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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 followi l v beoaffvq hcyv./95;5*:lkdu;ky2 ng is 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 is a 3gfz yy2be6c0

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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 fro;of)nkpcn 2: pm their surroundings. Object A has a net charge of excess electrons. )pf c ;nk:no2pObject 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 thp ng8d4gxw)faa x:lm2m d3 j((e 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 op3b,k5w7.fave f8dyc cposite 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 conducting ssfmr0p(k+hq-u.l*rd phere. 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 s*k0odl q6qdnzj ni0r89xoy 17peed v by a 500 V potential difference. If the potential difference is changed to 200n 7q68x krylqd oz10*jin9 do00 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 6cl ak2smp/lvqe3: ta;l *rf- 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 pok9 ijknv:e,vk81 +ml 1ot5omxint B along an equipotential surface91 lomxn 1:kv jkt+58mivk,o e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential sura-hx2-9tup -/ qrtexg face 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 carryo r(vdf+t0 6 tauxc9t;ing a charge equal to that on the electronr uf6+;ct vd9a (to0xt as a result of moving through a potential 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 isq;j,;k5vfq 0di 5v-jz8wjuh n 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 cos /2y8nfrdx )srresponds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentiaeio metle:d 8jr;7h56rsng,;l at a distance of 2.0 m from a positive point charge is 10jd 5h troe7l6eri;g:m;,e sn80 V. What is the absolute potential 4.0 m away from the 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 u1;qp x: dz*sj8( 0rvtcc2mrw m from a negative point charge is -100 V. What is v8: ;q crt20z(rcdm p1*uxjswthe absolute potential 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 potentil)s tpacmw,s8aa:,s1 al at the exact center of a square is 3.0 V when a charge of +Q is located at one o ,aw8s)s map1,l satc:f 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 centefid 2fnan, 5j,a1sc rd0+: eyyr 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 squarefc:s,2+d y arj,fe50niyda n 1'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 char*bf0 v,iz,tx5 wwzj8h ges 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 ach26l o(z4x 1aryqxs2

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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 iiy)qul x3v-- cn every respect except that one has twice the u)-y vcq3xli -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 capacitor has awuiwmb(8wfau 96 (s ,o capacitance of C. If the area of the plates is doubled andabw,im6(f9o( w sw8uu 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-plate capacitor fully and then is ra;d +f *-zbarap+ d9 jt3vywl,emoved. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remaiz - dvadfpwba+rl;a t,j9*3+yns 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 capacitor mpo mqa5y9 q+7x f.qrx48.iv g,;rfznis weakened, the capacitance o. g.qfmm,a+v 58 xnr7 i;4 xqqfryzp9of 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 maintained with constant voltage bk (wlb/ ,6fk-d.lzr hx 8aue3dy a battery as they are pulled apart. During this process, the amount of charg36wblrl8zdu,h-e d(f.xk/ ak e 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-plateep+q:ul j4g4l capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength ol4+:jq ul4gepf 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 clg16degwd.gaj :y* 5ou6o1 vmaterial between the plates of a capacitor:lj1ddeggwc6oaou * y.6 15 vg.
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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 42nd9tg9gq 9lmnwf(nplates of a capacitor. What happen99dgn 2w9qngnm4(l t fs 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 capac7-bm k pz1b0jxf9.qk citor holding a fixed charge. What happens to the electr.0x-9mzqk 1f7bkj pcbic 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 chargedf*qgf0f 1o-w u y9pdt;ows7; t. The capacitor is the gdwoy-s 9t *7of;10uffw;q ptn 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 capacitor holding a constant charge ca 9hq-+nmj37fr-nl:hx)cs4m qw b nop0d3,urbuses the energy stored in that capacitor r 7q -hr9 :fn-3q,c)humbdnbj4xm03onw+plsto

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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 th;02n c f;befgbe energy stored in that cap;gf;b2e0b cf nacitor 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 energ--if *mavuusopt1l +sc 2;o/ky to move 10 C of charge from point A to point B. What is the pptsco/sa+*2-lv km -o ;ufiu1otential 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, where the potential is -gvo 73p7hmgm( 50 V, to pom3gov(h7g 7pmint 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, i7ban /)hb g27yc4bu)e+ns je ks accelerated through an electric potential difference of 500 V. What is the kine)j knne7 ebyc) /+s2b 4hbagu7tic 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 restqks8kf omn6vzjo 8 5 o(k1+fb3, is accelerated through an electric potential difference of 500 V. What is the speed of the proto1+8 ks3mo6fzk b8kj(fono vq5n?

