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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 n lzovoo/5-,u eot 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 coulom;gx9af9mot ( wv.ack e-y(dl7b is 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 o;pl2fuf0 jtd 1o ryy/3bjects are insulated from their surroundings. Object A has a net charge of excess electrons. Object Brydufpj3y f1t/o ;02l 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 rjpefvweb5)k9 (f imnfoz4 f174/p9a the 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 direction oplf5q i;rzg maia528)xn;c tc(posite 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 hollow coz lag,;e.wczmo;:xq)w(rt 2gnducting 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 restmt38jojdv +2q to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what willjtoq8d2 +3vjm 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 refem42tf6p/mp d 4mwk /i ow*5ata79vrydrred 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 mirhf un;z38 a7f+u+uooved from point A to point B along an equipotential surface 3+o7;ziuau+unfr fh8.

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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 be- 2svyy,d ysg6

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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 carryint,2x id8xbxhq, ;mln* g a charge equal to that on the electron as a result of moving through a potential difference of one ;b,qx8nli ,m*xh2 txdvolt 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 1; d9g,iri5wmhrn-ktjnk-e. 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 corresponds8lc oo4bwqqb/3 o +flimi. m*1 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 charge is 1l4vi+(98qxvc do j 7jf00 V. What is the absolujx8(47+f djvc ovi9lq te potential 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 pzp77n,dp )gobt:cz y)) qj3gaoint charge is -100 V. What is the absolute potential 4.0 m away from t)qzg t7pp,by7g dj)onzca : )3he 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 lgx58to0dcf0 the exact center of a square is 3.0 V when a charge of +Q is located alt0o8fcd gx50 t 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 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 cej:muidbchm +k(d6h.fw ,v 0i1nter of a square is 3.0 V when a charge of +Q is located at ivm+cd(bm h:1u, wh6f.i 0djkone 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 always consist of bjf7ca(n/a;b 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 volt5e(y+ k, gjj5.smgs dg is 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 that one e ou2px20bp*u05ihh f has twice the plate aru 0fupo02b h*2e5hip xea 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 o w,,jflpdov 5.r2hl5sf C. If the area of the plates is doubled and the distance between,sj, w o2dl vr.5fh5lp 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-planze ;l.8qyz w+te capacitor 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 difference between e l.n8+qzy;z wthe 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 weakeney6zulhcxa*i7sm, el-dh y 5kp75; ur ,d, the capacitance of thz6* 5a ,lclxsu7- i u7;y5hehdp,rm ykat 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 paral-g)h0 zo6m w9gqyzy6vlel-plate capacitor are maintained with constant voltage by a batteryy-v gzqom60g9 z)yh6w as they 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-pladj p5 */mqan 4+qbhm) l3kx7kxte capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the akh+pxb)3 4n7xj5mqm/l * dqk 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 /te0r y2+(pe+ccy/ xp,io/ i:g ltnmefor adding a dielectric material between the plates of a capaciei:icgp(/x/e0y+ c ,t/2 tpoy+l nmretor.
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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 between t/k7)lor6hez+eq hd/ the plates of a capacitor.+ /7r)oheq /tzkh6de l 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 pap ya(x 946yxdsof op3ym1+ zwn9er is placed between the plates of a capacitor holding a fixed charge. What happens to t4ydz9ao1+ xf(y3 xp6ym 9wn oshe 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 become) bnsdruioeu6s+a x3f:wm1ky24,t ,es fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks ofbt:)n4 ewu2 3syr6odm,,k i f xa+ues1f. 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 capap2mvjkqrbs d t4* +*g2citor holding a constant charge causes the ener *42bm kd st*vqgp2+jrgy stored 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 give7-hngh/8-thf:tu(nq y c d-rbn capacitor causes the energy stored in that capacitor t hdn(-qyhr 8-ncf /t7g:tb-uho

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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 o ay8b nmu,cor8 og-ro-a(f:9lqmw) p1f charge from point A to point B. What is the potentiabulcao : 8r 9(,p-mnyg)fq81wam-orol 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 p1/z/z w q.kw 9yejfd+df18czmoint A, where the potential is -50 V, to point B, where the potential is +50 wjc11y/w+k/ ezz.qd8f 9zm fdV, 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 thr 0;qkbc9h1b whgb d0k*ough an electric potential difference of 500 V. What is the kinetic energy of tgwkhb91 b0k0; *qh dcbhe 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 upi s 8;*2nrtl..rk.yadr-a nrest, is accelerated through an electric potential difference of 500 V. What is the speed ofa nu- lda.t*kynp28.i sr;r. r 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 potent3 9/q1 wss2i 1xcjegbvial difference of 1200 V. What speed ev3b /qi 1gs1w2c9sxj 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 do in f2+d0b l,q6qbmgl+ fzmoving $8.5 \times 10^{18} \; electrons$?

