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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 lo;yyx. *u sy,1db7jc 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 isytiy/y 2k(0 op 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*i/ppi,f agl 5 their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potential? i*pi ,fg5al/p

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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 f 5enm/0t:bm+qhj l; tsield

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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 o unogod.b:a ,2;nmbz 7k6/bum 3k(fgnpposite 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;kzw.ts n lzgc0i q0qb7whk*w -( a;*n 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 reshd sg8-m 1i.kbt to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball beb8mk1 h -i.sdg?

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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 r8:sq 5 tdtxb(w1lg5rf 1g*) sgwg6jgx eferred 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 al).uoju 6w w6jkong an equipotential surface.j6wowj) 6 u.uk

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface t wjmt f-z :;i s-8zyg:m9h1tbmust 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 equa, lgy d0(q1w,ihqzk( fl to that on the electron as a result of moving through a potential difference of one ghl1y(,0qwd , fikq(z 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 xvdw5wid7 :aj7oz p+- a 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 correspon8usf o0;)zfn- ew1r(h dfyk,ads 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 point * j i75y4xptotjt8i t37zf pb5charge is 100 V. What is the absolute potential 4.0 m away from the same point chartjbt y5 875tit 4 3pp7xfoji*zge?

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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 if) clie ;(7q5a5a gfdcz)pq5as -100 V. What is the absolute potentiala5qq7 a;gz )f cfeipac)5(5dl 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 ce8gl*7ia; fyp pnter of a square is 3.0 V when a charge of +Q l*afip ;p7gy8 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 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*mrj5k9:3,xqsxwm ln 3w/ vul 3.0 V when a charge of +Q is located at,mxwl5 m 9ljwnq /rkvx u*:s33 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 consist of two charges that arbfybvq jb qg(.kj :;/0e

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per voltb7 3 uyod1sd2x is 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 7f 7.,kxni,losjfvm8 one has twice the plate fnl 8,.so7xfkv7,m j iarea 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 t7jdxt7u1 m ;ythe plates is doubled and the distanyd7tjtm;7 1x uce 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 fully and then is removed. wu k7rx hic25: The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on tr25w ck7hxui:he 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 fielujek)fv +d7qja n2wwac1 3j-5d between the plates of a given capacitor is weakened, the capv wc n2+a)71fjjj wu -qadk3e5acitance 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 vol bs0q4s d*hpl,tage by a battery as they are pulled apart. During this process, the amount olbhqp 4s 0d*,sf 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 akpea*km2fva.19 hgn)vir+1 capacitor are maintained with constant voltage by a battery as they are pulled apart. Whata* kk.2eni1vfv)gh9p1ra a +m 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 a h.dv2 og9sy(;zjo 3 ywcapacithy.od9;zw j3 syg(2voor.
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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 tq9irb6wf h8)2+jj wlkj14yct he plates of a capacitor. Wyh6j9lk4r+1c jbfwqi2 )w jt8hat happens 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 such as paper is yxf-* /)6d )f 4k(uaxju4iidz p vorw+placed between the plates of a capacitor holding a fixed charge. What happens to the elec dziwxp4r*4k6)f(uu- d)/+yj oiav xftric 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 ts. h9 q ysei9g20vquw46r +knwo a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored inw h9yn0eki4s.v 6uw9gq2+rqs 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 a cow (dre)tc7mlzi:n u. 5nstant charge causes the energy stored in that capacitorlwe7z n.) ru: c5tdmi( 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 gip(ox4eb6e;qe . 0 lpcxven capacitor causes the energy stored in that capacitor 0;xxl(.qpeep 64ceob 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 jyv,ftz+bp63sa7u jjaqje)(m3 *a 8tto move 10 C of charge from point A to point B. What is the potential difference between points Aa v6my +etsb*j jt 3aa(qfzujj3)8p7, 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 Ahxl1v o2ekg ):, where the potential is -50 V, to point B, where the potentx:gl21)h kvoeial 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 accelerak +cm7l,wmj*n)kwick a.p *2 xted through an electric potential difference of 500 V. What is the kinetic energyjc klwinm7.kw,p )2+* ak*cmx 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 electric potentian/*xdx jeh v9 at9.y 9k *+gde0zowt1al difference of9gx9a t*da y9jnx+ *t1dzeo/.e v0kw h 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 proton falls through a potential difference of 1200 V. d9fbc2dio0 i5r o/8w u What speed do9 0oi/2bc85fduiord wes 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 ktd uc:jt 8*j(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 a potential difference of 5:)z3,p lng5z 5 ;eycfp68cpyzkyict) 00 V. What inzzp ) cgety3lz;,6fk8y:p 5cy) 5 pcis 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 objectia pp( k g c4-mkdqb3s 66chbf ddt6nzx/,7a46 is accelerated from rest through a pk4d6am(pd,k gsha3c74/nqc tx 6bfp-b z6d6iotential difference, 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 maintain8, dcswm.+oo ns the electrical potential difference between two parallelscw,om d8no +. metal plates separated by 1.0 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 field, with a magnitudeo*)h yyzn)w umr);: xy 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 :y; yr)x omwhn))*u yzpotential 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 fie +y 3bv36aylvild 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 1.6blvy v3a+3 iy0 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 3.0 fun/p -s )5myzV/mys upmnf5z) /-. 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 con)aidy7 *euq4 mj 4(blvnected 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 1.50 m from the positive plate, what is the potential difference between the initial and final e4ujmqla )vd4(ib 7* ypoints?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, j,di;eb8a by.separated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a locaibb8;d yej,a.tion 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-V battery. An ec9*gg px5*nyqb;x g )llectron released from rest at a location 0.10 m from the neg9png)c xgx *5gbl*q;yative 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 of 50 N/C dirp/, s 7 zl yzb1pizuh0v95j1vmected 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 dybphpzmljz1z ,1 v05v/9 ui7sirectly 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 dcij(i x792xqkuy r jb.w)9md8irected toward the east. If the voltage me)w qik2ry.ix9j(cx7 b md8j u9asured 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 throughqis 3rh(y /vygwqg;*; a potential difference of 12 V, it will acquire a kinetic energy (in the absence of friction) ofr;(q gvyqs;wiyh g *3/

