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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 followiqjerv 4; rr;a9i( (0bpauy,ckng is 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+1h-ed l9 ,k bgg(1mtirb*cnz*ad6 qp 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 from their surroundings. Object 3z9jbcfxb8e ryvp pl uldxy79:3z914A has a net charge of excess electrons. Object B is grounded. Which lbfvxzy7b431ppr y c :z83lj 9d99u xeobject 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 fiel6 ulmqp a/w/v4rq 2zfp(zr1- pd

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For an electron movin4m 7n+eh 5+qh mv9b o*(oaqdwmg in 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 8hd 3zwxix4wp+0rcz 7 yopav1 6 yk5j;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 +qgar22 qiwhz :fhk b+a01v o.a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the ne ibz.+1oa 2qkr+vfg2hq wha :0w 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 h -jm dg*x4efuj(49 5dfxn(ccsame 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 equipotential surfkn7)a z6 :f6k,gmu reoac,kk:a r766 )ognfz meue.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must1 8 o-jc5bvtbf 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 carrying a charge equal to that on t 9tvi+ fk 99xbv ljq17rq-w1byhe electron as a resu bb-i tq19f+vykvx1jw9rq9 l 7lt 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 unih,e4es(y wwb9t 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 correspondt 0y xm k-h.g7raxi4c ulwint7)(fy5ri)z/ 8ds 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 positivea8 y ahq8p, l+7rzm6oq*kkx e6 sw ,0nrxgv.2p point charge is 100 V. What is the absolute potenawhvram e.*8kro7p8qs 6,gz xy ln62 ,pq+xk 0tial 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 negative point chargeww nm;t0d m.9 iw.-* yoxego 1jl+;nzz is -100 V. What is tx9j;lwg1dw.w*z;.z0notm+ y nmioe -he 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 k vj-/ f4ncxnu+8vjz)b.,zrr 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 squaz fbjk 4r) n8-vuvxz. njr+c/,re'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 cp14x3tj;v 3ev 3 a(warxt) rwaenter 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 v j(3v;p a3ta1e4xr)a3rtxww 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 charxi pf jhmt3.j85;-wq yges 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 or; 4zg(e fd lhlx27o0a

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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 hbj s*vp.jcy) 1*zb r7cwo+-ds as twice the plate area of the other. If the smaller capacitor has capacitance C, the lar-pocszw) *y*.v+j7j b 1rbcsdger 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 *q5hs n* w/))ud*2nj3dsxa+ta zqqopis doubled and the distance between the plates is halved, what is the new cap)oud*hqnaqtzs pd/*)wa5+ 23qjx* ns acitance?

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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 fuu) y*os8 sizty,)g bx o)40lb8xcuxo 6lly and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potenti0l*bx8 o) 8uo ) scsox,6yx gztyub)4ial 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 1) v1u nj,2n:kuacrup of a given capacitor is weakened, the capacitance of that capacinu1 :rca1nuku j)2v,p tor

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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 capaci x.c60 trtub2fn x23tcsr/:bx tor are maintained with constant voltage by a battery as they are puf2.:t x3r0r /6txbcc2 bsx nutlled 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-plate capacitor are maintainedeida x+:c :l4toa uvg/)u/fk* with constant voltage by a battery as tu/d ok: xtu le)agvi+*cf4a:/hey 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 beti :l g-xh n,x -cj6rtjve27-jzween the plates of a capacin 2gc j-:,ljrzt6e-- x7vhjxitor.
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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 plateskz lz,(stwurgzx9 : 9; of a capacitor. What happens to the capacz zl su(wz;tk 9:gx9r,itance?

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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 platorm- nz*yn ry* pfjy84)sxn;;es of a capacitor holding a fixed charge. What happens to therzrf;y ;m)n-sy*jpon xn4 * 8y 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 conn b8e30sjo(m ndt64):ia tjqi jected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way tm4jn bj3 :td8ato0 i( e)6sqjihat 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 -4kd -bf9xsffzlg+;ni6 fz(hkp it2*ic8 9xha capacitor holding a constant charge causes the energyf 8 zbhi4*6sf;cxf+-fi i (p- 9xtzg lkdh2nk9 stored in 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 tha (ycqej+ ld5 fagp:-1yt capacit+gepda( f 5clyjq-1:y or 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 charge from point A to po o/ n;rgxa*ik(int B. What is the potential difference between ;k ai/ g(oxnr*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 isifgr2e 9m4ifba9+ m zoh,6o2e -50 V, to point B, where theb4gemm+aoreoh6f9 ifi,9z 2 2 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 ac4mjv j8. zgyz3celerated through an electric potential difference of 500 V. What is the kinetic en3 gj.z j8vm4yzergy 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 .:unj5pa+mk w - p8cb/kolxf8rest, is accelerated through an electric potential difference of 500 V. What is the speed of the p:p8bpxfc5.m/8k- k l aon +wujroton?

