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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 buafipeh; +b 6c4bqs :* vk62wis 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 7idqb));b3tu- g5 /hir pwfub 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 objectsnc5*uv p/ 5m-d nb.8l:if yxd.zw/h va are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is g5m wv5lyn b.. i nhdpuv/zfadx*-8/c :rounded. 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 ela1ok9c3 4 p cxp*cm4zoectric 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 ;7/aa wgnxm)9;h6ypqo o 9obdthe 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 pl5y yscpi1)dp 7aced 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 q7+qjg 9;h jcbu*7u 0 (qf mp5ga.fayqto a speed v by a 500 V potential differ;qhamqy a5.7gu0(guj bpq *7qf fj9 c+ence. 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 are at the same potenti90wye1zeau slg*yt :: al 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 poie/ (qeprksc*9dnt8ig1x ho 87*z,akw nt A to point B along an equipotential surfac qe*thwz a/dn ksik9 op78(cer, g18x*e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must be3xz (h*p8r-poqizn 7 q

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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 o48he 5t -9sourw lnho0n the electron as a result of moving through a potential differe lo0owhht9s-e4 r5u8nnce 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 uz(dsn2( uj, fa 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;c 5f za- 19mi;smgcyx 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 pn,h wpir(6 k3 i)l(sxvositive point charge is 100 V. What is the absolute potential 4.0 m away from the same point char( hlnx)wik3(6s ir,vp ge?

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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 charge:2d7 znf0vyp m is -100 V. What is the absolute potential 4.0 fn0 mpy7vz:d2m 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 when a chalk e0m-yat 8wr 962mxytf;r9 erge of +Q is located at one of the square's corners. What is the absolute potential at a60xyrwm-elfyek t tm99;2r8the 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 potential at the center of a square is 3.0 V when a charge of +Q9pm5d r*jz + grfv+ejxk 0au() is located at one of the square's corners. What is the absolute )5jeuvmzp0kf j9++xr d(rg*a 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 consist rcyy4u. ldw1.joo -x: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 9nzos4 vgs 7:pg*db8 xa

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate cp2e.-kp;ept gapacitors are identical in every respect except that one has twice the plate area of the otheregt;pp 2.e pk-. 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 1ehzrq n 82h;hof C. If the area of the plates is doubled and the distance between the plates is halvee ;h8 h1qh2nzrd, 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 iv*j hr(7 f1tdn mqdc3h)r+ fa2s removed. The plates are immediately pma3hcvd 2t( *fn+j) h1rdr 7qfulled apart. (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 between t-g 5kqvxk2: dgh+py 4whe plates of a given capacitor is weakened, the capah w-v xp2gk5:dyk+ 4gqcitance 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 )ttf un*(k.n wcapacitor are maintained with constant voltage by a battery as they are pulled apart. During this processuf )tnn k*w(t., 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 capacyv+ 0 w3/k,xoyhjw)e ditor are maintained with constant voltage by a battery as they are pulled apart. Whatwjdy hewo 3,k+/ x)v0y 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 material between the plates of n0 n;knc:t9 * pry*uhya capucnyk 0 np*;th :*9yrnacitor.
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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 placed between tq3tmq1/v 9gbk he plates of a capacitor. What happt/bqk3 v9gq1mens 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 s4kk1(x o*o 2:akn oriluch as paper is placed between the plates of a capacitor holding a fixed charge. Wlki4on arx*k 2:o(o k1hat 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 fullt ldsje)wx +49y charged. The capaci94st)ew+x dl jtor 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 capze.q 7nel a.v6acitor holding a constant charge causes the energy stozlav7 e6. e.nqred 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 capacitpiq7crf6 hsd6 4,- )ljhx f,lqor causes the energy stored in that capa f7pr4) ,hfqcl-6hsjq,dx l6 icitor 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 energ)15)rw hg lkem*1ge wtpllbh z;l ,7*gy to move 10 C of charge from point A to point B. What is the potential difference betweeh7lh rlww1g gl* ;b)z,p*l)k51tg e emn 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 electron from point6i n83px +vwszpcc*8 g63ufyo A, where the potential is -50 V, to point B, where uz 6 3svo6cpnf cg3xwi+8yp*8the 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 accelerated through an elect:zb vhn87uvj l.* fw32gkkn. tric potential difference of 500 V. What w27tk l3 n *v8.fujnb v:zgkh.is 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 restxcx0+f3 qtqtq )u30ex , is accelerated through an electric potential difference of 500 V. Whxqtx+ 03t x 3qcqufe0)at 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 proton falls through a potential difference of 1200cj 4x pbe8.3/cvsf58gf z wsr9 V. What speed wrcb. 8gcz s34f9f 5jsp8ve/xdoes 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 movifd/3uxe mu*mcu/in5 :pj +s3 qng $8.5 \times 10^{18} \; electrons$?

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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 thrkrb* 1x+wsh+zjt1cuaf4q d3*ough a potential difference of 500 V. What is the velocity of the electron 1*tuz3hcdxbkr+*f1 qs +a4w jafterward?

