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习题练习：Physics Unit17: Electric Potential
本习题练习试卷来源于51fly国际课程 (https://51fly.win)， 为试卷打印版，您也可以在网站平台(https://51fly.win/)直接 访问本试卷的在线电子版并查看正确答案与解析，搜藏保存任意题目到收藏集。 访问方法: 平台首页左上角"通过试卷号快速访问"输入试卷号 75，并点击直达试卷；或浏览器地址栏内直接输入本试卷链接 https://51fly.win/test75.html  教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。
 作者: physics  发布日期: 2022-08-15 14:49    总分: 75分  得分: _____________

答题人: 游客未登录  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 iudo)hp9ha /sju/l.j 27zv u1f s 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 s c6wj3ba/) bmis 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 t(f t; oal27xhtheir surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which f 2h7lo;ttxa( 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 electric fih;n 8y g x(+:v( bznv/fgz4xvheld

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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 sdcbec4 2/avm 9u5-ppto 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 conducting sp lh kyey(*z.y4here. 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 s20 o*hadiiel0z6 q(r speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed ofl(2sdir *00izoa h 6eq 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 p5 yczdd: 3 h/k0oep:photential 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 mok9;,u,ss 4ogtchl95- i ees -tngxez 4ved from point A to point B along an equipotential surfachn49u 49 ,lee sk;g-sc5tgxit s-zoe ,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 va9g osvk76/hyuh- sq7o 3zbl6:evz0 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 a charge eqhip,g 2t, z-:9ie.utr bn kku(ual to that on the electron as a result of moving througie:hbp.z-un(k kg,9r u2i t,th 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 unit oj7;vc7 ufmn/o /x fhc4-scy;if

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspon8u s 2 ncumy9xr:xrq50ds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentiji4m)(fw kbrs x8,o+aal at a distance of 2.0 m from a positive point charge is 100 V. What is the aj)k rf(x , 4ib8as+owmbsolute 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 au2m6g,9 rt m g*dowzpri(7bt) 6tvk3x t a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point chargdg 3t t*2kvmtzwigum(rpr6 6b)7,o9xe?

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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 charge of(a st y t;q4(zv(0qmym +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 filled with a 4 q tvq0my(tsy ;m(a(zcharge 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(h,r28 tjqgt i5do4pcy+b n(n 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 whe5+n tt ,iqh( ybg4 cjprd8no2(n 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 of two charges that are9 wumci,npd gg0 8ok1b,;n(dp

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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 isw k7kd8p4 0pstg ke+lhr.mu84 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 identical in every respect except that n 4u/xg+v64 aw 7bbhyx t/c amfehn,0+one has twice the plate area of the other. If the smaller capacitor has capacitance C, na47w4bfxbnm +ygh, u 6 c+hetxa//0vthe 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 capa2k5t+y::e xjv3 xsvs qsya87(r lw;vz citor has a capacitance of C. If the area of the plates is dz3s:wv+r(ax8tj:ys2s7 5 evx;vyql koubled and the distance 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 fullyl:ub-m-y.x3n rsqzx/ and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) :xzq-nl-. /3 yrmsubx 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 the plates of*1 aq;b;g xxd)xpg an/ a given capacitor is weakened, the capacitance of that cqxga /x )g*d;a1bxnp; apacitor

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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 paralol64y4p4s bi4 v m36efpnjck6 lel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the p6p 64p 4c3 kosnvbe4jy 4if6mllates 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- qel)/-s8aov9s4tw r lplate capacitor are maintained with constant voltage by a battery as they are pl4qsas/9)v- rloe8w tulled 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 material bevff.7joj*6bytfzp+ 6 tween the plates of a capacitf z6 v76t*bof+fyj.j por.
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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 asz;zn6:ny;r jc0 0zzrx2bl fk + paper is placed between the plates of a capacitor. What happens to the capacitanc zc0xbznz;rj+y26 nrf0 ;z :kle?

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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 avjxt+ , vgdhl3 .am.0u capacitor holding a fixed charge. What happens to th,gmu.3d +t.vjal 0hx ve 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 fulc do9f4c /:6 lgvfa.zely charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaka/.9f l:fzegvc doc64 s 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 capacitancb:82 nt)z 6w5-mnklqv7h rikt( rxy k6e of a capacitor holding a constant charge causes the energy stored in that capacito8 lk m n n7)(rbzxti-6 t6rkq2hy:kv5wr 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 stoi8*xiqdvm1 j1 +z 9zxsred in that capacitor dxizq 98jm +zs1i1*xvto