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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 pov)wksrq2ce4fo( (6rr tential difference of 1200 V. What speed do46(csrkwqfeo vr)(r 2es 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 m -g lns /lam6z)3p;gxboving $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron isqsox iac6 d6b7tlnq10h 4fe/( accelerated through a potential difference of 500 V. What is the velocity ofqi6en das0th lc1qf6bo ( 4/7x 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 accelerated from ,0x4k mv e1kbuwecf j5+ob6 b3rest thr6k3 45,bo mxbecefjv b10wku+ ough a potential 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 two pr 9tqoaermi1y4 j+pp233l*4p y2ghrjarallel metal plates separated by 1.0 my9yom1r2t q 4+ he3lrp2p*raj gp3 ij4m. 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 magnitu:zda vo8k3j6 py5m i3tde of 500 V/m, is directed parallel to the +x axis. If thayitpko 3 6djv 8z3m5:e 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 toward the east. If theu sxwf* n74maatp)r k2;2 *mdo voltage measured relative to ground at a given point im fu2wdot2 axak*;7p)sr*m 4n s 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 dir ,b39i3p**znl:2dzvcm jl tudection of an electric field of magnitude 3.0 V/m. What is the c,l nd32:tb i*m3dzlj9p*uvz 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 connected to a 12-V batterbjgfoj7bf rchy 29ci )ob dx2* 0):e6sy. 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 between t*o ho7:jf jbbx ys9bcc de2i2f0g6))r he 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 51t( 1j,f3c4wmkp /vzm9mz xv(tuw hh 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 j91hm/h(zw53(mtfpxuw tkz ,4 m1v vc 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 b1w,h1s4 lpdogaq )x n42u d.(7fksx zn.5y duly 0.20 m, are connected to a 12-V battery. An electron rzd1)dd4,skx 4wlx7nq..1g5 2fnuu(la yshpo eleased 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 towardok.5xz il/nk ,bt96lf 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 directl9l,/ozktlnifb . x 65ky 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 electrm 9atsq-k(p/ efh7i (ric 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 vome9-aq(f/ ir(hktp7 s ltage 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 differenceybi3 , k(4q eo(v3nzub of 12 V, it will acquire a kinetic energy (in the abseoz(b3vn yu,qie (4k b3nce 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 abk6q.up2) pqi5a1 juy 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 ends of a meter stick. mrtd anfos;+q* -/,nk Find the electrical potential for the center of the meten,-sft/+ a ;nmqd* rkor 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 a7qkcfd j*d 7d:t (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 elekc 7 jdd7*:fdqctric 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 i(/p+ .zauj ahthe potential is taken to be zero at infinity, what is the electric p(uz.i hp+j a/aotential 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+ 7kudvi2)wm 4ue n0rd (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 from infinity to por)2iudmdnw 4 e+u 7v0kint (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 ar 9zlj9 vsq.c1ve placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, a1 v9zsj.vqlc9nd 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 o,mcd+ nu/sd ;df +4.0 mC are placed in two diagonally opposite corners./ +d;dns ,dmcu 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 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 (charog;uj xufv 2gf21:)gl ge +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, each of 2.0 mC, at thb7a( :t5 la-ysag 2knne corners of an equilateral triangle of sgnakl:n -t2ay5a 7(sbide 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 2aho*+ur0 x elywp5f1 ..0-mF capacitor when it is charged to 100 V? x*yp 1ahlof +.0uw5er

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capaciwl)q ey.. 8spbwq+i1ytor 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 with air, and thce17- wd7brfcsjws w v:yc92)e plates are separated by 0.050 mm. If the cwrvc9 712j-)ws:e s7d cyfb wcapacitance 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 capacita 12 m aex4v1t-tt i6aur+p.r2ji (mrhor 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 sepal5- hr2cu s82teous2iyn0xj5ration of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate atsc28e25hxriuo yun- 50ljts2 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. After the batteq vyw+75yrwnhy7) ;0 d/8zomsg b0e pbry fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric const/ wesbyz7m g7hoqw+0y)r b0d 5 yn;vp8ant = 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 plhck,cy*wa1h c nlm 9w ze1e)tg(/8sy)aced on a 15 mF capacitor. How much energy is stored in the capachg8,n*h9yy)kwtsc (ml /aeec1wcz ) 1itor?

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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 kd(7; mxemd b. 8dsn7gcapacitor. What is the energy stored in the capacito n dx7gkdms8d;e (7m.br?

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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 o s: v+ nl zhhrku gg)mjh5l1i;js /.0mjq(t::yf a capacitor when it is connected to a 12.0-V batter k)jt1+ ilsnlqgr0/vsgy.hmj:;m ::zuh5 jh(y. 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 ci3)co96yc:khkf+ nd;c6z rneharged 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 of plates oz8qho vcfkc95 9wi68zf 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 8 (iq ftm2ta dnpc8uqd6*3 g,niml26wplates 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 capb(nt -vrbxjp . od6;j8tohm7 1acitor 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 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 capj,kpz1l f8t7 ru+m1hvrzm on.7zga66acitor 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 with plate arm4pj)g wm q-a/42l8szcksr4w ea 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 r*xd qhjjkq0g 6,dt6.k hg4+p50-V battery and becomes fully charged. The battery is removed and a sld4 j.0gp6qr*khj+6gx ,qktd hab 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 bath4idk;a;1* rp-m jsc ztery 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, whatda;j-h rs1k4i c ;mp*z is the voltage across the capacitor's plates after the slab is inserted?

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