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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: 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 not : gmgc-5 i+bjca 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 av77k mt*m n9vf

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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. a p7dknc +t*x + x*xali9kdr)/atvj:* Object A has a :+ da*p/79 j +n)dvx*lk ai*ctxtrxka net charge of excess electrons. Object B is grounded. Which object 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 electr g1nzzlgi)uhb; 69g/bic 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 opposip-zo-x ( wj2dyy k.)f 2zd*nnsg90eqste 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. Tbew.n5foeqw+5yx 2n* 0 jtpa9hey

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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 acce zw:q*-6gb/ knby*xfn lerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V,-bzn*k*yw:6 n/gxbq f 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 the sameqe.3*e0z jzoml,nx o* 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 equipoten7)gw2 -nybc7u kz:jgrtial surfaceukg y-znrcw2 b:7 g7)j.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mu: y:o8a )ey9j mofog,jst 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 k;de2ubsr8i-n 6m)k bthe electron as a result of moving throu2m)b8runike sd 6k -;bgh 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 unit3epg1 l1e8x sx 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 correspo 6f1buz u,pe*;fq4tgv9r.q w to02wg onds 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.jgg. 4 :, rvmlkrxt(r80 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same pointlmgktx: v84 rg r,(rj. 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 i3 +yrc 07wvn t7nt0jlcharge is -100 V. Wht0j+iwtrycn0nv 7l 73at 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 .ntat-,7iqg c v8h )oqthe 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 potentia.v8,t t)7g-i qcoahqn l 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 square is 3.0 V when a a c6jv l6ho2l3tu8k+gawn 3vrnx4 0g) charge of +Q is located at one of the square's corners. What is the absolute potentinx8hwca)vg6ol3 6vg+ tlr4 jk2 0ua 3nal 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 charges v;*79ud s+zjco qes b(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 81w i xrg12 c4ur)io 0tvieo8vis 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 2)mlkg:1 anaiki)4nz5x 8gzdbsi g-1 identical in every respect except that one has twice the plate area of the other. If the smaller capacxikk8iiggal z:b- 1gdns5 )m1 a2z4n )itor 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 area of the pl6 ym b5:bjafgxt7r e-;*.aglcates is glgbrea; f-:.byj*76t5a cxmdoubled and the distance between 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-plate capacitor fully and then is re nt bl3z0mx itu9-w52v1pfh.lmoved. The plates are immediately pulled apart. (With the bahbl 0wn uf.9m3ti52px -1zl vtttery 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 the6u*lhk h9p-tbz. v3ny plates of a given capacitor is weakened, the capacitat6ybp 3-z*h. hv9uknlnce 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 r-hln b3g*hm1i ;q rg)capacitor are maintained with constant voltage by a battery as they are pulled apart. During this pror*g mh13 bhrq-ngi);l cess, 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 capacikgw n.z xta9 g5v7p.h08dgra.tor are maintained with constant voltage by a battery as they are pulled..kgp h7gz8nr axt 59gw0 dav. 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 bet h7ng w1v*dq(xp*:f teween the plates of a capac *1:*dwpnqht xg(7vfe 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 pawwmjat53aiqgd7 bhod,0e,d o)l*3 )laced between the plates of a capacitor. What happens to the awhow7) dda,) tg53el0ij3o q,dmba* 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 (g mh*spob lus- y(4o kw;9pf2between the plates of a capacitor holding a fixed charge. What h*uflgs;ypp (29 h 4ow(-k smobappens 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 battery and becomes fully charge*(typlta ; s1hcdrls4wu20 p 8d. The capacitor is then disconnected, and the seps yrl*l h0s2(cd p; u8ptt41waaration 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 holding a consr d) 4r3.hxbjntant charge causes the energy storrbj) n4.3xr dhed 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 voltagey*im p m,8yq-i across a given capacitor causes the energy stored in that capa8 y*pmiyi-qm ,citor 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 point B. W bg e(84ig 8oq39mkxhihat is the potential difference between poine kbh(8i8 oxq34g9 imgts 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* w, iiuu)q;vrtc86gc from point A, where the potential is -50 V, to u* 6;cct iui8qvw,r)g 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 rest, is accelerated t(r yjz3 ;d/kjchrough an electric potential difference of 500 V. What is the kinetic energy of the protod/y3jk;c jz (rn?

