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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 i9,pth+cyo.xmev 2 3l+9vbp yqfb; f 0xs 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 98jy vtwo ; 2oz 4fq d0bc:zi3(rgph6ais 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 imo(r :idl f/i:nu: sk)nsulated from their surroundings. Object A has l:d):k:io( r u/nmisfa net charge of excess electrons. Object B is grounded. 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 fiel x+wm)ckjfd)2d

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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 fiell u:h1rtl yf64d

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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 con4y e5jjx/txc xpm7 p m4v6 o ;k;ipi7y,:i5xnfducting 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 o+pc .5ak am2vtw2z3f a speed v by a 500 V potential difference. If the potential differencoac5k+ f t2.azv2pm3 we 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 j/- g; /za 9-8sax3arv xo);aacmabdi points 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 to point B along an eqtfm) no6da *z0uipotential surface zo0d)nta*f6 m.

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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 :qo9 ,edw w erf(/m;kcbe

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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 eq)bk+d-o2cqbs p tp*1bl5 rh+ oual to that on the electron as a result of moving through a potential difference of one volt is referred to a+*b2q1o p )hrts c-lbko5+bpd s

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electron-volt isxgk1*wj i )o7d 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 correspolh. uxw 63obv-nds 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 of6yn gj,nl8m 8r 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point ch8mr ny86l, gjnarge?

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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 is ys,jwd 4k 1hymg:,e9gzr:)*cx x pb9l-100 V. What is the absolut94::jg ,slr 1, ) 9kmgedxyzp wchxy*be 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 of a square is 3.0 V c3uha: jz:ar-3e s ,ntwhen a charge of +Q is located at one of the square's corn:h trc:3 ua3j es-zn,aers. 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 7 o+xj v:htpr/o,z5wxcenter 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 pz,7xpohrxv:5 w/tj o+otential 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 (eal-c/p 0h 1n jqtj)4bc 4mknthat 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 ctx3y opw n))j26m-q) 0wixdd 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 ide3v(b:1rau l gjntical in every respect except that one has twice the:( 1ba3lr vjgu plate area 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 capacita2 6z o0ip:9l0nw1fuz xov uj4pnce of C. If the area of the plates is doublvjol9wu f:io npz x0p0zu12 64ed 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 parallee9gfckm;o6. o)jgq( c, -namel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant g-;)ceg k.oe6q amfm9(no,cj .) 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 a given capacitor is weakened, t h j+t (zo0cd z5:m-ysh.zznj(26zvbvhe capacitance of that capaci z2v( oz j0s(ty+:j.6hvz m5bzzn c-hdtor

