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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 v4,;p/xocb u5mtr yig3y lerli5 6k/0jector?

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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 a033 myauyruf 8

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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. Obpu an255t;h6 s8 ( vfxh)llzttject A has a net charge of excess ); ltt( 68z5huh5svtfnp2 axl 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 elecm;lm2 yrvqjx3 79z9rtyff:( o9yj ku.tric 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*7ldk4nrh m8( u qls.l 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. ib9bs967kd z frsy4 6l2 tilxi:kq0i9They

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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 k81s *ba vw8y,tqd4esa speed v by a 500 V potential difference. If tkd88wtse 1 a,qv4bys*he potential difference is changed to 2000 V, 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 same potential is referred e.b8k p-tncv1 ay)*p)l n m7jr 2iosx1to 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 equipotent3.9flq.w98hp ydvpf lq+;f-5 t paajsial surfacq. yf5p+8 fhs;w9pj-l f.t aaplqd9v3e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfa(0hhk qqpa h,6ce must 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 charm0 k4euxq k5rcivh3y 1 6z.sv9ge equal to that on the electron as a result of moving throuu9ivxh6 4 03zksq.r1yv ecm5kgh 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 unit ofmj /7ekpplk h5nf68w4

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresp 2 m2(3w yovwd;pbj:5lrttt. a2oila* 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 2.0 m from f5i2ug w2x9 hwa positive point charge is 100 V. What is the absolute potential 4.2g52x hu9w iwf0 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 negatuob6,dr+ v vqeqr*/v 6ive point charge is -100 V. What is t6ur/e v v *qvor,dbq6+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 e zs*co: aoy:3 ,qfh0jkxact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. Wh*h,fcz3js k o:qo0ya: at 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 square izu n46y/s qkg aav*0j+s 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center zau g6nv/*s y4j+q 0kawhen 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 chnkpq5qx /5yw ,c:qim, arges 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 volts -sq(r5 vz6i mno7k9/jqjj(d is 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 ex1y +cr hj a7/bo:jtkz4cept that one has twice the plate ac/trk bahjj7: 1+z4 yorea 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 capacitanc,s z rxxi08n,he of C. If the area of the plates is double08, in,xrxszh d 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 capacitohu8 kl2mcd)x 8r fully 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 txu2)lcd8 mk h8he 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 be.f3n0tljl .xt lkt 56qtween the plates of a given capacitor is weakened, the capac0k6 .5njl .tfq3l txtlitance 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 maintainedl6odao; ujmb / -r*u ti0+ 1w*km9ebcihl93xf with constant voltage by a battery as they are pulled apart. or1e fkibl*bou -mhtd c l;m6i93jx0u*w/a +9 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 km2kk5dm z50c 29neb xconstant voltage by a battery as they are pulled apart. What happens to the strength of the elec259520mnxkdczkbe km tric 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 addin 0bz9rsp7wq0hx vlw06 g a dielectric material between the plates of a capaclzqr7phxvw00 6ws09 bitor.
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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(x0dc (z(urpoz u qj)6 plates of a capacitor. What happens t) uq06opdc( xz(j (rzuo 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 t7n : bdtj;l 85qev/zakhe plates of a capacitor holding a /7j5k;nlz v:q8 btda efixed charge. What 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 capaciu;8noi ceijl a, 9u/z+tor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased nla/+8u,ji9 ;e icoz uin 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 ca2sof)celoh 5yb)cq: 4pacitor holding a constant charge causes the eneroo q4): b2ls5ecy ch)fgy 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 stot5u1rm,). grgie : b)4tyyy;xavr mg-red in that capacitor togyt1e-m5gr b m)4x,ug:ri a).y r;yvt

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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 cywwr:u aqsh/p) /u4yw a7-+fnharge from point A to point B. What is the potential difference between points A and B?p 4ah w)a-n/w7suu+wy/ :qyrf