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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 poten; y q5nx:p5)p kw r7;dxm2enrftial difference ond x2yqr; pekmw)r5xp7;: nf 5f 500 V. 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 thrjm1xmd(u -z u2wq5* tyk7c)y,j9s vxhough a potential difference of 1200 V. What speed doey* du -t5cmqzy2m19 u,s j(xhkw vjx7)s 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 d2mt7cy +o n5ae6tuz5yo in 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 icvb(gro.nh jo w/ 55q5s accelerated through a potential difference of 500 V. What is the velocity of the el. nq5j5g 5cbv r/owo(hectron 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 wi -0 zztz9x29f ggg4jjz+ ec+20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitudejt+z g xg z2zf+09g-wi9 jec4z 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 electrica hkun(c4bn1 b;l potential difference between two parallel metal plates separated by 1.0 mm. What isu(;4 1kn nbbhc 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 magnitude of 500 V/m, is directed parallel to4 7wq42opfg;t aef)in the +x axis. If the potential at x = 5.0 m is 250o wfg4 e2i;7ntaqf4 )p0 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( k5ncpsr xdy ,6y6mn) the east. If the voltage x(nyn5mc dykpr),s6 6measured relative 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 alp/wi )dfj4lhm8+l;o( ojm0u wong the direction of an electric field of magnitude 3.0 V/m. What is the change in4 w)julimld/8(+0o wmjoh;pf 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 connecu; sp1 ben8,ovt)4dhawc n):qted to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. Wbn:sna ,84h)uvqp;o1)e dtw c hen 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 battery. A15t ehww sv9izu7xnn(t-5 jt3n electron released from rest at a location 0.10 m from the negative plate. When the elec -35tun1w ej5tsx7 w(vznt9 ihtron 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 bat tgv 6:8q;,6-r yv;3 ajtm+tjxmbn vbtbg7do: tery. 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 fromt, 7mro683b+ vbjymdj;vtnggt ;v6qta :- b:x 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 t zzg3j,dvf)* yhe voltage measured relative to ground at a vjz3 dz*g )fy,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:v4wxbjn/.ed b3p)xy f 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 d: nb3vdbj/x )4 .exypwirectly 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 acquir7ib:z7dqu57r( pppcqe l) 6 ire a kinetic energy (in the absence of frictionuprprc 7qbq5 6d7lie)7(:zi p) 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 afjr/*mcco m;7c 9s( ydistance 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 lsw4x7i kd; q3q3uz3gvw/vq)ends of a meter stick. Find the electrical potential for the center 3x) l/iw usgzqq34 dv7k3q;w vof 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 atmkdmsnb26yz610dk ckxk 1r+ 6 (3.0 m, 0). If the potential is taken to be zero at infd 6xb2 0z1kc6 mdnmkr1s6y+kkinity, what 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 -2.0-nC charge is at8km ;wc(erj. t) s3ub3uns3cn (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 n3mjn8ucw )t3e;su sr 3k c.b(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 a -2 u ekh/fykj-f.xs1i725 iqzw:.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 chkyiqx.f 51 su:h7fkj iew/-z2arge 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 rectangle of 8slzef f)mu3xej 7m4+x(2 wkn sides a and b. What is the potential at the center of the zfjx73 ( 2fel)s8mxew mnk4u+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 +4.0 mC are placed in two diagonallyp3 pg v3)7jbyewk/6mx w+p5t *zp-mhw opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What m kmvpw pwxe-ph)57*3j /gtwy+ 6bzp3is 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 +x.kf,j* foml3i.ks7 g2e, 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, e4v1j +-df7t4ta gggyd ach of 2.0 mC, at the corners of an equ1tg+- 7gya tvgf4djd4 ilateral 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 platebkuyj5 b6j fo4t4*4rms of a 2.0-mF capacitor when it is charged to 10*4t5uy 44jomfrk jb6 b0 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 (xwoy vp9+j* rplates 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 capac;c6oehfxran36x3lcgzs3 y) 1itor is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what c)rycxo e6 a;nlf 336x1sgh3zis 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 plar wej j806cv.ftes 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. . +5xt2gpa;vciq8 tnlIf the potential difference between the plates is 2000 V, with the top plate at the higher poten8a p+ i5tx2c;gn.ltvqtial, 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 co72m pse7 er1nbnnected across a 100-V battery. After the battery fully charges the capacitor, the capb7es m7r p1n2eacitor is immersed in transformer oil (dielectric 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 b vac-psko7sn ms414a 15 mF capacitor. How much energy is stored in the cpb4ss 44s- mn1 oak7cvapacitor?

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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. .nwz- d;ydc *m++ yxvl5fka v)What is the energy stored in the capaci;x n+c ad5f+ykd- v yzlmv).*wtor?

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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 flows7c 3uw1hxtm x 18dl3mq onto the plates of a capacitor when it is connected to a 12.0-V battery. How muc7cx 1xt3wh 3qmum d1l8h 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 fs w7gbyn: v/t8+p1j0 c4k, hpy zyu7f$2.0 \times 10^{-3} \; J$ 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 areaz;aa y 3 mjm:ywmh-/h;r /.tvz $1.5 \times 10^{-4} \; m^{2}$ 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 plat*y1 de(kzq0 :qkbxjh2 es 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 consistssa ab)7 j11 k 0s-s;sma(mabga 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 construcrqrd52 ) i) nkb1.rzcyted 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 constat8/cur3j9 smructed 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 +f0jsfr6o;hgj k+ mp;to a 50-V battery and becomes fully charged. The battery is removfr ;hog jjpsf;++k6 0med 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 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 connectedtwd21 lm;o2g( 5+*rmi s)dj14x f ct mhowxxf1 to a 50-V battery 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 5fo 1mi(mm x ;w4x sld tjw21f52xg1doc) r*th+.0, what is the voltage across the capacitor's plates after the slab is inserted?

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