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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 n9. ,t6oerok csot 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 ij* ujew,(1aq 4e t1 h2:aqegigg85 evjs 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 insulatm0 mv.urj85/sp hrf8qed from their surroundings. Object A has /fv .qm5r8rhpj8 0 smua net 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 electric fiel9:q521 3znmw azs dhydd

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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 direciy 5 3.hlzdzm:: -:iy aimzz0ztion 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*6huo t.w,fuc 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 from bh 8dn- ne y3bh*jrb21rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed o d*y-b jbnh82 1bnreh3f 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 pointsln4fqju :r 56r are at 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 poixeoe1jo ox8z0ut q2-mk)wf 8*om;u(v4d 0kpmnt B along an equipotential surface.w1o qu z4)f2ooxek; me kmuv- o808(t* jdpxm0

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mu1 0sz,pl .:0v7ik/lnb pa xtwest 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 b.;swcxky630 c* hoa: pg:ucq ry a particle carrying a charge equal to that on the electron as a result of moving through a potential difference of onha .co0ky*;p 63:c u:rcwgsq xe 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 unitfgn75kc8zyh nid::s :9emc27d1 ofb y 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 correspon+tgj g k :g9vjz3tf+w-ds 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 ( pin ,z49bnil2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from nbl zini ,4(9pthe 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 potentian-z4qq mbd;icb /0u(g0x-xr rv m e:p;l at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m awaxmpbei0r:q(dr0 4x/ nv q- gmc;-zub ;y 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 charge tz g7 g k0/ttp4mk7r8rh)k5fbof +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 m5g0f k4 pr8th kzr/b7k)7gttlled 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 squw. tw-.z vdq1)wt3gvw g xk)n-are is 3.0 V when a charge of +Q is located akq- vg)3 xv. gd.wwwt 1ntw)z-t one of 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 consiss ( gi4zux):-xolr,ytt3*)xwo8xm bk t 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 i)xqjvzyd + .h+,nbt)wg :/eyqs 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 ilnc b co 3h*,dlx7rr*8dentical in every respect except that one has twice rcl 38l,7 d**con hrxbthe plate area of the other. If 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 capkcv 0+iwox9i9o c7fa j * p)kqvkdg90:acitor has a capacitance of C. If the area of the plates is doubled and the aji w99f)0 :okgvd9iv7c+cxqpk *ok 0distance 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 p)cv1fr8c: t(gx3+u2vfdj u(bywtxd 2 arallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. vdg) 822fxxfb c v+yuj(r(tcw:dtu3 1(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 plates of a given capac29j ,fu +) e8qx;opl0hzviib* y:tpwaitor is weakened, the capacitance of that capacitorotal jefw9 xzvqh*+)2 p u8bi i,y:0p;

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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 arm q;y2p;.+)aa ts cezke maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge oea ym 2;s;+p t.a)qzkcn 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-px 3anl7ay7b, 8qbapaacl ks / m/9,v6vu0v ,uclate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to ta,l/uqv/xkp8baav ,l,cs 3n0 am a97 ybu6v7che 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 betw 9m5 .hiy-3dq ool4hupeen the plates of a capaci4q-lp. homoi hy 3d9u5tor.
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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 pzxyf l +d9o:8btb. p-rlates of a capacitor. What happens to thrxlpbz8b.o: d+f9ty -e 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 hpwj-p9 (9r5zdkip7jplaced between the plates of a capacitor holding a fixed charge. What happe7p 9jhp pkji5wr(z9- dns 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 capla( zu 1jfl)i2 xpqd-4acitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the platzqf4ju la) p(2lx-id 1es 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 capacitorqy)(q9zb 2r3pqt p+pv holding a constant charge causes the energy stored in tha9+bqqrz )tq2p3p ( pvyt 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 that b0jp67db 1*zs tjlg4i ,vguexcr6,c8 capacitrb8,1 je7xcvls*4j gc,6d u0ztp 6bigor 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 poyr*mol,/4 fwuwbw, zkmm0 f/uu/7io w+uf+d )int B. What is the pot+fwmrd)ouo/i0 7u lw4+u,*f fkyz m/buw,w/m ential 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 pojgy/v(f6 a cqa) 2cpxi(ac66fzrx-.lint A, where the potential is -50 V, to p/ax 62g.) a-(vypq fc6i6(jar zxfclcoint 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;*3r mnn())sepg m4bowe f8 gl an electric potential difference of 500 V. What is the kinetic enr3*p)f(8ngme s4lme;ob) n wg ergy 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 accelerate2p79he pwmc7 qj)vu4pd through an electric potential difference of 500 V. What is the speed of the prp mc7v jpuqw4pe7)9h2 oton?

