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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: 游客未登录  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 rsn,sw t, 5xao)7yt1c xiji f52s/5rais 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 6je)-d et n+8pc8skrs 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 aluminum objects are insulaj: k xcp050wdgdcm*6 qted from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher pojgcpx qkwc06 5d0:d m*tential?

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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 dir)i:lymdu4c q;(y+vcto 3 iq i u.q9f3section 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 moviz bgt .ih2z53whaz *a6pf(x*fng 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 conducak95g-py.,i:w3gh l ah)lc gi ting 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 v 6 7fdmzjwz0 .fby a 500 V potential difference. If the potential differenjw6zdmz0 . 7ffce 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 a s*f e9/dklur 4vv8i;tt 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 : wjkx-ow 6y7xalong an equipotential surfac6w w jkoxx-7y:e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfa;9n9n5xzsl mt;l eahon l9q34 ce 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 carryiny c82 ck1vzu0-i9wg n7s sk p6arthc6/g a charge equal to that on the electron as a result of moving through a potential difference of one volt cy /hwtku p z71c-scgs9ka68in026vr 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 uni3 gr/ 3 wjk*l-us)ieueie2p5rt 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 correspond jjz mqf*i8/tdq8q69ds 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 is 19yn;wwc6; etd+hf p/g *bml3x 00 V. What is the absolute potential 4.0 m away from the same ph; n;3 pmg*d9f/ eb6w +ltcxwyoint 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 mjqcy.1i 4lbh,uo lk97f.d:g0vh/kizl x ;m7x from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the s10lokgmi9.fhi:z /x;q7l vl d4xu,7.hkcyb j ame 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 5ak- d+ *wh htisq7)kkat the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's cor*hk5hdi k+s7wk a)qt- ners. 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 a square-) bst6wde 5jq is 3.0 V when a charge of +Q is located at one of)wb65 -ts jeqd the square's corners. What 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 c;;:h30 fn rtns f xdju+*tt+hnonsist of 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 is a b1 59(grqeozi *de:ux:3i urunp:q)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 o vv(c:/ufr hx a9891yz p jomm*sb-v8ene has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitanvmvx*h (ufe8o m9v8ry/:cjzs1 -b p9ace

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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 ae.o :g6sd81gbhta7 n0gg* )qxids 0f,tbf6pq capacitance of C. If the area of the plates is doubled and the distance between the plates i1eob66t7,8 nq agsihf g0d: g).* btdp xq0fgss 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 c z-2o xdov e8ykv***ms(q1 e.akx nl3japacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) xv as(xemn2k8* jvoq13d*.kye-zo l *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 4;n5z8 wvm tllh;2:m. osw oegthe plates of a given capacitor is weakened, the capacitance ol mo4wz 8ve2 tn:m;hs;5lwg.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 maigf*sh c-z7 +slur2/kl ntained with constant voltage bykz7uh s+gs* f2-llr/c a battery 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-ma 6 b/ibmcol wh/(o btfag2k; q;o1;-plate capacitor are maintained with constant voltage by a batteb o (i1ko;afg2c ha/w/qbm-;lt6 bom ;ry as they are 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 addingo*p7 y ,l+yxwt a dielectric material between the plates of a capaci7+toyx yw,*lp 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 papgmm/4m fn58zm6olqw+ er is placed between the plates of a capacitor. What happens to the capacitancewfqg 6m5lz 4m/m8onm+ ?

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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 pa:6jt +bnr/el kper is placed between the plates of a capacitor holding a fixed charge. What happensejbk :ln r6+t/ 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 jh( jicl2cr zu i,f(y688 pxz; w)vcc.and becomes fully charged. The cu(,c.)cx 88;pr(2jc iyivzlz j hcw6f apacitor 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 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 capabr )pbz7jxrv 6 w 3hnj4he82s;citor holding a constant charge causes the energy stored in that capacitor tojh8 h x 7w3jn4r)ebbr;v6p2zs

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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 thq. 1re+zc0n hg8x e;byat capacitor t y bg0 ehrn;+1xe.zq8co

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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 rmbv: b24kj1tj:f d irwl5f4(to point B. What is the potential difference between points A and 5d42b: kjf:itm bj 14(vwr rflB?

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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, where the potential is -q,utzp u+fh:3iaef,1(+xc .p hjtd/ a50 V, to puaapfe t3x+:c p,d +t1/zhu.j f(ih,qoint 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 accelerated through an electric potential di7+8 hur em;fqrfference of 500 V. What is the kinetic 8h;m+ef u7qrrenergy 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 restz 6kj-cr 4wp0d gg(p 4fv8f1jr, is accelerated through an electric potential difference rjwcp z4-jp g8fk 10( 4r6vdgfof 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 a g(5kfx-q h:su potential difference of 1200 V. Whagk x -5quhsf:(t 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 9.0 V do in movingag10f c3mvbh: $8.5 \times 10^{18} \; electrons$?

