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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 not a vector:f 0us*m9(vot*ftz7zn**ylq z njbgd6x- h u, ?

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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 isf4),)x5ppho ffs8uuk5 dc3f l 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 k2 gso6zde89e:dm 2kkinsulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which objegozd8k2 esm6:k d2 ke9ct 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:odcwwkc: wc3v)5pb0s,h5 gy67h w h dric 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 movingcy0(yl zjcln6)cj: )3pwr)j en:6rmv 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 arx( pc.yx4hz;tap9 eu-1yzfs iqd :5a8e placed 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 speellqv(g*qc*gk v./ 6 txd v by a 500 V potential difference. If the potential difference is changed to 2000 V*l l.*k /tqqgvv(cg6 x, 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 at9 ohfu4m+dgpvf 7q1h5 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 0rwl7 i.x1a9 *rpykad8wtal8 moved from point A to point B along an equipotential surface.ll*rwap7y i 0 8xa1at.wdr 89k

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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 be8v -oxt, l3tpzm(ldo(

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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 pnyk w*8i2m7ntr+ 4nyqdm /je7article carrying a charge equal to that on the electron as a result of moving through a p7 n/jd2 t+8ky*4 myq r7nnewmiotential 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 iseyp x-(fl dav4 nekd/v903o7j +a ss;r a unit 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 corrz8-y+ /(h4q ae4sm2 oalpcz fresponds 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 disto3e:g4ks 6m7 zpp xm0jance of 2.0 m from a positive point charge is 100 V. What is the absolute po:7o 0pm kp3 ms4x6jegztential 4.0 m 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 charge pdf o00*pqnx,h 0zs0ynte+pr+0 f5hh is -100 V. What is the absolute potential 4.0 m away from the same point charrfq+t0yhzo p,ph+e*50xf0 ph snn00d ge?

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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 sqyx/ g(d7)vue e5i cs.c: .qsehuare is 3.0 V when a charge of +Q is located at oney)ux:7eesg.i .c5v/(cd seh q 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 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 onytl6sx8b0 zb 5b cgo90z2j7square 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's0g5lbybz 7j 2x609nscoo b8tz 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 two charges +sej gv oowb(zf lp 7n(l8(;/ithat 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 ij2s+t gxq. n0gs 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 respect except thaq wb71++k j o2mjnv ui)a7tzv1t one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has 2q )j v a+7b 1viuz7n1w+tjkomcapacitance

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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 area of the plates y+-ykjnn68te7bt7v o is doubled and the distance between the plates is halnn8v6o-k+ jy7y7 bettved, 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 cdng*; vl *zdb( oc((athen is removed. The plates are immediately pulled apart. (With the battery(gd b*c(v*n;lcaz do( disconnected, 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 -7,xlp);:hepn f59dzk nmc ip given capacitor is weakened, the capacitance of that capacitorekf in 7dhpn )mp59:,pxz;c -l

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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 arevnmgq*8a ,; n1u)jt4 hz* kefm maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charg;ajzmnhm8t,**4g v f u1)qnek e 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,z1x2kpl(mu -k-cexm uvx p1, constant voltage by a battery as they are 1x1,kmeu k c-2pvxpz( ,lxu-mpulled apart. What happens to the strength of 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 tkxmzaz92 u-/ for adding a dielectric material between the plates of a capacitor.9/m-2 tzzuxa k
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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 betweeny 6( ttufe4 1,ajmur/f j9mb)h the plates of a capacitor. W r,at4)ft/mhy9j(ue mfj6 bu1hat 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 pw-l, hv-cz5pt3rktg .(h6 ibbetween the plates of a capacitor holding a fixed charge. What happens to the e-c6wlh i(bt, p tv r3p-.khzg5lectric 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 capacix q4 /(tub2gzotor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the zt gb/(qo4 ux2separation 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 capacitor holding a coj-vn; i g+aqn8cjj3g: nstant charge causes the energy sta +g q3;jng-n v:jjci8ored 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 stored in+drd/,kxv )/ our; hkvd xov0 l+sgy;: that ca:xr0udd/so rvv,gl; vx o) d+h/ y;kk+pacitor 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 tb h8e cn uh0)14bjvp7bo move 10 C of charge from point A to point B. What is the poten0enhbu p)bbhjv1c4 78tial 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 elecxouyrn t.8v:hd3(ansc ze x4z5f) ,k(tron from point A, where the potential is -50 V, to point B, where the potential e vn5ua c s34n)yxh(xz:rk,od8(f.ztis +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 electrikzd4a:wzl;vot 6/ va .(8rq hac potential difference of 5kz/q vl wra:v;8h4d oazta.6(00 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, is accelerated through an electric potential 66eihvs0a .njdifference of 500 V. What is the speed of the protae iv.6nh 6js0on?

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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 prx)fy/6tsk)/ cjjz. hw oton falls through a potential difference of 1200 V. What speed does y )/) jfzjhwsx.t c/6kit 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 mob5 da bt./epwjl8z) :3u.lcsi hdp9 v4ving $8.5 \times 10^{18} \; electrons$?

