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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 vector?20adnd0-oih, qyaa. z

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulom(ihyz. mm0uy/j*)ays b 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 the0,p cl ytn9c,dobbo-u*sqjq-9k5 + j uir surroundings. Object A has ao ,nus9 q oy9q+-k c,t*jpb-jd50lbu c net charge of 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 b7,apjopug4 jb 0gs 7/uga-v*po0ux0 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 in a direction opposit/nqtt; )v,mnjy:*u8n f;s+kt q6jh ta e 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(+ usevc4:sv 2hv4x8( rqfcw n 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 tojwzd/sw:l5.y a speed v by a 500 V potential differenc dz. wyw/s5j:le. If the 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 arg itqlxl;-/ adwb-+2ue 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 equipotential fk7/ j /5 ym0hxyrdy(wsurfacd rx/k7 m5hfw0y (/yyje.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential sur.fm r inu60sv:face 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 5ccor ij0 271bb:yavi;x m3qeparticle carrying a charge equal to that on the electron as a result of moving throughc0jb:ra2ib5 1 vye7c qx; moi3 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 unirp axv ,ekkr-accdqb s*61+60t 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 con7/zycn zjx ;;rresponds 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 al)fnw d .2gsl)umg9;s t a distance of 2.0 m from a positive point charge is 100 V. What is the absolute)2ug w. m;sgsdn9l l)f 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 +;c1w-: zwsz koov xw+bd+aj) jhv79em from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same poiw+7:c1 whev ++swzjo-d x;9 jv boz)kant 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 0(npitmh.2op fx4 y- 2(ykykken a charge of +Q is located at one of the square's corners. What is the absolute potential at the y2f pnoy4xmyi-h p2.k k0tk((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 potentia0b-3 xkaauz*s3gj6 nyqzouy +04aw i: *npj4pl at the center of a square is 3.0 V when a charge of +Q is l+-s*j:0z0awbnua jpo3y4u qi3kpyz 46nxg* aocated 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 consisjnn3g ca)7..b i3 baqqt 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 arci3+9sde; pg

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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 respectzbu6e y8zlx80: nb87c9 fb jj4he)uun except that one has twice the plate area of the other. If the smaller capce)ubljb4 6 0 8zxzf8u henu8 :jybn97acitor 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 c 9 txb0idb3mnv7 6h c+qzsi4b*apacitance of C. If the area of the plates is doubled and the dixi0zs q3 bb+tidn h*v76mbc49 stance 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-plate capacitor fulb+mc0x40bc a ely and then is removed. The plates are immediately pulled aparb4 xea0m0c+ bct. (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 betr/xga 43qqz -cween the plates of a given capacitor is weakened, the capacitance of thatxqr/q4ga- 3 zc 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 v xp0+ktjfmsbi- hw :ti1+z4p;oltage by a battery as they are pulled apa4 +k; fm p1w+titz:xsp0 j-ihbrt. 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 maint 41 w2ddhuhic-7d5o-ok 5jjmbained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during tdhd-524u c1b 5jdj-howo mki7his 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 plnt,5qzc6wju pq25g7 lates of a capacgw5 6jlnqcq, p2u7 5ztitor.
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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 h fctnc0 8fica 8/u2d9is placed between the plates of a capacitor. What happens ahdc/92fntu88 fic 0cto 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 materiag v*k) jy/p.+ogfw2 opl such as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between the p/go 2p .fjy)gp*wkv+ olates?

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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 charzu 8oqv-gf 70c+twg +iged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge 0ico+7gvt wq+8ufg -zleaks 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 capacit9qnz dvz4djl d*;j*rai 0s0o)ance of a capacitor holding a constant charge causes the energy storz0*lia0*o vjn9qrddz4 ;d js)ed 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 the energy stored in that z1ea:,cxj9a ocapaci91z ca,:aje xotor 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 pe v , nwu/kxfhx,4l,i+1jms+ ooint B. What is the potential difference between poinw 4f+ eh1 mx/+ok,s,lju xinv,ts 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 electron from point A, where the potential is oe4(0yiq5ehf -50 V, to point B, where the poiq4 oh 0fe5ye(tential 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, isibj :mlrb t6*gu3/. nc accelerated through an electric potential difference of 500 V. What is m n:u6ib.l3r/cbtgj *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 e/xtiwtuz,i 9 5+.uod xlectric potential differenc wz5uti9uxto.x/ id+,e of 500 V. 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 p -;hzqs(qw-uxroton falls through a potential difference of 1200 V. What speed doesqw; uz-qxs (h- 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 V do in movinsli0;-o1th 3a:k:w; ,erd nfs v9 mwdog $8.5 \times 10^{18} \; electrons$?

