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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 followin u1ldaxymd14/g 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 is au 5 .pxpk;ay10dvk yl1

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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 surroundi14rtr 4q+vepj (m k 2d3:lonjbngs. Object A has a net charge of be42:dj +r1r4pm( j qlv 3notkexcess 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 electrz-5htb olny* ;x 1 zh ;;z)c17jlugtxdic 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 movingq 26k ei*xm,3iq j8bkh in a direction 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 plj/qe4t ze-g8daced 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 500 V p7 h(0,w(ezbzgcfo op )otential difference. If the potential difference is changed to 2000 V, what will g p,z0hec w(7fozb()othe 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 a4s7 na5)aq -qzb2bsmv ll points 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 point B along an equipoten19 w6diw:+z *ppzhqmyjt 0+k9ob 5wcotial surfacwho9+mzyz0 1p 5: kw cd+*p 6wqbjot9ie.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mustea ,v azuv26cz h/1nq9 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 tok3sjt*v q3 dn-ey39 jc that on the electron as a rety c nj3s3jk-qvd9 *e3sult 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 g( +pw l9+1:qsn:3hlat yre/if- nziqof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corl:l:y d*wht1qk0* tt(d*p 2x,lrzbyaresponds 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 2.02 kz7( fmd:f4hrlt+ qf m from a positive point charge is 100 V. What is the absolute potential 4.0 zkdfl:47h 2rf m(+ qtfm 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 negative point chargqk w6qf28 ff5ie is -100 V. What is the a2qi5kf6 8 ffwqbsolute 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 exact center of a square is) wvs*.el1i h.vx v 7p y+bg+b(whxy;n 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.+pbx h*s nh ywlg+)i.v;ye(vx v 1w7b 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 thcxcr/2qb5z 2usrunz2omgd86 x7 m1 :n e center of a square is 3.0 V when a charge of +Q is located at one of the square's n76cr5 xdgns:c x1oruq2z2/b u8 2mzm 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 always conig zdqdp y ,;;aixjihe7--6m /r,my6nsist 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 i+j:rbzefe t02s2wc1 mhzz r89s 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 evei.l*,0(g mvkq gnve 0mry respect except that one has twice tvv0q (g.ienk,gml*0mhe plate area 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 capacitance of C. If the ar-mxh gv+ u x 5li(06.hqnwd4ylea of the plates is doubled and 5igvn -xh.(m4qh6u x lywd0+lthe 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 capacitor fully and then is removed. The n0ry h4 iw, p5d;qs*w54os sokxlm78mplates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) s ysn485;p4 5hqdmxwwl, ms*ki oo0r7What 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 th bbiqf.v+ rpsu3*;6sb 0tz ak,e plates of a given capacitor is weakened, the capaci abpt+svq *ibb3,r6zk s u.0;ftance 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 parallelt t4q*d(cf p( au3dip:-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount oc:pua34tf ((qdtpd*i f 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 capacitor5xzq :t*ow.fe are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this procew:zt5* x. foqess?

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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 dielec*d1nw f3acf c ef lno)3e/;t4otric material between the plates of a capctfac1n;4fl ed / w3) 3feono*acitor.
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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 )n 2nmzlnp6 u0is placed between the plates of a capacitor. What happens to the cap2zulnn6m )pn 0acitance?

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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 the platw8b 6jdg+/6 ut,by6mxm 9z ayd1xy*bzes of a capacitor holding a fix d8 6*yazbmgx 6my1dbzy+b w9t6 xu/,jed 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 capacitor is connected to a battery and becomn4hgfb /st2 d)+l p6poes 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 thi+/ 4ho)pt gbfldp62n ss 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 charge can enszrk44:0a1l h6w auses the energy sa0hsaz4l :n14k enw r6tored 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 capacitorpect,dyqx89sfcctnhr 20 g,da* xf/, 63 l*dt causes the energy stored in that c,p2hlsfn t td38egqfc9*dyd,c6xarc0 , tx* /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 from poin;xsx g rv16fg7t A to point B. What is the potential difference bet17 f;6srvxxg gween 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, mp)s yq/d ,q.sblkru vy-54b(where the potential is -50 V, to point B, where the potential is +50 Vb.ul54yd/y-) s vbk sm(qp,rq, 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 u)s8f fdc2ng(an electric potential difference of 500 V. What i8cgf (ds) fn2us 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 accelejql9*qp r9mh;* j6 ebisuq9) lrated through an electric potential difference of 500 V. What is the speed ofqmiup9eqjsl rh lb9; * *)9q6j 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 of c9: p b;t k m)soyv;zou47ygz.uh h;i hp,tp:/1200 V. What speek :;pp ut9spth) miz : hyv;4c;7yohubg/ z,o.d 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 doy zy qxy2p nh.4ak6z2v e6n8x8 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 d og,ujy -rec9ur-2x:r0o;ln accelerated through a potential difference of 500 V. What is the velocity of the electron aftr ud;e ,jo2colyrr x:-90n-ug erward?

