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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 v6nydh-1ys e it8nusapx ( k);2ector?

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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 isle) km9ayo ;/53r jmm5emch0 a 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 objects are 5emjti( uai3. insulated from their surroundings. Object A has a net charge of excess electrons. Object B is groundi.( jt amui5e3ed. 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 electricqv t 499aplcss6**bp k 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 electric( gehn)q2b,z e 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 spher umf. iz)kh27f2unlwe6,vv( y e. 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 c) i1b,st/mv uv by a 500 V potential difference. If the potential difference is changed/s1 cuiv) tm,b 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 re;-s 9ro5 vp3g 3wozjreferred 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 equipotential survogcmvw kgo /l0j /f2+ tp-:h:fackgt/ o:0/vwg:v-f+lcm phj2o 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 m;oif q83 h:hsmust 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 on t;o4b aufc n6h*e/ t. dnxshx4/-gsgl2 he electron as a result of moving through a pgehf n;al2 /.x/d4b4 sht-xs*g nco6uotential 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 iss(*w ,c+).khpcfh rtt 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 corresponds tjzu/4fvz1 :1m yb xg5mzef+ 5ho

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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 is2i ltem)rio.* 100 V. What is the absolute potential 4.0 m away from the stom2)l.i*eri ame 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 a*qm kir4w uc,-t a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potentiq*m, uik rcw4-al 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 zj6eqt bii1 ksr./+ 5lat the exact center of a square is 3.0 V when a charge of +Q ii. jlbizes5t+ 1r/k6 qs located at 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 center of d n0;ezl;( 8zrj fhfac1 s2m9va 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 centefh8 ; nr(a;jz9cd zl1e 0sv2fmr 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 twk-o:hl.ygbv.-. hph 0v (cyvq o 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 voltq ryablf6. ks+n5v t.b6 o54be5m6mj b 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 cap86bdt t) d:ctxacitors are identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larg :8dtc6)db txter 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 hv2dx h*,.ukf was a capacitance of C. If the area of the plates is doubled and the distance between the plates i, uhkxdw*.fv 2s 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 then is rem9uto wlc* 3antp4f-1 poved. 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 the plates as thc 1*u9 w 4pp-3lfanottey 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 io09nch wz c8d:s weakened, the capacitance ofc0d c8 oh9nz:w 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-platly pu0;0x*n iqe capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of cpilx n ;uyq00*harge 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 maintat2390rjs mwfx ined with constant voltage by a battery as they are pulled apart.2sw 0 frtjmx93 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 adding a dielectric ma9w 5+sb2utm eqterial between the plates of a capaci 5+q9ewbus2tm tor.
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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 of0yf +a hj2p)nc a capacitor. What0p+f2jy)a nc h 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 paper is placed between the p-y7r,)wxoe.ai74mgpeg ;- j mky xq6blates of a capacitor holding a fixed charge.x o4;mkeji)g qm 77ex,-gyy .b-aw6rp What 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 battery andz0xcm67 ;pacf4(qqwiokk64 ( hyu z* c becomes fully charged. The capacitor is then disconnq 70(qu 64k(zcwzam*pox k;6hf4cy ciected, 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 constantep q /rz pz/rca-w*2*t charge causes the energy storedrq*ctz/2pe az-/ rp *w 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 capacitor causes the energy stored in tha4ke a*ozgs98xkju,3 mt capacitor8m jazeg934 skoxu,*k 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 A to po /wiy.9jw;f6sme-gz ug yq y);int B. What is the /fywu-;.6 )wqysiymjez g9g;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 mcx ni 1 8,2+ooo 49zwqsjj. cgyh3at:amh0)ke oving an electron from point A, where the potential is -50 V, to point B, where the potential is +50 V,my h .oo1 sx3c+i9jzg0h2qt e4no:,8 aajwc) k 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 angm x0. (vr.dmsxc9at+ electric potential difference of 500 V. What is the kinetic energy0 m (d9xv.axrtg.scm+ 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 through an electric potential diffexo)cvkz oxb/gy63r0 3 rence of 5 /okxx6b cg3ov)3rzy0 00 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 a potential d(3fcend (:v0wfwqgs8 ifference of 1200 V. What speed does it acquire?w3sf e0c(gdn wvq(: f8

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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 mov45mo. drs lx jn*zk(u*ing $8.5 \times 10^{18} \; electrons$?

