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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 no:tso z-e t e)lwe38nw1t 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 coulombwfhuzwhui.n8e 7n +(4 is a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical alumin8 zubpe :lw4*fuqyt2kk +yn8:gcnj;d/r3 nv8 um objects are insulated from their surroundings. Object A has a net charge of excesst: nkyn cfbr 8p*eq+38jw/u:4vnky28 ld;u zg 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 id2uuq0s9mz kq*aiz jubsr d9co:h.a w1q27 86 n the direction of the electric 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 o fp8o(f2g a,8l+vavsd lex;4to 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 conducting sphere. T7zi c m2 x+qzdqj00taknb/1z +hey

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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 from4hx j bx+usqwa3*h a,3 rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what wib,hj3ax4 uw3xsqa +*h ll 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 ajs3w1+zo wv2 morms t /.au9*pt 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 equipote/dw59m:m w ock8pknr4:xo xe 9ntial surface.r/xnp:we5:xo94 k 9 o8dmkcmw

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must86 *+al sgrdmek7n ,ytwn1u x1 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 0ss3 rodv;: t virjm3s55vmv 0charge equal to that on the electron as a result of moving through a potmd3 ts : mv5jv3rv;5 ors0vsi0ential 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 unit j l*5lo- oefuv0hq+6w 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 cor (m:tl8wnqlu7hg8i2 sresponds 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 chardmnfz807szy*77v ftt :fll4 ram0mq3vt- w3tge is 100 V. What is the absolute potential 4.0 m away from the same point chargem7y3a 8f*7wqlztft7r4l 0t-v3v tm0 :nfdzs m?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential a6 b8w l6i(aywgt a distance of 2.0 m from a negative point charge is -100 V. What is the absolute 6wib6lay 8( gwpotential 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 a4h xon: 6qh8bz 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 nhz6 qxb:oh84center 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 6ucxf d5wr8d- V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's cent65-fdxw d8c urer 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 od zi+hn12s 1l0dh2ls jf 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 bj vvd hm 907bfrd(w:ftd;s/5ve0 ba2is 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 capacitorsibwrsz 6)2bk q,2t;o bdc3xc8 are identical in every respect except that one has twice the plate area of the other. Ifz ),s3 btk;ri6c22 bdw c8obxq 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 has a capacitance ezir;s7rh h9 *of C. If the area of the plates is doubled and the distance between the plates is halved, what is therr iz; hehs7*9 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*a,;/+-bgkk oflwc r q removed. The plates are immediately pulled apar + ,bgcawk*qok/f- rl;t. (With the battery disconnected, the amount of 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 k.fo*uz (s8vg plates of a given capacitor is weakened, the capacit*kz.u g8of s(vance 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 are9 8n2cf5)cu5ybklvw stb g9mbst1 5b9,kc8 gc maintained with constant voltage by a battery as they are pulled apart. Dubb 9,8c2cbvcw5k1m n skg)cl59t u 9ygs5t f8bring 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 voltaglp;1 ofr/wl y.k:mlo 5 e42urqe by a battery as they are pulo :l o;yum25ll/k.w4preqr1 fled 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 adding a dielectric matyc 3m0zv o5fiosw,h9 *erial between the plates of a capacitori3m*czv,yo w0sh f9 o5.
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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 ca 43h;bnvm 1hdqpacitor. What happen;m143v hqhb dns 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 a capahdqm vic7w:f9 8c(v5zdsb 2y0citor holding a fixed charge. What happens to the electric field between the (f9:ch7d iwq 0vcbs 852 dmzyvplates?

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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 becomes fullg 1.w+7t jveb (:gobj0p:appjrx9 f+py charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in this c:1abv.bfpg:0(rw gjo 7p+ jppt9e jx+ apacitor 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 chaayr qw.9q4ha /rge causes the energy story a4haw/r. 9qqed 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 capatk.yb -m)em6(e 1b-p-1wqmq, t mgakocitor causes the energy stored in that ca1 e-mbtaw ) k1(mkpq-.bem -ym,q6gtopacitor 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 y:0 d v nnc:-oi;7yuw(thr)hfto point B. What is thecnwv:0(7hy f: iohn;r- )utyd 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, w amw2o rf;nz*ynt v,6*r nu.+there the potential is -50 V, to point B, where the potential is +5ua n*.6rv,nf t*z2r +tmoyw;n0 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 c7nb*57d h,gm z)f*yscq x0( 1ch*dkg lh*xygelectric potential difference of 500 V. What is the kinetic energy of td ky0qcg cx (yhs*hg7cldg mf)1z*5b,x* hn*7he 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 a 1t6 eyasnj,*sau 1/xtn electric potential difference of 500 V. What is the speed 1yx ata1s/s6u ntej*, 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 potl:zi0 fs k4 birvfk 45.7pjd)lential difference of 1200 V. What speed does sz b4.vrldkj 4f 5pili)k0f7: 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 ;o5w*2bmx k hcmoving $8.5 \times 10^{18} \; electrons$?

