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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 not7 /,1bz kprcdsx,v,xu 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 6m to9 *wvasddsob6 l ;-;/vtvis 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 theb4icr ub26cc 7)*bph bir surroundings. Object A has a net charge of excess elbrhcbuip* b)c2 4c7b6ectrons. 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 elect, uwxgxz ;rywg744f2gric 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 the electric fie)7hk ykjp 4qt+/oz/i) nh5 vmmld

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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 holl glu)qn,q7 mx t,s2wpu)n8(e zow 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 acceg l gj6.*wmq4uf56tia o:lfc kz7tm93lerated from rest to a speed v by a 500 V potential difference. If the potential difference is ch wu m*llt ffmi6 zj64gq5 3k.tca:g9o7anged 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 );hwu+okdo 8h au/v r)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-7nldy+ j *9rm5ystn t point B along an equipotential surfacel *d-r smyn+n7jt5y 9t.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus.u;nf,btuba 3.vw5tx*x c7rz t 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 par 88 xvtgf5u +oc1hbsx2ticle carrying a charge equal to that on the electron as a resg 8bv+ts 18ox5 hfux2cult 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 unq ,wu a22zupi:it 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 correspond4hv f n56qjo2qs 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 positive point charge isxsry(te 9q;v - 100 V. What is the absolute potential 4.0 m away from the same po(tvqy9re-;s x int 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 distat;1wgfw1d qxb m np +ngt,b590nce of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point xw5qg9 n; mt0ft1,1g +nbbw dpcharge?

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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:4qc8wp* j r 4 bs3j-bv*vlswn the 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 potential at the square's center when each of the other corners is also filled with a charge o:4j8w vw3v rln4bscb*pj- sq*f +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 n(cf: x7fion5a square is 3.0 V when a charge of +Q is located at one of the square's cornec :n7(oxffni5 rs. 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 tv8iqiq0 d(-iw wo 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 is aws3m v(n sdk).unx8;w3j vum,u u0*ws

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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 respr4 w(yt0ca4 m7 z ih/ajfe/t8nect except that one has twice the plate area of the other. If the smaller capac4w8/i4 tma0 /rye (af7tczhjnitor 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 kc.j( zuxsy7j z367w ccapacitance of C. If the area of the plates is doubled and the distance between the plates sxcc 76uwj .(yz7kzj3 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 pajfm8ry kbvp )y1 aj7v*1.f)twj ac8,/us4b ecrallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on rk )yp,ab 7ws8c1j)mbv4fe jcv *fy.jat81 u /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 t rx7nr e9;e(mdhe plates of a given capacitor is weakened, the capacitance of that capaci( xr;nre e9md7tor

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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 arko- /wnf)n/z q7(zuxc7 hpn f;e maintained with constant voltage by a battery as they are pulled apart. Du;w-/f7(q7 z o/h fkpxn )znncuring 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 voltage by ,,r w4w/4wqv8qbujk k a battery as they are pulled apart. What happens to the strength 4uv 8k4/q,rw,kq jww bof 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 between the plats simn ,+ya6h): gh5tppuw6h1es of a capacitor.ptshan)i5 psu :y6 g ,hm1+hw6
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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 pla wvsc-66,0typ)zuhb -5qthgstes of a capacitor. What happens to 5 - c0hzpq6ys6,uhsw tvb)tg- 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 be5g,ow2-hja*; k3 p(ruo bld+ag ot-cnv9,naetween the plates of a capacitor holding a fixed charge. What happens to the electric field between the platej- aud,n*c(;o+ o2n9vhab,tea 5 g pkr-wlo3gs?

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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 tombgd-r -9/n lb :fsgz1 a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in this c lg:bn rz9bf-1/dgs -mapacitor 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 constant charge causes ca(un+ n zd2+ abg65zuthe energy stored in that capan (zau2+ zagcu6 b+n5dcitor 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 capacitorj1rbd: t c)+up causes the energy stored in that capacito1u:tb )+j rdcpr 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. Whav+tq5nm .n-x z* tpelvt+4q*zt is the pot.xm l4q- q+nzt* vev5n*ztp+tential 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 point A, where the potent b+uus18nokeifl( ai q()s:r (ial is -50 V, to point B, where the potential is +:+iksns a flr)io(ub1((8u e q50 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 through an electric potential differzeenfx,q oux75(*g . rence of 500 V. Wh( gz .5e,7xe* rufnoxqat is the kinetic 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, is accelerated through an electric potr(i(tp*s*kv gential difference of 500 V. What is the speed of the igr *tvs(pk*( 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 proton6djf gw d9-(ei falls through a potential difference of 1200 V. What speed j -g d9diefw6(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 ,jshg/ u*o;dymoving $8.5 \times 10^{18} \; electrons$?

