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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 vectoywb-s0h+tfux q g0s,,r?

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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 ikwf fw8mw-)+* q6p xslv7yq0 fs 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 surroundingsa c63/t(kai xr. Object A has a net charge of excess electrons. Object B is grounded. Which object a/icxk a(6r 3tis 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 t jbm/0dib , h*ah-nw b0b9:arghe 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 direction oppbp+rnm68+ geq+f( ok1gp( /p mvsieb0osite 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 placed on a hjw)9oav8 6y2;(p.lu5bkr h5irw eah jollow 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 58tkp/7(ivcgg 9f;x,gu zg4k q00 V potential difference. If the potenti4 ggugvq pfxi 9(gt ,kk;cz/78al difference is 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 a2xvr+ c0r19wc(z0 o*wfcxamxj.5e bx 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 equipotg.9j y d s29qp-ts,feb 5g ejl14n;tqwential surfacttpe e49nbj5l; q1 , f.g s2jws9dgyq-e.

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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 )clv,f, ys.4)q4 r uvwux re,od9m zp5be

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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 elec-y6qjzv -)q jwtron as a result vw 6q y-)jjqz-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 uni7dhgva2b jy1 f,6.k xdt 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 corrt8o nmqpvnk;;83+lm qesponds 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 distan1ay 4u k hf ygbz8kg0o12dd()hce of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away fromkofyh 0 bkuy z4hdg g)8d(1a12 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 dwk/fk+g hx+f3y5 n l(psjdv(zi .w5 o1istance of 2.0 m from a negative point charge is -100 V. What is the absolute ph1(z +.fps3n kd ky oiv+ j5x5/(wfwlgotential 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 3.0ymwo5/ +yy3wd 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 iwdw/ y53m+y oys 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 racocs)f:,i6 center of a square is 3.0 V when a charge of +Q is located at one of the square's s6iao,f r)c:ccorners. 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 ;pz +eze5*ucg 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 iqa(*)yozd6+fc )bf4 e l yjz9os 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 y84oa si :l;isexcept that one has twice the plate area of thii:soa8 s ;4yle 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. 1f7gee sj-3s avg2av, If the area of the plates is doubled and the distance between the plates is halvf23es- gjg s7ae1vv,a ed, 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 capac 8y /0log iq yf9nienj9rxa/vl:f,16oitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential differeaj8yv qn /6:9 e fi0ix/rg9loo1flyn,nce 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 gif*wpi1* w46f kqk3d k )mpc/hpjj30r oven capacitor is weakened, the capacitance of that capacito)mpkqfk oi w*hpd r634c*fkjp/ 30w j1r

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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 maintusnq) 85txst,*7vr hnained with constant voltage by a battery as they are pulled apart. Dux,)r8t uv s*hsn7q nt5ring 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 are mainteqqqr3z, v0:0 hzbn.o ained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this pr03ho qqbvr, :qen0zz.ocess?

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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 l g1o6w .v,e:wl7er5 ap/ox daadding a dielectric material between the plates of a capacitorwdw7.:vl/ lgx a ,5pa1oeeo6r.
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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 placec5czyesao: i28-i7 dfq9xa x4 d between the plates of a capacitor. What happens to fi zo5: q8 iay2-x7xc49decasthe 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 sufe5bvtvr-.kq h()wmv y+ x71 n r,3 lk2wdnxl.ch as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between thelxx 17 r2w+,n.vynrt- lqk v)f v.5dhe wbm(k3 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 battfo( xmj,f 0cr b53/uezery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is in 5rjmxefz(0fb3o /cu,creased 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 constant charge causes thesdbmk9i8;0yy q p(-kd energy stored in that capacit;spi(d8yk9- 0yq kbmdor 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 i m+0+*+yqpog2hljwksn that capacitor to +2+lhpw qj+ osgymk0*

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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 pq ; gm6/+3x+qosvpsn9g /plcdoint A to point B. What is the potential differen3x/gm p pgl;ocn 96+/v qsqd+sce 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 electron5/ y)iuls f6cou4w 2hf from point A, where the potential is -50 V, to point B, where the potential ifiuwh/u2 6fl5y os)4cs +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 acceler7u w25 np6d2 lfwvboobb/7ok7ated through an electric potential difference of 500 V. What bf5 2b6kd7onp7w/ 2 wlu ovo7bis 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 potz)nticgu-dq,a-ja fmpa2/ d6r 5 /e g8ential difference of 500 V. What - /agarndeac-u /di8gt fp 5z6,)qj2mis the speed of 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 o )-,9tcww -4f pikv)caea1z pff 1200 V. What speed does it acquice-1)p-wtf w kpf) z,4ia 9acvre?