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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 okk,-mkzm*a bx /xmz:+f 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnik*kk am:b, zz mx/-+mxtude 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 twos4)l4lh je zt3/u e/t.v 5mvd+co g0uw parallel metal pl4)cdueo/ mej/4l+5.l ztvshw0gvu 3 tates separated by 1.0 mm. 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 magnitude of 2 /awe u9fr772jdfx 3womyshv k1(br*500 V/m, is directed parallel to the +x axis. If the potenffry3h 72mb/97(1r2 wasvx* ewjkudo tial 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 of 50 N/C directed tfpw4ysc*p;x (oward the east. If the voltage measured relative to ground at a given point is 80 V, what ps y4f* wc;xp(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 direction of an electriq(mma(b . i j4;.8sruk 4uiakbc field of magnitude 3.0 V/m. What is the change in kinetic enerq.iak(sik.um a4u(b 8m;br4j gy 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 by 0.20 m, are connevyym(*c1s ju ooh2wa9q7 xj6,h 2jzw: cted 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 o,cvqwu j92ayh:xjzyw2s o6hj* 71 (mfrom 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 batter.rwn +rylps mm ;1 k*28vhd9ioy. 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 mkrvm pr*sn2yid8m;h +o . lw19uch 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, aut-c vd4o )es4re 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 att4o-) dsv4e cu 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 m4zl u(.z4hv rtoward 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 east of th.mzzvru(4h l4e 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. Ifb :q rq63swg4a,9fty q the voltag, r:6f sbqqwyg 934qate 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 diprt0wn /bm sn) g j4woz535kl;rz)w ;qfference of 12 V, it will acquire a kinetic energy (in the absence of fri0z b)kr/ ;wnr4 pj5o)53ns w wmzlqg;tction) 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 atk.1g9wh / cqd h7ssd/f)cxt+t a 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. Find the electrical potms/;-//ml /in, n rxwq9oavuhd6s)z wential for thmdus-on)/rq6/ mi/a;sn hl9w x z/vw,e 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 -2.0bbklj/y ry,*n-eg o(4-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at p ,ynb *-j4(yobg kel/roint (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 diz65 c.9zlpq -2.0-nC charge is at (3.0 m, 0). If the potential is takz6 clz9.qp 5dien 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 charge is at (3.0 m,qch1 19zswa:vky2 + qr 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 y1w+rv9q: czah12kqsto 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 a recxa-yxnp9l i u-s o7 qi4k*9)xetangle of sides a and b. What is the potential at thepk-ias x7o*-x)9 iq9uney lx4 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 are placed in two dia3 y/kzwa2a mt/ke0(k mgonally opposite corners. In the other two corners are placed charges of +3.0 mC andamwek k3(t//z 0 ay2mk -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 (ch3v;p)*bos ewg arge +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 chargeshlpomh;)pbb s q2;8;p , each of 2.0 mC, at the corners of an equilateral triangle of side 2.0 c8bh p)psbomph ql2;;; m?

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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 +n wg(92mo5t-f w-uu j*yw-obi*jjey to 100 *i u b (2o9-*uynjweygm+j5jwtw--of 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 capacitom1/3(b2f k)e4if tktqti dvk 0r has 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 ty/4m3n saq78tlfd 5syhe plates are separated by 0.050 mm. If the capacitance is 17.3 pF, wha/8sydy s3 5f4 nlatmq7t 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 plateg( p ny zk9w ysq/kye33jcw:fba/-5t;s 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 separati80n *qqpbaq)wu)3 g n ec6ykrk+ z-4qron 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 plk nk)cq ur zq4 q*n6beqp83g r-)w0ay+ates?

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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. Aftcr9 pkf)d uz1anvmj4trg, lt t)zel5z3*, 56her the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much1,9tk 5pj),zu3gfalh5*v zrmentz) 6 td rc4l 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. knf8 8q)bc:: rtk dn;;fsl g,yHow much energy is stored in tcd, kf 8bs;:n;8tl: y)r kgfnqhe capacitor?

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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 stored in thef; y)a, yjokmrc :5+v);wejmg capacitoramr,yge;:jyjvf)+ c 5k)w;m o?

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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 flb7 gfrlw 1k5vi 7l+cn+a2ch- vows onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this cab2 vi+-1l+rv7 hf lcw7ng kc5apacitor?

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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 itembpstlzfuebt/k /8(4/ c8 o ;wl g-0a 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 ovo8 j)qvbj w+,lw. e4wf 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 capacitqn cv) p(.4h xhjpk3/xor 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 consists of plates of 6i-isejr p qhd;lu2z x/u32:varea $1.5 \times 10^{-4} \; m^{2}$ 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 capacito ys. 2)*e fz5po-wtgjjfy0vd z ;w2y(ur is 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 is3 gpq )2 - (lhaqq7s7rrscf vum5y7nc, constructed 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 fully charged. plxdaqji9 81 s*hh 2n7 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 capacitance of the capacitor s 8h9*7h in2q1 xdlpjaafter 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 fully a)* o3p6ykslmcharged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a die*yoml)a6sp3k lectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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