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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 vec1c cwdl. u)1nhtor?

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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 aafgh9 n-oi y-hfz vsn3.u/.7- e ff/kk

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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 their surr18 dhm707i ml w6khaga,yna q4oundings. Object A has a net charge of excess electrons. Object B is grounded7a l64k mh,a 8 1mg0wanqi7yhd. 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 electric jqi qoy4dlm10( /ia;pqma6e a dr 2/z-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 the electric fieldvqx0u+uw zp-4z,ku r,

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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 hollowj0 ik+mjt/ui*xq *ys*m ;s7+anmf /d v 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 .qq8v3z)qtukrzsl5 dd(6tm ,accelerated from rest to a speed v by a 500 V potential difference. us568d ,q)t zkmzvd q(l3tqr. 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 ar-xbikc.6,mn xugk xc*f 46o-7zkx1ime 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 tlygspq 2b,k6h 4hybu) 9,+nnxo point B along an equipotential surfacby h),+,phg2x knq69nl4us yb e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surf,) yvyuvp(l:guatf9 +g,b1 cnace 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 equal to 29lqikhe 6q ,x./vn xute;7cu that on the electron as a result of mo29 6.qt;c u7hvk x ,ui/xeqnleving through 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 uniwgn2jwb8(e/q 0x)k. n2c -dht*yriv xt 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 corresponafw4 m5 shw+q89veg s,-+6wv pjyg;rxds 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 dist5ebi+ dxl.h/,/xv tw vance of 2.0 m from a positive point charge is 100 V. What is the absolute poten,vhev/bd/xt5xl+ . iw tial 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 m from a negative point e--b afdd.qc5iycv +5charge is -100 V. What is- f5q+a bd-c5vdc.i ey 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 center zf r/a/mf :v-;o xiiq-wrfh;) 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 cornefrv/;-om rfi) ahiw:- /;fzxq rs 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 squq abfl( ;g pm5 )pqbp-a/7g fu:w)ko4pare is 3.0 V when a charge of +Q is locat4p )-)w;/blf( bqgpkqum :agfa5p 7op ed 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 consist of two charges that .js ; nabee q5;6yh5hz a.5arjare

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per voltm7q* vq5lqsav0 4zhz. 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 hx+l f,l.kady ;ss/+uexcept that one has twice the plate area of the other. If the smaller capacil d,u+yhfs ks;a+x l./tor 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 capacita-(ukg;o1fjs vu0.e qd o,x2ab 03 pnaonce of C. If the area of the plates is doubled and the distance between oe(kj3s0fxuva2-o1 0 g, dpo.una; bqthe 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 capav1on- s8hh r s)75wlff1o,kdlcitor fully and then is removed. The plates are immediately pulled 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 b)1,ohw5s n shflrf 7 kvl18do-eing 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 a given capacitor is py 7 fi0 jqmkkn)j187dweakened, the capacitance ofdfqk p17k8im j jn0)7y 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 parallxdjb8z 4x2e 1fj cia-zzb334gel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During a4i xfzbz-j c43ezd12bgj38xthis 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 maintained with t f- 4m17.jsptjo: uirls/u2xconstant voltage by a battery aj7/-j:ftls2 tour. u pmsi14xs they are 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 ma;x q x5t/1vbkrcg8g ms9m zu6h1hys8 )terial between the plates of a capahhc9xrs/)kg uqtsx m 11 g8z;ym5v 68bcitor.
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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 ll m.:-v6m vknbetween the plates of a capacitor. What happens to the capacitk-l m6 nl.:vmvance?

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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 cahodewn4wq7y)q 4 y+9 mpacitor holding a fixed charge. What happens to the electric field betweeqdn)q+h 4974omwye ywn 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 fullue9je6-4 hjz v xsb,z3y charged. Th6s 3 hezzjx 4veub9j-,e capacitor 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 capacitor holdhcag 8 :-ij(*2ghry6fm *wvdd: e0xvb ing a constant charge causes the energy stocvg0:2jhe ddg:w f*8(vm6yr i-x bah*red 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 cas 2f,jc**wqmcuses the energy stored in that caq*c2*c jsf, mwpacitor 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 t3c0b gaxwkl6i;da2, 1fy3pq/ quk4 ymove 10 C of charge from point A to point B. What is the potential differena wkyt13 pbi,2u ayqcf6q 40 gd3lk;/xce 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 movzywf0p31tjig 9(6m ising an electron from point A, where the potential is -50 zmiif9t w3y1 s6g(p0j V, 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 qcy8w//7/ d mjp*qmj jcbji0,rest, is accelerated through an electric potential difference of 500 V. What is 80j / jw/cbmy*jj/p7id,mcqqthe 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 acce 4a3 -xna8gpaolerated through an electric potential difference of 500 V. What is tx4aa g3opn8-a he 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 protoc-i4n/k: pb zwn falls through a potential difference of 1200 V. What spn- 4p:iw /bckzeed 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 inr+ns zzly)+( m 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 i 0-e0guw 8vd ,h91iyxuwukguf x* t/lavsb*.;s accelerated through a potential difference of 500 V. What is the velocity of the electron afterwah .8 fvxwl; g/v*ik tb1uu9 y0ud-0xug e*,wsard?

