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习题练习：Physics Unit17: Electric Potential
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 作者: physics  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 followinqai 31*uo,z; jwfl/feg 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 ik.j0) dr5/3lbs nwf gfs 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 insuluao 4vev9)g q)ated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potentiave4guv)o9a) q l?

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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 thdwd:k* :k6)mis -r hd7um o;fde direction of the electric 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 l fmh8;p3f; emdirection opposite 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 placegwsva ).k7*jy w n32wjd 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 rest to a speed v by a 5*;0-eg 88jzjos tkbacyu7 j9o00 V potential difference. If the potential difference is changed tk 0 ostyj* j8u;-bjaoe 79cg8zo 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 to asvg)/w x+w 2uab

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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 arecw- +;ci g3un equipotential surface.c+uei-g r;c3w

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfay dp *4a6nok(pw-7gdo r h/4gtce 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 charge equal to that on the electrqlx x1ryy/ o-jzc8(lj o yx4:8r2/tchon as :jy 4lo-xx 81/h z(cc/ lrxrjy2 8qtoya 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 unit62nr lo ;csshq3vnbty) )).g:ah35tdue wch5 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 correspondsdd;l 1qsdn 5 npgz,s(f1oq4k. 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 fromlgyo n:dq.l gbiq9h8.04 h 0fq y85ku8j5o qxm a positive point charge is 100 V. What is the absolute potential 4.0 m away from the 5 gxqy8 9ok8 j 5fmu.llqo.0 4 y0n:hiq8qhgdbsame 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 point chargeadlm-er;k , 9x is -100 V. What is the absolute pote ra 9xl-ek;d,mntial 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 V whep*3m 9zl(or cu b+g8yc9*ca+tz0ee eu n a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's c*+t99c+cueu83 myb ez*rp(0l oagzecenter 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 hgj.a2 ml gsdj+gdk5/g-a4 3wis 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 a secodmhas-jg+d5g awlg3g 42j./k nd
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 td nuqip egx6 bt*2-fq mx);+-p 1yjk)xhat 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 m6fyo:qt;1 :uhkdx(f.u2 zw ka

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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 excb18n-,s ziu( norhvv w,t +t9rept that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacita -t81o+ut,b, vh9rvni(sznw rnce

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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. Ifb:*y 9rs:u v5 ez4tuhp6d en,bv1 g2wc the area of the plates is doubled and the distae sub9znvwb*yd gh2r::u c5e1t,vp4 6nce 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 capa1wyf.fjo +67 c( fr+g,lcz4gavl,ix hcitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconne,f 47lrchzac1.g(ff w6+,yjo il+xgv cted, 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 capacitor is weakened, the c1h /pvcg-q*hyv4+am/ pbq uz.apacitance of that capa/*-vhphamcg4yu +1/qq.pvz b citor

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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 capac .af2vv hgh//litor are maintained with constant voltage by a battery as vlhga./h/2 f vthey are pulled apart. 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 arfue2s2pa;m 3ltt;5 uze maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this process?az;5tp22 uustf 3 ;lem

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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/9r/sjlqr 7li dielectric material between the plates of a capacitor.ilj 9rl/ q/7rs
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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 betwe6lo0qpjzuie .o *-d+l6.( tbrm uyh4oen the plates of a capacitor.r4 z.06lm y*opbuqj-ted .o+ hiol6(u What 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 pa3c*)m5ujlf dtper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between 5t* c u3jml)dfthe 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 charged.;sv) 4rcbl 9:s)u fuw 4hz2iof The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leal )suvrc29:bu ohs 44z f;iwf)ks 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 constant chargekz )edt-(ij j) causes the energy stored in z)k) t( djjei-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 stored in thp8v.dqzkm 97y iqa29 xat capacitor toxmy7qz9dvpak9 2i .q8

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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 n:euj4roqs;r7h+d 1wpoint B. What is t u:rs wdoh r74nqje+1;he 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 pczb ;*( vs22j:gngle point A, where the potential is -50 V, to point B, where the potential is +50 V, ipgn*sjcb2: z(;2elv g s

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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 accel,s lakryh0h*t(oh59 b erated through an electric potential difference of 500t s ,abkho0lyrh *59(h V. What 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, b,1ec y+g p f+zkpab/:ryar2 2is accelerated through an electric potential difference of 500 V. What is the speed oy z2a :c,rpe bg/k+pab2yrf+ 1f 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 through a potential difference cun lc*) uah-9of 1200 V. What speed dn-)lucc9* hauoes 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 moff 03xdr-g3adving $8.5 \times 10^{18} \; electrons$?