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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 voltage b gcwp8)ey9dv k 6g*da+y a battery as they are pulled apart. During this process, the amo+dea cwg96*g d8 )pkyvunt 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-plv)4 i)eksc -;g,c- -k6e-farxgw pltgate capacitor are maintained with constant voltage by a battery as they are pulled at6w-, kxgcg)r )g - s;ilkvefe4a--p cpart. 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 between th*+dbf3axm1qyumafhg d+ can3l z( );-e plates of a capacitormbd+aafx dy qg(3 n)+3-c1l*am fh u;z.
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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 the plates of a capaciu)b;uk m)c;rrov.7jr6u 4k dktor. What happens tkjvrr6;.kmucb4k;ud )r o )u 7o 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 placedyr)3 *bmwb+yk between the plates of a capacitor holding a fixed charge. What happens w*)+bbym3 ykrto 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 oo/ -p gf5u s8nblw2ofpa6*e2is connected to 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 in 6/uo 2o sfb 5gn-pp2f*eaolw8this 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 holdin ef4zj+snt-icel zu1.35 ;r apg a constant charge causes the energy stored in that capacitcee unf1p4i. z rs+t-l5;z3ja or 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 capat); t/j7ds4fhh8m f9gyru5 fl2 vy 6/ ftzru:tcitor causes the energy stored in that c86tt2fh y z u49gf ;rhtvfm5l7/ tjf:/)udrysapacitor 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 zc(r)cga 9y5dqflx ,;5wy /bbto move 10 C of charge from point A to point B. What is the potential differex5rqac;l (ybgyb f,wzd/ 59 c)nce 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 elecfo: q*gook0i1i: .ea ntron from point A, where the potential is -50 V, to pointfeo:k o.:1 iao* qg0ni 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 throug-f f*wac)r qu* ic r*0c4ej55ao. xvfoh an electric potential difference of 500 V. What is the kinetic*c 5o* r- ej.fcavcfw4ai0 *u xo5)frq 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 g4cv8lw-yp i+;+ wtz oc ke+2mrest, is accelerated through an electric potential difference of 500 V. 4vmcw2k+to wz+ l8y icg-;e+pWhat 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 d/9zyb:z:q i;:kb 5i9 ukncjt yifference of 1200 V. What speic5::bb9;/yqznyi k t:zkj9ued 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 e./ f2 zhv4ckrk,nih0g 5:mvu 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 thul l.;drefeo* +p1ty2 rough a potential difference of 500 V. What i;llpe1* . y+fre2 otdus 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. vki xg pg,3 3ce,/61 yvdeuqw :*ga/gcThe object is accelerated from rest through a poguwgx ky/v,c *gde/gav3:e,3p 6cqi1 tential 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 maintains the electrical potential difference between(n;ixlm 0qshqc t5 .z) two parallel metal plates separated by 1.0 mzmnlc;t0 q(si )qhx.5 m. 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 magnitude ouxrx8dj f u*n3fb oxh5/1l 9.yf 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what i 9f*5 8xold3.uhbu yrx x/njf1s 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 electi80vr1wo x)t/ (rxdw)uetlf 2y/0 njtric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given poi w/)xx /0il ywfvtt(tu8d 1ero) j02rnnt 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 the direction of an electric fic- d g0,mtn3kmeld of magnitude 3.0 V/m. What is the change in kikdtmcmng 3,- 0netic 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, separvf,l4,s/ j-h7yvdg wm ated by 0.20 m, are connected to a 12-V battery. An electron released fs dg-fvlwm/ ,jy,h4 v7rom 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 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 9vik3uubw)+jj jx- irwr9-w ; by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the elk jj-i 9)jru9wbix;- u3rv+wwectron 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 conncqzt1 8.2nn xvv5wa8p ected to a 12-V battery. An electron released from rest at8pz8 aq1 .2tnn5vcwxv a location 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 field of 50 N/C directed toward the east. If y8a2y ye hqr22the 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 directla2y yh 2rq28eyy 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 e1m tn0zbbcma .k:km/ 2ast. 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 mm b0.b 2nzmc1tk:m/ ka 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 t6lwu-+,/*fa:bxois k 3nzvo ouf+f *h hrough a potential difference of 12 V, it will acquire a kinetic energy (in the absence of friction)+s :u -xoo3ukno6li ff+waz/* ,v*bfh 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 disfx1bex1ys q fdbh r+t)(3 4qk:tance 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 amq8x1 udp8a iped(h)/t the ends of a meter stick. Find the electrical potential q /d(ihx1dp8am 8)uepfor 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) and a -2.0on8mm(vco9t9a+q2 vbm x .2 we-nC charge is at (3.0 m, 0). If the potential is tak9 oan9. vq( +mo ve22c8mmxbtwen 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 m8eoqx(5m 0ow kpf(d3m , 0). If the potential is taken to be zero at infinity, what is the electri 8(5qmfxwk3od(p m0oe c 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 (3.0 m, 0). If ths s ;+ymnmt;:fgz,h.2r4 tyhk e potential is taken to be zero at infinitymt +tz: n2 hmr;.h,;s fk4sygy, 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 rectangle of q dl znq2r.;5ggh-,h 8of 8krmsides a and b. .2hgflo zq8h5d-r;rg,8qmn k 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. yowa5re ( 0x9pm c c0;k5/chmkCharges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absompw/0k5k(rc 9co;mx5yhe c0 alute 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 +29xh yq *yihs++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 thpzj6u4- fqyjc+oi4 c-ree charges, each of 2.0 mC, at the corners of an equy 4 +czqpjco i--4ufj6ilateral 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 capacitoaj whgpd 5kn zw in/hx97l3:/2r when it is charged to 100 V7n :jxpdiz/2w9h/hkgw a n35l?

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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 areyi+ 1- xi6ui)f2m qo*ocqzd*qa $0.50 \; m^{2}$ 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:.w2jdss17z ivn mp -k are separated by 0.050 mm. If the capacitance is 17.3 pF, wha7d -kpzmjn2 sv:1swi .t 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 capacitorxo .ss+3 vp-czqtb81x5pcg )m has 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 sepae v7 6q+2 mm7wg cd17/gqqk jytl,nlr*ration of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between m c1lgmy,tqew7qkj /72n7*r6qd+vl gthe 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 av 4.6qye5w4fg.j.fe akl y1ck 100-V battery. After the battery fully charges the capacitor, the capacitor is imme q..vf5clkeejak64 yf1. g4y wrsed 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 capacitou:5q. kx lzzo8r. How much energy is stored in the capacilx8.o kzquz: 5tor?

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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 mh4 bx+m3aym t1F capacitor. What is the energy stored in the capacitomb3 ah yt41m+xr?

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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 8 o dm:sgu*jzjn q/8:vof a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this cap/:*sd o8j8 gm:q zvujnacitor?

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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 store8*w d 6uhei jaz2te1- w+vk: wbq6f2iqs $2.0 \times 10^{-3} \; J$ 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 (,rn c tq,) npdnexy)xj/- r-mh thc:2z k+jn-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 of plates of ub*+/l* r8v/pwrb 7nh ins j -k:csio/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 r99r 0hk:o+g*wwqhv:no+tyh 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 plas2k*, h:od4ddgz8+u w.g u ekmte 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 capacioi*i/ 0j+odfrkvks.z- io8v )tor is constructed 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 b4.fco0iu1 e)vwdnr 4 vecomes 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 0vwe1 .4u 4v fr)oicndof 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 a 50-V bark5 roi+q 5c a(f+ee*fttery 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 i5q++ 5( rfk oeare*cfis the voltage across the capacitor's plates after the slab is inserted?

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