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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 uv dx.souy/vz lt5( rxm::), pis 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 coulomb a k::232v3xew*o u26 aalijlhok1sx x 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 su +dxsp:davsrhj.i g r7i(+ 30r,kij 8zrroundings. Object A has a net charge of excess electrons. Object ,zrv. ii jssa ixpgr:+0k+d3j(8 h7drB 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 e*ore*2 g(hudf/1w li7 b2bpithe 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 ef4a( kv(1o vvplectric 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 placem5r22sl 7 hyp,qq0s ggd 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 accelerated from rest to a speed v by a 500 V pot2fjcb4 4 jt)kmential difference. If the potential difference is changed to 2000 V, what will the new speed of theb4)2 4cmjtfjk 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 aaqg: d :;i1baqll points 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 equipo dou3a((;m clltential surface(c(md l; uola3.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfay+ezwx q*9l.q7 vub 9u,ly vm1ce 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 q*r;ro5ycv s(,n 2ed ea charge equal to that on the electron as a resul q(nr;vd* yosecer,2 5t 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 is0 vavv7.o3; 9of3f:jqdvxazw a 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 corresponds tocxr7h/nv3 th 9 p,hd0k

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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 pointah;edf +y6yt4 f e ,.ox7re*af charge is 100 V. What is the absoh f*d.efraeo +ty,f7xey6 ;a4lute 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 negsy+cv)x**, mn y0 dn0ew 5rgfhative point charge is -1+5 ,w re*nxcvn 0dsfym h0)*yg00 V. 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 wb1(;-mzrf ex o tckk))hen 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 o(fkkxt-c1;z )rebm o)f 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 sbf:8tgvi0u5cag 9r41co 6 ko mquare 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 a seconc5k681b:9 o0v utagoifm4gc r d
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 charges thari-dhjirynld6p n*:mr() e) , t 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 ann-ejwl)2. ej

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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 respect except that one hfe ;r0+25v5vvz vlfd gas twice the 525ff 0 zvl;dvrgvve+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 capacitunynl h70aey6 v;g -;cy:f/ooance of C. If the area of the plates is doubled and the distance between the plates is halved,:y fn yluo/g7;c;6oahe0 vy-n 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. The: nj(8w-j1udkva rm:v plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the njd kv1a(jrvm -:8 w:upotential 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 ofbv+b pr7xoqnu12( ut u82 tsz) a given capacitor is weakened, the ca1bnuq28p z72s+bur(uxtv) topacitance 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 a dr8df-msgll9o5 j 4q;xl kk4(re maintained with constant voltage by a battery as they are pulled;dolfkkx4s j9(5q r48-ml dgl 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 capao *lfr:snsir 5)c(npb5 z1rxg4 h5h-kcitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electricrh n n5rbozcpg-14irk )*fxs (l5:5hs 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 forcg)0v w inoki69,no w; adding a dielectric material between the plates of a capwo)vg0o k9wn ,; niic6acitor.
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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 plavtp6p+m f,lp9 ced between the plates of a capacitor. What happens tf mp9,6plv+ pto 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 ncax**)6dczxssl j1 +is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field betw16 s +*jlcnz*sxda)x ceen 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 becomesp62z.,q9ph aun nsu w3 fully charged. The capacitor is then6n a.s3p2wu , nuqhp9z 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 charge causes the 17kny.o b9kyv energy stored in that cb9k.yvyo 7k 1napacitor 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 cbq1d xku5 tx;4auses the energy stored in that c4 d1;xqtku5 xbapacitor 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 charg6b k0oc; g(4z6vguhfye from point A to point B. What is the potential difference bob0k;zgc uy 4gv (66fhetween 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 electrn:+ mmf,5kmrc on from point A, where the potential is -50 V, to point,m+ :rmkfm5 nc B, where the potential 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 anq;pqf*6 j *fowmnn;4yxpm( 9 t rest, is accelerated through an electric potential difference of 500 V. What is the kinetic energy of the prp9x;qj*m ;f6mwn 4nn *y(pfqooton?

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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.vfmzt6 w.) :ndtlp2 orated through an electric potential difference of 500 V. What is the speed of the pnmw6 pz: ol2 tdt)fv..roton?

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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(r-kpa(ccc5 l: wgkt;cu+rv4 through a potential difference of 1200 V. What speed does it acqui5gra +clvk:k utcccr (4(p-w; re?

