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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 ij8,er ay/bgo)de, :rhs 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 ny6 edb 87e 5yjyjo at+3b+.qjis 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 insulafu8 ;;amu, :s*pt f4ggyraksi) oe*1zted from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher *fg4upozriys8ms,*) f:1; ut kg; eaapotential?

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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 ingvqnhddv6x :+i;: dj * the 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 *)v o 5rjv)vaghdn+3a 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 hopnf8 fde 61wi/llow 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 sosu; xsw, 3t0s va(zjspa-jzbl0b:3 1 peed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the ne1 3-(vtls0s3;pjz:s bja, o xzb0au sww 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 the same potential is refe b0w-rjfk(ckd1b a lf5le0 02xrred 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 lo- aqa6 g9azkbt./ 6ymoved from point A to point B along an equipotential surfacqa/alzgok6b6 .ta-9y 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 bes*tbu ouw co4:k6(p 0 bas;oriye9 v9.

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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 elxufx6r6l i0sve:qt9 0 ectron as a result of moving through a potential df60xt9r6 :iux esvlq 0ifference 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 a7m l *ixy;l) th).nz+il9ufxw 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 corresb g7sbre 9klyw9 36*aoponds 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 di-3 ubb9my:lb7rx ax/ dstance of 2.0 m from a positive point charge is 100 V. What is my:7xalbrd-93x b/buthe 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 frqph8z ltv:2 vk vg4ax )f97yh/om a negative point charge is -100 V. What is the abso x7k8ga2yl:9tvp zh v )/vfh4qlute 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 exhc2 wlj,v/ ax-act center of a square is 3.0 V when a charge of +Q is located at one of lwh/cj -av,x2 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?

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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 squaratas 97y(gcfuqv(ze : :dljjw:6 xb50e is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential a:(0y cl9 : s zd(et agj7auxj56:qfwvbt 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 alwamnf20xw;,ji*b u e kh8ys 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 isb*u3fqvu8xv:g h p 1z2 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 i8;24o rknj dfqdentical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacit2;8f oqjndr4k ance

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capac+a 2y 2glptvi:8ggau,(zdaq. itor has a capacitance of C. If the area of the plates is doubled and the distance between the plates.a tg8gz +i:a2dlv2ua,g py(q 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. Thls,+z )l1v0vt8k 9ega-xd)kf km z8lk e plates avkklkdm-)fa 8z01+ st ,ekzvxl )l8g9re 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 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 givevxh/g7 y1s4dxg suf2*n capacitor is weakened, the capacitance *7yf2x 4dshg/uv1xs g 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 vol6n9nfd)m/ ml w)f wtt,o4uzs ,fu z8w3tage by a battery as they are pulled apart. Duwt6fw mnz,ft)wnl m8u4szo/3f9,)d uring 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 constant voltvdb8a.a4+n.k m tp*mgage by a battery as they are pulled apart. +.mn *t8gp d 4bav.amk 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 dielectr r+h vv2/:f5n.w7 h*y7a bsgcq x5pnxfic material between the plates of a cap.f5qy2vfnx v:5h7/sn g*aphb x wr+7c acitor.
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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 paper5.cqfubbtj pra : .3(f is placed between the plates of a capacitor. What happensb. t .a5 (ujb3rpcf:fq 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 plaon20zy*r z4bc duy 47zced between the plates of a capacitor holding a fixed charge. What hcz b7 zy4u*y0dzon 42rappens 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 bat+oev3 xnzo+* mtery and becomes fully charged. The capacitor is then disconnected, and the sepae3 z*mv no+ox+ration 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 ofwa c79 z3lw:uk a capacitor holding a constant charge causes the energy stored in thz u cw397:kalwat 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 ,lv4(h:ae,k jio9z yp stored in that capacitor 4,,vei(a j:9oyh zp klto

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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 poin fk y6jg*eg9-lt A to point B. What is the potential differ* g6 9ejfgykl-ence 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 *0+ ijd6n tz z.qdt5apfrom point A, where the potential is -50 V, to point B, where the poten+5j06 t qdi*pnt da.zztial 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 througwp8bk e+,ply6wka 98 eh an electric potential difference of 500 V. What is the kinetic energy of the protow,pk yl9ek6w + 8a8pebn?

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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 z-4nza+hd*w t electric potential difference of 500 V. What is the speedz4+ -aw*tdz nh 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 V.19ss)pdqu lly9 b54md What sp ls b4q95p)slm9dydu1eed 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 movin0rzt/*lh / ztag $8.5 \times 10^{18} \; electrons$?

