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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 vector?ne((( *uve v bjyf7 fwpi(,.mh

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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 qun4wr/*k s-j: *dgmh 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 insulated frompq.v++au3l 4 dxem be2ir2e8 n their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potentia3aid4+p 8m lq2ne. r2x uevbe+l?

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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 ofq)c 8l o9cf)yot z7vy, 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,z 7;*yyg2ga gazu:to 1*n7 llj ae)kj a direction opposite 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 iqrf o6l,m81ihm 2 lhw*mp)/ksphere. 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 speed v byg8t y) svma) v6vg,r5t a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed ofvts8g r v a5),gtyv)m6 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 poi .ywck(r5mkr,nts 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 equiowc)ym 1vjvi3t5-eg t;0c u(apotential surfacu5 yt1ega0v)t-c3w omj( ci v;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 bet,lk0n5ek-m h ab./z1ws x l9o

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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 that on the e u.vqei,4j t+dlectron as a result of moving through a potential difference of one volt is referred .t+eij,d 4qvuto 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 iss8 tcz 4 gs,-cd4rbl:i 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 corrgx,/1llvlex vjn +, *sesponds 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 u hp;c s r2sid)8h6jjl2e;g jdmg:skygn;8+ 1of 2.0 m from a positive point charge is 100 V. What is the absolute j 2n:k6 ju;ggl8sh8 y dcs irhgmd2e )+s1;j;ppotential 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 distan dg//q) deuz 85 :.njpv7(jzpqw3yu fqce of 2.0 m from a negative point charge is -1w /u3zd7qqzy8pqe)/u j(fjgn d:v.5p00 V. What is 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 of a square is 3.0 V when a charge o ,dd8 w6uiyk,zf +Q is located at one of the square6u,iz8d k, ywd'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 cent8rvayo lw0 hjvj*0r-wg ne (a9x,65 eter of a square is 3.0 V when a charge of +Q is located at one of the square's corx,n0y vrt*v9j w0ee6r(5oa8wgh l a j-ners. 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 chargepx ubomf d :(9ce8.bj0s 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 i/-u+mdjzuz)hwb +(vo s 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 in2kg*lo7 tmz6,2g3bqo 9bv qqb every respect except that one has twice the platl*2mbkbq qtz3 og ,7bo26v9gqe 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 capacitance of C. If the aretqz37y7eu q+ ,*t w/ /:onajs6utyp zma of the plates is doubled and the distance between the plates is halved, what is the new capaczastunt: o wm3y,yp*j67+7/e tqu q/zitance?

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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. Thepp,3 4kw vvf k21fbi1wgjz7m. plates are immediately pulled apart. (With the battery disconnected2mkfvg31. 14kwbipzwf 7 pj ,v, 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 between the plates of a given cap* yuqin7xh,b kh4,v2 w+e vlt-acitor is weakened, the capacitanxh+,2,ue*qtbi-hynw7lv v 4kce 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-)kdsp smh9 j,0plate capacitor are maintained with constant voltage by a battery as they are pulled apad0ssj,mh9 k)prt. 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-plate capacitor are maintained with /y8 , )sb6fycuk7qcwo constant voltage by a battery as they are pulleub)yk7 ,c8/fs yc6oq wd 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 betwr7e jn. (1z 0e shdwwhz6zo0+geen the plates of a capacj1zder0gz w.67snw h+0o hez(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 is placed between fhe .djfi)nd/:,sbtxn*v;: f the plates of a capacitor. What happens :dvbj/ f:*;nshifxt de. n)f, 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 placed between the plateb07(d(sh ) ;obqb r.nwf m+bmws of a capacitor holding a fixed charge. What7w n smqb.o)(+h0;r(fbbwdbm happens to 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 is connected to a qwcu 2x*dsj)u9 z6b3s battery and becomes fully charged. The capacitor is thenjb3uuqd *s 9wc)zxs26 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 holdingvz0er*w cbb 2ogdd qy0jg4/t 0)k0zx6 a constant charge causes the energy stored in that capa kd* 00/d g0zyt6erzw)jcgbbxv 40o2qcitor 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 give1r,us i- acbk3s*2rs3w7ix ca n capacitor causes the energy stored in that capacitor rxc7cakswb *r-a23i , iu3 1ssto

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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 mjyom mtq57 uo3j* ga(dk(x- o8ove 10 C of charge from point A to point B. What is the potentj-u(kt(7* 35 g8mmoydxaoo qj ial difference 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)ni5s8o- tcl9 8xe leu point A, where the potential is -50 V, to uxsl5c98n- oe8le t)i 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 r 9r: wvem2y 30 89a*1llm+oc juthvcmmest, is accelerated through an electric potential difference of 500 V. What is the kine:9vtlec2j mmow1*vhymcrm + a0l9 3u8tic 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, a9tdfl8sj :,ml jvs -:is accelerated through an electric potential difference of 500 V. What is the speed of t:d8f:sl laj9vt -msj,he 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 flyar-)mhwba 73mi; 6lalls through a potential difference of 1200 V. What hmbyla ;l am73)i6w-rspeed 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 movinwbi t b:j-:ot/0mtxi9 g $8.5 \times 10^{18} \; electrons$?

