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习题练习：Physics Unit17: Electric Potential
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 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 is not8b6*x ueth;x8l v,pvk 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 is 8vngr;0 ss fn9a

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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 fro 18v ohl1xleb76lzl ujcq*65um their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at luuzh 6lcb*5168 1leqvoljx 7 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 th+*qb40shgqfyx 6-g:) tha dige direction of the electric 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 opp 9ysk 6itra;s7osite 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 on a hollow conducting sphere. Th2mnzad tx 45e(;1z5(jyfpw euey

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A small charged ballii*4s vq,xjim+7;x vd is accelerated from rest to a speed v by a 500 V potential difference*ivq4mdx7 xs+,j iv; i. 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 ;r6;k) hzn8ugk7r vtcthe 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 mow6u0ta3 cxup t di;p3-ved from point A to point B along an equipotential surfac 3c;awiu tdx0pu3t 6-pe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface muzll-r*-uprm8h + ,cxust 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 particlefbxnsg;d g(4 o)m )jbi8o72pc carrying a charge equal to that on the electrodcbi;jmxbs8fo2p )g g( n o74)n as a result of moving 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 unit o9zxvgv (k.a 3 l6wsnsdd4v)x8 f

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresppfv5z8 (8 nhqnwuu 1/fonds 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 chysjwxq o z ..y:s)-*r/a9h kkharge is 100wh ah)*qy:x k.zyk.rj/s-s o9 V. What is the absolute 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 at a distance of 2.0 m from a nega7tz / 2wi2ep()xan vcxtive point charge is -100 V. What is the n/2xev2 )tzpcix( aw 7absolute 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 au-4nykkp;- a ,pp(7+f68lqyo p7lz5un d bsmft the exact 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 when each of the other corners is also filled with a charge of +Q?mknsf,kyp q6 5fy;lzd48 -o up7a-p 7ulp+b(n

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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((e z5 iqkcig) V when a charge of +Q isqze )5ik(ig c( located 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 alwa l0kv/dpl:i;a9ge s k2ys consist 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 a)8fnvcf/j9 (zdm3;xh pcvaa)

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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 8uz.1q aw )pr6.jhjur oc1*rs:cq ma;6ie2tg identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capo8j z6gsrm:ceu2qtri. p;ru. 1w) a1 jh*qc6aacitance 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 the plates is/+r 9g1c zagon doubled and the distance between the pln 19+gocza/r gates 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.nl6wd2nf t9klw ca7)( The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the pln)awl7( d9 2c tfn6lkwates 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 the plates of a given capfv8 ybjekzk-8qo p/ra10o s8c0+m7 amacitor is weakened, the capacitance of thzqkvm/ e rs-80a18j+myc7fp8 boo ak0 at 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 volta7lp +vqt 6ckr z*t(g- .vte8a+so fv2age by a battery as they are pulled apart. During atl.c+2* +7k -ft8agproeq zsv6vt(v this 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 withbi8ttsexp6 y j9c700 duh2dfnm90y: c constant voltage by a battery as they are pulled apart. What happens to the strength of the electr0n2iud0 y9xy6j9sfdt 7t e8c0 pbm:hcic 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 pl raj1nlxe8*)to uk+(g+gn :aqates of a capacitot8n+):rkg na j eq*+u(oxg1al r.
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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 plah3 :va/( hewnpkdh7 +vy0p (kwtes of a capacitor. n3 (vwe 0pv:d7wkyh(pkha / +hWhat 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 pl uraw7/h-e ls-+t(vczaced between the plates of a capacitor holding a fixed charge. What happens to the l s-+c7-zwv(r thau/eelectric 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 capa7 t esb)tt4, nuh.kr1rcitor is 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 storet7.k ,s4rrnt tub1h) ed 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 capacitancog-ylr ;jrfl1.x1/ ; zyuaiw o1hs7 x0e of a capacitor holding a constant charge causes the energy stored xao7 jlr.i1 1lh;x 0ry f;z1ug- o/ywsin 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 causes the energy stored in tham5/4l9 r fitrzt k5ty.t capacitor t if5z9 t/t4.tr 5klrymo

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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 i.7,r rp wp n-th3vtw /jg58vtA to point B. What is the potential difference betw8g vrv p5/wtj- tp trwih7n3.,een 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 potential is)n26 :pn 5e ihdd.qwbn -50 V, to point B, where the potential is +50 . dwb5n2nqh :)end6i pV, 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 potenti tby* c) )pe5n1( 0kpw,wlxgtial difference of 500 V. What is the kinetic energy of the prol,xn ))e0kwgi wc 1tp(*ytb p5ton?

