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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 followimq**hs qy0j7sv5d,- qnq -xbf ng 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 uaj 0l .avj6u4uhdv5v-kow6 7is 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 olcc32s:7 iymjf )m d0z85zlefbjects are insulated from their surroundings. Object A has a net charge of excess electrons. Obje5cz:3 80dm ye7m 2lcj)sfl fzict 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 j80 wmfxw :t1h 2l7n j-wbd8vffield

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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 eles e)0ckk +or-wctric 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 conduct m;pv./f vi dx2u ,t2hu/rj+qaing 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 ballzzy-l is.4c, * l*hji2vst8gd is accelerated from rest to a speed v by a 500 V potential difference. If the potential difference isyz8 i2h-j 4tl vg*i,zcl. sd*s 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 rixp8(sc 0i)z v ldn;.k4n(lcweferred 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 ff avr it lc) *tq/8/*w1aoii7jrom point A to point B along an equipotential surfacec7liqw /ov*tr1atij i8 /*)fa.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfabm / (x2+mdwjzce 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 heka 8d0a2 nt(carrying a charge equal to that on the electron as a result of moving through a potential difference of na(dha08k 2et 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 osyf; ozh f:.1of

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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 (ocs h)fnw8i,nds 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)0-hkwmo1i rp5m yhp2suw 3h k2.fri2 charge is 100 V. What is the absolute potential 4.0 m w rr 2- 0fymhio 1hhisk5p3ku m22p).waway 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 pointdy2il-m4,s78eh6cyxyfhuw1k n) l1 u charge is -100 V. What is the absolute potential 4.0 m away frl1kcx)hm8w shd y4u1efyi7-u y2,l 6nom 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 V when a c gkzh6v3gfzvmo cib5m(+ 7y. )harge of +Q is located at one of the square's corners. What is the absolute potential at the(o6g+mzcg f )5zi. mvby 3k7hv 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 cxlfr0 7upz 7wlxj11-i enter of a square is 3.0 V when a charge of +Q is located rj0zl77px -1 li wxf1uat one of the square's corners. 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 alwaysjkom2 h*: 3f5281hfsf lsepjk consist of two 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 :xb9;n cp4p9z3 vad yyaa/zu 8is 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 i*5 w2fjuku5+fz a.je respect except that one has twice the plate arjfe+fji* u5u .5z a2kwea 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 has0,jmpjvw5+xc 3td)+lg g 4yvp a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, wha4 g,mlvt3c )+dy+ 5jpw0j vxpgt 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 ca vd(76q20k5aj(ixir wu1s gl epacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnesavuii1 60 d(7ew( 5qlrxjk2gcted, 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 the plates of a given capu pz-iiite 7(+acitor is weakened, the capacitance of that capaci (iuip zt+7i-etor

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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 conslal4/3)h8 jl nokk. tztant voltage by a battery as they are pulled apar8 ta/ll)j4zlnhko . k3t. 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 capasmd *hs:tg6eodbe,r pk7 4-r2citor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during tk2m-osrdt6r7h e,bpes d4:g*his 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 dieleu*se cx5c+sw9tvd/t 0ctric material between the plates of a capaci0+uwvtces9s 5*c txd/tor.
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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 platfap;gl86 2a t;qfvs x7vb(w0ced between the plates of a capacitor. What;(7wv;26a qfstx l8ta 0gfbpv 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 paper is placed between tpen ,t48a24e5y fujgh 1+qbafhe plates of a capacitor holding a fixed charge. What happens to the electric fiy548+eg 4f heqfb12paua n, tjeld 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 t0ohq: 410gpjbzwg 5fbecomes fully charged. The capacitor is then disconnected, and the sepao:p tzggh b0q1wjf40 5ration 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 cam+dspcr 9:bn tm- tg:4pacitor holding a constant charge causes the energy storedpt+mnb: s mdc4r:gt-9 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 sto7+br aw/( wnsvred in that ca7s+vrnw (/wb apacitor 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 f gkq (ebet psc+-q*88lrom point A to point B. What is the potential differ +8bgqpt8sl* eqk-c (eence 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, wu;q -b9saam bv2/ dm)igk5z) chere the potential is -50 V, tm9u52iab;dvbgas - mc/ q)z) ko 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 potentiaby6:j+qz9k ll l difference of 500 V. What is the kinetic energy of the proll qyj+:bk6z9 ton?

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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 )gs a9 )each6ajb w2*ielectric potential difference of 500 V. What is the speed of the proton9 a6a)hiceg) *2bjasw ?

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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 bbl-v9 7z/w as4 5ihpyy2)8k 5.pbs/pqlslo ddifference of 1200 V. What speed -//)5svbs i7a wbq 8kh5d lsopl4.b9y pl2z ypdoes 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 mov6u . kqm0mkw- ;7av,t ef+ztvfing $8.5 \times 10^{18} \; electrons$?