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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.t.4ikm0 1tv) vuhj(vxckm g .ac8o+ t* What is the velocity of the electx 0uctk*1.+4.cgj8 avitt vmm koh ()vron 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 chagzg ps-mm /jq0q;ong( d6 :s+mrge of 20 mC. The object is accelerated from rest through a potential m gss6;:ggpqq no/d-j(+ zmm0difference, 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 )ep7iw 4ehz5 8i)dv tt hgz(4nelectrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the plz7h( i v8zepd 4ntt5h)g)ewi 4ates?

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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/b4;t umszda * 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is mst*/u;z a4 bd2500 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 ele,yfd5 z8h mz(m:w2mhrctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a2 m fm: hh58zm(w,zrdy given 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 the direction of an electric field of magnitude 3.u nk u4-i*xif2ib:dm30 V/m. What is the chanu 3 m4idi-fi2xbu*kn:ge 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 to a 1r nx(8,kuy:qe 2-V battery. An electron 8nqr: yxek(,u 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 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 batte lg.0d+u*8ypelqobi 3ry. 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 from the poe i0ql + 8ou*pldb3.gysitive 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 /spokm(/l4jev n8cu fc2h 86obattery. 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 from the positive plate, what is the speed of the nm(cs/o8 jp hl6v f 2o/cek48uelectron?

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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 towh1ff/ 7fjqum .ard the east. If the voltage measured relative to ground m1 f7f/qfhuj .at a given 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 o-bm:*blihqt -*y o5fors43 hwf 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 di-b ryoos3qh mwt: lb* h*f-i54rectly 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 a k klra6,gohwt1q *+d zon 2 h,(jy-act6ine+ on6(tz,tlcyg ,d*- oaq1r6h2jakhwtic energy (in the absence 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 a dist mf.k/ 4 fq96wok ( -sg2wjujspno4-srng3,l cance 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 electrical poten q0a s8yo/kv0y ztclj u9ka;+3tial for the c3y0j0vz k/9ouc8 ykts l+; qaaenter 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 m, 0).vctx v w0(9gf6 If the potential is taken to be zero at infinity, what isg (xcv0fw t96v 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 at1;kqyatwd+ tp0 pw-jli ;ao67 (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 electric potential energy of a 1.0-nC chary1p+o-j 7awdkw0;a p;ttiql6 ge 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 ad6zb x84kiufgw9 .fw4 7fl ny4. aphj)t (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 from i9x4gdi 7j4fakl)y wuhw pz64 .f8.f nbnfinity 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 6xnep jx1(+w4iopw8sides a and b. What is the potential at the center of the reiw6 oex(j+p14 npxqw 8ctangle 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 placed in twoc9m68vgas3 d p i(ybb8 diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potenbpag(vm838 9d ysi6b ctial 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, masv7rj)ub3,7x ym kr i+hs $6.64 \times 10^{-27} \; kg$) 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 2sj 6 x)2mjt:dq.hwvd).0 mC, at the corners of an equila 6ddvwq). hxsjjm)2:tteral 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 isb6x+uif, kb dp9- t wqkzg;t// charged to 100 V;/ zdbqgp69i+/- tkkfubxw, t ?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capaca jywcw-oli*g5o,-9qitor 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 w0wa16zfy c9 :ev .os(* adqvxrith air, and the plates are separated by 0.050 mm. If thewyz0ed qf1v69vxrsa a o(c: .* 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 pb4v6 i-bg*uq slates 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 8o8 u3odlziwy z c(xsi/,o l0o:1v3bqthe potential difference between the plates is 2000 V, with the top plate at the higher potential, whzix8 u1vblds(0/:33ociowql o , oy8zat 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 connw9e*x, gcenaq :)ux 8yected 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 additional charge flows from the battery, which remained c ca*8xgnq:e)9u,xw eyonnected 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 capacitor. How much energy issx q/3g1gfi9d - 6fncju 75uwble7pv) stored in the capacitor6b 5xc/vuldn7qsf 39e- fw7g1g iju)p?

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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 f e z8t5o+l-15jos;l)h kjpnl the capacitorhef;ps5olj) z 1no+ l58jt- lk?

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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 oz*t7u 4,btgti+i 5n otf a capacitor when it is connected to a 12.0-Vbz+ not5ttiu7,*tgi4 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 that8:c r (p*g-/z)bf pxspbts4 rt 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 plates ofciovu t/r7dr9. b/h2w 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 xc1-js+d5r oparea $1.5 \times 10^{-4} \; m^{2}$ 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 of areanq 0o zrx9e.yg exoh/; ,fj58w:hkr /b)jfoe * $1.5 \times 10^{-4} \; m^{2}$ 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 capacitornm(+ z(d7bkze x42yovus*i6 z is constructed with 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 constructed witz9nx: q0h6 czkh 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 connecte5 c(my phq4;b /-b2yv,uql62oxicoe wd to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that l6e viw xo5yybh4pc ;mqq-2uboc,( 2/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 battery and becomes f7dtw2+j (ao1 zo sis i13wj(dqb9op+ uully 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 voltagw1 iopt( s sbqj 9oiz+d wj(13+7ud2aoe across the capacitor's plates after the slab is inserted?

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