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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 vectmdwwc xte(4v slp8(+eks4n7+ or?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombne- s y6xaxr/9 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 ob s3hrfzv m3n8.(xb;lkjects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. k;z x.3 bvmlh(8nr3fsWhich 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 thezbwh31a(w br / 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 the ev 2ain31 cf4:o6+ titze nwk-alectric 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 xxft djnh. e*r(m 77bw67lmm5a 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 accelerated frsq fl dbq6gh1nw5h* td:75n(wom rest to 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 bgntw57sf5( d6qhw n d:bl1*q hall 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 pointsmi,zooh d; ovm2(jnt/ c6 k5s0 are at 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 ekb lsb -6k*t2equipotential surface. sb2bk*ek lt-6

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfacelvae mr* sa7etd r 3m;p-/b3)p 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 equal to that on xces p5l6iwfrqk-y d+ 91az) 5the electron as a result of moving through a potential difference of one 9 dzp5r6ac i f s+y51)ekl-qxwvolt 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 unuzq +byd8wn: 5knoo.iq+ y53git 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 correspond zdq;h *v. tuh3oc1(8so nlyl t)xl7w1s 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 )x )pyfc2izq6from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point cha2zfyq) ixpc )6rge?

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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 2.0tpdi)/21ev2:2 tqc0 ctsp kbj m from a negative point charge is -100 Vvp dcc bk0is1 /t: p)j2q2ett2. What is 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 potential at the exact center of a square is 3.0 V wh:e vk 5pr3+)(vzcay tef v3e);ofy3 epen a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's cena;t(rp5eyov3ff3+ pz) ve c3):k yeevter 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 . fe (jhrrkr2,0p rv9 hsnhl1ouix1p8)w +hk2when a charge of +Q is located at one of the square's corners. What is the absolute potential at the squareunr)1(j10phif ,8 +pl2.x e 2kw9rhhshko rr v'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 consig 3x+0 hsic2kvst 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 isoas9vf+df/3 1o bby7h wyp 9+w 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 evn r,p5xm0:x qfery respect except that one has twice the plate area of the other. If the smaller capacitor has capacitfn rxq:mx,0p5ance 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 C. I24q)nwdr8hlq3s :kl. o t5 udgf the area of the plates is doubled and the distance between the plates is halved, what id2.:4) rl kh8uq gs5ln3tw odqs 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 capacitore.1wd/7mo k(td nj a.a fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates/ d.ej(.n mkot1d w7aa 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 ccba z+bnf+l8e6 6gd1mapacitor is weakened, the capacitance of that cabm6 l6dc+ 1be gz8f+napacitor

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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 parallel1 6q)xs fw2hff-plate capacitor are maintained with constant voltage by a battery f1w) 2s6fh xqfas 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-plate capacitor are maintained with constant voltw:sd i 7ut razc:(4,o d3gt)kxage by a battery as they are pulled apart. What happens to the s:7wgrtk i)s,a :xu4 dcdo( t3ztrength 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 adding5 ,, p4r4+pvfd wo-.ukdt ebsknfag-- a dielectric material between the plates of a capacip r-w.f-td5,ufkd a,pnbkoevgs+ 4 -4 tor.
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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 yz5s;g (r xf9c x,hsj1paper is placed between the plates of a capacitor. What scxjsz,g 5 9rh;1(fxy 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 as paper is placed between the plate.4 qt9eisjg 4ws of a capacitor holding a fixed charge. What haq4est.ji4w 9 gppens 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 toetd46sp u ts3u8roqu/ ;ce/j, a battery and becomes fully charged. The capacue t8rto4sepq;u/ ucd sj6, /3itor is then disconnected, 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 of a capacitor holding a constant chj+qs 60o44vbbp iqn97ulmjb0 arge causes the energy stored in th 4msj+b049iuo7 qnqb0bpvjl6at 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 inno+vj)y7d ve 4 that capac7 j)4e+y dnovvitor 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 g0gx(i vhex. sn8l ud* )4vkx-to move 10 C of charge from point A to point B. What is the potentiae8( .0vlu ihds-)*k4 ngxgxvxl 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 (l juw;j *ddr/moving an electron from point A, where the potential is -50 V, to point B, where the potential is +dwjru j;(d* /l50 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 lw f hq* b9dlx**f:rbqpu,65 j6l01 s bqmun*prest, is accelerated through an electric potential difference of 500 V. What is the kinetic energy of the protonjfl w,6d *lqlqb *5b q ur:p*6sbn1*m0fp9hux ?

