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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 no u5duc93kr 5eft 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 coulomnu7jxhyil+v 2d9 * o7mb is 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 insulai2zo:s7 *mcuwq bc03/bk g1u dted from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potentia gb*msu zbk:270c3o i1q/wcdul?

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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 electhotx b.m4e)ok;g8k .skt -2ar) vu k/cric 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 fie25rv9gn wv5rald

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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+bl5ng g 0/vtd:q4eyi 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 rest to a spe fb dbcil.k38l,p9 yg;ed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball be,9l3ildyb pf g;b.k 8c?

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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 referred b6h bxj6s h ,d/kgnd8,9lz c.eto 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 equipotential surfa6o r1wgzs48pndig1dlg;iq4p*: j3 g fcgr dp3nz1fg:i*4sp gd4w18gjlio;6q 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 must*d(lylcya- 1u:gjf9.fd l f ;b5t-hpi 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 carryiph;-hff xelc s++2gy -jum.q9f2 cty+ng a charge equal to that on the electron as a result of moving through a potential differ+-2h 2;f.-yge++y9cf lhqc sjutmpfxence 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 unig8; kuw23(,jtrm ky ;fpkbwi.t 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 correspk.7b9nwm xt,+ syk 3x0f mi/mgonds 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 chargen )gceo1nb zx (,-tv5d is 100 V. Whtb,5nx - z)o(cvne1gdat 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 a2jopw6vg6d0z t a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away 6 ov2zdp0j6 wgfrom 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 theuq0:rrdb 60qj 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 pote:rqbdur 06jq0 ntial 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 potentialn7obz3(*) cwi pm mnvn*;g8wy at the center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. Whatn*y onn3vc7wb i*g mmz(;p) 8w 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 o , gohm3hzd8e i7u: vp00;scsof 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 xe ,awzs:l-6s 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 one hy67f2h7qrj .3iezlyk ouj.t :as twice the plate area of the other. If the smaller capacitor has capjfty:.u276. 3 7je iyzkhrqloacitance 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 capacra.p)1px7z yxw3p ( myitor has a capacitance of C. If the area of the plates is doubled and the distance betww.p ya)z1rp(xm3xy p7 een 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-platc 63fa ogx724rnn-t1er x)kipe capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery c4fx 2k-7npt6garo31ir n ex) disconnected, the amount of charge on the 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 field betw d7ljq -wqt+2 5cyf 1mg9jyij*een the plates of a given capacitor is weakened, the capacitancy+j5 *m cgqf7 l9dtqji -12wyje 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 voltage byps+l;rc1i las49zi8c a battery as they arecs+rpal8i zscli49; 1 pulled apart. During 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-pl5u;. dc bphsbw3w:;yb)ct0rzu /r( ewate capacitor are maintained with constant voltage by a batteryubr tc ebdy.b /u03rch;5s;z:)p( www as 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 material between the plates ydl 03(aowe, jof a capaco3j 0le,(dayw itor.
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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 vhrv3 06:qygx is placed between the plates of a capacitor. What happens ty0v 6vq3:hxg ro 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 placed between th 7athu (bt n1.e*-dgr.*zhursk t9oy(e plates of a capacitor holding a fixed charge. What happens to the electric field between the d or -*z7 bahkugs.(.n(*tr yt9e1tuhplates?

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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 fully chargeg kb1i49 b 6n -n2/wgtparn4dvd. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leak 94gitb/n4b2n w p6v gr1ndka-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 capacitance of a capacitor holding a constann 5 ze3)mebq4yt charge causes the energy stored in t5byez3em)4 qn hat 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+ issv*8 ndl-t in that capat v+d ns-i8*lscitor 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 move 10 C of ch0wt )k -6 t6peqwhxd.targe from point A to point B. What is the potential differet6 )k wdw-6qthpe0. txnce 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 potential is -58)k(ht lbfp 7x0 V, to point B, where t 7kpf8ht( )xblhe 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 potentia8(szzw . ch*yjl difference of 500 V. What is (z8.z c y*shwjthe 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 electric -3asmy5b+m :aw*6c bhnedtg(potential difference of 500 V. Whds (ea6+g:bt5a nm- 3wcm*bhyat 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 fn*gu 9rlv*z7u: js0 zthrough a potential difference of 1200 V. What speed u fjur*vz*g0s:9z n 7ldoes 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 mov*y ddje8gi fvbi*2-; 3r2nwd 5k4nok ging $8.5 \times 10^{18} \; electrons$?

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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 dm/gw7 7qdx9o s78/pb unqlw0 qifference of 500 V. What is the velocity of the electron afterw7/ g9 on/7 lqp7wqu80dqb xwsmard?