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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 t9jzsd6 yvb: -gb/i+n ho point B. What is the po9bsb+h6-iz :ygv /dnjtential difference between 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 point A, where the potentiakypn jx ,7dzqx4 ;mfi/x/*j)il is -50 V, ; mx/qp xk ,fxn4*j/7yjiidz)to point 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 at rest, is accelerated through an electric potential difq vbv -2s:zlo6ference of 500:q26vz-ovb s l V. What 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 rest, is accelerated through an eht3o.z a( jj:54e pcgwlectric potential difference of 500 V. What isp(3 ea.tjcgho w:54j z 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 differsco0obn5y 8b3bb g;h*ence of 1200 V. Wha ;0oh *3syb gnbb5bc8ot speed 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 Vz+o sw1hevx:1/ onh twj;s21tl l4ui2 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 ax k7emp 1(vcn9z3 shr5 potential difference of 500 V. W37me vck1hnxp 59rs(z hat is the velocity 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 object i: zo1id :kaiw;s accelerated from rest through a potential differiak d:wz;i: o1ence, 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 the electrical potential differenc zw;vpx;tp7 m.e between two parallel metal plates separated by 1.0 mm. What is the electric field betwe7mp ;;.tx zwpven 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 pq k8qr6f ab*-of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what isqpb6 ka*q-8 rf 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 ficdw ,hv i(f(z8eld 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 v ,8fwd( hci(zvoltage 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+x2u/v widfte t703ai .0 7uaitvd+ 023/w ftexiV/m. What 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 batte2 ivsrbm cf 0qh;iq//5ry. An electron released from rest at a location 0.10 m from the negatis ;m cirib5f//q0v2 hqve 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 conn:ec 8. 2w ywqw4d;ihh 0zmr0zrected 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 energy does the electron gaw;qry rwmi:dezz24 c .h08 h0win?

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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 connect*xp5yr9tazgp *l-soqk g:5 p +ed 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 pq-g9p+p:lag zrx5s5*k*oy p tositive 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 electr:1 vw4oxywae, ic field of 50 N/C directed toward the east. If the voltage measured relative to ground at 4e,wx1wy ova: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 east. If q6icv:j )smdq 3;. b*wdm(kxothe voltage measured relative to ground at a given point in the field is 80 V, what is the voltad :kw*xqmscb.6v (i3oqj;d) mge 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 dj;l96mzurgf,ghfop44 a u/ +difference of 12 V, it will acquire a kinetic energy (in +,jza; /4f 6fl4o9grhgumudp 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 atzp6mzzdwm e +5tf4on;t /6 qcik-ne/,tx+ ib* a distance 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 stick. Find t qa7d:d )s0:stj/qm s)/.g x1jshaat qhe electrical potential for the center of the meter /g:ht7.j sqa)as 0qd st1d) /sj aqxm: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 the po pj d9sp2 zolgc(czp7x; dfi2hjt8,*1tential is taken to be zero at infinity, what is the electric potential at point (0, 4.0 m9i lp 8, tp2fo;gchsdp jjd1z* z2xc7()?

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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,q5v5ha tjxy8n4a r1k1 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 potentialj a 4xqn ra1t185vkhy5 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 f bb+, jyi iyhs9jb-,)(0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is j+sy-i9bh)fbb , yji, taken to 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 placew djk5 +e1p:hyie39ila 2wlw*d at the corners of a rectangle of sides a and b. What is the potential at the center ofeyieh29l1iljwk 3w d5* wp:+a 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 pl lrl.(pbf+qi0j* ;rgcaced in two diagonally opposite corners. In j;li ( .fprcqg+0blr* 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 h1-)od ioyo; jqmm;o(ev8z:q +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 necessary to place three charges, each (b+grv+c bk 1cof 2.0 mC, at the corners of an equ+g+ 1b (kvrcbcilateral 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 it isw86czu,rt t4k charged to 100tt,z8rwu 6 kc4 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 capacitq)x.gw *z /opfor 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 witjgo, q hv519rnh air, and the plates are separated by 0.050 mm. h 5q 1jov9r,gnIf the capacitance 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 capacitor j .u kpp,rp4-4u.hopshas 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 oq em2l-kcl44 r+viedg.sd+nr+2f, etf 5.0 cm. If the potential difference betweei+k d+2 2+vrls .megd ,4-tf4rec neqln the 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 capacitor is conpt(8lolylwjo+ -e *cf, x y4t4nected 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 xf,opj*yt c8w(-44l+ t o yllecharge 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 stored iil fos281 s+rln thei1 osfsrl 8+2l capacitor?

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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 c4sjdssn 9 ir-3, 0lnjwq7m9 heapaci,h3le 9d0s-nqr9mjsiw4 j7 ns tor?

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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 f s4ns46xuhl:q lows onto the plates of a capacitor when it is connected to a 12.0-V ux4:6nqslh4 sbattery. How much 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 is chas,ps w,q 8lktq+v.h( orged 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 plates of xz2w m+1 u( lbun bd,dl-:qbdh,*6zacap p c49area $1.5 \times 10^{-4} \; m^{2}$ 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 consg8njc5;cnb 2 4u:s.gish0 rc nists 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 capacign)d wc-3yej1 tor 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 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 construccvupsp20o-, cted 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 consq b(qf r/g vdpcalm 5-x3q84+zwz e4s1tructed 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 fu )0jnjp *sug;k*syu b3lly charged. The battery ij*pg; nuk)u *bj3s0 yss 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 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 cvi3po 3 3x/wpdxb.re 9onnected 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 plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's9xw x3r b/epdp.i3o3v plates after the slab is inserted?

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