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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 nothm h;9c)7cd5)y.uigef+tmv s e( r5fbmj; dk1 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 coulombt.ej( ic zg)5wiot1t bx6:v- s 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 s) v (ajg(xvs7/a2pmgourroundings. Object A has a net charge of excess electrons. Object B is 2v p(s xggm7 (oav/ja)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 dirp4* /mfumkp(2bncn,e wc:j:rection 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 2.,/4wb,xuibp ; ek1 riwqt iv(nacx )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 conducting sphere. e ftz1ghm95t,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 ioteb 2d p(*e p725q6ct(wwp dos accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of th726pqto(d (pdo5*e epc wwt2be 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 areuru1 jwtf71 v2 o,o (:kgf7dsu 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 point B along an equipo:zvnt9pv1e q4 c+r7 uztential surfacez u:9ev4tq71n vcp rz+.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must n c/ orhu(cz1y2e3,qn(afzd2 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 carryt3gxlc2dy9kvi1o,-xa ik0 jhdn3c hv ,3f3l-ing a charge equal to that on the electron as a result of moving thj n,h 3vlii,v o3k 9a-cy- ghd331 fd0tck2xlxrough 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 is a ug ;:n)cmrlc5ib6hhl, nit 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 correspo,nm uyss zb5+.nds 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 ch(sk* lsv9zkhs -+ fk7uarge is 100 V. s(vf9l su+kh k 7k*s-zWhat 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 m from a negative point chargeflv8)3xa ckl/dry *uh-:bko fo ec2)x8x /:nv is -100 V. What is the absolut:2o)xl8v- d fuy vbe 3ahcknrkx8xl/f/co *):e 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 potential at the exact center of a square is 3.0 V wh9c45gxxchfps 7*znw o* ,j/ py0ak1nzen a charge of +Q is located at one of the square's corners. What is the absolu4scyp oxgzk0n nwz5 cx hj/,9f7a1p* *te 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 is 3.0 V when a charge 0p n.k ta+wv0kof +Q is located at one of the squar+ k ak0nptw.0ve'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 consist 3b1kem* ywe7 c+(evggof 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 / vk8x2 nh 2h87wkebfca

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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 that1c ntvj/wa,ly24 er4r one has twice the plate area of the other. If the smallervtael/ w4r2 41,jcryn 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 of C j z5+kuhoqsxhr**r:1)z0y ye. If the area of the plates is doubled and the distance between the pla z jh)u*:ehsy1ozq*0k5 yr+r xtes 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 remo f;g4ym )b,kseved. The plates are immediately pulled apart. (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 bekfm; g,e4 syb)ing 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 capacito1 oi1nyfw ,/d+x zeq8wr is weakened, the capacitance of that cw1,f18oydnze i/qwx +apacitor

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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 capacitv6 2u;ru x.q8blv; e-qj3 3vp)putfrtor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of r3v t l;fuj.ux u6rbe23;tpv8 pq-q)vcharge 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;i+pgiun k,h 2wz:7t z k5uy-d maintained with constant voltage by a batteryk p t+-n52hzug ;7wykuz dii:, 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 adding a dielectric material between the plates of r ,(1cweot,qnm1t fl3 a capacr1,fn3w,( qcmoet t l1itor.
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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 bpht:3;hkh 2on(mj .e:r6a;5rtvjeo the plates of a capacitor. What happens to the o;:.ehm b orpnt 2et5rvk;:ahjh j(63capacitance?

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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 ash,wvqzt; f3 t ; sf:-maw;4ovw paper is placed between the plates of a capacitor holding a fixed charge. What happens tsoh-f m t 3 ft;,;wvqwz:4w;avo 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 conneei24y0ia1dqx g*ue1 9lp(fk mcted to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increaekx 2e9ql04f1 *iiayumgp1 d (sed 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 char/n;hhvk v cr3m) z2v6rge causes the energy stored in t )hnrk6c hvrvv3mz;2/hat 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 energykq5 :6 u5mbrap stored in that capaci5rbk ap5:mqu 6tor 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 toev/r 5 1opg:zj move 10 C of charge from point A to point B. What is the potential differenp zrj/vg5e: 1oce 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, wherc*qp+- l8p/7tb2evzeqq1lh- uyxih f+s:4 eke the potential is -50 V, to point B,ub8ie4q c l h+epxk7-f p/- z*vyqeqs1th:+l2 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 dif4dpesv-9a t biyqog14i tkhq c;*+o60ference of 500 V. What is the kinetic energy of t-6+o4k4*qov9a ;i 0syh1qic tgbdte phe 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 an ;6a2aa5k *nq; oddh,1cs rgvaelectric potential difference of 500 V. Wha;2*ndr c;6qaoh, d1gasv5 kaat 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 potenti8li7 fkossybv/ vzwo87ux oq:g1) ,j5al difference of 1200 V. What speed does it acquiresbyjg,xl uv7 o/qs1 v )z87wo8 i5f:ko?