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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 acceldt ,y+hzd ab87erated through a potential difference of 500 V. What is the velocity of the +, bydtd8azh7electron 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 wj1qk.9 o b4y1dma7dw ar :m5tvut,d)from rest through a potential diff u.:5q4j dtdw1vtk)odaya,mb9wm 7r 1erence, and afterward 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 maint d*x9dx - ki8j5ktppbl6i q.e5ains the electrical potential difference between two parallel metal plates separated by 1.0 mjx .i5lq 8ik96-tdbpd5 pxe*km. 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, with a magnitude of 500 V/m, is directed parallel hcu uymn- ,:5v hljvbzi *)a9 cw/cr:*to the +x axis. If the potentiab,*ah5:lh crc/j vvnuuz cw*)im9:- y l 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 el0; 1hgygaa *5 oagd0ruectric 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 the voltage at a point 1.0 m directly west of that poin1go*0gdyhrg 0 a ;u5aat?

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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 tht,j sqr;z+f*rd - ncl2e direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy ofq-;n rc sdt +fj*,zlr2 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 0.20zvzjn0 tmej m6*o p79( m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negatn*9z jepm0 (z67movtjive 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, separated by 0.20 m, are connected to a 12-V bj u5wfp8:-;xx /(m m/eudwd.u, czgsa attery. An electron released from rest at a location 0.10 m fr(c/zgu djax . d-8xmwwe;umpuf, s:/5 om the negative plate. 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 12-V yuxhfqo;8(ijmnpwrv: d9cvn:i:2.) battery. An electron released from rest at a location 0.10 m fr:jif8cihyu:9qr pvx )2(:dnov.w nm; om 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:jsjb(dr s-ku7 ;4ug i/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 gb4u (judrs7; jski-: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 fieldb3k,orzx v/ n16k(qd73o e wex of 50 N/C directed toward the east. If the voltage measured relativxqk,bdwkzrn6/o(o331v7 xe e e 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 through a potential obo;(syjjk )2difference of 12 V, it will acquire a kinetic energy (in the absence of fric k;j )jo2soby(tion) 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 distancqzeujc0+x t3 (mzi/ :le 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 enlayx j73 q1p5cxje4zk0+oy4ads of a meter stick. Find the electrical potential for the center of the meter zjxaox3 0p q+clea741y 45jyk 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,s3fn/at.kh4p3) aqzg- gfj.u 0) 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 electric potential at point (0, 4.0t-3npu h3z a s4gkf/gq)af..j 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 (07) qt6 szsflu;, 0) 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 electric potential energy of a 1.0-nC charge at point (0, 4.0 sl f6uz) 7st;qm)?

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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 atx+yz*sxz( + bn (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be znys*z+ x+xz (bero 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 cornerot8 fw x9/1p fl)g chfm81of:ws of a rectangle of sidesf op8f9g:)o1 fl81wfhmc xwt/ a and b. 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 +ow pa;4u 6ki,j4.0 mC are 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 i pua4jk ow;,6center?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (charge8e71l*+ g(u9 lpuep hnbnw*u j +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 charges, each of 2.0 mC, at od8 uh+ytb 5(fy v ;uy5wqkx0; py)f)cthe corners of an equilateral triangle of;f(u0+ 5 8yf;c)tvo kqwyby h)uxd5py 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 1mb9tqfhkd ov-8h 4gf.dzy65 4 00 yvdb of 954-t.4mzk gf6dq8hhV?

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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 pl9i3smjt0mt8 d zd ; ahwtnc:94ates 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 airfk-,yyv072fsf,h qu t , and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, wha -q,y0yfu2ffk,7s vhtt 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 capaci06p6t kx- keih /tiu-ator 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 capacitor has a plate separation of 5.0 cm. If the pot tv92abff+ftolh u gycd 7bp*t 3)7;o3ential difference between the plates is *3bctdotl7 f+7fg foy9);vpb2ha 3tu2000 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 100-V battery. After thej/nq:n 5,;gm6 mksnak battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5):nsnagmk n;,m /5q jk6. 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 energyok,(ep1yb.sv cb( .tn is stored in the capacitor,o(.ys1. bb epvtc(nk ?

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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. f dznn ay70-8zl88rmh What is the energy stored in the capac 8ml08-fzznayd7r8hn itor?

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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 plsg:kd quw ;:2 1 utiae9)scb1sates of a capacitor when it is connected to a 12.0-V battery. How mucqu)1 wak u2id1 tssb:g sc9;e:h 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 i sr l7q4a)ie9bt k7o*zs 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 capaz-j tv2g5z i/ecitor 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 capacitor consists of plates of feiq g/k zo5+lx utz+3mwm.tfc- ;8c: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 plaif)4;9q0s8wjke :ygb0-xlzrj y v;r ates 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 area o: xlvq :rdduw c.1ckd- 3kp)5qf $0.40 \; m^{2}$ 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 capackpgq+9q1/a. ob2y fuiitor 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 becomes fully m6 z r y).peexu.llbdc2bsxp4b+ ,h8*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 is ins2 eyr)x dz* .pllh6pe+x bbm.cu, sb84erted?

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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 ansdc/-1+g pvqid 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 capacitor's plates after tp-+ dscivqg 1/he slab is inserted?

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