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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 distanc k-vgr j2(ds-ejl- xfd1 ckz,/o3-aj le 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 the elw5qyhxkk0ar,th h7w-a 9 a 4)iectrical potential for the center of the m7h -w5kq4khi, yaa)r 9t axh0weter 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 atzf+;o3/ jauip, 5/wzwe qzgv4 (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potent p3gfv+/ea4 izo5q,w;z/ jz wuial 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, 0)58 b+ 71y1,vgpmg glqfdemqt0. If the potential is taken to be zero at infinity, what is the electrm7l,vd g1gp bgyq8q 5f+1em 0tic 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 (+sia dem+1 sy00, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to b yesi+d1sma0 +e 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 8 mzxhpznowf17 q: 7,fcharge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = z,h1fq fnxw :p7o8mz74.0 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. Chargez(z5.mjdzr 5tcc13i) nd, ej qs of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of (tjm cjz55 ,cidez) .nz3drq1 +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, /g6akjc*idbwh77f 1fmass $6.64 \times 10^{-27} \; kg$) 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 chqy7 y/e-p -u 9pwamcp.arges, each of 2.0 mC, at the corners of an -qppamp9-e/7yw uyc.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 capacitor when it is chargeosx7 , cei4am+o 6xi/pw.ir 9md to 100 V?.p r a/ 6e,4 +wim9cmsxox7iio

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacit ndmov3tghy5 /l9s 5p+or 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 wij7* fa e6luuc/pnnehn, zk2. 8th air, and the plates are separated by 0.050 mm. Ie2 .au6 nul7c/hk8enpf*,zn jf 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 has platelyzc6u+/fh3tg q ar /4s 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 potxec t:w 98,d17nxa)o 7oyca mmential difference betweeyo xodctc a7nme9m,8) aw:x71n 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 connected across a 100-V battery. After the batt jye. g/yx+hqtl7c.x.oytj(p18u o*bhb hy)9ery fully charges the capacitor, the caphxt*olugy .yye b+jxh t)(o8 79y. 1jq/hc.bpacitor is immersed 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 15 mF capa el,udqyz6n0z6;8b3 i 6cpswj citor. How much energy is stored in the capacy eb8wcdi6,6n0; pqu63 szlzjitor?

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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 caphc0gb1/ lw1xzacito/lb1 10 hcwxgzr?

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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 g b:f4vjc ly3 ni+.2mpcapacitor when it is connected to a 12.0-V battery. Hvgcji3b2f. m py+:4n low 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 a qw8.u+ fug-1 knl;tgis charged 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 capabwjf7c1 wkdq4e1j .)b 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 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 c d/l3s)byo/pc onsists 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/ wuozn61 ,dguwv5h*xonsists 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 constructed with plate as2oif iyp5,y8 rea 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 constrsntn l qnhw+ v-ab3rj )i773w,mvrg,3ucted 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 connectwwvr;4/7we kxgsa, n.ed 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 plw 7rw/xw4nv.e ;g ka,sates 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 a8g)poxtyv;sm :.uw -gv1tc 4f 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's plates after the slab is ing:;x-u mfv8 vp4)t1syo .cwgtserted?

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