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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 accele abaqja1) 1-v12ccquvrated through an electric potential difference of 500 V. What is 1qqcj 1bc1v)ua vaa2- 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 diffjxjdt 72 dhkcn7+z7 5xerence of 1200 V. What speed doekdtj5x7 7+j d7nx2zchs 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 94np zef0)b5bti zkw4n.*3q s xq:hua2.0 V 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 electro*8pbxi 5 7tfqu0vz3qpn is accelerated through a potential difference of 500 V. What is thebqpv5iq3t7f8 zu0 x*p 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 object is accel+zmu td8i5h0verated from rest through a 5m 0d+iu tvz8hpotential difference, and afterward 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 elect(xb,pt4 :abr brical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the4r: pbxbt(b a, 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 mavs jezo(j;(eh6n ii,-4 qj(qugnitude 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 potenti vn,i qeie-j(uzoq6( 4j; hsj(al 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 elk-rqm0q4po z: ectric field of 50 N/C directed toward the east. If the voltage measured relative qkp0-o:r q m4zto ground at a 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 along the direction of an el v oub5 *bg8meta)r7k*kf0bp (ectric field of magnitude 3.0 V/m. What is the cb7ge)ur0mt 5b ok 8(v **kapfbhange 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,eybzkwlzocw*n /2 fa0 6g2(:g are connected to a 12-V battery. An electron 6eg/c y:n20kg*2w awlb zfoz (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 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 co q83awwz),vixh: j2btnnected 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 platewx)3,bi ta vhqwj2z8:, 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 0.20 m, are connected to a 12-V ba.1eqnc c2xp wmot.rm9t2 7*fvttery. 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 pla27cxw ne..2 m* tqrtp9fm ocv1te, 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 di,c/gq h0n84b gtp ci (f73gatmrected 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 east of the p7,thna g0b38picq g (g/4mtfcoint?

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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 5uosvkult8xk*j ro k9os43 2 )of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80stuk2lv59o *) o4r8jsx3oku k 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 differenczag6q6 vpt08oe of 12 V, it will acquire a kinetic ena6 ov6gq0 8pztergy (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 -;o qg23(i0o mfhrcxdof $5.0 \times 10^{-10} \; m$ 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 455f0l rjwtsaends of a meter stick. Find the electrical potential for the center of the meter sti 5as fjtl450wrck.

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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 ).eo,qu s-out-nC charge is at (3.0 m, 0). If the potential is taken to be zero at in-)uu eo,o.qst finity, 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 x2+2iyy1 ytpn+xq vp6m, 0). If the potential is taken to be zero at infinity, what is the electric potentiy+pqxv 6x+yty ip2 1n2al 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 charge5s f2c v0am0sm 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-nC charge from infinity to po0s5v mf2msc0aint (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 placyk;n:gpn3 d-red at the corners of a rectangle of sides a and b. What is the potential at the center of t;-ndr g :pk3nyhe 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 placed otje w)moq 58+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 j o+)5wtq8eomin 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 +2x ck,zqh w()0tbv3h;me, 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, eaj*u;e 1(07ilh azkiqf3b,u qs ch of 2.0 mC, at the corners of an equilateral triangle of side 2.z3l1q s jiaik(hf0,*uq7eb ;u0 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 a4qz;44 ngwq z1yi8bkj 2.0-mF capacitor when it is charged to 10z41z4j;ngq 4iq 8yb wk0 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 ha b)awfo:h 9cd,s 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 cap9tmecs)vef ; *qz,3 skacitor is filled with air, and the plates are separated by 0.050 mm. If the capacit;*f3 ,kt meqz)esv9sc ance 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 uxv27 w b5gy ;rsa gsx(7u9q+aplates 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 r)0-uoh 7fbwm r +lf0mplate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at lf-ow00+uf rm7b ) hrmthe 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 1: g)ekoae/kfrlg5 6o; 00-V battery. After the battery fully charges the capacitor, the capacitor is/lgoreok6g :ke5fa; ) immersed in transformer oil (dielectric constant = 4.5). 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 capacitor. How much energy is vcn-s:*qnc1 t -o *mblstored in the capacitor onc:mtv *1 *b-c-slqn?

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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 tp26p t rqo w vtwpqd/k8:-6mx,he energy stored in the capacitp / p2qt6qr o8-wx vpmt6:wkd,or?

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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 fnm,6 ;cxyz4rflows onto the plates of a capacitor when it is connected to a 12.0-V battery. How muchn6;yxzm,c f4r 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 charged so that it storeslxsh0y,3u g9sb)d6nenx : (wp $2.0 \times 10^{-3} \; J$ 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 co7)rrhf9iajyd h j 7fi -aaj99;nsists 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 capacitor h(p(x,83x6y ffiok elilm0*zconsists 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 w,d fi dmia/54plates 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 capacitorof; 0rus l+dp9f5; yxf is constructed 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 capacitor is constructed wxvx sb xk1m; 5bzu;5x8ith 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 50-V battery and becomes fully charged. Teb9.pztfa 0;vo. .h qnh1(v3cn z bfz-he 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 capacitance of thzc 3bh.nv ;(-ab.v9o1eqpfhz0 ztfn .e 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 fullyvs/ .9q ndj 9qngu-tb3 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 is3tj/u gqnbqv d.99 n-s the voltage across the capacitor's plates after the slab is inserted?

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