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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 v9h /t8 tph+zslector?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomnv1t n4g )vsuea2*w6pb 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 surroun h wzc u1/qfur.nng .a5tl-f.(dings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher poten nf5 nt w(.g 1uh/..fzucr-qaltial?

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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 direc82xp hlubs ;o,tion of 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 in4 k,66qp3nve (vjbjn a 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 are placef530uuus+r dp)9 b*r cr,+kf f 9mlbrwd 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 iskdk j;a/ q9ta( accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will th9ak( dkajq;t /e 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 same potential wru(j h7d.j e: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 x*d s q9g4w :0lhaff0wA to point B along an equipotential surfacgd0:fa* lfh4wxs0w q9e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mudr5zi5rf1q8 wst 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 cavc;6xdpqn w 5cv257fj rrying a charge equal to that on the electron as a resuwvv52 p f cn76dxqjc5;lt of 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 unit ()z.pi :eekkud37 s v wek;1zuof

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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 to 610needr).qz a wmhx5

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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 charge x:wyf.ud5j oy+t t-k.is 100 V. Wtd+w.y-: xjyu.fk5 o that 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 distnc.ix7sk)ll ,stdt )*ance of 2.0 m from a negative point charge is -100 V. What is the absolute potent,k.lls)ds*7 i ttx)ncial 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 by ml8d )h5o,i*gj t5hthe exact center of a square is 3.0 V when a charge of +Q is locatg5t5 )j 8iydlm,h*ob hed 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 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 ;)mc wp3gyy , mory.2puj2j (rsquare is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potentmoucm2r prp3 w)( y,y2;j.gj yial 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 alwaysmp59nucfw1,;-rk /uyw j3jnu 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 is aypz+sd, byo f,nn8a z2l7aycm w:f))5

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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 i8; npns(arv/usujld x// g68 mdentical 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 capacitad// mvurn jx g/s aus;6(np88lnce

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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/l q /g iz00pf +w3)j;fnzbzpne of C. If the area of the plates is doubled and the distance between the platl/)bz pn+np0zi0qj fzw f;/3 ges 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-pl dofch* + f-,u.js1ybfate capacitor fully and then is removed. The plates are immediatelds j., cubo +ff*-fhy1y 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 givfmad 2tso4i ,5 brxo9t;rg 4r1en capacitor is weakened, the capacit gr9b, xaromti4s fd or2t1;45ance 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 maintained with constant (n(ta 8cmwm9w3b lr- fvoltage by a battery as they are pulled apart. During this process, m -mc 9tf(3r8b(wwlanthe 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 constant volto4t(r rx6q zsfr.)kw *age by a bk4wz()or.rq r fst6*xattery as they 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 plat60d+l luhd3wq es of a capacitollq3dw60uh d+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 pl(fqol+* kgf l/ n7p+ihaced between the plates of a capacitor. What happens to the capacitiql fog+nf k(*+p7l/hance?

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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*aabn* wpscy h*j bq (u2/ys96 placed between the plates of a capacitor holding a fixed charys 2sq (*cw* h/9y6an aupbj*bge. 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 connec1owp70 n i+7dn4dm t:)ir9xxbv:zrppted 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 leaks off. The energy storeddopz m7xwd:i1 )90:bpvpri 4tn7+rxn 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 sla tmr wh21sejo/ 7sjzg*;5,capacitor holding a constant charge causes the energy stored in that capacitor ts,; wg aj*smozj5h2er7tl1s/o

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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 thg*k8qqc2l 5 acnv dp:pu )+mp:at capac +:nccduqq )v lpm2p*5 gkp8:aitor 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 88he yct-;fclmove 10 C of charge from point A to point B. What is the potential difference between points Af88;t hccley- 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-ik jnup /l-o7b1kz5cakmi 01re the potential is -50 V, to point B, where the potential5 k0j bucnk/o k71pa1 z-ilmi- 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 *. yg 70x0bhtwqtd-f hrest, is accelerated through an electric potential difference of 500 V. What is the kinegftb0- w*y07tdhh x q.tic 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 accelerato -*kjw xszfq j;otm81;fgko +x3q2 z5ed through an electric potential difference of 500 V. What is the speed of t qxj;kjx gzf3 o;fm21t 8qo*5+w-z koshe 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 throu q43iuxew5ms0gh a potential difference of 1200 V. What speed doexus5wqe034m i s it 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 o0 nsis :l6q-jf nq wy+:b:1slV 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 poth3hoqa xi:)3 xential difference of 500 V. What3h hxxoqi a3): 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:vx:n q-rxhst1 7)twq 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 tsntqx)-1h:vrq7:wt x he 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 difference pvyk wf:; h07mbetween two parallel metal plates separated by 1.0 mm. What is the electric field between the pv0mkfpy :wh; 7lates?

