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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 uo 132 y0wvnfinqs.6jis 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 i(olsv):qaj7ln 10 lrcs 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 surrounbq t;ds (:4qba. 1n 8lddtwa3ddings. Object A has 4qad( dd dl .;1qs8w3: bnttbaa 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 electric fiel fgdw tvr:p4.3ndy)a; d

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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 :hfv6; a e(fh2n5bi0 a7tiws xd6i c3nopposite 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 p sdyf2l/ vir.v1((ksmlaced on a 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 reh0aqb lb+qn.rp xnhiut, 17+ -vdrp98st to a speed v by a 500 V potential difference. If the potential difference is changed to aurn0thbbi++8,9qx 17pv lq p- nhr.d 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 arh1.jmngc2o z) e 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 point B alo6mv ;; aqpvn2 hux (r6umw+ed-ng an equipotential surfacpm va+uvm (qun- r;e2;6 wdh6xe.

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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 4a fhit4 7an29 l4krpobe

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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 aks..u l9i3uikq.; txs particle carrying a charge equal to that on the electron;3uui.ikkls xq9.t.s as a result 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 unit ubh 3h9yp 74fe/wbe:m 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 corrh;o/ uew1fjq 7esponds 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 posiiwyci 5nge:3t*v1 o 0jtive point charge is 100 V. What is the absolute potential 4.0 m ag ecv0:ywtj i3*n5i1oway 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+k r5i61eynn h 2.0 m from a negative point charge is -100 V. What is the absolute potentir hy 5k+1e6nnial 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 of a square is 3.0 cbqc 9.u j) 5*g2deapoV when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's cent . ed*2oabq5 j9pu)ccger 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 )6d7ret u:x edsquare 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 ) td6ur 7:exdecenter 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 that y):o x): zloegare

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per volts4v bs q:iy3p* 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 capacito,-do vp hvtqx1h.1emdz9 z)4smypi4 *rs are identical in every respect except that one has twice the plate area of tx1yv4m zdh-m)q9 v h4odpi1pt.,z s *ehe 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 capacita)br8 xs-8wq .er;x.8 mrm gwarnce of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new ca.b8rqs 8-r x8rw)mwg; x. merapacitance?

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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 p vw9 wzaae+zlq.rc /1)arallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) Whatqwza e). /r9c+a l1vwz 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 beukdb 0. yl41gvtween the plates of a given capacitor is weakened, the capacitance of that dk40b vl1.y gucapacitor

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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 voln- igi v+llj-3tage by a battery as they are pulled apart. During this process, +-3vljgi-nl i 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 ar23w/lpxbj,j )t w /wpbe maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric w3 )bxbp/p,2w tl /jwjfield 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 materia.3py0 clpmj*v l between the plates of a capacitor.0l3 p* cvmyjp.
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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 pvtk41v/bccv:6 l:z k rlates of a capacitor. W/ lv c:4k tc1:vrv6zbkhat happens 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 q7ii*gp w6e:/bkfl -b paper is placed between the plates of a capacitor holding a fixed charge. What p6g: /wq7i*li-bebfk 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 capacitor is connected to a battery and becomes -m k cs63-lwgifully charged. The capacitor is then disconnected, and the separation betwegc3li6sw- m k-en 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 capacit0oot7 8un g2ijance of a capacitor holding a constant charge causes the energy stor 27jngot0o 8uied 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 acrossmk;m 6t /rf0nv a given capacitor causes the energy stored in that capa vmmnk;/ 6t0rfcitor 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 s-w-ry ..3o bndim2 jmC of charge from point A to point B. What is-2d.no r. bwm-3j smiy the potential 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 gfrh ( (36m9s9rjd +alo0 ehinpotential is -50 gnmhr s9+a6il( r d9f jh3e0(oV, to 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 through an electric potenti2* hu3(wsulto al difference of 500 V. What is the kinetic energy(h2 *uo3tswul 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 ac d; ht a1vfy0.ni4+qeccelerated through an electric potential difference of 500 V. What is the speed of the protonq1+nfc4e;hy ai d0. tv?

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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 d: p.dz190mn s jdnce)uifference of 1200 V. What speed does it acquiren)dnd10 m: 9upsz.c ej?