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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 12a;*sxkn j6; rx00 V. What speednksa jr; ;x6x* 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 r ,;u f0f6cjtnin 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 po/4kjzab5 o)y98 s*z:elup pju tential difference of 500 V. What isaszp*u y j ) k8b/:jo4u5ze9lp the 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 h;)o y)2 k r3f8uq2*nv6ura1 rmzvzxh20 mC. The object is accelerated from rest through a potential difference, and afterward t83rrhy )uh n) zmva;62 1fkxvqzu*ro2he 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 maintains the electrical potential dmj l s-2w4ulkfu te8:mw20bucw)1)y iifference between two parallelm8uj:-yc4 0 2swet wu)m)1l2u klwfbi metal 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 magnitg56ktf9v;. x d4dzwntude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is thet6n9; zwvdd4 x5kftg. 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 dn/ mkzg .dg0ccx 1-cx2irected toward the east. If the voltage measured r1gk .dmcx2nc / gc-z0xelative 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 electric field of magnitudkrtl5rkgp w *4-a,x8k e 3.0 V/m. What is the change irtp4ra-,85wgk* x l kkn 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, separ)e vfsh ;lm*l;ated by 0.20 m, are connected to a 12-V battery. An electron released from reme;* l;s)fvl hst 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 q rlql-gu/0,bdcu-+ u, 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 plate, how much kinetic en- l0blrduu /+u,qg-q cergy 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, ziwyh7e8 g8h5b5k1(a t *avftseparated 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 ttaf5ie5y1hw k8*87( bha gvtz he 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/C directe1a+wu dky,g0pq u8xt,sfph 8 1d toward the east. If the voltage measured relative t1,qsu0wa 8gxd y,1k +utp8 fhpo ground at a 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 o. , wn8txf1rtmphl)1e f 50 N/C directed toward the east. If the voltage measured rela8hx,1pftl rn)e1.tmwtive 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 potentia;f7tu o-w y r(fslrx4)l difference of 12 V, it will acquire a kinetic energy (in the absence of friction)fr ()-rxwy;u4 lf7o st 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 on(q tigmu 9gfx,-9i0r qw 1ph,f $5.0 \times 10^{-10} \; m$ 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 z uldass,fxm(kq:wo w f/q+*zi 8/./da meter stick. Find the electrical potential w +zai qz,/dd*ukf:sf os./ l/8(wmqxfor 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 m, 0). If the pa5/ett39zk eog (ina:otential is taken to be zero at infinity(ea 3/itg9atkez 5on: , 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 (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If th1byr-29gi cya e potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at 2y1y9igcrab - 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, ny eejtb:1f:y0i/) 3 fw cvam70) 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 y mc0:7a eni/fw3f :bjey)1tv 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 of side;pe 37 xu fce2p3p::2lh xpmefs a and b. What 7p2hxp:excf32 :p; e3ep lf umis 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 g l-jvpn13 o/j-;us v-nb+hci mC are placed in two diagonally opposite corners.sg j1nl3 --vub-/c;ov j+ph in 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 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 + xsw6i8q ,s61r1pijh7jq i d2g2e, 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 jde3jo qk88:l8wjbd5 2bv 5zx, each of 2.0 mC, at the corners of an equilateral trid:bzj q 8b8jxk83l25 ewvdo5jangle 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 ofkw 6 a8h- gf+8vbcef*l a 2.0-mF capacitor when it is charged to 100 6kbfh8g f8alv +-*cwe 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 of area om0qu::kv.amzi *g mwb1s d+;$0.50 \; m^{2}$ 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 finbfx15 g- q)ddlled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plat bf1-x)dgq nd5e 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 capacito3.07 5zbl,nr9d n9+e kjyyd tirdx:yyr 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 separ wqq-rl2 tp+r9gd5*giation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the htq 9p+w5qg irg ldr*2-igher 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 ac76hwe58v kiczi/e6u zross a 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 remauz6/kzwi6 h7ee i8c5vined 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 much4qb xt5(a+ja*d b7 oyv energy is stored in the capac57* qa(jx oayt4 b+dbvitor?

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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 the jv)(cj j/( qgpcapacitoj)j/(g(v cp qjr?

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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 capacitor whceo-9uk+q7 md l t)d:;rfikc 7en it is connected to a 12.0ld-ikm9t derq+;ko c)7cf u7:-V battery. 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 sx9 ; aasd4i8 g:,d6us9/mekna 7sxclhtores $2.0 \times 10^{-3} \; J$ 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 c3.xsokd+ da 7qonsists 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 area /w; hoo*uw 4oj$1.5 \times 10^{-4} \; m^{2}$ 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 plaizu.jjx4bwd,gd27u+q:cmd 1f i6f*n tes 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 constructe p at;i1nc 2e.tz 8zfqrezlkf0p ;:(.md 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 capacitor is constructed wiu5aowjb mi51(znel5-jy j c 7 n)*ht*tth 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 09+ 3wh ymffd hs )kgqrog+3;kand becomes fully charged. The battery is removed and a slab of dielectric thar hf+wmgfysgkh33q0) o;+k 9d t 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 charke: j*u,a4kxhged. The battery is removed and a slab of dielectric that completely fills the space bet4 xake:k,*huj ween 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 inserted?

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