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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, w q*r90ia cm-u-xbf+ vqt05skvcv 5fn-here the potential is -50 V, to vbm xvu0c-5n --+0kqvf9t*r5i qacf spoint 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 mj ,w67w tr5vxaccelerated through an electric potential difference of 500 V. What is the kinetic energy of 7rv,jt ww6 x5mthe 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 electbw(,ukb :* u(zlcgzp 4ric potential difference of 500 V. Wh(u(4kclzbg,z p w: u*bat 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 prom /+ipvkx(m0 pton falls through a potential difference of 1200 V. What sp+k m( /m0vxpipeed 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 xc mfunk/9mit1y46, fdo 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 is o 2i7n6exn)x tc* yaps()ki)cjh,3*pct( jl gaccelerated through a potential difference of 500 V. What is thhlpge,**ncyjc t 7() kjn3)sxxpc62t i)o a(ie velocity of 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 obj8ja)0g zhs0x6w5zelos *wl1aect is accelerated from rest throu 0xlow*sagsj)zlh 8 51z06aewgh 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 potentialzogd4snc gl64s91 ph* difference between two parallel metal plates separated by 1.0 mm.g*4 dnpoz1ss4hl96 gc 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 magnit mp-v,cd gf. 5g7xuy(mude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potent.7p-mv5 f gdmcu xg(,yial 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 g/vicv/kp2tt: z27ese(+p cu the east. If the voltage measured relative to ground at a given point is 80 V, what is th cc 2 /tev(eiz7gt:u+ kpp2/vse 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 electrmup 2;xa2x;/w zio l,dz;3p ubic field of magnitude 3.0 V/m. What is the change in kinetic energy ;uuxm ; ,az 32;w/dxobpzp il2of 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 ba9bnjm4e;g* g6y:)t obiz8jq lq.d:h cttery. 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 the initial .j :*;gnt6bc 4ygqz:8d) hiqbjemo 9l 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-c.(qynzo/ 0/) kp vybaV 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, how mqcbzn//y0a)p(. kyv ouch 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, a bvsi*peq43n z 65uc6ire connected 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 ths5 u 6v3icpn6eq4*ibz e 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 electricznkpvbi/a ;q,06 g;ok 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 directly gpk;/o0;ba 6n ,vi zkqeast 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 of 50 N/C directed m3yk5uzvu t0 s:9zu6ztoward the east. If the voltag5 6u30vsmtk :zyuzu 9ze 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 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 z8 +)/h-qqg eiajk*lcdifference of 12 V, it will acquire a kinetic energy (in th)q j 8-gka*h+ cleziq/e 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 4z *:n+3nc;twfjbbwy xa9 st)yid 0x, 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.5dhs6:7q6i5z5f 2v/ fvt-gbdxlc xw j Find the electrical potential for the center of the metevd5 x5 hgvsbwx5z-7f:6/2 qdfjt6 cilr 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 chargg4iwl0jo7 y1-dm7( n(sfo4o1ofr uuqe is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the uq04 oo7i-rwg 1dnyof( 4sf( luj71 omelectric 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, ,r n 2py8 2)aj sj;ql*ilxfp0j0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to pp2ll , jrjy8an js2q;*x0)fibe zero at infinity, what is the electric potential 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 a -2.0-nC charge is at (3.0 ma1ks(w :a7 ns;ulkh:z, 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 point (0, 4n:s7 hk ;skza:a1(lwu.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 th*hmu:tbm.de t x+ )l4le corners of a rectangle of sides a and b. What is the potential at the center outb tl4h) ml:.+e*xd mf 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. Charges of +4.0 mC99s;9mznc goh are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the square'smz n9socgh9 9; 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 +jl9s74d d r:ay2e, 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,r4.hg oe aqysw4j9n96 at the corners of an equilateral trianglehwa 4n q o9je.r9g6sy4 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 is charged t3f0c -rkt :hfmo 100 k :f-ftcr03hm 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 plates of vs ; (lf6dzy qkgs+k5-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 the plates ab p- 0ik (6 b9furbcjzwv;9*ezre separated by 0.050 mm. If the capacitance is 17.3 pFvbkui9 ;(ebfczbr-zp 0* w6j 9, 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 plates of are; 7i bni6cu7.mts l*wxa $0.20 \; m^{2}$ 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 sepa5x fdc:ki o7w5ration of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what kfic55:x o w7dis 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;-e3 hwefdrn/,ry i d* 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = yedie/ ,*r- ; drhwn3f4.5). 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 a 15 mF capacitor. How much energy is gn,/+: g ntzvd7jq (n,s meh:estored in the capacitor? g+nzdh(es:7j q:n/ne ,tv ,mg

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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 e;;h .pl2ga;v n rl7lku9cvnhman5 9 avor z2:7nergy stored in the capacit;:9phgal azo l h97n2vuanl5n;. kv2m7; rcvror?

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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 fjf2k+jv7a nk 3lows onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capac2+f3jk7 n kvjaitor?

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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 storebq2r*v rsd p4;s $2.0 \times 10^{-3} \; J$ 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 area *2npd.2btar e $1.5 \times 10^{-4} \; m^{2}$ 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 c*q; uya, 7h4xz*ruw baonsists 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 cons* ygngjyh 6z 4c6,mq/cists 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 vx6,liugw2vm(fyt)sz s/70 ais 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 a+pa/ j2pm4p ;k m,afrvk8grs a;z c++grea 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 b3jk39sn wgprll fl 76bv(n-x. ecomes fully charged. The battery is removed and a slab of dielectric that completely fills the space betrkn93wxln 3- bjvlf(s.7lpg6 ween 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 a55n7e ilk;zb167k p:u st,0 xsxcfx:kfpug.gnd 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, what is the voltage across:l ,exk650 szkui fg7 :gp cxbk7.usp5;nxtf1 the capacitor's plates after the slab is inserted?

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