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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 potentil2jd pa1kee j9q :s ymool:)1:al difference of 500 V. What is the velocity oq:dj1yemjak:)2 l9s1eo p:lof 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 accelet kljao.q26i(rated from rest through a potential difference, and afterward the ball is moving at 2ot(jk aq2l.i 6.0 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 paral:(taho6g, wrk lel metal plates separated by 1.0 mm. What wo6(ga, rh:tk 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, wity9h r+rr yv5q ./p/blswa -tt2h a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 25+s5 hypr-y.t/w2q l9/b vtrra 00 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 dir ed8v .2vff-crected toward the east. If the voltage meff v28d.- vcreasured 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 mhu 0s c*8twe7c along the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of * wet 7cshuc80the 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 akj pfe-8ybj1j6b0t 7 zfcy3 av 7w*e;0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m fromfabj ep7ky8yjw7 cezf-1vj6 3a* bt;0 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 to a 12-V batte ,+tkxoi*6lqk-2v:ya(q tixvry. An elk(:-l* +v iy q,t62qx xtaoikvectron 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 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 battfy6s8c f rma5ax5 g *.9f*wy 9wmd9:bmwgo.jmery. An electron released from rest at a location 0.10 m from the negative plate. g g96 x.w5ws9.am8bj*f fmc*mfyrm:9d w o5 ay 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 ele9.8vbcxi rusgi 4dd* 6ctric field of 50 N/C directed toward the east. If the voltage measured relative to x49i8 *usb.r6dcgi v dground at a 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 electricg*m4pm 1 lj-hu field of 50 N/C directed toward the east. If the voltage measurm*pg-jm1l4 hu ed 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 difference of 12 V, it will acsclze7 (0d)j5*zbeillf5 3 yh quire a kinetic enez le0ey*hf()b 75ld cjz3 5silrgy (in the 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 axgy;)dfke 7b* 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 enhpch-r u08va6 2f,9qifb:c jk ds of a meter stick. Find the electrical potential for the center ovqr j:puk 0,9 cb-2 c6aiffhh8f 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 cha;-,x s ;ngqzx,pbx.7p3wy rfvrge is at (3.0 m, 0). If the potential is taken ;p;yxspf ,v3br7, xzng-. wxqto be zero at infinity, 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 at (3.0 m, 0zv:o.cca 4ynd*9 g;o lwk+i yl8) wz;q). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at poc;kq 8ly9wya ;gw4 zo +vz*i:.dol)c nint (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 (:2i fehtqu* sar*4g8q3.0 m, 0). If the potential is taken ttig*8qe*sur:h 2a qf4o 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 a9i- m2ixg ltn m9ih):c rectangle of sides2g nm lim)-itx9c9ih: a and b. What 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 side. Charges of +4.0 mC a z x.0e5u-gggjre placed in two diagonally opposite corners. In the other-gggj5 uzex0 . 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 (chargqwk egw j45klsh944) oe +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 charga 6svvp+ 8z-ytes, each of 2.0 mC, at the corners of an equilateral triangle of side 2.p zas+ tvyv68-0 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 plc e dnl(o)z/6lates of a 2.0-mF capacitor when it is charged to 100 6l z nlcdo)/(eV?

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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 platembc08 b6gpbw ,8j zaz5s 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,skflms /.:c y, and the plates are separated by 0.050 mm. If the capacitance is 1f /sc ,lsmy.:k7.3 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 capacb :z0d fmg1.p h)-/wl1kmvblqitor 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 tfqj0qt,ysc-t-bb;gyd l (z 5i l9p2 6zhe potential difference between the plates is 2000 V, wi0bdlt(ycjpqlftg2,q6-zsbi;9z - y5th 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 acrossvounr h1)xj)l.ddv ,9 8d dfq* a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the batte,v98l q j * ddhx)f.ru1d)vdonry, 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 mul2;t:gxsjt0 lch energy is stored in the capacitorl0tlts:j;2 xg ?

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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. Whatwx k7cdn3(k r-pd i0c ;j/abt+ is the energy stored in the capacitobp3/r;knd(a7 c 0x jktic-d w+r?

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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 wh07zwx*c;g b;cun0,b0 gfbanoen it is connected to a 12.0-V battery. How much work was done in charbu7*0ngg 0z w0nb;coc,x fb;aging 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 itre1kwdx/3*zbft 0 tf4 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 of ar1k sa ye6o 3;x:)smsoazyx*a;ea $1.5 \times 10^{-4} \; m^{2}$ 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 cap e u-e//yunjh4acitor 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 consistsyalww0k r 86 rrg/ypc6zf5x 8. 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 plaicpe++11nsl 4r6vz1-nzy. edjx bxt- b)3o cyte 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 constructe kr-vr7zdo 8c9oev.t,dwn8: c d 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 to a 5314 q-djgo1u+qh*vgfyu q; w q0-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 cq-v 3jg41+yf qw *d1u; hqougqonstant 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 bf p-rb exl2hk0tiq r1ym5:ltx)6: y*pecomes 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 the capacitor's plates after the slab istqrrkx x:2 )-bp 605p* yy1itl:lhe mf inserted?

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