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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 followingd1tvq1v )kt9-ap hy- h is 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 aykx b2 vq/bq5)+ 7awgg

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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 4pkcnz(ayi ,* ,9zds9,idx v einsulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object isvcns9y ik, i4xz 9dadz,(*,pe 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 electric fielpcw,i 5iqa5 dh yfww3:kn/.j.d

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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 the electric rn,l2 fy) dv1sfield

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons are pli kd6( uiwl..jjlto/o,q*g -laced 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 speed xbrz (;n eo:8ge v+ trqa*ab;+1(c yotv by a 500 V potential diffezr1x8(r:+o*n vceb(eg t; ;qato+yb arence. 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 po .j -kkzpcicb4lx,y(v .7r5so ints 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 friu: .va iqa/k2om point A to point B along an equipotential surfac/2v :a .iaukiqe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfo1mu j0 :yii)o9 fw:tj)ty5gn ace must 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 particle carryinggh5c-a6 coi7-k yya)ws7 ,oqf a charge equal to that on the electron as a result of moving through a pote sgy f)o,a6kwyoqh7cci5-7-a ntial 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 m jjay(b rg:+ah94 a+sunit 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 correspo eq4rqxu(qnjs8f98r8myu k 47 nds 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 posfa(bs -)hyr, mitive point charge is 100 V. smb-y )frah,( What is 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 ajtp ungw ;p* qp5fg+4:t a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same poufqnp4gp+;:wp 5 gjt* int charge?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential9 pam/ry*q;k j mw)4yl at the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. Whr* 9al)qpwyj k;my/ m4at 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 kgygwjz:fzr(,,h8:3tx06,fx fu mxq a square is 3.0 V when a charge of +Q is located at one of the square's corners. Whatg:k fq:j3x 68zftrx,muy,,g z(0hfxw 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 charges that ar((h+0 *v(r,dcisw epmmd,xl te

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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 iux :ja* 9gm-iis 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 reu:;amf kh,ue 1spect except that one has twice the plate area of the other. If the smaller capacim1 uh;uka:e, ftor 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. If the area of the plates isd/*x kubc9:whge (/aj doubled and the distance between the plates is halved, wke//h( j:xg b d*wua9chat 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 thenfqetxcu, 5jh+- a,l:y ,fr)bm is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plac ,f)+l,f 5h-au:tr e,jbxqmytes 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 given capacitor is weakened xoo.a,ebxz2*d(ryx 1+b2r rt, the capacitance of that capacxd 1x*r+( .b,ox 2rzt2beyrao itor

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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 qcd+ resf8 -1wef(jl *capacitor are maintained with constant voltage by a battery as they are pulled apart. Durin+ e-8j1r edfflq*c(swg 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 n-r w0u. 5dv zpn4p(hcby a battery as they arp uz. p(hdnwrc45- 0nve 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 addinyl+b*z8xdaf t3os04n npw.c +g a dielectric material between the plates of a capacic8+f*p an 3 y w+otzlxs4db.0ntor.
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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 6iqskp-h1)eh3 rp+ ra placed between the plates of a capacitor. What happens to the r) -6rs1p iqkphe+h3a 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 a rto uypx5 ;*v(capacitor holding a fixed charge. Wx( o;tvp* y5urhat 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 batgwmhl-)pmrrpevc1 e- 2h1)- htery and becomes fully charged. The capacitor is then di)v 12 eghhp)h 1e-pm-mwrcrl-sconnected, and the separation 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 constant chryy vaji+ sc7 e-o.)0carge causes the energy stored in tha a-.ryei7 sj) 0ccv+oyt 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 mv)hg hbi68:tcapacitor causes the energy stored in that capacitor : mti 68bvghh)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 id 5h7; qrcpper:w((ifrom point A to point B. What is the potential difference between ;wp(e h(rrd :iqc7pi 5points 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 inz/*) /l2jumuy7yn yry o)l yo, moving an electron from point A, where the potential is -50ryyjyu lnoo)7,l y/ym* u/z)2 V, to point B, where the potential is +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 ass5chmr(5961 gua6ght5z pgaccelerated through an electric potential difference of 500 V. What is the kinetic energy of t usg(rhc g6t ga65p5m1z 9as5hhe 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 e6 jr h rta2ti3zc cwod:;1s7-plectric potential difference of 500 V. What is the speed of the pt; o-w 6j7aztcc1 irr 2dsh3p:roton?

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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 di *wkg 0vlwn5:afference of 1200 V. Whal5kn*0g :wwavt 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 994 kedhedzbyq79:xdg5 8 o6o1s ctu7s.0 V 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 electron is accelerated through a potential diffe7z-3un3hc;rw w*( j ssbrt)oo5 h.tz lrence of 500 V. What is the velocity o h* ht(zwrlt-rcw3o;s 5 ) bs7ujoz.n3f 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 irdnea.ux o8;i2acto:au6:.. The 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 potential differenctc6e 8n:iur:x;. dau ooai2 .ae?