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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, 9 +mi pk11vj+-c5jctqe3 tnf kwith a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the pote5kc n1vjpimc -+kt +91jt3qfe ntial 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. .ghw )gp9 )h o+0h xs6ej;wxdbIf the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly wes9.bw)) h0hpd;jh gxxwe +o sg6t 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 alonggsy*iri qy-l6 mwb:u- 65p xb, the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the pro6sy*5, gpq-ybxi lw u6:bi-rmton?

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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,irjamulf(i y7qu/k/ 02jjj :1 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 1.50 m from the positive plate, what is the potential difference between j:(1 j7m/0iqu i uyj/ 2kafljrthe 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 battery. An ;q2(n+9ukxkhfnhu uw5,b.u u )/r avl electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a quw(hulk2nvu+n/5,9 .kaxb; fuh r)udistance 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 by 0.20aq.q tz17c6h,6w:py/ d2/b ci ,yxn smo1 ijcv m, are connected to a 12-V battery. An electron releav,i/hax zc pmcd6t: ci.w2 y1y,7q 16ojsnqb/sed 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 N/C directed toward/c,tmon1 qxp 82a)npq the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage moncp,q82xnap q/t 1)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 direc4k6y 93dza7dyb(mw lited 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 13 6 m k4yzi(yald9wd7b.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 diff2dpr5j ulzs 00erence of 12 V, it will acquire a kinetic energy (in the absence dljp5 02r0suzof 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 nro+7wt3 4jxpo dz tm/ pl,7h5of $5.0 \times 10^{-10} \; m$ 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 mbuv0bnp, b g(e/3 )dwhp:t6dpeter stick. Find the electrical potential for/gd 0:b 6bwv ,npuph(et3)dbp 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 p kd3xr.7 //w or/hyfgoo5* 9nks uy)snotential is taken to be zero at infinity, what is the electric potentia ux953 h.yn)/gfs o/os wndyok/ 7rk*rl 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-n:yul:u0o:o (f dw vj0njms +i0C charge is at (3.0 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 point (0, +w jnuoyf0i:v:osj :0m(d l0u 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 4 dqf8)pacg3e(3.0 m, 0). If the potentialpec qad)fg438 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)?

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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 rectanglege v5lxmly,+ o8- s 98bhjjau; of sides a and b. What is the potential axu, 8eb+ 9ol 5hma-y8;jl jgsvt 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. t n7k4g,8qoujez;z s+ Charges of +4.0 mC are placed in two diagonally opposite corners. In the other twos8ge jq,zoz4 tk7n+ u; 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 +2exiwc)l firqncm1-25 (, 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 the corv6gj4e/nz.poy2 x5pfners of an equilateral5g64f.p2x pj/nz ev oy 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-mia; tv2 mj03t)t3aue5kx; hojF capacitor when it is charged to 100 0 jh;otj)ux 2t3 ei5t3aamv;kV?

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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 plat5g aggh)ly1:jes 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 filledkghv9er ck5npk n ejh0,sz*8 yk ,0s;5 with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plat,hege nkvh s,8pksc 5kr*;00z5yjnk9e 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 pla ;8i /tuqy8zuates 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 potentiawdr 51kzcax7 8l difference betweenk75z1rd8wx ca 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-V battery. After th n- gdr1d7+a4 h2f8 ehb*dtgjee 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 2ghgd h -f8*bdnde17te+r j4a 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 placedxgbjr: 5ars /s 5+:c7cdil 4pr on a 15 mF capacitor. How much energy is stored in the capacit:x:5rjr s5 dgcr+i/lbpa4s7c or?

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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 i)ck js6 x,xee2+,0cmi 7 e dkolk,d,+pmhj t0ms the energy stored in the capacc, xj+,7mc 0tlme oekk d)shx,mpd ek,ij 0+26itor?

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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 it is()jmsq1,zv eqtw nn,-1x 4zwc connected to a 12.0-V battery. How much work was done in charging thic,mnxqeqs 4w1vjtznw1) - z, (s 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 s5k+yuf:jo7qed:) hy co 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 consir 9 7a,v,ltlpzsts 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 capacit rb gvp /0q))ux6)znbtor 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 arp: g 2 abhby8qjrm4rn6i(-cl *xr k- xa)lk(+tea $1.5 \times 10^{-4} \; m^{2}$ 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 06+anzp f d5buwith 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 area o)0ptsp2pn uhnro, /g, f $0.40 \; m^{2}$ 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 and ben7 sw*3gbfdn0( u)v ewcomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielnbuws0)d nf (v*3 gwe7ectric 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 c-zizfv o9j*9 zc 4l /*e+gsmznonnected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that compl**zjvmf-c9 zsel9 /+znoig 4zetely 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 slab is inserted?

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