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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 diffjqm4 w qo. 2*.ojfngqmmo*u39erence of 500 V. What is the velocity of the elecj2q*4jo*3g9wouqmfm. q . nm otron 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 acce.vq3a+wl:3kmlcj,h p lerated from rest through a potential difference, and afterward the ball is m, p mhk.:wcv3ql+l3ja oving 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 electrical potentiakr7pa cl,j4 2o6dd*h fl difference between two parallel metal plates separated by 1.0 mm. What is the electric field bel7 2fd,4*jo ap c6dhrktween 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, ise6iq zy,wzi 7: directed parallel to the +x axis. If tew:z y7i, qiz6he 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 din6w l,,, knssdrected toward the east. If the voltage measured relative to ground at a given point is 80 V, what l,,sk, dsn6w nis 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 3.0pot7(4 bc .zib V/m. What is the change in zt pi7(obbc4.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, are connected t8wuwv1b4ws bdg 3xui 4k,35bjo a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives kbib3 duw4 ww43x5gjb u,s8v1at 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 connected to a 12-V battery. A, -bf-h mft(3h k7drofn 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 energy does the elffdk m tr bf7o-,hh3(-ectron 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 battery.f3z5 sm /q2d,hqz ge.er t(nh67vlrz3 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 frolr vh5 7hem,6rz eg3z.n tq(23zd/fq sm 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 l:rdz g hi1(h, k,eciph t+);cN/C directed toward the east. If the voltage measured relative to glki1+,zgcidr :(hhep)h, c;tround 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 ea4mye-)i8br s),a//y eduanik y42uzfst. If the voltage measured relative to ground at a given point in the field is 80 V,s 8i)aeue/yb-m yk2z) r44f,u adyni/ 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 will acx td0u k(,g5i+u z,sjnbat**2 4qazpfquire a kinetic energy (in *4 2k ,*ita(+ut z5q0apz ndug f,bxjsthe 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 kuoe0 c9p5b:f3 sov8tdistance of $5.0 \times 10^{-10} \; m$ 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 vs);.k/f p:n+2mgtif3ski.fs4u p bkijih+9 stick. Find the electrical potential for the center of the m:g.4/fni9.v ps sk;uf++mi3pjhk f)b ti ski2eter 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 ty1 53hu-xk kgshe potential is taken to be zero at infi1kh u5x-y sk3gnity, 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, z)q-4 3arxsnr 0) 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 esrn-rz4qx ) a3nergy 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 char lgmixd:gp/98 ge is at (3.0 m, 0). If the potential is taken t ggm/:9lpixd 8o 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 placds3z8jz v i259pq accn:+p1.tnni 4byed at the corners of a rectangle of sides a and b. What is the s8n pc ztv nb.iz3j1i 9 q4an+:dyp2c5potential 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 artc4;oy*o* gr7xterw6 e placed in two diagonally opposite corners. In the other two corners are p;ce7o tt4r* *g xroyw6laced 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 +2e, mass m2ap wadzgab(5qs8vc q5 c9 81$6.64 \times 10^{-27} \; kg$) 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, 4f,uwi-b. fal*m,qq;b )r cws n(t(xgat the cornerl,gab-x( *wt.qcuf,q n)( msb4rf;i ws of 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 of a 2.0-mF capaci m n.7,vel t-aj/y(()ff0zsu +xa akxetor when it is charged to 100 Ve.an mx/sa0( k uy,7alf+)tf e(jxvz -?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capdnkx -wxdfmk1:nmld hvk +b*l-0 8*n)acitor has 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 capacitor is filled with air, and the plates are separated b)qib )yp22 uc, ;vxgugy 0.050 mm. If the capacitiv gy q )2;uxb,)2ucgpance 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 capacitcx 3qu k 3 h;s-9hiyk6)xuq:hdor 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. If the potentiy vl:tb2qssk.ui,m8 j a6e8mn22e .y ff 0oor9al difference between the plates is 2000 V, with the top plate at the higher potential, what is thebf a22.8 oy2e6fmn0m sr,:9 ik.e yjqo8 lstvu 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 capacito+drw7(49ha 0fh frpe7xszg )ur is connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersef hr4xwa7rdp)9zsu 7 h+ e0g(fd 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 15rre q * ral )7od5c5laz48-teh mF capacitor. How much energy is stored in the capaci r7l daqca etrro)h58 4l5z*e-tor?

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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 energy stored iniz5a y8 1jf4dw the capacitorz1fw8ij5yd4 a ?

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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 thevb,3 5y kp pf5dgp2gwm5a) vm9g7 e.qh plates of a capacitor when it is connected to a 12.0-V battery. How much wmh 5pmkgg epvgw25.9d ,ab5)q p3yf7vork 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 thahsodz. da2sia )z;5/,dpe 3 rv-9ioiot 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 ppn4r/qw p239pwwyz lf/-+f l ilates 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 *hu;5nfe xfa: 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 n(s be3-7 gk8szzp m6farea $1.5 \times 10^{-4} \; m^{2}$ 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 plge - fvve8k9s 1ing oub-0,3lcate 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 f xa vba8,w1p3area 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 coexc) uka(x0 1xmpdd, 5nnected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the platx) m1upck ,x(0dxad5e es 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 becomes fully c n.u*s)cw s4ebharged. The battery is removed and a slab of dielectric that completely fills the space between the s)*s w4en. ubcplates 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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