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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 frr wmxa7x4h3kbga16w kmp3 u0 ;om rest through a potential difference, and afterward the ball is movmh14ugaw a036kxkb;p7r 3wmx ing 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 difference betws(ah b*:3b73pxm ylg*dr9 or oeen two parallel metal plates s h 9bb337*gy*doaxsrpom:l ( reparated 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 magtkt3ke2l7m4o yvahn,,o c3 *g nitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0eo,v3c,34kgao *tm7 yn2lk ht 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 elepz1jcvzeg2qw 2 ae-buo )6c; 0ctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given);2ew c6b govpj-a z cz0q1u2e point is 80 V, what is 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 tho jcyfq9z(.l0v6e16 d hygc *ie direction of an electric field of magnitude 3.0 V/m. Whatyfo0*z .g(c ej hl9q 1dcv6yi6 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 t6p z+a2 xxhgb6o a 12-V battery. An electron released from rest at a location 0.10 m frox6p6g+xahb2 zm 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 baezsd) nat1vt 7a6mx44-+f1 bgp i*fkm ttery. An electron released from rest at a location 0.10 m from fzx7*sbk +4116mit ed apgtman-) f4v 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, areq,:g dzyvcx(49(ltie connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative (cvdle9z :x yqt4(,i gplate. 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 directed toward the east. k)6ac 25apdlav5k k,c If the voltage measured relative to ground at a gickk)55ka2 dava lp6c,ven 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 e-jx cy ,in2 zwv1a5w4N/C directed toward the east. If the voltage measured relative to ground at a given point in the field aj,5wx1zv4-ne 2wc yiis 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 through a poten+dh5sea uh4(foe uhw-kae 1-)tial difference of 12 V, it will acquire a kinetic energy (in the abs(fhaae5u- h1w su)-o e+dekh4ence 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 f3 j g 6u5u5ulfn,yl,-wzh+n6ns07c ;mvth bt 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 stii; -i ig7(yp2j0d7ejwf*a x hvck. Find the electrical potential for th27;eiv 0pjwifgxj(h y * aid7-e 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) and a -2.0-nC charge is at (3.0 k5 ocfu y + acs6 g;.8j3c6ryb1hz gzn5m9*enpm, 0). If the potential is tazakgfsmr; b.9 8e1gc3cn5c +phj66 ou y5yzn *ken 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, 0) and a -2.0-nC charge is at (3.0 m, 0).:.*-gl 14rz s qrn 2ywqxvzfefpkr -5( If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4.0 m)?q *kryzz1vxlne.f2(rw--g fr45 ps :q

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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-nCl jkpgylkl4 +b2q0x 7rdz,sg7v4:h0i charge is at (3.0 m, 0). If the potential is taken to be r,q7xpl dz g hgs4li07:bkkv2yjl40+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 placed at the corners o0yw0u:czv l8hf a rectangle of sides a and 0cw0h:v u yzl8b. What is the potential 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 pla6dlt3h) *d*i ngkgb4sced in two diagonally opposite corners. In the other tdgkg*ndt 4b hils*6) 3wo 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 +2e, mafm cayr, 7:jpr18su(z8sue +ass $6.64 \times 10^{-27} \; kg$) 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, efa: vb9x:e(zev kb0/z: n8nayach of 2.0 mC, at the corners of an equilateral triangleafe:b9nv(vzz :0: nxkebay/ 8 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 charged2c7n5m(n*iaj2scxj/clmdwe-; a iu 1 to 100sx 22jualia*cdm5( jc/w;nie1cm-n 7 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 2i.pl ojx/8oj /i,vku 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 withtt-vhwc4yjjw9p) x u.u99 m.o air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate areatwvujo99).9uw -p yt .cmhj4 x?

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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 ,) 3oydrru;(.l0ik m-gbki in$0.20 \; m^{2}$ 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.sn wqt)y/va qg.90add8 6 nv-e If the potential difference between the plates is 2000 V, with the top plate at the highavdvy .q0qgt)6ad-s 8w9n e /ner 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 connkk 1ue3.lyy+ hected 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 ady1. luhyk3k+ editional 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,/ f*bzh*jki3 cejei-citor. How much energy is stored in the e ji ck,jh*-f*b/3zie 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 1ns 5*os(f57zh7 voq ve5 mF capacitor. What is the energy stored in the capacit5vofhesn7 s*(o5v 7zq or?

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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 plate +*r dpd9:slcuodn2/ss of a capacitor when it is connected to a 12.0-V battery. Hd9 cu:*p sd2rl+ond/ sow 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 charged so that it storegdhr no(i2 4;a)6mgcns $2.0 \times 10^{-3} \; J$ 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 capacitorai;m01hp.q;u: j 9o zqr qtw5r 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 consists o wjm)u84s nnjnx is/41npq,)yr5iqo6f 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 capaciogle z 6g m9*gqq2,7jktor 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 constructed byk dz*kzd6lq 2wr 23+a7g.hkh3ig -swith 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 cr;xdgss0c*b 9 onstructed 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 becjr*i(m.fy*h2fs v s9j kr*1ytomes 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 capacitan*jf1hy(2sryj mfi.kr* 9v* tsce 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 chwcvbx4vij g. f-21 .h*k wsy:larged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectrwfs l2 kx 4hy.-c .:j*ivvw1gbic constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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