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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 two parall8h( kvkkv+u vbqz( t*n 4rc*i-el metal plates separated by 1.0 mm. What is the h*8qnv4zrku ivt(v( *c- + kbkelectric 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 mf9)plof pkb8lb x adyc--/m3- pg :;iV/m, is directed parallel to the +x axis. If mc--pyf: -po83 bmlxi pb f)gda;9lk/the 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 q t1x yoo-2)r*/*hrkkpaa c41hhmx)mthe east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a poikt /pxho)q-*h mr 1c2 aayork)*mh4x1nt 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 elece b*n /itsuf/xa8:l,*qv: nddtric field of magnitude 3.0 V/m. What is the change in kinetic energy of the ptlxad:*di8n*//,b vsfq: une roton?

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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.)vg (7sh8k* b yjk w*v0nfxbr7 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 posbf yh* k0)7v7jnv r8s(xbkwg*itive 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 connecte5,* (*civdiz/mby85) enpsy 3pkhd zpd to a 12-V battery. An electron released from rest at a location 0.10 m from the negative p*cbvzpkmh * p 8 (,e/3dyiyzs5i5)dnplate. 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 connected to a wzewp, kdtl,37/ 4py6j/ ewfs 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 frwzsdy,3kejf/ 6 4/wpe,t lp7 wom 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 1b8o twya vq0-dkk1i ( i):mvefield of 50 N/C directed 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 v e:(aki8om0 id- qvw1 bkty1)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 fie,p ijiiy5d )ff,z)w70x c+oould of 50 N/C directed toward the east. If the voltage measured relative to ground at a given poi5),x u)iz+o7,fpi ocj wfdyi0nt in the 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 will acquire by ric3z ua 3b:lbws9e9z1d3/ a kinetic energy (in the absence of friction) ofdz ubw /:33br39ea1 ic 9zbysl

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potentialntx+6p gb dxgt- - 9wjoj99 /h,e/vyrb 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 at the ends of a meter stick. Find the electrical *xk ci,7vv8u qpotential for the center of the meter ikqv vxu*7,c8 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) e ogbv5* c h1-+xa +inq:5m+oyw vnu2mand a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric po*e+ boiaxqn+v51m5h +mo-guvy : n2cwtential 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-nCbx:uk o79ka6 8k/cwzo charge is at (3.0 m, 0). If the potential is taken to be zero at infin /987kx z:6wbcauok okity, 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-nC charge isrv5p)ibr0 kwdtri7kd cr o 469f a5d3: at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required twt: kp4rbivodk57r5ri 6f cd0a9dr) 3o 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 equaliy*au(i j ra0k-u8zq3 charge +q are placed at the corners of a rectangle of sides a and b. What is the potential aji*8y -0(z k aq3uiurat 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 +4.0 mC io),:. ft,)d zaucj-mh+puepare placed in two diagonally opposite corners. 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 centeieu. :uppzchm )) d+ojf, -,atr?

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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, maz 3w-x5hib 0eko+z5mxss $6.64 \times 10^{-27} \; kg$) 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,gfyz j5z:ra5 /z;(h 0szg ei0q each of 2.0 mC, at the corners of an equily(/ hrs zag ;fegz0z5i qzj50:ateral 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 .2 5p0dk)zstyep x0ve plates of a 2.0-mF capacitor when it is charged to 100050t.yzp pv )2esxked 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 has plates of areltq jhhs7r --t 4uvqm(2u:cj 6a $0.50 \; m^{2}$ 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 separatmm f+d7lg 5i-ked by 0.050 mm.l i75k+fm-mdg 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 capacitor hawj2.ey lavc*vk h,1 hhttu0 7(s 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 vlf0zu umk/m52 xv84bplate 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 plate l 8m/mu kfuvx025vzb4s?

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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 10 uf5e/:hnhralq4qp*,zwu* ,o 0-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric c,fp w, rq ah*u5*hqe4o/nzu:lonstant = 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 capac( r r5ug;pp y lfk:jycfp9kq)++civ.4itor. How much energy is stored in the)rifj 5;.++kpp9c pky :rlq gycu4vf( 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 capacitor. What is the energy storer2h6qn 6q 3mgad in the capacig26na mqq36 rhtor?

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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 plat.s .7bzmvwygyyy ( a9:es of a capacitor when it is connected to a 12.0- .zwgb.:m7yy(yy a vs9V battery. 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,4p ;cy pox) eubn5;tt 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 capacd nrg (ymwf,-4n .,sa4myu w3sitor 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 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 capack+xsp ih. 6s0lfmj:w* a-u(rw itor 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 capacitorn8sxh uhf1 1j(:y2ypp 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 bg. wd6bi7u4y 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 apv n aa p48:m;sscej4/rea 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 heg2592 ald(atz wnf-8b vea 6and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the ddaef2 hwl28azv ab 6t59-ng (eielectric 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 ys gxnw ycc.k73tg)gj;3*6av 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 voltage across the*cy gwcva6tnxj3.3k7 ); ygsg capacitor's plates after the slab is inserted?

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