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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 thrpz.0pz ,jnzrn f-8y 3gough an electric potential difference of 500 V.z,jn8p. p- gnyz0 f3rz 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 ipp lj :k ii) +2b703wpj-6buhv aume6V. Whjp hj:uvk-)0 3i2ibl6 6pebu+wipam7 at 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 V do iwh(6 l ts a3-j8*unsyhx ;n/qln 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 500 V. - rwdwp;b6z+ u/1 tazfWh/ z 1wwf -6;+dupzbtraat 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 is a)x ( /mxunf8whccelerated from rest through a potential difference, and afterward thm8x wx(/ )nfhue 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 differeb jk7z01 b9vec6edbl2dz wyvy t8u64 7nce between two parallel metal plates separated by 1.0 mm. What is the electric field62ut 7d4l cwvze6zb 1yedb bj87ykv09 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 of 500 V/m, is directed parallel mwil hn18o9,sgyo -h 6to the +x axis. If the potential at x = 5.0n m-hsg,oihl69 wyo8 1 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 electric field ozd g:l:p kfy5*f 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 th*kyzf5:pl g:d at 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 9glfds d74el1electric field of magnitude 3.0 V/m. What is the change in kinetic energy e dd1gfl9l7 s4of 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. thkc0/-vte(a 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 electron arrives at a distance 1.50 m from the positive plate, what is the potential difference be-ct/(h vaek 0ttween 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-V1)ghesv (--xrmq )hfc battery. An electron released from rest atc)-1m sfx -(hveq )hgr 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 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.y:dzaz o z/a5dg ,bi72 An elod ,257aya /zzgbzi:dectron 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 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. Ij3h5-mu w6j2n +k ooxyf the voltage measured relative to ground at a given point in the field is 80u- 3+joowxkyjn m5 h26 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 towa-(ag5;bkax1b *hj:x coz o)a saf6e5yrd the east. If the voltage measured relative taxg 55o -by*h jo6 (afac;)zxbk :e1aso 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 through a potential differ72. /lpzzhwi v o 0 -fkihl(innn-m8e;ence of 12 V, it will acquire a kinetic energy (in the absence of frictionown8/nnfmvz07zi;ikli hl . (-ep - h2) 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-ok3 (t1nbkci 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. Fzgvw j )nifj*w2p,3 h.h egh,6ind the electrical potential for the centenjh)3p26zfv hgj*, h w iewg.,r 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, b: bf1 6a7a sjvwz(r.oop5g1 e0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what sb1.b7pz(6vaajo r5o 1fgew: 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 -2vwi: f, nokyiu ,2jzj 7qvd18..0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric p ,i1v7iu.zfjj ,82q ovn: wkdyotential 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 ajsoa-fjw6/fqcsq0 d- y2rn) 7vk; c :(0, 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 work required to bring a 1.0-nC charge f vcq jf-)2wr:n fo 6asa/sky-7;d jq0crom 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 place a.m k bwyb6,pqde8y:.slou 06d at the corners of a rectangle of sides a and b. What is to d:6 6qm,a8ywlu.pk b.sb0eyhe 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.*cyhun8. vrb 40 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 absolute potential in the square's c*b4r ucy8.vhn enter?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (charg ur) je7vtv x-swbpp+p c3j.dhj(//e3e +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, eachh 1-8cu9hr:s)gk-dszcye w u) of 2.0 mC, at the corners of an equilateral triangle of siy1 ku:cws9- -s dzr))h8ghceude 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 t6 z)lkuh8lo ms59bp8the plates of a 2.0-mF capacitor when it is charged to 1009l8bho8p)ulmt 6szk 5 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 platesi.yrr8y4 ht8ef:r0.d wp ikcm, c5wd1 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 with air, and the plates are separat62 l yg4a qu0p.a:vvvked by 0.050 mm.v:ayvau2lv 046 p. qgk If 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 z;rv7;q: ;ks h avh6nfhas 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 swa ; kqhmdx)nju--78bnep88 of 5.0 cm. If the potential difference between the 8nnmwqje u) sp8a7--dbxkh8 ;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. Arqdjne+ 61yp8 u xm2k :1b8czsfter the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). Hosudrc+ynmpkjz8218 : bx qe 16w 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 (lsf/t+er/ liq6 7r p6nql,oy15 mF capacitor. How much energy is stored in 7ls(/ l q yn,i+pr6to/ lre6qfthe 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 q53edowvsjyob af11e w1xv/iy 1//w* 15 mF capacitor. What is the energy stored in the capacitorve5/ w1afy/b1s1vwxyioo qe1* wd/3j ?

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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 cap,hj3 t2qi h:/2f nmakbacitor when it is connected to a 12.0-V battery. How m 22ih h/j:fnbqm,kat3uch 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+n( en4.j nrzg,c4qk f 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 z u c9/pk5n8h0i8vc iqplates 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 plqz+tc+(3 ck.ngk5 *v(lwv * ezg cgyj2ates 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 con9yirek . ii3iu+mdg;:sists 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 pl)0xeax4o l 1efate 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 wi31( rcjl4z gejvf2zlk9 5tyd1 th 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 fully charged. Tg1+kb wimosb6sq2y xci523w+he battery is removed ay5i3bow1 ik+ qw+ 6sxmsg 2b2cnd 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 connected to a 50-V batce1i 7gtq e8u 1zja2r9wq3a l,tery 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 inserted?al 79 wij3,uqg 81teraq1z c2e

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