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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 a*z5.9p9z vj7 a cmz+ x+vtgebnot 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 is a:r0 nxak8y0b y

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objec webrfd9j)egg5*6v8a ts are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is groundebgvfe6w 9ej5 r) *8dgad. 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 the electrih mk+dx:bs 1)vc 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 directio0 .hrm)et w4wkn 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 placed otyio-o m g8km/ba+0s xs3ko65 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 to a speed v by a 500 V potl8x lyuv9w;5-fmj., bdwp jxs mg7y,. ential difference. If the potential difference is cjp5lbg8 .ymu,-w9xm jf ;ly.dxw s,7 vhanged 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 points0sp7*m (sswv u 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 t 7*y7vus1pl)n3w7wyz8rbkeeu 2m p)y o point B along an equipotential surface.u73ueyyskw7b1pl*mnz p 8weyv) 72)r

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus rw9ved-+;eu pb q)d/rt 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 partoo hwzu+6y)f /x3 d6x2f glvw2icle carrying a charge equal to that on the electron as a result of moving through a potential differenc6v6fo xh zw+lwyofg/x) du 232e 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 u yb+wnp4,fed ;nit 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 correso hnc4 933fvcpponds 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 from a positive qg x6pdtw09nmn10 hz1point charge is 100 V. What is the absolute potentiald90qtnw6xp1 1hmng 0z 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 0om gk kpkb o7(8lpw8.at a distance of 2.0 m from a negative point charge is -100 V. W(ok7kwp8k lgo08 m.bp hat 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 centu p8o a.l8;ufas l(7wxer 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 other corners is also fillaw. oa8ll8u7(u s;p fxed 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 whetcm(i(7 z2er c*az *lsz(q4 bln a charge of +Q is located at one of the square's corners. What is thl zirtqlcs47mz *z( e*(2bc (ae 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 alwlux/r oo(n)j ,rv lm )b2ll),eays 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 i5 *nwgooabjssc8i *i0f; p m2/s 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 identicalkbb,9lc -edm / in every respect except that one has twice the plate area of the other. Icb 9me-k/bd ,lf 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 capacitaf/-u.;: rohzj oxx4x1z l sog(nce of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capacitancl :.u/xjoo(h1 f;sxz-z4rgx o e?

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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 isuu+o u-s7jl65 4w rbpc removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains const ujbo+up4lc7s-5wu r 6ant.) 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 betweznz ohn2 rebx237ic y5nz/ r48en the plates of a given capacitor is weakened, the capacitance of ter2zc r8onhin3yz zn 45b2x/7hat 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 voltn svy55wuel *(age by a battery as they are pulled apart. Durisl*eu5 5 vw(nyng 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 maio5n4 4 ,g,vp/ahbhqtis- b)f jntained with constant voltage by a battery as they )jhish5-npo4 btb ,4q/v, fgaare 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 ndz3om mw-rgo7by6 ). material between the plates of a capacitm)b7.ozryo -w dm3n6 gor.
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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 p:nlkp3 . b aa2dkrp1w5aper is placed between the plates of a capacitor. What happens 5k 13r nwadpab 2k:p.lto 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 plates of a capaci0cfmo9*a b;; r6xj koftor holding a fixed charge. What happens to tf;60bf j* amc9orko;xhe 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 anoi+pr(q5 mvkp,*b 6js d becomes fully charged. The capacitor is then disconnected, and the separation between thebj qm,5pvo*6pr+( ski 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(ebo1tbtd3pn w3p3 xjr,02a r a constant charge causes the enetpb2303t brr1ej w3,o d(npaxrgy stored 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 tha ; a3 fnao/vzt)tc6 cm/2kyr3st capacitortc r/a y/3kfs; at3zocn6mv 2) 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 poinod k wsohl3+,8w-x5 ;/ubvvb kt B. What is the potential difference between povo /u+swx v3d8 ;kkobw,-h 5lbints 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 poinm-ca ;m 7o* afsei6d1wel0 3ljt A, where the potential is -50 V, to point f03l61*7ea i-a; cm lejdws omB, 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 at rest, is accv cn+8c1f ly+oelerated through an electric potential difference of 500 V. What is the kinetic enel1 8fync+vc o+rgy 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 al u*v/sj ;qmp,ccelerated through an electric potential difference of * su;qpvlmj/,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, aw(2 ; +ohh5uxjkh.mcww -+zvxc6 o4fn proton falls through a potential difference of 1200 V. What s wu kwh2c jx.-xmoo4wfh (h6n+ z5c+v;peed does 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 movxun3)7 b p-zm z.i8 kd6r(nqai4 ndtz6ing $8.5 \times 10^{18} \; electrons$?