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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 9iv+cx87)/t*o,ym rk 1ly srnh .0 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 diffeb .1gg7pk1 f9-vpvw; 1op wnanrence of 500 V. What is the velocity of the electron. 9pvb7v wpk-fpn g1g1aw;n1o 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 charg*+ uidd)1x qog c88snpe of 20 mC. The object is accelerated from rest through a potential differencsgdcpnd88x+1*q) o iue, 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 maintains the electrical potential;fphee o 4a0h2ear75 c difference between two parallel metal platrea20hpe4af 5oe 7c;hes 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 V8b xh j722fm9fvbvvn4:x9wzk /m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, wha bv7f n jkbfwvh8zx :29xv9m42t 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 f.a9pl t8hnf zy (g3 ol,9ck5uuield 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 that9zfk ,5ugo(p.8nlt lh93y cu a 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 electunx8gy*hehj d;w (,liew2 xz o52m :c1ric field of magnitude 3.0 V/m. What is the chawe 1wdx2gn2y (hl5 ,izjcmou;*h8: exnge 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 connect 8d 0ql ;xa/pp7bypk2 gz:mcz4ed to a 12-V battery. An electron released bpyd/ k 70;g:p4qlpz2axzcm 8 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, 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-zb1s fya.c;n a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When thecb.; 1fzs-ya n 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 12sm331 ai0db tjj;)waq -V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a d)3wdb1ai03 ;jaq tmj sistance 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 eleh//zwquew, ,vhg 9qu4ctric field 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 isqhuh9wq //gw 4ev,u ,z 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 suft4sma7 -.u 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 voltage.- fatu smu74s 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 of 12 V, it wt(,kgn rvj.ccnnw m2p9wn59jr9 3 1poill acquire a kinetic energy (i 93n n kcr5pmj cg,p9wtw(jo1.2r9nnvn 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 distance o t6o5n0ji/a 5b4 bjatgf $5.0 \times 10^{-10} \; m$ 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 o(-b yae9xav0vl ,n,(/- e*ykd ;nals)yu efoif a meter stick. Find the electrical potential for the center of yfua noe*,v/;ldya0by,vs(a)en 9(-l xie -kthe 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((fsz5gx wyi- ). If the potential is taken to be zero at infinity, what is the electric pwx gs(z5(-ify otential 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) andl /eju 1dj0o,c)scq0i a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, wha cel,1dc0 /jo) qusi0jt 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 -2.0-nC charge is at (3.0 m, 0). If :-4( 8ybt mpmw gn4jnpo on4k-the potential is taken to be zero at infinity, what is the g4-p4(mnb nnwp4 km-o8tyoj: 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 corn xjh0c:5 wq6vters of a rectangle of sides a and b. W50: tcqwjh6vxhat 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 +4.( nzr xigi+)2i0 mC are placed in two diagonally opposite corners. In the other tw) ig+x2ir( nizo 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 (charge8v-j uz)q(hm6zw-w rb +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 t1a6et5fkl eadu4q*+ mC, at the cornerdkuatle ae 6t 51+*f4qs of an equilateral 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 oni f +z7ov+u -feal8+7ht 5qhuy the plates of a 2.0-mF capacitor when it is charged to 100 V?7huzqv 7+ -f 5u8o+lf ietyh+a

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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 platet epy.t2e4hd3wd k/ s;5rlf 4alagt*:s 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, hcn 2mr6me4f.and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the ph4 f6 mc2.ermnlate 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 ookg/ p8uv51zza pi44v f 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 eb0a. t6mea* md2k1lu potential difference between the plates is 2000 V, with the top plate at the higher potential, what is thmukl61da2m e.b0*aet e 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 acrosskc4 dz-uz +be2 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 remained connected during th24 duzzeb+-k ce 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. H q:,ssy y//b-b;dgqn pow much energy is stored in theg bd;-q/qysb:s, np /y 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 mF capacithj:sb)1 heu3s or. What is the energy stored in the capacit3j ueh:b) 1shsor?

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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 osl v rac3*ck:(.vrkf)8ku9ks f a capacitor when it is connected to a 12.0-V bak9fr* ku:83skv k .acc)rsvl( ttery. 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 s+tc ;blvco *f 89mqtc7tores $2.0 \times 10^{-3} \; J$ 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 -v5 y-y5c 2n.gjbpvhrplates 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 co e0sytx954myc( wdwe.-to qk)nsists 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 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 of area3l(z *:an6 r41t;v wigbkfto *ffnm* a $1.5 \times 10^{-4} \; m^{2}$ 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 const5 hkk:8buna6 qructed 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 g bmg 7r8xlwuo 104fw-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 connecy;mdj/:t yurjp .,i*o ted to 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 capacytrpd m*i/ u,:oy.jj;itance 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 fu7 ,uxz .bd-isllqy)( 6pd:kh h8ts7qvlly charged. The battery is removed and a slab of dielectric that completely6 i8xhuq(. 7yhd-7psl vdzksq) l,t:b 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 inserted?

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