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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 accel77u)b olcuu h1erated through a potential difference of 500 V. What is the velocity 7 l)1 huu7bcuoof 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 -dy -rcm9vv.z of 20 mC. The object is accelerated from rest through a potential difference, and afterdv.9 - -vmczyrward 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 potentb97mw)9xjrg t/,nflc ial difference between two parallel metal plates separated by 1.0 mm. What is the electric field betweertj7 c)fn/ wl9bxm 9,gn 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, is1- v hfynz/je. directed parallel to the +x axis. If t y/jfv-zhn 1e.he potential 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 field of 50 N/C directed to mp-c c6sb;9vjward the east. If the voltage measured rela;6pbs9jc m -cvtive to ground at a 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 ankf23g t:pqlc xge. q91h8(dug electric field of magnitude 3.0 V/m. What is thpg1u cegd(qht8 2:f9lg3.q k xe 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 conqacxx;u4hw( f5h3 cf6 74 jiwh,b1w 2nfsao9tnected to a 12-V battery. An electron released frof wj9u, cnfcxh2xhta1o4h43 awbf 75si6w; (qm 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 nk8 z i)3wa,ns1njwt3connected 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 from the positive n js8 iw) 31z,nn3tawkplate, 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 afs /fw8+ rq5yusaslym rlv///v6 rj 49 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 from the positive plate, wsq4/ m//9v8 sy l sfuwv56yr ra+lrjf/hat 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 electricmvy 8nif0 ki2*4jdx*i field of 50 N/C directed toward the east. If the volta82fmk*jvi i0*y x ndi4ge 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 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 fiel:3he p1yynn+ od 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 voltagehnpy:3e+1no y 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 difference of 12 V, it ko)uua:5qg lne yo) vbufu/.*v + p 4;a(us(aywill acquire a kinetice(vl)opq+a(au)fogy5uu bu* . ;a4k/: unyvs 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 2ie(;i nmdntu+pb2z+ 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 g9 f2x1krj,smrvh (0 dends of a meter stick. Find the electrical potential for thek9 h, jrrsdv(x2g10mf 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 m, tejr z7ec.;p0m xb qsv9,i/*d0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, x.e;t*0rv bm7 ,jezcid9s qp/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). Ifipp)3yvey.2) mcc0 lm the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC chalyi)y p v0.3mcm2e) pcrge 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 cho7 :t7epg cxl8arge 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 from infinity to poip:getc877ox lnt (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 corn 0c r+ f1pk)sfei3pjt8ers of a rectangle of sides a and b. What is the potential at p)ij1erf0+s3tckpf 8 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. Charv h z74adsiq98ges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -8i zqdv4ahs 973.0 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 (chargg cb3kij1ol4;ofo 9x+c xzh b(t1+(j ze +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 charg:o8p +mq a*sxpes, each of 2.0 mC, at the corners of an equilateral triangle of side 2.0 cm:8 +oq axmsp*p?

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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 itl1 ) dmf5*agcje:wv+y vo2q j( is charged to 100 V?+ vocv (5jwe*) 1jglfmqy a:d2

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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: 2cwhpoe8qa2pzb0 i2 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 wxxje t+k)z( vw.e7 h1rith air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, whatzx1khv(ex e 7+.) wrjt 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 capacitow baa fvv9 )51c6qokl7r 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 separation of 5.0 cm. ppncw5gk)t /*If the potential differen/* nctkgwpp) 5ce between the 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 capacito *c7m7u (27y9xoq1szlphd*r mvqg ob2r is connected 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 o7l2o c rm1h*sp7zg*qbvy2 7 md9 (uqxflows 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 capacitor. How much energy is stored s9 omry;6 bfk5v kc9mf;t+l/h in the capa 6vsf9h5f/; bo9k lktmr;ycm+ citor?

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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 capacit:t2v0 jzl uf.hor. What is the energy stored in the capacitor? 0 ftzvl.hu:j2

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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 1m x)no-) fhecwhen it is connected toenm ))hxc-fo1 a 12.0-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 char-.x9hhh 3j(rqomeuh2ged so that 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 w0 n mnp-pf)v80 a7*osme 8ruuof 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 consb ) erb;g2pzj-o,ru;hists 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 platkp1-qh c -me*mes 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 wipyb -pf)k zqz5b * q,l(iqkd89th 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 with lhaa6:2c59fsly a qa; 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. T qe a.jxkw;72h2g8xp phe battery is removed and a slab of dielectric that completely fills the space between the plateq2phxp 2 g. 7e8k;axjws 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 fullyke+ 5pt-kg7u b charged. The battery is removed and a slab of diepbt k7+uge-5k lectric 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?

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