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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 j3oa qtqpw(9mk0t 2obf:o a42is 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 a *92 .417lst3acrzv2 qij ehzi-k4vqlz;py ki

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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 ar vo4x9zr,ex 5qhh u0v4e insulated from their surroundings. Object A has a net charge of excess electrons.uh4e4v , x5o9zqx0v hr 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 elc-spvz3o5q+z r lr:0i ectric 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 movingpco3im 40)+5ltc vvssm2(w (r1zsch e 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 placed on a hollow conducq u-:9qfkyyi7ting 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 i1i2b305 4vnf; pihioy r0d u v/lfx-urest to a speed v by a 500 V potential differency rd4ui pui/i x;0vv2i50 hofnbfl-31e. If the potential 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 all poin97rnc.36our iijv mq5ts 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 alon7. f x j/s2hdedllh,0ftj1p1nq y,e4e g an equipotential surfaceej 2.hxs0 e1,dl7ydfqnjf,41 l eth/ p.

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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 bexcgg 9wqf2f(/

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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 particl6csx d/kmvq4d-*j a5de carrying a charge equal to that on the electron as a result of moving through a potential difference of one volksjx6v 5cmd- 4dqda*/t 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 ulw p0ph95t8hm nit 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 corresponqw2lue-tz 6s6w) yihh q e+x81mkd, 5eds 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 7p3)ffk3mng i is 100 V. What 3m3f)knp7 fgiis the absolute 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 chr eqk16yh /2 gl+-le04-a sjdovj8hxn arge is -100 V. What is the absolute potenehxoh -s6nq 84el/k0j-jyval+ rg1d2tial 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 3.0 V when a gd dnl:8ydptkg a 8f18o6k 50pcharge of +Q is located at one of the square's corners. What is the absolute potential at the square's center wy8n 6a0d gkd88p kgftl1d5:pohen 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 square is 3.0 V when a c5smj5b 0rd8odharge of +Q is located at one of the square's corners. Whatd5roj5 80m bsd 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 two b7l7n3x glia0mf-fb8 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 fi.i 4mel23 scv ,5eqiis 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 on mz 4m6ca+8hmre has twm ammh +6c84rzice the 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 hasdfz1019aw *pxopz tx+dzp i-* a capacitance of C. If the area of the plates is doubled and the distance between the plates is hzw zxpda d1ifo*90z-p1x +*p talved, 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 a,m5nf:pt5jhr mto4kf. ) aa +und 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 potent)m5a. pk4u5 fr:hotaj+nf, mtial 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 plag4q ;h.k4 cnzstes of a given capacitor is weakened, the cap;h 44 qsnk.gczacitance 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 parallel-plate capacitor are maintail9/u onl/ ig4u4k+;) o1areb tl7zjpuned with constant voltage by a batterylzpe4a7luujg4in/) o+/9;luokr 1t b 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-plate capacitor are maintained with constant voltage t s(gie1f h*;2pauw:w by a battery as they are pulled apart. What happens to the strength of the electric field during this process 2ew( u*:tgw1h;fais p?

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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 9xwipt/gc8 ot67 noy 0nyh/2va dielectric material between the plates of a cap h x yn0t2t o9p8g/cvi/wyon67acitor.
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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 the plates of a 3ma,oq5o :6vfp1zxt nhh,6crcapacitor. What happencopq5:rz moh ,x,1 6af6nh3v ts 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 between the plates of ap3q/ oh iu(u y in)z,b*dj6kl)sz9m+d capacitor holding a fixed charge. Wu *idky)u jz)npmz qbh9+ os,i (3dl/6hat 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 batte j,7/l- 9ym qvttxlh:xuhy4mk8v(u5h ry and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in su ul9vh(7xl ym-4k:x8utth 5j,qmh vy/ch 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 capaeq;2 vgl96k; hp 5teapcitor holding a constant charge causes the energy stored in that capacih;gt qlpk2a6ev95 p;e tor 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 bq;sx8i4v 0no)* iabdin that cap)sbxvq d8ib n*oa; 0i4acitor 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 chao2ka4* l9j fg0sna a3 ng0n*tzrge from point A to point B. What is the potential dift* j s0al3aga fno k*z29gn40nference 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 poi.zr xevjs. fx7leup*z15m;-p nt A, where the potential is -50 V, to point B, where the potential is +50 *re- 1zevu.7xzlfm5 .xpj;spV, 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 accjqg 03q2p hwc)elerated through an electric potential difference of 500 V. What is the kinetic energy of the protoqpj )q30hwg2c n?

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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 a,nwl)nn1 fu7(dy 9k)l6vzug3gll 8 k qccelerated through an electric potential difference of 500 V. 7lg)l 3wn ,z(1 uuygn8vdllk)6kq9 fnWhat is 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 differencx6s5(ck+(ifujsem8z wj9.h 7nuq ,s ke of 1200 V. What speed does it acqw+xcujkis5zs9m(u7k( 6eq8hs. n j,fuire?

