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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 ( lpmj a* d.d n+5n-eovoqy0.ba 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 bf5rztx/57h na

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objectss:d7zw jaf ,qktyo6 +, are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Wh,a zo,y f+7 :6tkwqjdsich 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 electriz :iu + , ;ffsobvsi8u3p5r:vvc 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 oppo))e 3ualf2tne,n ud y)site 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 conductiguh +h,gfqrjn ry 5)+(ng 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 av 6 ).l b)4o .kerzu,n0gcympg 500 V potential difference. If th) lyucz 64 )egk0p,.nbvrog .me potential difference is changed to 2000 V, what will the 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 is re - np2l;e rqkj dug7/9d 0wrkj6phe8s(at2n5zferred 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 equipotential surfavw3 ayz v/y++ s/.v:q ohbx+poce.pva+ q3o:o.w +y/vyxs vhb+/z

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mulbsi7 w(ef 4w7n unu2q)67kqjst 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 thepep2 -kwosp :p wqdyp::85 b;i electron as a result of movweo:ppp 8-q2p :;iw5 ypbdsk:ing 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 tcgp2t/+rqjmz scn1/ ,f( a2gunit 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 t/imi .s9x ctvi,px (;kg(c6tto

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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 i3k7mc :fo:)e :xarb pitm12npoint charge is 100 V. What is the ot:nm::ab3c m7kfxi 12pe r)iabsolute 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 negative point chxpx y9ntu3f(2 arge is -100 V. What is the yx t92fn(3upxabsolute 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 ax mm:xwe;h7* da0x:f ut the exact center 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 o7w :emxf0u:xha*md; xther 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 e(:mm qpzf,0 n4bo2zcb73hpz of a square is 3.0 V when a charge of +Q is locate,npe 0:ob z7(hbmz42 qpzmfc3d at one of the square's corners. What is the absolute 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 always consistfaj/ sppx,nx0x u2 1;o0 xf0ataqi2w9 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 amv 86bkp --ahg

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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 t(+rsm2. rqw od z/4hg :ihx*pevery respect except that one has twice the plate ar idw4+z/gx: or(hr*pqm2 . hstea 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 C. If the area of the pllvvtrg5-avt u0+ 2 y( ac:wiq+ates is doubled and the distance between ta(lay+:vtt 5+ qu- i0vvrg2cwhe 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 f1,u,g8d* dvft7srelck e.th 4 ully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What hap8t hd ek,c7td1ure.gl4* sv,f pens 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 capacitor is ws/mp7 z,k5fpk wc18b qeakened, the capacik1 kqc/ b7zwpm5p,8 fstance 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 h3odoayy2 q e8h.4h,yr7m -wkvoltage by a battery as they are pulled apart. During thi,d7yk.3oy 8o2mhhaw h4y-qers 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 voltage ba; h(vjiqg;fd9n ( ez/y a battery as they are pulled apart. What happens to the strength of the ele ;9f ihdvq(/( en;zgajctric 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 platex +)i +5fft8jxg6 77 llmfjdazs of a capacxfazmjlf )6l7 58 fd7jtxi+ +gitor.
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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 place8i, (avboemr /ak-b;f d between the plates of a capacitor. What happens to a-v ,e/obrbm;k ifa 8(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 pl z jjo v0pr,s97x-jpdsnx v-.6aced between the plates of a capacitor holdnj -rjjx ., 6p-vzsp9x7o0svding 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 fully chargez.(bus4 paa q5d. The capacitor is then qpz(a.s54 u badisconnected, 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 holdm 2zys:y 7.rii66;gdcu,ikmj u / a(qking a constant charge causes the energy stored7gmq/y ;,u iicr6z6:jumdai.k s y(k2 in that 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 thf gvh* 5num/ //qaqzk,e energy stored in that capac kfh,zqa//qg5/u*m v nitor 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 charge from point A to point B. What is mjc9(od pz8p: the potential difference between points Az cjomp(9 pd8: 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 po1 k3 l(a+mtkliint A, where the potential is -50 V, to point B, whe3ti l(kla+k 1mre 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 at rest, is accei ngc7o nf8lmxyi) fh05f:5*zlerated through an electric potential difference of 500 V. What is the kinetic energy of the ph f nnlmf z8*5: y)0i5c7gxfioroton?

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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 accelmn1irp) mxc89erated through an electric potential difference of 500 V. What is the speed of thexmp m nc91r8)i 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 wdz.y1s9;9 jb wx5pgj tkd;m /difference of 1200 V. What speed does it acqumx g;ywdj9 k1dw 9./sp;z5bt jire?

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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 y3qxt gyriaq69:kl (e9e 7 lc.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 electron is accelerated t:8+cxoz1 xiv;4/.y bny zurnfhrough a potential difference of 500 V. What is the velocity y8zzon.c1/;u4n ifr+bvxy x: 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 onrj 2nvfs .7c 6ehg)6abject 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 dif.cg6re6vnna hs7 2jf)ference?

