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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: 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 following is nof0hc 6do2o 0q6eqzm ,kt 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 9djs0gk n)c4

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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 surroundings. k kesh7jgd.(pq :e .x*b/de m9Object A has a net charge of excess e: k.e/7edb(xk q*.ph md9ejgslectrons. 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 electricu9.vuwmx( cyl n;s52s 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 opposite to xo2ym 87ch i)p- re1;g3gbtenthe 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 hollowjg4szdb1a(/6pq 0f2iqqubh + 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 r2vzv4 yo:mg4500 V potential difference. If the potential difference is changed to :o 4y4r g2mvvz2000 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 pc1cjicj b/: bq;u)y+ kn zc8)zoints 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 equiaqp 2 mcph/f).f7q r-npotential surfaceq a-/7nfmrqh p .)fp2c.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface musbf(-o8g g-yv pt 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 parti d(qkp ia:+v5m1xx.fjcle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referred tjk(vx .qi: a5d +xfm1po 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 u/ kqpv w;)d 60d )8yikq*gp tc;bl7jyqnit 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 corresponds to/ podw;jav*;u ,i cj4c 3wrxs:

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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 a7 7r7 d1ead4pxdax3:cvqz k+charge is 100 V. What is the absolutepaaz xdcq17 +dea:k 3d47v7xr 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 point ch sn4kb,;.a nyfb46ruharge is -100 V. What is the absolute potential 4.0 mb rknu s4.y;bf46h,a n 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 cente1 vjg,9c-a4qo wjht3d r of a square 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's center when eacwc h qo1 3j-v9gd,aj4th 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 is 3.0 V when a chargeccg1qb j8/8x /iundb eiehdw9f *v2:8 of +Q is located at one of the square's corners. What is the absolute potentialfb 8neb i 2*cq/h1ejxd8 8gid/:uw9cv 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 citp5xwip3 d+ merk2c1ct(va ,br )g :)d-cu+d onsist 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 isl6g1 km*yr6b mnu ,l*ty,/sgm97ayp w 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 ha/diw x71.ppfz(bdi/ 2bt(xlc s twice the plate area of the other. If the smaller wdxf. d bti7p 1x (/zpil2(/bccapacitor 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. If2 .fz93lpchr/ydbs2a the area of the plates is doubled and the distance between the plate zac ys/2h2b p9.r3lfds 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 fu2yr7/ mfi7)e f 2 -hal);ggn6me ftxmxlly 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 t77fg f) r6my;h am2mn)gt /el2x-iefx he 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 betw n*qlv(oglf/e7ylj ((een the plates of a given capacitor is weakened, the capacitance of that cafqj(oel7nll /vyg (*(pacitor

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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/7 wfripw5d 0ditor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount ofw0ifp d7r w5/d 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 maintainedqh5wcq. e1 +pv with constant voltage by a battery as +chw pv1 q.q5ethey are pulled 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 for addv;g l8dh;9 ai 4s(brpcing a dielectric material between the plates of a capavd; (4hsbl 9ac;ir8 pgcitor.
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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 7pf8+oy 4dbnev pm4-t ql0+oathe plates of a capacitor. What hb+ 8nfa7qm-o 0l4ev+dopyp4tappens 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 sucj 5xh-3 cj)afjh as paper is placed between the plates of a capacitor holding a fixed charge. What happhjj f3acjx-)5ens 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 becom/b5 6m vb2py im57cdjwes fully charged. The capacitor is then disconnected, and the separation bed67vwymi5 m/jb2p bc5tween 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 cons b*.vu mmmpd65tant charge causes the energy stored in that capacitob5 pdm*.m uvm6r 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 pxq vp-txjf1z6mv r 9:h;9xm5n that caf xpqt6rx 5ph9jv9:vm;z -mx1pacitor 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 point cdz,3 (ogll 0/d;mi jj 7awwx*w+5 cjnA to point B. What is 5 jwjag7on z,jmi;dxcc+/w3*l lw0d(the 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 point A, where the potential esd+ba/fqj 5 :e(zr7m is -50 V, to point B, where the potential is +50 Vma (jzr d:bs5 f+e/eq7, 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,thogs ;7m(mlj2 u s(/h is accelerated through an electric potential difference of 500 V. What is the kinetic energy of th7to2sh/ m(;js hg (mlue 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 electp,p b eou)w(8zric potential difference of 500 V. What is the speed of the proton?,op)ze u pw(8b

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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 throuaohgy 5+*sq;k+ jqbn 3gh a potential difference of 1200 V. Whq+agqn35; j+ osky* bhat speed 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 mov9h:fi i pf-7yhv7j;ks d6gv4king $8.5 \times 10^{18} \; electrons$?