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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 Vu if1,qaow3/ o;8mbjm 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 potentip :cz g;mw:gd0al difference of 500 V. What is the velocity of the d:gw0cz;:g mpelectron 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 ch5-aeo4m 2xgsf fv4)xharge of 20 mC. The object is accelerated from rest through 5vh g-e4 ffaox2)sm4 xa potential 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 thepg,)-ba ;/mdmkz 2kctdq:wy . electrical potential difference between two parallel metal plates separate.-dm qcm t),; wybzka2g:pkd/d by 1.0 mm. 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 dirfearn d- f9:(wected parallel to the +x axis. If the potential at x = 5.0 m is 2500 r :d-(ef fnw9aV, 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 2ro7c j p2ghckxm **575 pimyfdirected toward the east. If the voltagec*g myhoif725j7 r5 pkm2px *c measured relative to 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 electric field of magnitude*r*0xj*0g 7vwwgi kqt 3.0 V/m. What x0 kwri vgw 7*jt0q*g*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 bw-/h--y2 b;fi bpj gs 8kljie4y 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 1.50-y- e/ 2gfbp hws;ij-i b8lkj4 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 b0sa3dg/ 8mb1djbdttse 3s8x ; y 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 ener81m gdsb/0 aed33djtbs;8t xsgy 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 12etk go.nd,g:hhxrz7,4tz 2v5-V battery. An electron released from rest at a loczh.zoex :24,5trhnk g7td v,gation 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 eassp a41nno :fk-t. If the voltage measured relative to ground at a given point in the field is 80 V, what ik: pfno4a-ns1 s 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. If the v1 pqq 49jmpozblpe6j+o.l q)1oltage 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.q jo pjo)lq9+1mqlp4 1e 6bzp 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 difference of 12 V, it wi5gm1h 99+u 3n vvsdqrnll acquire a kinetic en13+m9s gh5nrdv vqun9 ergy (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)oc(5zt0 bht: wz edu jzu y+h;)j05qff $5.0 \times 10^{-10} \; m$ 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 oo w7ggn w:)yg+f a meter stick. Find the electrical potential fwwgggon7y +:) or 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 ch iu0jmmu)5uqfm*rd( ars*1 c1arge is at (3.0 m, 0). If the potential is taken to be zero at iu( jm1ia )s5mm r0*1cudq*f urnfinity, 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, 0). qt-wcr/ u mw)cew*6/ 4g-ifwz If the potential is taken to bw-uq4 wm-gf 6i wct//)e*z wrce zero at infinity, what is the electric potential 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 charge is at (3.0 m, 0). Ifdtls/smjo:;i k7*v*l mj) jo/ the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge fromjml iljo): m/tsvk7/ods* ;*j 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 rectangle of side cb 5,.5w6.pmqriaudx s a and b. What is the potential at the center of the rectangle if q = 2xpru..5 m b,c6dia5q w.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 mt7q74 k(h8sv eyy ifci vb,eais-3 +g2w9 r0fuC 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 absolute poqi09k2wfu3i4av, +s ich8ge e-r( f7yy vsb7t tential 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 (chargey yfjj9u.)u9z7ecr w+ +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 necek*;j*t 4tq g :grkin*zssary to place three charges, each of 2.0 mC, at the corners of an equilatqtk: izjrg4k * n;*t*geral 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 ity gu+ii-* u0s eak(pt) is charged to 10yui+sg0t*( i-auk )pe0 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 pl ic4f94xicc) oates 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 are separated 8j;kcdbre7nkm0tuu h ,p0.y1z.y4inw r rs/ ;by 0.050 mm. If the capacitance is 17 u0 h 0jwp1 s;n.7ub.ymr;rin yd/e8 ktc4,kzr.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 capacito dy g wxh*i ilm+y(94xq1nk18 zmw +u5gz0xas9r has plates 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. ki iu-u2.;xsggp gipj4 bwb)m-; w6e3 If the potential difference between the plates is 2000 V, with t3b-bigu 2k6wgg.)p six w;j;4ue-pmi he 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 batt(mwr mgch5u /c59irl(ery. After the battery fully charges the capacitor, the capacitor is immersed in transfor5lgi(5rcr ummh/cw ( 9mer 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 on4fwz0w,we.fcm6em j ; a 15 mF capacitor. How much energy is stored in the capacitor6wjmw 4z0ewffm, .; ce?

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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 energcftx8m0u.d e,mx oji/5 im4:6hbo u0oy stored in the capacitorho mi 8/d5f uxx0i.j6muc04oe:tb m, o?

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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 ple-y0kq4g (y47f t+ ia93zrzimf w,gd0 -xqyzdates of a capacitor when it is connected to a 12.0-V battery. How m( qm z-zzifge3ytirk9 dg-q0,+fw 4ay704dx yuch 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 qc cp6 h9i*. o7bz3jagwq8k 9wis charged 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 plat0uc tzd o3-ezcr2 n+,jes 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 consists of plates of j dw67cnf :mm+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 consis iku0jrx+c1e xha-9c2ts 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 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 with rdl8 *:)(k1bimkla8 b,wvcty 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 p,a/8klav/ ux elate 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 tfitfj )9fc+jk 8j1 -awo a 50-V battery and becomes fully charged. The battery is removed and a slabj8ca )wfi -kjt+19j ff 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 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 ;wh+ /rbgiq ,abf 8ql-.3rxo ,ffocz (becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates ix;flb8f afror/q3.(+c- z,qb, ohgiws 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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