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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 8brb8 7ycxp1z gmy z7y-ftd k-::ukd +mC. The object is accelerated from rest through a potential difference, and afteryd c1 :8:uzy k7prd- ym b+-8fxbzktg7ward 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 elb h;*m(md)8 zbi7wgp uectrical potential difference between two parallel metal plates separated by 1.0pm 8iguw;b m h7dz*(b) 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 fiel:okh ieb; 3i2q4sr 3og83 ixjid, with a magnitude 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; o:r3igk3eij 4b oiq82 shi3xal 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 wy l7uqe /w),qfield of 50 N/C directed toward 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 of that poin/ulqwy7qw ),et?

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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 magzz14aq 8*vw ezhw:* 3lnvf ghbt6yp*. nitude 3.0 V/m. What is the change in kinetic energy of the protobz1 tvf*ywqv 8h6z.a*w*lg4z pe 3nh:n?

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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 s j6si7v*oon0w4r m4mconnected to a 12-V battery. An electron released from rest at a4 m0is4*v7n6jw sro mo 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 connected to a 12-V b;i it 0.2xkxrkattery. 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 energ0; xkxrti.ik 2y 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 batterysx 87iwkqhk5o1 2rx0n 4sg,cy. 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, what g,k50ns 28qi 1h okc7rswy 4xxis 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 elect -i;4r8btit4(p picso ric field of 50 N/C directed toward the east. If the voltage measured 8pr;ii4b4s itocpt(- 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 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 2 uug4gb+:l vpvl -*mlfield 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 direg+bmv2u*4-:pug lvllctly 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 willa)*l wp8i etv ew3 ()agq.r7oh acquire a ki)ow tawe. e *(iglhr)qv3 pa87netic energy (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 odjg hbw ew*d2.2ay oy*h /*y:spie::e f $5.0 \times 10^{-10} \; m$ 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 ar,gdycvn:w vyof f- h,i5-c+ fwl.( * rvqxh+g9e at the ends of a meter stick. Find the electrical potential for the center of the meterv(ff,gynvf 5vdlw: ,orc h+ -i g9qy+h.w*-xc 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 ) 3 qf/.paqou;9g-tciwdu c/vcharge is at (3.0 m, 0). If the potential ii gu ouq-/3vct)qc /p fa;w.9ds taken to be zero at infinity, 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 16u 0gu8ux8lf1rc n 4e2aawn/n1fwux, 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 electriwul011 enru/8 fxf2gunuax 418w 6 ancc 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 (q fn;zp7 t2 eza8q)s3i3.0 m, 0). If the potential is taken to be zq3q8ifp)nta7z ;z2 esero 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 placed at the vfww/ :t),rg mcorners of a rectangle of sides a and b. What is the potential at the ce rf:v/)tgm ww,nter 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 placenzz*c) v+z3v l5cmgo3 vup 25sd 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 in thzvvg5zz c 3*v+)mls25oc3np ue 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 +2kpavu(cqlqjj1 *x jx 1r xiu48u46u+4 e, 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 mCc*m,f r10 e+owh fz8y8 0qtxax, at the corners of 0e0*rx,+z 1 ofq8cyx aftw h8man 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 -wa na(:bsgk :ntve3) plates of a 2.0-mF capacitor when it is charged to 100g nwt(v)ba ek-a 3sn:: 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 of area.0 5 mdkyfewsfxlg z,s6zb/6 ; $0.50 \; m^{2}$ 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 capac ke.,:aig5gm+fd*y vw2 i)nkjitor is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate ek.+5i wyk 2gvjmnafgi):*d, 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 platesyj(l hrce )4l/ 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 tbult*a c4wu -tv05x-t he potential difference between the plates is 2000 t-0w bc-tt45 lua xvu*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 capacitor is connected across a 100-V battery. After the battery *uw: g*i( 3qvw;sgn*mvx+a nbfully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge ui+(wq sn:ngvg* wx3bv;m *a*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; ,c j4 gn2:xmnmv2yzp is stored in the capmy nj4;vx2g,pm: n2zc acitor?

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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 in the capaf.z9p 51:rpnh-g doazcitor 1:drzfhoz-ga. 5 9ppn?

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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 capaa qt+)3i+2hqp/fku f lcitor when it is connected to a 12.0-V battery. How much work was done in charging th+f +a)i/ufqpl23 t qkhis 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 thateix ;6e4rb i8nbkuhp*m:b- z ( 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 pla 6 t.lu(wib pbdo1+q-cm85 eqetes 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 consisn;/sq1bjpc 8 xts 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 c/nhj, 0fyx7otb+ olw3onsists 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 cdh;tzd8 3zv(6 3)xiisnp 6zaq onstructed 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 with plate arep b3 ro2x1v5qqa 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 bategp-ysw 29m6itery 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 ca2i6wsmp y -g9epacitance 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 battvig27 i5weo t1+t0o49g n;hr +jhdrqsery 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++5s9rw2ihohqtg1 gj i7nter0dvo4 ; of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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