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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 acce+7( gomsqfz ss 37eh4nlerated through a potential difference of 500 V. What is the velocity of t 7f4s z+o(e37sngs mqhhe 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 rest t;gdyhhgt12 1tezq c(1g9xp g9hrough a potential difference, and afterward the ball is moving at 2.0 m/s. Wha1991z gcp thehgx1q;g(2tgd yt 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(;z :fb04 d4j3rv.chimtiqoi two parallel metal plates sepad.i:0co f3h4 ;mtbq4riiz (j vrated 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 i. nwxa.7ap u0y.x 8tcof 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = awx07p.uxy 8ictn ..a2.0 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 towarxg xz:rs/*p ;s rz7l4kd the east. If the voltage measured relative to ground at a given point is 80 V, ;*zxx/s l4z7krsrp: gwhat 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 elect l+75cea3j mcvric field of magnitude 3.0 V/m. What is the change in kinetic energvcc+ 7a5e lmj3y 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 mc0*iaa hfd)v +, are connected to a 12-V battery. An electron released from rest at a loca* )adfva+cih0tion 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 to a 12-V battery. An 5 vs2n4dbszczeqn( 5+qw2iv+ electron released from rest at a location 0.10 m from the neg esq 2nn25+z5zvb vs+ 4w(dicqative 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 congath iz4efnjx9u2(q+a( c/ ;knected to a 12-V battery. An electron released hnkz(;qf/c(9j4+gai xuea2t 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 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 toward0c2q25u qf)y36axm1ygu ojomh 1 in,n the east. If the voltage measured relative to ground at a given point in the field is i6qnha2xnmgq1 m)5j32yo o u 0fc,uy 180 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 directed toward ya9 k-ljfgu)/c8j f p1g.1qke 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 afl8/j9kceyk1 g -p1jugqf) .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 acquire a +d 6muk w0hgo:kinetic energy (in the absence of g :6dm0ohk+wu 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 distance8dbs 3ddt/l7 u 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 eigo s5nfi g7hasb6bx t 0c4(f:5+);qky rkur-nds of a meter stick. Find the electrical potential for the center rxg-: n06fg c(k bi+uak s5f4iy5)7 ro;hbqs tof 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.it c 0o-.mgv5l)ab0/z dd n1lu0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is a/gu)l 5 v.bc1d0mi0lod zn-t 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)x4t wq+z,c x(ihmv17 m11c rcq and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinitzh1rc4mw17 1qxx(+c vqt, imcy, 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-n; j+nj/ jca(z;8jrm lq9hedo*C charge is at (3.0 m, 0). If the potential is taken to be zerj 9 ojnle/8(j;* a hdmq+rczj;o 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 arehas, r.qc/gk( fll a gp)07l*9:gjwgc placed at the corners of a rectangle of sides a and b. What is the potential at the center galg( / p f*wha:l.09g,cljcr gq )7skof 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 diagonallyms q+)g yjyl-dr1k86 c opposite corners. In the other two cor+ydm8lgj y6s) qc k1-rners 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 16(;twxjg9dh8xlc 1lutc 51on sw:u e+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 charges, each o7tmf +/ oee l:gim)qx3f 2.0 mC, at the corners of an equilateral triangle of side )t:7milfx3e mge qo+/ 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 *xpef 5 2tbgi zwz*d:;when it is charged to 100 V?:;fe digp *zwx zb5t*2

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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 plates of a.l t,5:cm 2mzy83mxtjqtu e/rrea $0.50 \; m^{2}$ 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 separboag7v+ ek;) iated by 0.050 mm. If the capacitance is 17.3 pF, what is the pgvioake +;7b)late 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 ofbj/ *re+- 8vr*koqeobb g*y( slq7nn4 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)d:q0vk1w g(lwhl3fy separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top platelh 3vqkw0 wy)gd(fl :1 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 connected6 8( e)i-u;qw btmxt5k-eeiko across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transfo5-k uo be 6qtxkw(-8 ei;)ietmrmer 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 mF capacitor. rgy3d0cc i y :dlfp+m f a2k*f+r2b6*aHow much energy is stored in the capacito3fpia+d d r6 :2c0bcflfyg2kr**m y+ar?

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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 s8bqme1;eep7ej t9+rp tored in the capacitq+ bp9 ;jp1treme7 e8eor?

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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 n(aud3; cfmqq,l9swy gvc;mb62jn;7 it is connected to a 12.0-V battery. How much work was done in charging this cav2m97dc3l(yuq,s ; jf6 mnbqw; ga;ncpacitor?

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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 it sto+7 po4fvp: pct5bm3rl7wpsmt*vj+ e: res $2.0 \times 10^{-3} \; J$ 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 consish6)ld t*n;guz zww/n72/chs bts 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 of plates of ar t(7 ixff r;thp:uzk:9ea $1.5 \times 10^{-4} \; m^{2}$ 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.azp d 2c)w2m/ton+n 9zpc ma- 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 constr:gax dznw 4 1xaq2j,+aucted 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 n,)h(b 9ymt-qbk 0svd.x nw g;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 chargedijyln8 4 ,gx8d. The battery is removed and a slab4 inj ,8gdxy8l 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 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 connirs9b/+c0 hjtprpm, 9 ected to a 50-V battery and becomes fully charged. The battery is 9m/rbs0,p9t+jir c ph 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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