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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 thgl8c/ agma8n85; adg9 -ycmsq rough a potential difference of 500 V. What ca9sq8mn l8g; a-a/ 8dyggc 5mis the velocity of 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. Tc 5*7ppa f h4p/sd;apzycy3 2khe object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the 5s2yc yd 7kp hf3app;/zc*ap4potential 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 potejl-,q3e b3ab flgu-c 4ntial difference between two parallel metal plates separated by 1.0 bb4l-u3q,lecf- gj a3mm. 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,c 1l.)agszp 86 ff pp;tulu98+ntjy5g with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, w9uya)u51 ;sg t6l+8lfzgn p8p .tfcj phat 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 directm(/mjqc8yy7+afd p )ded toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m direct y(8pa/fd 7 d)ycmjmq+ly 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 alon)yox uz)fwvz4 aq;1x ,g the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetiyxf ,v)oq1a)4wx;uzz c 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, separate5s t+ 8oszp-w -pcyfn8;q 8;jpyj wbm)d by 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 distance 1.50 m from the positive plate, what is the potent;mw jy-stwp j8pf q);n8yoz-+cs 8p b5ial 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-Vkg zt* wv9j89 9mceh0w 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 fgce9k hvt8w0zw 9*m 9jrom 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 connected to a yf b 7x7;5cqt* t;lyye12-V battery. An electronf5yxyl7t;c; y t eb*7q 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 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 eap-sn5gj7qd 6.a loj9ywor0x4fd 5s3fst. If the voltage measured relative to ground at a given poin5lgsqjp 3jsxn7ar9 -d06o.o5 dffy4wt 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 toward the east. If r mje2y(ltuo 7+vd :g t8j;*bkthe 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 souj8:7+olkv mgjtu ebtr(* 2y;d th 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 wilnt646cg.ch6 mq06xsy .(pm baijti3l l acquire a kinetic energy (in the absence of frictin6pbq3hjcaml46xmtt06yi 6 .i .s(gc on) 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 dis x+uza)u 1bu:otance 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 thau6w 66s:x(y-o-za v; 9bgk ccmx4cxae ends of a meter stick. Find the electrical potential for the center of the metemu b(9aa-xzwx 6sccc:gxv4ya o ; k-66r 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 (3.0 m, 0). m.2d+ gypfb u7 If the potential is taken to be zero at infinity, what is the electric potenb2y+ .fd7pm ugtial 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). If the p6x afsqkq,d 6 h9-v2yeotential is taken to be zero atq6xfky 2sqh-dv9, e6a 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-nnmm i flliw:t40n(*s0C charge is at (3.0 m, 0). If the potential4flsiw(m00t i nlm:*n is taken to be zero 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 are placed at the corner0eu7t8ct 5dk cs of a rectangle of sides a and b. What is t5tt7eccuk8 0dhe 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 +4 (.hj 2:pt *+oclsind78ax4 yjp+fbf:y hsud).0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges ofpsa+jyfdoi(7. +:lxys h:8)d*24h tfbncpu j +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 +2w2poj 5c7w6hw e, 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 :dv 1sxupq 85xof 2.0 mC, at the corners of an equilateral triangle of side 2.:5dpuqx 1vs8 x0 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 pllb+z1ae9dtf 2 c+vz* fates of a 2.0-mF capacitor when it is charged to 10+*tc1+vfadl 9 bz2fze 0 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 capacitz efwe6x x.1d:vt s7t0or 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, t9v u u auadi9mx6()9ypl+w5s and the plates are separated by 0.050 mm. If the capacitl9dt x9) 9a6sp u5aywv(+iumuance 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 hasa.3+a.dx m8. vvpo q5vn(zmmh5jaak8 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 separatiyc 26fxo omr 9d/j9;mbon of 5.0 cm. If the potential difference between9jmr yo/od;fxm 2cb 96 the plates is 2000 V, with the 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 1i.ifm0dsr + y* s9q:yj00-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, .s isjdyqf+ y0im:*r9which 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 plajy d f)nv-d7h7* qm,htced on a 15 mF capacitor. How much energy is stored in the capacid)7j fvnhytmq -h*,7d tor?

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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 o6o(ci : (w9a5mjf eugmF capacitor. What is the energy stored in the capacito9(ie5wofa cjm o( g:6ur?

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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 it is connng f1d-xnac4 ,9-fwv iected to a 12.0-V battery. How much work was d9n-g1acf nwd ivf ,x-4one 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 thah ft 4f61vb.p-hck1vot 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 conpp hp ra 0hfsx/*-, b2q6kc,eqsists 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 p*iub-drx 7 hk,lates 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 o6yuh*htms 1c ohs7e j) po355gf 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 c ;e0 sg6:,mhai *jp4hnflv w4tonstructed 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 cm04 y t-snwm g:f))piponstructed 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 connect 5muex a-kq)4cnn fnonfl 8:7*ed to a 50-V battery and becomes fully charged. The battery is removed and amo8f5qnx:4cf )ne - 7knnua* l 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 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-bwvp m 6en3h82V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. I h2vm8b 6pe3nwf 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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