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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 vec 5)z tt.b)qd2 dz fw2egt 77u;ggmk9egtor?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombx 3fp-q-sx.utckq6qjn 3t2) ) )dblqo 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 insulated from their surroundzz k-h(9is5u bings. Object A has a net charge o -h5z9u(izsb kf 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 direc6p1f byhv3-f 0m c *u:gboaw*otion 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 to the ele;4/e wtmigj,sp t.ub/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 placeq7sc 4o nm*x,u0qpz 3zd 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 fro5y4xgv 1 h*p*8wuygbfm rest to a speed v by a 500 V potential difference. If the potential difference is changed to 20y 1x* pug *b8y4vgfhw500 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 re4gjc( dkaao*,ioop1 wnb +;o57 zg3 tsferred 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 ank+vr7 8c-i)u f4nm;b tussct(-x rv6p equipotential surface.kxbr p+nc-ti8 uv)r4mf 67-tsuv ;c(s

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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*cc:. )lbz(lqf q /jgiust 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 thet- 5 )4l7ds2ogwdshl b electron as a result of moving through a potential difference of4- 2 5g7lst)oshd ldbw 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 unij1s:ys+ :jkx:nhtz ,r/9hgo c t 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 correspondq hcnj)sly7 5-s 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 distatkufi6p0m:d 5a,;1uk ;f lwe33vxvjbnce of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from tat63 fvd1m5w 3kux;0ub ,lkfe;jvi p :he 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 at a distance of 2.0 m from a negative p0 6yy tznsech +n/u4as dgnu(f/:sq 25oint charge is -100 V. What is the absolute potentialscsd q+g/5/6sh(nuyy4ua0 ef2 n nz:t 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 is 3.0 V when a cf3zy0cu63l5 zqn x5 fwharge of +Q is 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 fi cz5f33qzf0w 5xn l6yulled 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 cbzda. 05/gfa1aeb( ft enter of a 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 squaredtez/ 0ab.15f( fg aab'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 chargesytt/hps + 8 ( rtt4j3gfspc.+u 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 aqwxi+*(z .wzz( dzb g)

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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 eveqjbq9m,rdcapq )e 0 1*ry respect except that one has twice the plate area of the other. If the smaller capac)1c90 pqe jmrbqaq*d, itor 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 C8kwul)i o a*4 (:hbdhi. If the area of the plates is doubled anda*h o:iu4wilb) 8kh d( 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-p4 :vlw9y i;z6iq)g rcdlate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to tqlv giyc9z;)6 i:rwd4he 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 bet,gwb bykeuo0 n,ikb j/7ugzw 9*; 4xp9ween the plates of a given capacitor is weakened, the capacitance of *piobubwez;9,k4j ,b / g 7 yg0kwx9unthat 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 with consyz ybst o0z0)(tant voltage by a battery as they are pulled apart. During this process, the amount of chargeyt()bzy z0o 0s 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 mainvd; d aufk ,h*upb58a-tained with constant voltage by a battery as they are pulled apart. What happens to the strength of the fb ,d v 8uaukdh;pa5-*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 for3*ypqp:o.o buxo5p **p oh9 lt adding a dielectric material between the plates of a capacito* y*potxh:pb* 3p9uo o5 q.plor.
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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 ,u,lgo wkg.q/a capacitor. What happens to the capaco ugk ,gq/,w.litance?

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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 b:rxf5gq:b oboz 4ydg8of5: h,etween the plates of a capacitor g:b gfooy:r55fqd:,8 obz xh4holding a fixed charge. 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 and becomes fully charged qkh54(;gbp bk. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. gq p45k h(b;bkThe 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 charge causes the enagykcv rijt vyw 35h;9j(p8/ *ergy ;a(w hijtvpy85 v/r g* yjkc93stored 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 g2*mxqb; zw7spiven capacitor causes the energy stored in that capacitor toq2 m;7pz xw*sb

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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 l)2urb86be if charge from point A to point B. What is tu fbe6l)i82rb he 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 elefbtnd9v9e9, ilo:cj( u)r4zj ctron from point A, where the potential is -50 V, to point B, where the potential is 4l (9d onbz9,:jrejuc9) iftv +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 7ov2kje2jl+ g through an electric potential difference of 500 V. j+ 27kgj2oel vWhat 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 accelwk; nf8aga(9v erated through an electric potential difference of 500 V. Wha8wv9aknga(;f t 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 fall ;fxm 5rs)(jfgwkl7uro ( 7q8os through a potential difference of 1200 V. What speed does it acl7wxmf k 7)(rqgo(o 8s ;fu5rjquire?