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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 6/ba dwwn ,fc.do 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 electro+pe:n6yt /5mgq 7qn ion is accelerated through a potential difference of 500 V. What is the velocity of the electron+g5n 7n:/6mqqeoit py 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 ch0 wr7twi l;;cvarge of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving w0ir7c tv;wl ;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 tduc :6l0tq4vh he electrical potential difference between two parallel metal plates separated by 1.0 hq0tld:u c v64mm. 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, wvbjgdu: 0.c)with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential atg). v udwj0b:c 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 toward the eah. 5s rrx m3,/ieur/mpst. If the voltage measured relative to ground at a given point is 80 V, x/s mr,ri/ue h r3p5.mwhat 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 electric field ofxl6y5ux a2k+ r magnitude 3.0 V/m. What is the change ryk5 26+xlaxu 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, separated by 0.20 m, are connected to a 12-V 31u+sjeap(7jxwms z6 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 from the positive plate, what is the potential difference between the initie az63xpss j mjuw1+(7al 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 ai6 - urvu u:gxyr983-ou-ic ao 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 pl8 orir uv-u9ix3 :g- -u6uyaocate, 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-k4m77vzjh fw 0.20 m, are 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 at a dist7vm7 k jfwh-z4ance 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 the ea:hy tc ,:7glgrst. If the voltage measured relative to ground ,hc:rgt7l:yg 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 electric field of 50 N/C direcal sw4qxct29;yg*tgw.g, (i. lg ucj4 ted toward the east. If the voltage measured relative to ground at a given point in the field is wx.l us.qywga gitc 9j;4(gg*t4c,l2 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 tf08 :da0ztt-pvcv ;e ehrough a potential difference of 12 V, it will acquire a kinetic energy (in the absence of friction) ofc8e a;-vtdt f0pv0e:z

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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 distance of8v/xq(nz:q1nvtt* ws $5.0 \times 10^{-10} \; m$ 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:zbsv ucl6fzh 75e g(6 electrical potential for thufb6 (7gzl:hszc 6e 5ve 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 -2.0-nC charge is at / ot:bg zlyo)r3j4,legf3e(z(3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric rtg/zoz oge(ly 3 3fb,e)l:j4 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 cham:gs ;q7m;cs ,ch3tmhrge is at (3.0 m, 0). If the potential is taken to be zero at infinity, wh:qmsc;mt7gshhc,3 ;mat 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 ix8j rjfk9z( s bt4kqc :,kvk z*qk5:1ms at (3.0 m, 0). If the potential is taken to be zero at infinity, wha:c tj kz9kqb5r4x k*1zf,s8m:qj (kvkt 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 +qsn(tbgetm(q pw26z87 are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a q t6zes ((p m2b8wtn7g= 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. Chard:px9,xta7u:j kva4:sk y nj)ges of +4.0 mC are placed in two diagonally opposite corners. In thyn7j::uk pxjs xt9ka d :4,)vae other 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 (charge +2eoak fqw.l 12)uj sv7)o, 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 of 2.0 mC, at tx8gqqkc -7n, yl3mz-h he corners of an cn ,m-l-hgkyxqz37 q8 equilateral 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 chasr;. u+7o w2db1e x5 nruorea7rged to 100 V?sa7 ode+;be2rr5nu. x1o7ur w

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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 hasmcrvood2 whj7md-:5,xexw,3 5s ssx1 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 pljc2.hhb 4w+ndsd:kz5wc ) q j*ates are separated by 0.050 mm. If the caphk .bj +4*h:52dc)d wcsnzjqw acitance 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 h-n:t)m, a4tigq* bqikas 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 hasusjr;9 3+a -qmo5l/klv pdn 0m 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 plat +d9 vo5 an/-mmku;0qjpslr3 les?

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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 bu h*r7sah)q4b attery. After the battery fully charges the capacitor, the capacitor7)hr *sbhu4q a 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 placedkr 0y1g)vqzx5 on a 15 mF capacitor. How much energy is stored in tx ) q5zv1k0gryhe 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 cap1 dmjnvf* 62s,bbnq59) qo;ix8h ykmbacitor. What is the energy stored in the capacitornm91y28 v,xq*bmk 56ihd j; so)bqfbn?

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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 tafhb 5tnnmz mml)aiwm4k./h 5 7(ims09 pj.+ehe plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacm4sinm) +9 anmbhf5ta/. 5jkm0em.wh7z (pil itor?

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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 storebp*8 k5 7)3i nlay z h,gynhg8+fhka5es $2.0 \times 10^{-3} \; J$ 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 consi e 3of+1zl*7;4nc c ;juaxivfbsts 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 capac,s0cz yj -5it fkt:,zvitor 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 capacitojq z:uu: 3x97xqrn 0j odeq7l1r 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 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+znjow n6 j/ylt drtuw,:)1z( 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 byy6 wg( ,hckgsz-j1-is 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 batte 4i3,sirprt,hz yss )dvc 3-t+ry 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 constant of 5.0, what isd-+sr icv3h s )tr3pyzsit4,, 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 fully cha; h01qu80xpgu muk0pjrged. The battery is removed and a slab of dielectric that copmug pxj;u q 008k0u1hmpletely 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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