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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 dx99/bvpnykewqsx 4 5 5ifference of 500 V. What is the velocity of the s5x4 5ew9nv byqxpk9/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 accelerated fromdqr c mae:;i04 rest through a potential difference, and afterward th0qem4acr d ;i:e 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 electrical potentiaw, 4b(nytbemo5twlg-xkm d9x16 b * 9bl difference between two parallel metal plates separated by 1.0 mm. What is the electriclb,w-kb64 e b*xd9xm9tw(n b ogy1t5 m 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 directed phg +n+pwrv , 7 6vxf:0b1tztub4pce 5harallel to the +x axis. If the potenthur v5+z npwb7v fgp+4t1:be ,xct6h0ial 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 toward the e/ k.b vcpjw 8)zb9hb99xgz3qrast. If the voltage measured relative to ground at a given point is 80 V, what is tvcbkrx/ 99h bpj.98zw)b3zq ghe 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 elecij9g5q,25qwf nw8lcr tric field of magnitude 3.0 V/m. Wfg wj8w59n,cq2i lr5 qhat 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 by 0.20 m, are connected to a 12-V ba8t50o w1ize vowm*8a sttery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distantow*8a8s 05vwoemz1 ice 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,z l ov* oqr;82ofv8m2a separated by 0.20 m, are connected to a 12-V battery. An electrz8 lf2;r2aomq ov v*o8on 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 d6h f 0.g ke8bc*7vkcxcx5: hvby 0.20 m, are connected to a 12-V battery. An electron released from rest at a loca7 hb6ec8cv0xvxk ck.dh 5:f*g tion 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 fox8dpq5ni,bz66r 9 nqield of 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 directly east of theiq9xqn8 np,r zob5d 66 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 eledjda8rf ( (nf7vz4mt 6ctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 8f f6jvm(t74zr d(a8n d0 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 differenmgjmw/el fl2/0vs-7 qal5l7t ce of 12 V, it will acquire a kinetic energy (in the abse jml 2 5fl7 vl0a-qlsw/eg/mt7nce 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 diugca0(7 zo2/-x spridstance 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 theae-r1 7y sabc1 qxn9:k ends of a meter stick. Find the electrical potentir:abye nskq1a-9 c1x7al for 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)k i+6q mrz 7;hwn; n/x)hrdpo( 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 drmni ;k)x(zrhp6n7; q+/hwo 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, )es6y 0pukp4l 0). If the potential is taken to be zero at infinity, what is the electri euls6ppk)y04c 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 charggcgm l45q+k-qh).fq txb 76k je is at (3.0 m, 0). If the potential is taken to be zero lg7qkmqj.k+cxb5f )4gqh -6tat 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 9bref 5yyfrq*j )*r*a rectangle of sides a and b. What is the a 5 9rryeryfj*)b*q*fpotential 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 op)duj x: st)gjxrtmh r ;(f:0o 714bjz(ftxlq/posite corners. In the other two corneu 4s tg qrj::z)h0ro()(1jfdt7/x;x mjt xlbfrs 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 +u r37t3p,lf re.t-kpo2e, 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 k-n9d nk0 .uc.j5heo ethe corners of an equilateral triangle of sik.0.hknn od5ej9u- ecde 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 ca 1mbz4c3 4ffa7w yvh.ib 1c3ulpacitor when it is charged to 100 V7l hc.v1iy3w14azc4 f bbu3fm?

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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 of a:s)sf9vgkxo, .e a*g prea $0.50 \; m^{2}$ 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 separau x -esw)wxh ,jb42ds:ted by 0.050 mm. If the capacitance is 17.3 pF, what is the plate area- 24w:d bje,sx whuxs)?

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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 plates of area zc(uv: u -gr-z$0.20 \; m^{2}$ 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. ev 6z:5qwy4 yo If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric f:q5 v4yz yeo6wield 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 ct.( xehoup.; k7hwphr43wez(v -ktu.onnected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows(kze.( thvp wer.;xh 4wpt -7u.uo3kh 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 o) n 2dm+bd.ofg(ify,56t eu kvn a 15 mF capacitor. How much energy is stored in the capaciton)u,dm .fd6( gv5eyibktfo 2 +r?

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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 capac 4l5l.b-pvr pa7i2rztitor. What is the energy stored in the capacit25prtzbi4l. a- vprl 7or?

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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 ont+6ab*78 ;fmn l 84qltg *mgi ekgiew/po the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this cm/ * gneqbg*6 lf;8 pmw7lteki4+iga 8apacitor?

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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 charge94gl/zw mctvt e13iy:du,t, n d 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 co .vxb 5tn8o6einsists 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 capapxpc9kv : ec/ f.oyvl:gxjx) f29nw*(citor 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 arqhyxypc d3v,b 3:e4my.e/u*s zu t1ask 3k; j7ea $1.5 \times 10^{-4} \; m^{2}$ 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 wxbuvo9lyd: m6 t5(;pf o(cb3 qith 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,1qpc;b wo6q df $0.40 \; m^{2}$ 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(2qra/;payzq5mo ;k j 50-V battery and becomes fully 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 is the capacitance oy(aj;zr/;aq om25 kpq f 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 und( 3 j0jsz)9df87i4aq. .fkuncq jy50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that s 4d.zfnjf3807u) a.diqjkn 9ucq(jycompletely 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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