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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 ve:s b:smja tqmjz9 -m7:ctor?

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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 at7oetj74:tmfa: vmd;a(l7 dx

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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 froml ob +kvfy0(q/e8/ giq their surroundings. Object A has a net b8lg q0v/ feikq /+yo(charge of excess electrons. 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 electr1;;/.axak fgnz 8rnrm ic 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 the ele02zeuj3bto 1o ctric 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 conducting sphenm4xoo 9 ,vns(cad30p re. 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 am9fxx.a +3cn,l h6dcz q )xgz.ccelerated from rest to a speed v by a 500 V potential difference. If the potenthdflzx6ma)q3n , . 9zx g.cxc+ial 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 points are at the same potential is 9a5xzcal.2qtd m 6+ylreferred 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 asmf*g. +j ajp ,+ixuh*h(o1telong an equipotential surfacipgme tjsj+, *u fa*ho+.h1x (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 mus9w wl69( gomk zso4bel-yk+y(t 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 carrying a charge equal to that-aost+b u1dh0 on the electron as a result of moving through a potential differencsb 0+u- hot1dae 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 unerm8p8pc6y3+vh g1wvr s o 6n)it 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 correspo3*g8 pl .ooay l4sgq/gnds 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 buj -rfhxsu2 6d5.ubfn v9+8hfrom a positive point charge is 100 V. What is the absolute potential 4.0 m away from the sam -x+6dubu .n8hrb vh sfu2fj59e 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.,qjasrx2 , bec(e-v-m 0 m from a negative point charge is -100 V. What is the absolute parsq(jxe , -cmvb2-,eotential 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 ;yz l3(w:uv dcis 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potentialyl:cu ( ;wzdv3 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 a square is 3.0 V when a charge of +Q isszvx(,1m-rgr/ vm8 wve :te ,j located at one of the square's corners. What is the absol, m( 1zje v /v-sg8met:vw,rxrute 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 tw6rc*xh e+,vy ( zs5szyo 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 is asw8z/ * i84ua 2brkv7)kvhjbx

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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 identi9 1vntbvj j vt6x;8hq3+rdlh3 cal in every respect except that one has twice the plate area of the other. If the smaller capa lx33v d+jtt;68vhvjhbn 9 q1rcitor 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 er.4 bed7ygke3w7t6y is doubled aged63bw 7eyyrek 7 4t.nd the distance between 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-plate capacitor fully and s*;qq6h,c8f2hmeq 2 kago 2tj then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount os;qf mk8qjch2htq e2a62* , ogf charge on the plates 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 co lg 0rds .vlz2hh,eovy o)5u)/8j*edapacitor is weakened, the capacitanc,od /vdlr j8o) guehe2.ov 0)syl*5hz e 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 maintained witz/yr +-b4gxqxs-: 3+us cgdlsh constant voltage by a battery as they are pulled apart. Durinu/+gxxs: -q+srd3y 4c l-sgzbg 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 parall3 )e 00alde1 dbr3t4+b i;m x:dtxmuzdel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happ3 r; dxauxbz4eebidt:tl)dm 00 m1d+3 ens 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 adding a dielectric material between the plates of .ei4jvd35xj )4qth zo a capacitoroj4v)jez h qd t.5xi34.
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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 ,j+l cf,rb6zxx5q/ y othe plates of a capacitor. What happensl5,qybjc 6z frx/ xo+, 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;v;v yu8nt:qi3 oz*2n,d1bbd 9 vq9c oqhhj t) such as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between the9doon) zbb8:v,dv2q v;hi tc3qt u y9qn h;*1j 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 connected2h;hb 5*ht-u0w 4gk xhxa6 fkt to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is x4;h xah5-tg0*k f k62thuwbh 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 conlxmuckg4 q j51bsb6jrabs3 p 4,v:6ui3(vuk0 stant charge causes the eneribv3sk uqxg vrs:4ujb(65 bpj4l,0u cam136 kgy 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 given capacitor8pb7 s8u.;hauf2 r4f2 u2 fadcz0ccknca : 0cu causes the energy stored in that capacitor tozn d4b0c2uf sc0f.2cuha8a28 ;ur: a cck7upf