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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 hg:k7c -fn4o rnlhoe23 4e-mado 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 potentijg vk;)g40 4p 5/x 1qptahsj4x*wmsf aal difference of 500 V. What is the velocity of the electron afterward?p4j4f/s xxa gh;taj qg5)pskw1 v0 m4*

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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 acceleratec11) tz )nl8rwiquui3d from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential 8wct3z)n i uu1 ql1ir)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 2avtn9:g,b p qk +k1foelectrical potential difference between two parallel metalq19bak o,+2fk t:g pvn plates separated by 1.0 mm. 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 v3m :(q)sk 1v1 n4vfelc)dyvhto the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential afnv q3k1lhc ms)v)ev :4 y1dv(t 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 b1g o7-wi8knf50 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 k8-fnboiw1 7gdirectly 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 0md) 8u t pyidv80/kk)dpuo 5zthe direction of an electric field of magnitude 3.0 V/m. What mzd0p0idv d)u8pyt8 k)o5k/uis 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 0.20 m, are connected to a 1xu( uz waj-+(p1; ulw y.p4 i2lkktqe;2-V battery. An electron released from rel+k(w-aq . yjt w;xzu2k ppiu;e1u(l4st 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, separated by 0.20 m, are connectp vs u9dm aj9h+(4ss(4qynb 6xg02szyed 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 distanceb s9am hgun4sy+(y 6sx2 9z4vsq p0j(d 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 batt: ,kp 6eljcae tbt62 5tvcv;2mery. An electron released from rest at a location 0.10 m from the negative plate. When the elect;66,cv:pttvla52k c2 j temberon 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/C dw8wu)rs )6+d9ffmd f lirected toward the east. If the voltage measured relative to ground at a given m)fs9 l)u8 rfd w+6wfdpoint 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 fikjj:8deu fuh7n1j n;; 3lgq ;held of 50 N/C directed toward the east. If the volta 7j 1fj qgu;;dhkln:u3;e 8hjnge 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 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 throco 7.5+deocwqnunm2zog 6,/ tugh a potential difference of 12 V, it will acquire a kinetic energy (in the abs2wdm7u .e65 + qt ongco,/nczoence 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 distance hvk 2n dzaedt(k6s7g)r1rql 4p 9rftik( ;e- *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 electri2 ycdof;hzy1jv, x)72g c1uu vcal potential2hv1ozjcuy )2uf7,x gc;y 1d v for the 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 -2.0-nC charge is at (3.0* msgo 5)iq6hw m, 0). If the potential is taken to be zero at infinit) 6*w hi5gqsmoy, what is 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 (l0e )(1 c(vzpok*seim0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential zis( ce0mvel1(ko*p)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)?

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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 -2h)3+ o.uqvok *ipi-gi.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the w)vi+o uk* q.oih3ip g-ork 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 corners of a rectangle.in 16: 9l+;g ohut xq6o j2mfxovb(joqecy ;* of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, ; o*oj.y (xoxonjlh6bvg;u qe :9it1+ m6f q2cand 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 placed in two diagonah (1l j38dyqhdi*ijf6lly opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What ijd6(1y8d qlhif 3i* jhs 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 (charge +2e, mass2jxi r1v+ u:gcgqkr. :4wjcl( $6.64 \times 10^{-27} \; kg$) 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 toep.hc w h0zlag2z02l6:stpaqj84zs6 place three charges, each of 2.0 mC, at the corners of an equil200sws84epz6zp la j h6tl cag.:2hzqateral 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 plates of a 2.0-mF capacitor when it is charged to yt0.hhrd+, dxo c-wa k-6o:hfe- gx4 l10 6glayr40,+oxe- hwd:kh-txd. f hc-o0 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 capa0na u/ e1)zidlcitor 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 capacitor is filled+f wizoo- zwvh/ r0b.8 with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the p8-b o+ vzfzi /o0w.hrwlate 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 are*rwk a, ut:l/ka $0.20 \; m^{2}$ 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 seveab 4.4v+lfkparation of 5.0 cm. If the potential difke vb+afv4l4. ference between the plates is 2000 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. Aft yxtc,.o n(h:mer the battery fully charges the capacitor, the capacitor is immersed in trans n hxty,o:m.(cformer 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 id5cr3 -ecyw +es stored in the capacy+ec ewr-c 3d5itor?

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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 stored in bm)( ;6g +cgdkik)7uuzk eqm -*ku 8sdthe capacit7m egd )ku)mbu8g ksz*;udck6 iq+-k(or?

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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 flow; rxk*je/)moz1* /n1cx) saxf d3q cbos onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was donrxsz/c x3e1*k)bc q1mfn/*;do xo)aje 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 that1cxde uzcc,ly;9f7 e * 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 area jw 5i927ha xcp$1.5 \times 10^{-4} \; m^{2}$ 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 ar) hz7( hx:iq5wkavjp2cr1 r q8ea $1.5 \times 10^{-4} \; m^{2}$ 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 capacf6ebuk4 ;/)mbq3h( xuexsd5fitor 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 with platenj2r: * 8 (zuh (itxmlcmg s1,3ffsaw4 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 gh+u j70 o unja5iu*0ve h*nh-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 andy+ nnm: 0(nuzta8wx8p g-ueh8 becomes fully charged. The battery is removed and a slab of dielectric thatn- ( nyx0m8+puthazw:ng ue8 8 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 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 charxn jl5 9kodntjjy 4r1.i :)3rxtkpz/+ged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If .:ki/jtl9x+rojjk 1pr t 4 nzny)3 x5dthe 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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