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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 from re9)wo f8c3zdt d f kw)gd124*vx9soav yst through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnituv9sf tcz9kwd4 dv1a)*g)oydo8x23fw de 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 dp9rq(m3,yyoi6b epo3t n-1t ,bt(iu nifference between two parallel metal plates separated by 1.0 mm. What is the electric field between the etp36oi,nm1b r,( ib-tpn u9tyyq(o 3plates?

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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 d;z (xw5whrix+ +zjb 7birected parallel to the +x axis. If the pote (b7x;r5 hj+z+ xbiwwzntial at x = 5.0 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 fiegaeb7): d q;;)qaulamld of 50 N/C directed toward the east. If the voltage measured relative to ground at a given qaqgm;)a ;7:udb)e l apoint 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 fdm c*45 jsb1zuield of magnitude 3.0 V/m. What is the change in kinetic energy of the proton?m4zdscuj1*5b

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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:t4.j0y h bjcq, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the ele.q c4j:jybt0hctron 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 connectestdouolfk s,pz/9k:n9 , h4y0d 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 fromhlky90: nd/4tkz,ossf, op9u 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. Ao:m;s osc9e6 ic 1p gz7z(tax-n electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.c(pm:-6o9;os 71zxgstace i z050 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 the jsj q*dp /30wlvoltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m directly east of the poin *s/ j30jldwpqt?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electrkbb 3h) -:lt-n2:llm0a tfupfic field of 50 N/C directed 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 directu m n tak)f-t320ll -:bpfl:bhly 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 difference of 12 V, it will acquire ahom*jlcq * l v/ -wyx156j7mtm-;gbzr kinetic energy (in the absence of fr5*- w-htjglcy/*qz jm; 61 bvm lx7romiction) 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 potentialn qe5 (cs6v-sbtp.k 9h at 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 ar+wsn(q8qiy 6s e at the ends of a meter stick. Find the electrical potentiay 68sq+q wnsi(l for 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 -2.0-nC 8 .jufxj g,o3qnnz6r7 charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is j73 xgf6jrnqzno8u, .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). If thdy5yw:sb- ;/h7 bd(qdk h:rt de potential is taken to be zero at infinity, what is the electric potentialqwdsy57 :bb (/dd -h; tkdryh: 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 aabxe*0oh94o3ezuvzvd j ;h+f 19wyz, -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the e09bzf4o9 1+z3;ou dz vxy*eh w,ahvjwork 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 rect89xg gw8uechd,. 6 ymo0lgp,p angle of sides a and b. Wg,o g9gw l ,dpx hm80pyec.8u6hat 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 siu15* a nqdd*3v, moc jv,f3kddde. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 m dk,a3mn*5q*jv3cvoddf1ud, C 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, mdrr;6;:mqk uuass $6.64 \times 10^{-27} \; kg$) 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 of 2.0 mC, at the j:a 7 +d)p/we2abdu cit p)fi*corners ofcpuj+* )adw 7id2f/:tap eb)i an 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 capacitoy *kzc4- ,t*e*dk 6 mytpwer*zr when it is charged to 100 Ve*t cepk**4m*ywtyk 6- r zzd,?

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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 h rsig0 uyy2/py1sekf -/f+oh* as 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 ulsjq::pzz ,m41h+ xcis filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate ar mh:+zqx41 csup:,jl zea?

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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 arf fb8 7*;,l1 qzq9m2wcaktglt 34yab eea $0.20 \; m^{2}$ 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. m-xtv s0c6s0 yn3x24vewzht : skw w9)If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the el0ww3 6vhksesz0vxt4 wny)s: ct2xm-9ectric 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.kxr6 hk9w v h x65gu l haecn7(j5ql2ve0-t8i: After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielx 5telv cajqx976h26w ku ivlrn5g k8:-0h (heectric 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 4 jcrb77t:nbqn9x;fh a 15 mF capacitor. How much energy is stored in the ca:b9t7jn qb nchx74fr; pacitor?

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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 ucx0t8 ;rrok* the energy stored in the capacit 0t8*ocr;xkruor?

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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 capacitor wakp1;ew:ynj y *z6 u*cdn -s4n9 vwib6hen it is connected to a 12.;9y4 6vb1*6jdcnzn sane* :-yuwwpk i 0-V battery. 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 charged so that it stores q4omb7or)raimb 6 55i$2.0 \times 10^{-3} \; J$ 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 av) - 3v2ldm)vi,xndtarea $1.5 \times 10^{-4} \; m^{2}$ 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 capacito.d +hr) l89 c2mbqh+u+kr byspr 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 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 o 5291vthg+gm (cvt yvxf 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 pu pii-43gety-. .say wlate 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 cod iffyy t yn*)/u6k 4v+agw7*rnstructed 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 batt;bqyu7 9fx-jxy8q mt+ery 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 y+qyu-x 798t fqx; jmbhas 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 battery and becomes fully chamz3 . l uj s(4-aeifmyj14di4erged. 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 constemjd4l.3-i144ym a i jefsu(zant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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