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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 difference of 1200 7kbnq8y 2ivq*) i ok*xV. What speei8q 2yqkobvk)xi *7*nd 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 9.0myvnp5 . )sfog1ac3r, V do 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 potential difference of 500 V. Wtn5 f;b p9/ve op-;bebhat is the velocity o;9fppbe 5 enbv/;-bo tf 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 accelerated2) n60ggla1d8ao bjna from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the ma jd0b2agn6 nlgoa1a8 )gnitude 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 potentwr15kkdfjyv9i 4r5h2 ial difference between two parallel metal plates separated by 1.0 mm. What is wj5v1krf5d i29 ky4r hthe 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 ma 7pi c/+teb- ;tfvs/bognitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what i etb+ bf-7tc;/sv oip/s 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 oi5 d5 rmsa5uc/f 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 diir5ac/m5 5u sdrectly 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 electric field o2 ezmf/,yt+o:* f d u+,smsrryf magnitude 3.0 V/m. W*u2 rs,fs ymyt/efd+mz+: o,rhat 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 0.c(xtf a:o2jnl mohn7dpziarf:*z39z ) ww,9 ) 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 1.50 m from the positive plate, wha9,: 2 h7oz rww*:zx9j(oc3fa zflni p)dantm)t 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 t.djg; wn7fj3l o a 12-V battery. An electron released from rest at 3l .7;wn gdfjja 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 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, areteq3 aisa;( w;h;l m-a)va 0lq connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate.0 ll;i(ta3;heqv mw;a-a sq)a 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 f /-zdr6opxaplr jv.,2ield of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is .r jdp6ro2pxl,a v -/z80 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 the jcup)m+ *hx-reast. If the voltage measured relative to ground at a given point in the field is 80 V, whrhx * j)+mpc-uat 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 difference ofyl:hanay ve, e3sn7p1 j)y:l) 12 V, it will acquire a kinetic e:)sa,n)yl j31hypnyl v7e:eanergy (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 distancg5c u xv1jx0f7dg cf4,j,aj6we 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 a+b f0aguq1 18khkd*y ed:qf:meter stick. Find the electrical potential for the center of d fbk1:yug ekqa+f1:ah*d q0 8the 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 (pt;lca , w6h 3/ixq90(tyqvcy0, 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, 4.0,3vc0 96q h(aylxqc/ ;itt pwy 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)zs(j q5zmh6k, 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,(5jkm zshz6q 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 oebebpst2 9nk.)tr* 7)+wqax at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work requitqn+a btkw *27) ee.s p9)orxbred 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 e1kr fc4 e.5f 2pd6e,og 9podt+q are placed at the corners of a rectangle of sides a and b. What is the potential at the 2 oc59,peeft.d 4ep 1kfdgor6center 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 c./qjvc;b -ow0qe6da a side. Charges of +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 mvo6 qqdae-jc ;.c0b /wC. 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 (charge +2e, mass0hiiwj;z0a6 e mp (ij1 $6.64 \times 10^{-27} \; kg$) 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 nece5u; h(f.z,e9o4qjj a,prdvm oaha+f (ssary to place three charges, each of 2.0 mC, at the corners of an equilj , u(hqfa 4aohjrf9dvpzmo;.5a+ e ,(ateral 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-mFv5;gxbvci9l8q,d(hs /lrt 4 j capacitor when it is charged to 100 v9h4,/r t8b l 5;x(gdvsiljqc 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 plates ofo35 iu ;pnak6oxxiz(0 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 capa6uiro:ybsz w,sfag3n/gl .zw (3is p*j8t *w)citor is filled with air, and the plates are separated by 0.050 mm. If the capaci3 *a*.ri/ln,twgsp s(b 6wf :3wz8oszgj y)uitance 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 ofjjbgd 9 52luk.yn7ck: 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 plakdnh,c y )acis v q6,r*sny/1)te separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, w/* vyi1s)ac, yhk) n6,nrqdcshat 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 btn t:h)z6r1ta 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained connecteht6) t:rtn1bzd 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 planm.nvxa;8:l pced on a 15 mF capacitor. How much energy is stored in l8anpnxm:;.v the capacitor?

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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 mFi zv-:4:oqeqwtuf(b. capacitor. What is the energy stored in the capac-u(w .4v:zbqt iq o:feitor?

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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 ab)o(lpgh nvo/5lc2) 0qk 4z.h 2grxvn capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capachz. b2q/vpolhv 4(xoknc0rg5 gl2n ))itor?

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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 isglx .dbv i2ofm,;n(3 e 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,zjgd ,gopkzx/t i2:1 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 ofnb6)dkd10-cqnksga- n )l.eb) n uj/u 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 plates og2 z72-ba egqfwscj0moq:9;dqre z*6 f 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:q7esz y jd/vr8tz: /c 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 capfh2nqe hsbw a6;8ul6* acitor 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 becru -mm9y 5/ghukx9 l0kod09s:)gkonz x2 ; zlwomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the )o-/ gl0mhxkz9x50g 2kyo;sl99krzwd n u:u mplates 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 tp avh*q)h,z 2zo a 50-V battery and 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 zh hzp*av 2),qplates after the slab is inserted?

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