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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 differef -xvw5)znzq4prnpw)+ -dv4 knce of 500 V. What is the velocity of the electrqpr p dw wvxnk)-5-)nzz f+4v4on 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 charg+sk,w/ cbq p.ggz 6c*ce of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is m 6ccg*bqkg/+w p zc,s.oving 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 /d5y+yzb.b/po :6 9lic ifxj iparallel metal plates separated by 1.0 mm. What isiio j/./l xz:+ byfd pcy96i5b 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 to lcys2uv0m+ bf+il ntm-9 /d u7the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0l 20c -bv/unyfm7++ iltmud s9 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 towardjve8j *,e1j ; mt/+ghbpu5vewqm 6:pu the east. If the voltage meae8mqv je6;g+pj:hv / bwt51,juemp* u sured 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 along the directi/-abz +(q cymxz2u/nf on of an electric field of magnitude 3.0 V/m+-za(/ / myxzqncbu2 f. What is the 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 ml.uv4fy 3px5 by 0.20 m, are 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 1.50 m from m 4 5f.xu3vylpthe 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 battel-iuy 2tn.*zn :2 mvxtry. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050i*u zv.tx-n:m l2 2nty 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 mcrtyuek-a4 b/e5f e35, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When thue 5atre/ k4y3bf5c e-e 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 elecr5k9 2wfrmhos0.nft. j wk d(5tric 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 jffdm0.k9 k 5no(w rh2sw.r5tpoint 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 of 50 N/C directed toward the east. If8bmv+vm8v) (zay x :uwly3g( i the voltage measured relative to ground at a given point in the fieldgiw 8+3xvbm((8 vyyv mu:laz) 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 the9o2yz*v y 3bcrough a potential difference of 12 V, it will acquire a kinetic energy (in the absence of friction) of yz9*2o3 ybcve

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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 distany2c +c+rydac*8 bz5nd ce 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. Fi px,exp1.gihr c-1 w8znd the electrical potentic xph1,.8re1 -xzwpigal for the 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:v 5 x1,b)luj8/q cotkvmo1yk is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at vt j)11b,5ck8 ulyvo /xo:qmkpoint (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.zkc)iq156j s2yjyf (v0 m, 0). If the potential s(zji kf)j15q v c6yy2is taken to be 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 chad mtx6;zlb9j -rge 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 point (0, 6m bj ;9-dlzxt4.0 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 ojjy)35uxvq n s9.5uwff sides a and b. What is the potential at the center qj35yn).xufv 5 s9wj uof 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 mC are placedo n4*1 njqaonnmn5h zu8i6 ky,1 -zp6v in two diagonally opposite cornern,*nnzhvpa n1 nqy6uo5omj8-ki z641s. 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 (charge +2e, mass.hhzmkkun9( coo2 (3wzg n09k $6.64 \times 10^{-27} \; kg$) 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 q023u (mrnh ngfw0a5fof 2.0 mC, at the corners of an equilateral triangle of side 2h fuw05mn(n20qfr3 ag .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 xo3p .pm4xku91t73cz/uu agzof a 2.0-mF capacitor when it is charged to 100 V? p9xxk uzap./ 3ou1 zuc47gtm3

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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 plate-*2h9* ytjpq l7 0 4zybccfulrs 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 the pq+/vu q1 r +*bv:/ tur(nxfpcrlates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plvq*b+ pruc u / fq(:r1v+/rxntate 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 capacitpj -iep mezu4,p/xz.1 or 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. If the potentiac2re0er,kzh c.f2 km2v(h -js1 eer ;buqm01kl dmru hjvf0hrs( ,cq.ke-1c2kezk m0be;2e r 1 2ifference 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 capacitor is connected across a 100- 8/ 56crx(c qpqve*v7vvpstq7V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dt* c7qps8qqr/v c5( v6pve7 xvielectric 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 a 15 mF capacitor. How much energy is stored dc-.)eqb/q2my c m o3bin the capo3b- c/ y b2dmqe.qc)macitor?

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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. w )u u03k8mfdap.a r2;rvawg,What is the energy stored in the capacitorpmd 2r0g)a8.,fv 3wk;u aawr u?

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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 when it is connect2 j d(ko/5 puc tk7vgkp83d9 d29rkqhwed to a 12.0-V battery. How much work was done in charging this capacit93h o wqpd/pukdkck592gd78k2 jvtr (or?

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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 sod, igl3xmd..zxd f8;j 9ek8n x 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 capaci 0afxli0 vf+h4rx2-nctor 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 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 capac2lno 03x +dqzaitor 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 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 consi df+zphr/.m1psts 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 constructed q4gn(xqdld /(pd-: c+dy.n -p+qblcp 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 area ofdf5dot;-78 ky46vaoy ed1b ai $0.40 \; m^{2}$ 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. Th s2znqf,0v2yj:jv04l*gx2ev -a eyure battery is removed and a slab of dielectric that completely fills the space between the plates is i04qgaz * vje :vu y2lx0rj22-yne,fsvnserted. 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 connecte*94zgx;q exep cshhwd(+7 uktxdn4 9-d to a 50-V battery and becomes fully charged. The battery is removed and a sla9ed -n79*wdc4hz +h;t qp(s exxgx4ukb 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 the capacitor's plates after the slab is inserted?

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