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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 A to poina(0.xeebg1g t ,zui 0lt B. What is the potential digut0 1e.x(lb, ag0ziefference 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 movinhj bm,qqi*,t(mf8g 4 bg an electron from point A, where the potential is -50 V, to point B, where t ,ijg*bq bmq4h,(fmt 8he 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 accelerated through an electjczs8iz) p284r(rws mric potential difference of 500 V. jr(8i 4zpsrz8 wm) 2scWhat is 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 uv ydb1nb(; sikydz3c7kps; zb5/8- athrough an electric potential differenya p/z 17bu-;y5ibs3n k 8vz;(dcdkbsce of 500 V. What 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 3i /*y: lzqaksx65bxgv/qs8u a potential difference of 1200 V. What speex*s ulqv6asb : xk y5ig/z3q8/d 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 dkki- v2 txy qohiwiq:er,8a/s;4,1jn o 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 throujz( k7 zw2xe1xgh a potential difference of 500 V. What is the velocity of the ele7w1xej2x zz(k ctron 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 accelerated from rest th4 l;iw;kfe:(udxg +dg wy4qi (rough a potential difference, and afw4+ ;w :kqild 4ug(dgye ;(fxiterward the 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 betw* l n4/jw y6dcf8h2kyoeen two parallel metal plates separated by 1.0 mm. Whaf8dw/k yh jlno*4 c2y6t 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 magnitude of 500 V/m, is directed parallel rhz7ek8dhjew 4 8+/u j- ll.6v*kkyq rto the +x axis. If the potential at x = 5.0 m is 2500r7ljh86k8hzj y +dkeeq.w/k* - vlur4 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 eled l2ispa9:.l kctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is tls.d2i p9a :klhe 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 q)csi**(*+gnlpv eig) fhcl+y +djw0an electric field of magnitude 3.0 V/m. What is the cha)pv y+ ) fc*qc+*ihl+ gjlgw n(e0isd*nge 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 z e7rjaq2t)zw* .f- rk12-V battery. An electron released from rest at a location 0.10 m from th)f 7-azqk2ez. wrrtj *e 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, separateteg f*zqpdh5w kg( 6 /bh//s(bd 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 elebpwgs/ zdqf(g(/5hk 6b/ * thectron 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 2u0p,- 5con gu ;3jip+tjxtzq 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 positi5 3j+zxu go-p;p t0 tun,qj2cive 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 electrg2j 2jo7-.r l*qvl lrzic field 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 point 1.0 m lg*qr 2l l j7jorvz2.-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 the vo+* bdshi 1zr/tm r q7duxy2iqm+9(f k7ltage meai7 *ks9drm7t+mzrq 1fy+2xh dbu/(qisured relative to ground at a given point 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 tfo*tz. 2nymqqxn070qhrough a potential difference of 12 V, it will acquire a kinetic energy (z0o n7nx0qqq .y 2mtf*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 distanc+ 8xc;)bw0d etir.yo ue 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 pot oaa rg5e8+jff:1s6 wgential for gfj a68w5:ofe1r+sg athe 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.w(izno2-j* s t0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is thts-2 w*ion (zje electric 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 charge is at (3.0 m, 0). If the n8 f k-x;5xidmmqusfu)t 6:;d 1 ec:gipotential is taken to be zero at c nfeusdmiu;kx:g 5:);81xmtq -6difinfinity, 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 is at (3.0 m, 0). (pls*1i+w8k mrj x+d0jphz: nIf the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to pjj 8+rd1k0pm *xs+p li:n wh(zoint (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 cornei)lrmwhd;2 n l/x;5 surs of a rectangle of sides a and b. What is the potential at d; lwu/i 2)lxhm;5nrs 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 are plati g9b7lpim- 4f-bap2 ced 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 9mp4a pg-b- 72tfbli icenter?

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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 +2a w,4fc jqkjru7((r w0e, 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 the j)iiutdl) h85 corners of an equilateral triangle of side 2.0 cl dhij8 5)it)um?

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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 2.63ditoyx* )h u0-mF capacitor when it is charged to 100 V?3)*dx iyt 6huo

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capaobs n 0l)31 uia o:ad5sacq2n(citor 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 capacv3c9kmitb,f ub+ *l3titor is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate c 39mb tibkfl +u,tv*3area?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capac e-hc6pd+f tap+cvi;(itor 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 capaam9 + tt7 dtywyi2b:h)citor has 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 fii+)bwh :yt2my 9tdt7 aeld 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 connecy)ub 3 xo*v7oated across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). H3b o)a7*xuovyow 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 place 5(1vr 7w0feaigza7 ixhkfu(( o 2b8uqd on a 15 mF capacitor. How much energy is stored in the capacitohe( i(w2a7 8f av1k0 7u(qfor5xigzubr?

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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 capaciy- si sdl*er.4tor. What is the energy stored in the capaci*er.sids 4 -lytor?

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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 wheo, qe7(:pih5;xr hb3: dzmyhe n it is connected to e(;hheyz3 ,hdxb mor:7: pi q5a 12.0-V 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 charged so that it 4a:g dz/(okuu8j dlu(gay* 2igt0a:tstores $2.0 \times 10^{-3} \; J$ 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 inodg7e 71 a+yconsists 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 plates ofczkvj(nk y u191yq74b 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 conw ml6:/o wp4ftsists 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 ajm q4aletr 5)ltp 8.1f:dtu)z rea 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 pps2eqzc , dn( t((m-eslate 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 battery and becomes fully charged. Th f)ap 4 ic0hn44sxt*j9 :vupicd;ezx 9e battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectr* ;atjecix4x9)dvp zn0p:cs ufh494i ic 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 fuiezgly5v1k. 9 lly charged. The battery is removed and a slab of dielectric ti5.lvk9 gy1ezhat 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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