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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 accelerlxgy7x2tncg:)8 sqp;uk yb ,9ated through a potential difference of 500 V. What is the velocity of the ele7x xy:82)gcpl ngusq,;k9bytctron 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. Tef24m vi 53sfy krx8zs z03o*lr +m.c4 cv7wfdhe object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s.r30c4lvskomx w f2crve*z75 m 3.d4y8 f+zsfi 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 2 cjhf hbf;9u,lpzk;cfa/. s:difference between two parallel metal plates separated by 1.0 mm. What is the elec: cs,f b;z9lukcff.h 2jh a;p/tric 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 dirugdm;bk22gxtf.5 a6 i ected parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is thex.kg5bdatf; u2 2m6g i 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 di* c 4t+)q-ly-cd+7o2trpqv m:jbea oprected toward the east. If the voltage measured relative to ground at a given point is 80 V, what is:cb alqco4) otq+ 2pd+ -re y7jmp*t-v 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 2w7luf v( +omralong the direction of an electric field of magnitude 3.0 V/m. What is the change (2ofm wl+vr7u 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 12-V battery. Ab2bfv f snkf06cx*:b 1n e6bfsknf*xb0 1bfc 2 :vlectron 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, separxa052s q9ws4d93ud hmw x gta.ated 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 platew s4a3 hq2d daxg0tw.mx99s5u , 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 .iiq nfjo3jq;pv4, 1rto 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 spv;iqfrp.i1q34 o jj,need 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 6f+kh8 0sg/( v1j s 6dloaabmiN/C directed toward the east. If the voltage measured relative to ground at asfvg 8il dsmk/ 6b0aa+ ho1j(6 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 toward t1puc ;htsew9 5he 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 directly souteu; h5psc9w1th 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 differencseeh5tn,o-bj9:au c (e of 12 V, it will acquire a kinetic energy (i9 bs5c(u enthoaej- :,n 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 dis8i ,e44fab utqtance 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. Fini6d-crg 0 s- -,qyfm:q nz8mrad the electrical potential for the center of the cmsf:i 08m-ayq,d r q--zr n6gmeter 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 u1zexdgmx c c/ +16/cf)z- ;h gcsxf)ycharge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric poten mdg/1x )/e+u6)chzc-;x xcyg 1zfcs ftial 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, nv(iynt tv t(*h*6p3qrfe1 o) bd37ae0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4.0 m)hof aev rqdyt71)(b**3 n6ept(i n3tv?

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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, 0dwsm.umr x6 s0j8c pig.2n8p:) and a -2.0-nC 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 from infinity to point (0, .0:dxjgcimm.npup s6 8 s2r8w4.0 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 rectangle o/-,d.r2e nkf g+n1xaaaapi6yf sides a and b. .nd/ay-i+nr2a a6k,fg 1pxe a 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 +4.0 mC arjko /fsv+r:x2 e placed in two diagonally opposite corners. ksfo:x/j2 v+rIn 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 (char zj0 v/r pwlxjb(g(y(5ge +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 necessary to place three chargess4pd s*dhv8-jxdq+9d , each of 2.0 mC, at the corners of an equilateral triangle of side 2.0dq+4xvdsj9-dd8 s*h p 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 plau5x g;r (ukbmxx5+tn2tes of a 2.0-mF capacitor when it is charged to 100 V?2ktr(m5 n; xub+gxux5

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate cap/ygfyr9e tmx epck/k)1iv+;)acitor 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 capaciatay4k hn 3 jfo j8laofe0x90n1s82) rtor is filled with air, and the plates are separated by 0.050 mm. If the capacitny80a3xfk1j ar)nahfto8o e0j 42 ls9ance 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 has pl fd)(n:okn:vho-tnr , jc28 fuates 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 5.0 cm. If the po6es.;rpkzel h :z ,,xqtential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field be,.;sqzx erp6,kz :lhetween 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 ths7me*fhua 04 pe battery fully charges the capacitor, the capacitor is im4p7es0ahu * fmmersed 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. How much energy .pw2- e0btymmb2sl0zdb/o;p is stored in the capac t mdp00wbblop2b-ymz2 /e.s;itor?

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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 s(npq.d90ww *cfzm 4 dsff,m:*ins ph-tored in the capacithfw np :csszq mf*id*f-dn p4.90(m, wor?

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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 ca (njjw r2 isz3+ fg:vynd+h3j9pacitor when it is connected to a 12.0-V battery. How mg+3+hjj: ny 39fjrsvi2 ndwz(uch 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 capacitork(od0vr (xg6g 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 plates of ai6p)t(tfs a u)rea $1.5 \times 10^{-4} \; m^{2}$ 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 nakw1;m: pq)3zp. lz wwy;pz6m 2 oy1oconsists 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 consists)7/;v:r bx 4cdu lrnus 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 cap-eujy otwj p(s/(ub 7/acitor 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 capacito wsp:g)9jsur8r is constructed 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-V battery and becoml 890, bb24wryujdhcves 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 capacitor after the slab 4byh v8u9, b2dwrjc0l 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 ba7nx..:c qj aiecomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If tq:ax jnci.7 .ahe 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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