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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 potential difference iq fgg8ko3n ( rxi+3f8of 500 V. What is the velocity of the3 8knigf oq+3f(xi rg8 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. Thjgo:, zt)6g1 w, krnnke object is accelerated from rest through a potential difference, and afterward thr)g6w, gojknz,tn1: ke 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 difference betweel pxb 7: ow5ha:-4 szzc1if n33fiiwn2n two parallel metal plates separated by 1.0 mm. What is toc4p3 z:5h3zs: w w21ilf iixbf7 -nnahe 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 pa5 0 o*vfknu)e/ui:81tuda 1vb tzil6 mrallel to the +x axis. If the ut/8d)ioi u1ez:50fvbv*6 lantmku1 potential 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 toward the easvfw :ws5 79ghossxuc 9/j(l 5ihk+d 0bt. If the voltageg7jhs 5oxsc+l9f /b9k w50vui(d sw h: measured 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 m along the direction of an electriylb0 mbwt7o9 (r2 s:fuc field of magnitude 3.0 V/m. What is the cbfm bu ys0o:tl97w 2r(hange 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, separatedmtdih5 8o6r 66v ygwz: by 0.20 m, are connected to a 12-V battery. An electror5wt86g d oz: h6iyv6mn 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 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, sepaw+wil7 oia/d0rated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from thed/ow0w7 a l+ii 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 conc/jri q 2)mjz*/vk*ubnected 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 electro/j)rj*vqckmi 2z*u/ bn?

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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 eassqg nz (lm4xbw9f21 3pt. If the voltage meas3(2 f9slpw1zmb4q nxg ured 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 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 toc z34 .v6b/.tt cg+,tz6 fnrvvem p6ddward the east. If the voltage measured relative to ground at a given point in tt c zv.rtn366,tfp.zdg /v6ecmvd+4b he 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 wil-vz8dsr+d n ;t5jg3 3y:ye eef-,qcyyl acquire a kiz 38c5 g;e e y yy3-rdn+jvsfd,-yqte: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 z cdyrrzb0 *6.at 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 at9cpfb.fiw q, 8) 9ri2v w34vxu;addar the ends of a meter stick. Find the electrical potential for the center of 4v dairxui8)pb,v9 r9f q2f.awd ;3cw 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 chaeqa e/kh w:b ;te13tx-rge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4weeqtt;1b- :/kxa he 3.0 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). -s:yaeh -/jm5 ky xa;c If the potential is taken to be zero at infinity, what is the electric potential energy-yaj e5;h ak m:y/-scx 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 1bgi5xnc -p:g(3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to brigx p1 c:-ignb5ng 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 a rectang y344xjhsln+d le of sides a and b. n+4syhxl 3jd4 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 +4l yv1k )5kfo(l.0 mC are placed in two diagonally opposite corne k f1oyl(5lk)vrs. In the 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 (chwanoxt.s0g33zw;*: iac w : vcarge +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 necegy p)3mm2pjr 7ssary to place three charges, each of 2.0 mC, at the corners of an equilateral triangle of side 2.0 c y7j2p)mg rp3mm?

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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 te )m4d2jeea ao(l2l 4bo 100 V?e ed2 44(a)eo2alm jbl

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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 areim/ii e-l a(lwufz8.( a $0.50 \; m^{2}$ 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 separ,j3zjl fiq+glp. 2px 3ated by 0.gl j,23zxf+ q p.3plij050 mm. If the capacitance 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 capacitp*ycqhm 7sn n 99(hqu(v c28szor 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 kt yj,ce1epf 3t:; ykoy-1)nx5.0 cm. If the potential difference between the plates is 2000 V, with nok ,tft)e1 p yyyk31jce-:;xthe 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 across a 100-Vhe . ,segykr:7 battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). e ,sy.7erg:kh 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 e+ 3ix-y3qc wtplaced on a 15 mF capacitor. How much energy is stored in the capae yc3 wq3xt-+icitor?

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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 energym7**jeht ez p7 stored in the capacitoe e*hm*7jp7t zr?

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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 onzs:. tgnii/6ykjf b ,,to the plates of a capacitor when it is connected to a 12.0-V battery. znt:6 ks ,gb fi,/iyj.How 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 so6jf7nt5kb80cn d ,n ay that 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 capacitor consists hwxh) 4*8wa ceof 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 area :+-66aam bo nexbcp m($1.5 \times 10^{-4} \; m^{2}$ 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 area iny,l0 6;q ivuk6op. t$1.5 \times 10^{-4} \; m^{2}$ 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 afle(j; h ybs.7rea 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 cont7d w,qg*+ 0vr7 x g0voqcqrsk c8h)/brx8ft;structed 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-Vk2(er(11-my8ecwqx- b xuu hb 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 constant of 5.0, what is the capacitance of the c-we(u2x rbh (8x-ye1qb kmu 1capacitor 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 ga1 .ab 8pkts py,s6 l0(oyuc4becomes fully charged. The battery is removed and a slab ob8pg64k,.u0 oatl sy 1y(pcsaf 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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