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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 electr(* lqkji a(nfi7kua n-ttn4:t4o77uuse q-p( ical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field betweenu( q :nqin-7utk7sln( at4 7p-( *4ujfaeikot 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 directwujvk :zp ,a+,ed parallel to the +x axis. +,zpu:wka ,jv 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 directed towar8pfozsnj0z dt:/we- ( d 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 west oe0jwz ot/(d-fnp8z: s f 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 a zv98wv ,ygj.tbx ,czwc rv195long the direction of an electric field of magnitude 3.0 V/m. What is the change in kinj1r.yt9 ,w wcv9vg5, zzvx bc8etic 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 battery. gqq 7nuq 9h7 z. ,vq8koz54icc 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 posgi9c kqvuo8 , hnz745z qqqc.7itive 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 connected to a 12-V bat3f ;w 9jbfy1txtery. An electron 9bwftjxy13;f 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 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-Vtvic.k / uyun5n6 8qk9 battery. An electron released from rest at a location 0.10 m from the nega9 k /n 6u.8qkit5cnyuvtive 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 x,di tx q*tuz7 ud;)0yof 50 N/C directed 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 dirt,* d0tz 7iqd;xxyuu)ectly 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 electricwwu nnz9;f7n0 field of 50 N/C directed toward the east. If the voltage measurwnnz;0w9fn 7u ed 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 potential difference of 12 V, it wch by 9hho8vr 09d9sr1ill acquire a kinetic energy (in the absence 1r9 0rhyho99hb8sv cdof 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 ofslmaq x e:.tj1(uv+) o $5.0 \times 10^{-10} \; m$ 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 s 8t5waox s6n; 0czy.tmp0 h+2jf ri5lttick. Find the electrical potential for the center of the meter stick.f8 y am 6.cjt;x0p5 ih2wo5l0rn+zs tt

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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.ur)c jgxdkxd b7:q*3 .0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.0 m q7j x.r*):bc xgdudk3)?

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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)t,zkopmq*ng:a664f+cym 40ame4msb q1 r v* q 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 e44c6 q,fq yo4zmga memrs:6 kt+qvp0 ma1**nbnergy 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.a gh wrj2-.lf9uy d0j-0-nC charge 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 uwryjahg. d9j f -l2-0infinity 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 c1 ,i6+wn1iffss 4 gnicorners of a rectangle of sides f+ n1 wcis fnis6,1g4ia and b. What is the potential at 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. Charges of +4.0 mC are placed in two diagonally ocw5fe c-l0h-z*ws8n a3fh;wfpposite corners. 8azfwl cwe03h5cf*;s-wf-n hIn 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 (charge +2 d ng6 03/kgg-v+fbu4b ijxoi2e, 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, eackl d:-c ylzg/8(/dryvh of 2.0 mC, at the corners of an equilateral triangle of yk-gv (zdlc:r8 dyl //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 i:0s0j) lh naltoa unuin:i:ux3m y9 (*s charged to 100a)* nlhx sn 90:ijt0:uu l: yn(aoimu3 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 :0-w ov/p jw6bj(scn*x,ehqdof 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 h1qoh-,2x a:jm/g*rgo uo- h g)0cu ifair, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what iux)gu of-i 0qgjhg,hrh /2om 1a-c*:os 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 h)p3,uji: gy vjas 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. If:.sh8;,w4 8 kvwjas j .mf)*rinpebkz the potential difference between k8j, wpi.;m8k.a v:jbzsrhw s)n *4fethe 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 capacitu r4+hecg3sa8 p-wy;vor is connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transp 8 yu+w4gs racv3he-;former 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 storx1 4t9jlp v2wdx7egs9ed in the capacitor?xg9px97s jvetd42l w1

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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 acrossem2u-uh* gedyos/q:gbc- tc 4)l w2(m a 15 mF capacitor. What is the energy stored in the capacitouccuey( o4hm-q2/ g tld e)-mb*s:2wg r?

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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 ejp;h * pla:c4gi)r)zc+ ev)h capacitor when it is connected to a 12.0-V battery. How much work was done in charging thhc zep virjp)c+gae):* 4l); his 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 so5 /rsxbdde4h7w:g7tw 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 capacith(*gpfjq5 q9 l /mz:baor 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 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 platesijg6krflgbz;scf4 1tb ;2f 37 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 consis q6udr+v:w/ yb0qtn y:ts 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 conszda 1-:pj zcc(2espn49o , kfa6wxz-ktructed 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 constructednwg;k+z 6dv ,2gu hg:rddjn5 2 with 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. 4z0ia7vhr8th The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectri zh80rah4 ivt7c 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 ch1s bwlbeost2l jvr 3y7;-tn3i9t 9 j(marged. The battery is removed and a slab of dielectric that completel tn 7we19bi;mt-3 3ols(stjjyv2lb9ry 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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