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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 zeh/d1 pl *h 212m+i5cni jbcrdo 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 accelerated through a potential d3c0xw kyt86l 8 b5uuetifference of 500 V. What is x60e5t 3u88ckby ultwthe 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. The object is a3-20juowic+ft o w qe8ccelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potj8f3 u+o t ewqw0ic-2oential 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 diffed.easom (5m6i0g cu*z rence between two parallel metal plates separated by 1.0 mm. Whm6z5(g*do. au0 cismeat 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 magfa/jt vd)i9f(/e w8fisr0+j znitude of 500 V/m, is directed parallel to the +x axis. If thvfti/i 90)+zejd /(js ffwr8 ae 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 directedj1i j ,pedz+0m mk4jt/h8gb8k 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 direcb d+gtkh,i0 /m4jj8 8zjekp 1mtly 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 o khepk83) /m 8b*onwrvf magnitude 3.0 V/m. What is the change in kinetic energy of the protopwm) k3 8vk n8/bh*roen?

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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 battery. A.f:op;2mq ioad p;t6fn 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 p6odmt;q;of :piaf2 . 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, 5dxxf-nz(heb1c e( 2p separated 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 0.050 m from the positive plate, how much kinetic energy does the electron ga2 hdb15 epx( zf-n(cexin?

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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 1fr(xyd*l ,x-l 2-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance-xll* (r fydx, 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 m 3s+umohflqjc9w b 7opm4 ac51t17m+toward 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 direct1j qcmu4 1co+3+7ah5 pmf9m so7mbltwly 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 the vj v qsje. ++9,zkdm5hkoltage 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 soutkz ,.+kjqjdm ev9s 5h+h 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 diff.mv *5nd5juwj *s-ojj;v:x pdxd/ 9bblc1*ji erence of 12 V, it will acquire a kinetic edmb*5oub*vnj-vx d i l5wdx1 9jj:;/*.jjps cnergy (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 at a distance oo9 azkv1 krn)e7ov82 gf $5.0 \times 10^{-10} \; m$ 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 slo8u-.;d c( u; tdovl11hzrpjtick. Find the electrical potential l. d1rdvu-;zt (8j ;olc ouhp1for the 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 chargel-ghjnd/u jl77g5(jq k*c1oc is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric /- cl17jg o5 n7cljh*gq(kdu jpotential 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 *r*o5dx2)os/q dhrt his at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy ofod * dr)x*2sro5hht/ q 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-nac5.hp * jv w9v( p8szsy1;bovC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge fro hzb859o* cypjav s ;(wvpv.1sm 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 plach-ub lxe;(cqg7,bn6y ed at the corners of a rectangle of sides a and b. What is the potential at the center of the gh ueb(lq xy-c6b,n; 7rectangle 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 t+ezu.zi74y. uau; r gwwo diagonally opposite corners. In the other two corners are placed charges of +3.0 .r +z wig4ueyu7z;.a umC 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 +2e, mas+( e4cb mousu3s $6.64 \times 10^{-27} \; kg$) 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 nece)t/tjuqdx8 pi(lf 3 r,ssary to place three charges, each of 2.0 mC, at the corners t lp/,fdtj )riq8 x3(uof an 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 charged to 101i wz; yvbm,qb-k+5a:(nq srr01:iqbzw sk+5qa-y,r (vr;mnb 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 capacitor 9 ypmf60g c+4z-; oyt3ciuzyc 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 fv (ckq;hf*s;dw+ku5 filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what ( +s;kd5ufqcw;fhk*v 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 plates of , qxoj9x(1p nsdy1+i carea $0.20 \; m^{2}$ 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: jn lt4irgaz8-n6 ; ar )z4x(jz(dcji 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 betwein) ziz8a jzjnr -(a;c4j4 (l :trdxg6en 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-V battery. After the battery e*y*c (ivf:59k , tk;v rqoxjbi)3qgxfully charges ,k(qi*f :c9kovb 5 ry)tqev; xg3jx *ithe capacitor, the capacitor 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 placed on a 15 mF capacitor. y09jo2 s: c-o-robrs1wpm2 nr How much energy is stored in the cn9 2s1yc --r r jwb0op:om2osrapacitor?

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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 enerdo4who1h+l g; gy stored in the capacit 1 o4;hohdlwg+or?

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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 ;l4b. 0dig4 lqdpvxu4capacitor when it is connected to a 12.0-V battery. x4 0lbugil 4pv;qd4.d 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 +vh9vgvxjj0./6amod is charged so 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 of platrf hb9g2o (jf0es 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 consistsb s7jf ;lq8as) 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 consiswx tv* *hpxnc1 em:o56ts 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 capacit. wwc+so( -vfoor 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 is constructed with plate area of7n *9 utsxwmu)4p -rzb $0.40 \; m^{2}$ 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 /w +ywexoxy013rio)e *3ashxbattery and becomes fully charged. The battery is removed and a slab of dielectric that compe e* 3ryhwx13aoxys0)ixw+/o letely 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-V battery and becomes fully chd,7 rg ;y*nvacarged. The battery is removed and a slab of dielectric that completely fills the space between the plates is r gd v,c;y7a*ninserted. 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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