity, 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 (3bq fziyj7 sx-0hag37 x)s*9sc.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 0iy 7gfss*zsx79ab-3c hx)q jpoint (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 cha)j2.c ix(zjpsrge is at (3.0 m, 0). If the potential is taken to be zepxj2. icz( js)ro at 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 coryulwaa**l 9 ;)j i((gbvn8pj pners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.( )ppvjjg nl;yu(i*9 al8aw*b0 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 two diagonally op wk-he /x;wc99hd +xnrposite cornerk/+nx-h9w x e9whdc;rs. 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 (cha/l (-xjqc6u v ye:9cxzrge +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 cyp e;t, (7ktebo:q6nqbcla: :harges, each of 2.0 mC, at the corners ob;qnt:ceyp (,k7be:t6la oq: f 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 okxd.t0-d ve2 ef a 2.0-mF capacitor when it is charged to 100 d -ev20.ekdtxV?

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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 aremsr8 nmc*2gks: (cp.fx0 lyc7a $0.50 \; m^{2}$ 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 0mgz47k*gf)pdnd: cqo 1o*;mc3 gixg the plates are separated by 0.050 mm. If the capacitance p c0 q*dgfoz ; 4m*i7 ggndo3c:1g)mkxis 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 platexo3 ydy as5d+*d4u q(xs 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 the pa73iey ghu0 h,(ix) isi1p, gph)fvf 6otential difference between the plates is 2000 V, with the top plate at th)ihfph6f3,)ap7vu gyi x0ih s ,e(1gie 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 i9ve c*j1k/ fzacross a 100-V battery. After the 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 remainj v1c*/ki 9ezfed 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 oue,5 i9gbaj/nwr2 tl2n a 15 mF capacitor. How much energy is stored in the /5ig2et,9barluj2wn 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 acrosszqhl -enl, :v4xjz 3 ac.r4b5q a 15 mF capacitor. What is the energy stored in the capacie h4r ln3,5c.a-v: bx 4zzqlqjtor?

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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 i , i,l:0z5*9phr-bs7tswlnt5ulm z ybt is connected to a 1z* ni5shtlpr 0:, -ylub7m5s lbw9t, z2.0-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 chargedclgim/6ky; r3 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 :0 dyeb 7tly1pof 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 consists of plates of area -5j evnz zl+g4:xs s;l7kg5jer21 zyl$1.5 \times 10^{-4} \; m^{2}$ 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 kbs/vuzmen* fc38* x4y. q,nb$1.5 \times 10^{-4} \; m^{2}$ 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 *jkkx -dupwn( gnvmy6)p7 7m9with 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 wiw9/adso,g keon/n d1)th 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 x9 ,ymx7.fs3yg; rrzx50-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 difg,97x s zrmx;yr. x3yelectric 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 58+zh*jq5+pusz bv8z q 0-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 after the s jzqz8uz hb*vps+85+qlab is inserted?

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