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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 acc tal/ nm-: .j.h1oomokelerated through a potential difference of 500 V. What is the velocity of /nm 1aj-lm:ot o kh.o.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 accelerated from resh14.rn dy5sagg-0 gmst throu1 h .4rgd5 y-0nmsgsaggh 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 potential differ n,3x(c8x+4k iq4pia gmx ve;oence between two parallel metal plates separated by 1.0 mm. What x3 mn+geq(ckp; iv x8ox44a,iis 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 parallelgkph cjb,6cl) -.ff)u to the +x axis. If the potential j) g6fpcbk)l -.uchf, at x = 5.0 m is 2500 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 ex24 ej/ kn)brq96tcc po.)zs of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the volt62/n)j)eexsp z4c9trbc . okq age 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 anj5c./vul hsq*li)* cm electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the pr*s/i.5jvcl*ul m h) cqoton?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, sepauq 1- jon 8*n:(j2phb ry5qnvzrated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m frohq1 n -unjoz2:85q b( vpr*ynjm 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 battery. An hm+i/s8 j;1c2lpps s gelectron 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 hi +p8p /gsjss12mc;lkinetic 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 connect 1lrw sq4u91jbmh55 hked 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 the positive plate, what is the speed of the electron4hjuq 1 5wh bsk5r1m9l?

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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 towardf9+1gx op7w16s yyvez 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 sy1v p7e91+6 gozxwfym 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 electric8 f ,alfy97.ev7q8m8ii gz p 3 c-zkfvhek0,gw 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, wha80ilezw vm3gf eyfvp z9 h.8,g 7cak8f-k q,7it 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 dm jrqqsi;kb nrjx4g:cb6 /( ; kk24/zpifference of 12 V, it will acquire a ki6 /2;(c/knkkpzqi bjs q;rrbxg4j4:m netic energy (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 a disffp (ib. w79glhc3 -- nptg0prtance 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. Find the electr2a/-cga4v)m mq v +swfical potential for the center of the m4qgc +2fvsv /)ma-awmeter 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 atj0 qlq1x* jhjk7*dr7 z-di6f b (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken tofd-ijzx01h *b6j jqrldq 7*k7 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, 0); zs*yi t5jw0s09y0fiegy+5ta 5 yxlg. If the potential is taken to be zero at infinity, wtl 5ii;zgsxwt fy5y*5gse9 00+ ayyj 0hat 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,l /*beivr7idx,k1km/rr 7wt ) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinm1kwd,ixvli/br *7 e7 rr /,ktity, 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 p:ji -i uf.gx3olaced at the corners of a rectangle of sides a and b. What is the potenfuj:- gix i.o3tial 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. Chargest g +gujq+bvo 2 jpneyyy4b,w tf7:gni +e2..; of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC7jjgo +.+bpty,:iy 2nn.gyf;uwgv bet +24eq . 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, mbp/fw k/fdd px c:or42y4+8wkp4 io7oass $6.64 \times 10^{-27} \; kg$) 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 / kxg-bsfnm:9mC, at the corners of an e b-mg s9fxk/:nquilateral 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 plates of a 2.0-mF capacitor when it is chahm7whtm j -77+oym8yl rged to 1007l+oj m-hth8m my7yw 7 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 hasgvs qb,t:ry *5bl+0x u) usdj8 plates 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 plates are sm j+:kh0 6kv;i1d xxxbeparated by 0.050 mm. If the capacitance ;+kxxxjkmd:i b1v 60his 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 plates0(kyhiu:tnnv tn -mvlbrm3f ::-7we 3 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 ha (9qlg eh h7bz-zb3t-do087cugrl;u is a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between the plq0;9h b 7gzl3d-og(rlu tz-c8b 7ieuhates?

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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-V battery. After the ba9:e-pzm +na2fdw;r b6,ngd qz ttery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remai zn+d2er:-6pg,zbmq9w;a nfd ned 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. H9 pwwh+ofr3; lts23tcow much energy is stored in the ct f3;ot2lh3wws +p9rcapacitor?

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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 energy stos5dm)6 q en)zmred in the capacmq)m 6z)n5des itor?

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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 o+y9l wb +nj,iflows onto the plates of a capacitor when it is connected to a 12.0-V battery. Ho +9n+w, bylijow much 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 m+,fn+bxytqyk p 9lb -b71:py 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 capa2 u) e ykgk9fvk/u4me7citor 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 capacitor co,1qnxobam3 4a(lp o0nnsists 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 consists- +gcl5ps46xu 4tcdsp 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 constrchh55m,sl 52sog c:z gcbe 7j;ucted 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. ndoiism)h4 ec9f14 j 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 50-V battery and becomes fullk.g3* ,krnp fky charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric ha.r,k gk*p f3nks 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; h87thml qc cn;t)z6y to a 50-V battery and becomes fully charged. The bat cc;;q7yh8mh6n)ztlt tery 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 is inserted?

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