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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 drk)87 6 td kvajj. vyfk;o3:vko 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 accelnhsuq+ ,l89wnerated through a potential difference of 500 V. What is th usn 8hn,w9l+qe 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 objeczyei-gu0 v5-f t is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the po v50eiuy -fgz-tential 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 pappe; .n h()c mm oso.jy/c/q*mrallel metal plates separated by 1.0 mm. What co*(pjoe/mmn h .qc/py );m s.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 magnitude of 500 V/m,re(v8e8,igzxs-st ynq l.. +q-vmsb:c j( me: is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is they+n:.e m-eqssz si g8xtrcv.q(l b (m:ev8,j- 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 *34qhx)x eu8zexp j; aN/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly za*qh8x3)u pee4xj;x 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 electric k)si7ots0: qz field of magnitude 3.0 V/m. Wha7qs):to zsik0t 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, separatdox79i36ayt)dw .dzol3w k7 n2 m2zrned by 0.20 m, are connected to a 12-V battery. An elemwtoz2r.a zwin)372o7 dnxy 36d9ldkctron 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 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 to1w5w;rhu ; rtbb5iqk- wwn1gp7i3: tf 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 pt;kitunr35w5wgwfbh1-r w ;i :pb71q late, 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 0.2p iqa. ; )uojx /9-p xjtw2pkhhpx.bxc2 n;2,g0 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative ppxwc jbpjqa.,x/g 9p);-p x hh.iuko2 nx t22;late. 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 toward xrzohh . l22a0okh0wm7mh / k/the east. If the voltage measured relative to ground at a given poixhz k/h02. 0a lhmoro7wkh/m2 nt 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 of 50 N/C directedac(q,cc it4r gd6, het f1)mn0 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 d1acf)crg, ni hq,tt6m c(4e0 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 potentiaj k2s+cqm*v.( mw-ki rl difference of 12 V, it will acquire a kinetic energy (in the absence of fric .kq*c-rjv(imwsm+k 2 tion) 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 kq,h/q9iv/ey bp:g u5 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 stichvayz-nz4yqv zt6un;*z +g,pl 2: ym3k. Find the electrical potential for the center of the mn* -g3 :vzytm +24v6lyzazhy zq ;unp,eter 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 i vv2 br-nv gar:sl/:i( -i.fxcharge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.0 m)?iv:/f(rlr bsxva.vi:i-2gn-

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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)o1jeo;lv96h+tj n 7l g. If the potential is taken to be zero at infinity, what is the electric potential e1ego6j; h+j9lv 7o ltnnergy 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 m, 0) f.q1ll r;vrj:. If the pote1 rl:rf .lvqj;ntial is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge 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 aw,. k5)y6pa p he) qpj3df9hlx rectangle of sides a and b. Whatlpd ey .pxh 3hwafj)q,)5pk69 is the potential at 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 sxv6sl:z ybo:k)/2vwh/mhmvu/ (+j g zide. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two coxzj/wvh z/y/usb: l(h6 2+)km:vmvg orners 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, pobrv* 8f; gs; 51ubkxmass $6.64 \times 10^{-27} \; kg$) 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 chu-znfvhz5/6 hvr5 a2mpwz)x 9arges, each of 2.0 mC, at the corners of an )a9m5 / zn2zrhwx6p5-uv vfh zequilateral 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 jv-q6g)xq)v tw j2o1bon the plates of a 2.0-mF capacitor when it is charged to 100g tv6 )2-jovjqx wqb1) 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 ps,p-7*h 3etewwwujaj 2xn sid55o6/u lates 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, anra usnb gnt9v, w6;c94d the plates are separated by 0.050 mm. If v ag ucr4,t9 n9;6wsnbthe capacitance 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 capacitor has plates of hx)jl3ko * en :7xf 1bbt16uryarea $0.20 \; m^{2}$ 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 ,s30q qz 4a9p sypunbqcv.v/8nz)8sh k 3i2iscm. If the potential difference between the plates is 2000 V, with thiisq9. ns)qzub3a y20 qshpk v8n/,c4 s3v8zpe 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 z)3+a lp) dkvga 100-V battery. After the battery fullyvldk z+pa3)) g charges the capacitor, the capacitor 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 a 15 mFts paze3m )91/bvyj)e capacitor. How much energy is stored in the capaciab pt9y/v3z )me)1j estor?

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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. d/k l6p+ kaue;;k w-/njf n2rs What is the energy stored in the capacitorkn;js un;+ d-2/rlw / k6kefpa?

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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 whenz (jux7ug:(qs it is connected to a 12.0-V battery. How muc ug(s(7 xzquj:h 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 sr)o bcs,2eyk;qqk4 +j o 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 cons+m(0f ha g:8eg2 gqmgmists 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 capacitor consists o627 7pa(k/ qayku7h twr-jukio7bu*n7wz ng;f 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 consistsirh8+ +r.eoz(h ye8 tv 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 with plate area o,mtrkz*+ dyr*h 2dw(wf $0.40 \; m^{2}$ 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 area6;iuqvh 0b m c:s+ss9t 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 batte,i8r7*jfi x: )x 4j0 r z9wbawcg8dwgwry and becomes fully charged. The battery is removed and a slab of dielectric that comp7i*8wwjc0g9 d i w48:zwrxg rab,jxf )letely 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 battery and becomes full i;ewov02g z+p9uw gs)y 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 the capacitor's +2swgiv;owu9z eg0 )pplates after the slab is inserted?

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