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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 s9aqy(mt j9j6a potential difference of 500 V. What is y j9 tqjsam6(9the 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 acce)*8 zx5uandv,st/w hllerated from rest throutz)hav*8nsl, d5 x/wu gh a potential difference, 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 maintainx( g(1k x2ye)*dl cxcbs the electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between td (x(b l1cgyxe*xk )c2he 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/i uug qcr2;q -n+ntt1+m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2+ t1r2tq; -cuq+ing nu500 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 the east yvgeymglw ls8 sdt ).10w::k(. If the volt g8l1gtmsw: :)y.vke0d ys(wl age 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 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 elecu(je/jfog.sol; 8 qx 2tric field of magnitude 3.0 V/m. What j gx8u/ el2;fqooj.s(is the change 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 qcy9- v(xa/zt 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. xqt -(9/ czayv 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 conneuqpdeltw6 bvmdt kpj1i( e;3;a/;e r (1b;2ixcted 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 positivera3 wtmd l;6d((1t;/1ie;bui kb2p v ejx;qep 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 0.2zlc 3nbodr;/+;kf i;k0 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.;li+r ck bn3;dzf/o k;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 towar, 9m 2+xiifmt 1eg5obay,/cqgd 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 dirt951 mfxbo/q2gy ag,iiem,+ cectly 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 fs80 yex-bj(q:gkoqh3. vig hki../k nield 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 voltag/ j0hinyvqsg:-(iok kk ge8 x.3.hb.qe 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 differenceo5kp ab3cfm6ow*;tlf v ,2 nt- of 12 V, it will acquire a kinetic energmt bw ok- fv2*,c;f a3nt5o6lpy (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 t*)u8az-7 lqhj*l deqa 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 stia2xe4y frp 8ruewj/.: ck. Find the electrical potential for the center of th 2x4.fere8ur w/j:ypa e 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 charge is at (3.0 m, 0). If the po5eccg1- p8zi 0m2m ie hr.x5ietential is taken to be zero at infinity, what is emi0 .i58g-c1 2eh5zpcxmeri the 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 isj;:g6 )h f9drova- nuh/vc.g c at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy o) cc;:-uh j/gd avof6g 9rhn.vf 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 7a +hjl pos3al k5(/0ybg9hmck u6(ldcharge is at (3.0 m, 0). If the potential 9/ms(ykkho3 (lb6g7 l0l+pchja5adu is taken to be zero 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 tvk dhkd-,8x 6+q are placed at the corners of a rectangle of sides a and b. dhk x8kt6d- ,vWhat 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 orefj;q c99x 5 vug,t3tf +4.0 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 ce,ux gt jv9qftr9;53 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 17yh-bbu ,mh: bfuz8us9.lmo +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 toh 7g udgi2r bhg,84;sb place three charges, each of 2.0 mC, at the corners of an equ dhgb 48sig2b7;,gurhilateral 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 thxrt7 1 tbqtnp6z;smsg/ip*- ; c,a ji/e plates of a 2.0-mF capacitor when it is charged to 100cpt7tt*m qp/b;,/ijsgi a6z1 ;-nxsr 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 pla7pluy s;wi1xo foxo (dhd;2 99ux+0ijtes 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 air, and the plates are separated by 2 ynx0 :5:i4fxcio2amghkcu, 0.050 mm. If themi2g,o20y5i ahk4 c: uf nx:xc 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 has plates of ark 7sh. p:n 1ya-efdj bze4rj7szl-+ 2aea $0.20 \; m^{2}$ 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 capacipbceu 8n28ny5tvr3 vh-ij 4 ;8usq;intor 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 poten42; v-v 8j8ticyun5h 3 ibru;nsq8pential, 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 acr5qputf+f: tx *oss a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersedtf u+fq t*5:xp 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 capac,,0i5)fqgq:xp b t -vco ao4voitor. How much energy is stored in the capacitov- p,xo4: tf0c) qog 5,iaobvqr?

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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 e*( +*e , hor-nrqajijsnergy stored in the capaciq,r (s+j*jne iar*oh -tor?

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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 o ja( 5w)/ljumc6ql )nkf a capacitor when it is connected to a 12.0-V ba)5l 6 wanlkjm)(qcj/ uttery. 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 stores ;y k*,jxv/1wd yjha:m$2.0 \times 10^{-3} \; J$ 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 p5 4c8pjst 6.s3g i9n foychzg(lates 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 vrnhx*.81nh-q7ipmyj o 8:n uof 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 ykg.)w8c); oh-i dvzut94we/a.d kqz 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 construcm yb,q,h*c.r ited 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 capacx x(4mr;bwk.c cac0 n/itor 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 beco/69qd ) ibtdqilnf 8y;mes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted iin db 8tld6y;)9qfq/. 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 charged. Th/ehexj4am e ,6e 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 the slab is insertedxemee6/h a 4j,?

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