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?作业考试练习?美国物理杯赛(Physics Bowl)?.Resistor.

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习题练习：.Resistor.

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作者: admin 发布日期: 2024-08-22 15:34 总分: 50分得分: _____________

答题人: 游客未登录开始时间: 24年08月22日 11:12 切换到: 整卷模式

1#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

16.09: In the circuit shown, an electric curzs9 utywcxu0or*9(7 srent exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the dir0u9ts*(osuwc r9 zx7y ection of the electric field through the interior of the resistor?

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

98.06: When any four resistorstd1 um ee.d7wk t,fm), are connected in parallel, the_________each resistor idfk). emt1 udm,7, wets the same.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.33: A current throu,:yk5kro9/wnqq0l g q gh the thin filament wire of a lightbulb causes the filament to become whkwl :g5,9qn krqqyo0/ite hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

A. the larger connecting wires have more resistance than the filament.

B. the thin filament has more resistance than the larger connecting wires.

C. the filament wire is not insulated.

D. the current in the filament is greater than that through the connecting wires.

E. the current in the filament is less than that through the connecting wires.

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

13.08: Some standard household lights are being replaced with LEDs. LED -( lt cgrlpz14is the acronym for which one or4z-1tp c(gll f the following choices?

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5#

多选题 ( 1.0 分) 切至整卷模式搜藏此题

05.16: A cylindrical graphite resistor has length L and cross x7mtt*jl*2 qv-sectional area A. It is to be placed into a circuit, but it first must be cut in half so that the new length is 1/2 L. What is 2lvxjt*tmq 7 *the ratio of the new resistivity to the old resistivity of the cylindrical resistor?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

98.20: Wire I and wire )8rc sbmbx --t3wqrwl7v r/rb* mx*+ pII are made of the same material. Wire II has twice the diameter and 8rb b-*3m) -qwc *x7+m/vspbtrlr xwrtwice the length of I. If I has resistance R, II has resistance

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.31: Wire Y is made of the same material but has twice the diameter and kb86b;(pvdzq half the length of wire X. 6 bpdqzb 8v;k(If wire X has a resistance of R then wire Y would have a resistance of

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.23: A cylindrical resistor has lengelz;s gs32 g(wv bi*d:th L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of(es i3lg2;wdvg *sz b: this material because of this process?

A. the resistance is quartered.

B. the resistance is halved.

C. the resistance is unchanged.

D. the resistance is doubled.

E. the resistance is quadrupled.

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

07.27: A junior Thomas Edison wants to make a brighter light bulb. /cpnvn ohy-:dg23 yk 8He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a y3h dngc n:2y8v-ko /pgiven voltage?

A. Increase the resistivity only.

B. Increase the diameter only.

C. Decrease the diameter only.

D. Decrease the diameter and increase the resistivity.

E. Increase the length only.

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

16.07: Three cylindrical resistors are made of the same material. The length an0gg: w/1idui sd r 1idi:gu/ 0swgadius of each resistor is:
Resistor 1: Length L, radius r
Resistor 2: Length L/2,radius r/2
Resistor 3: Length L/4,radius r/2
Which one of the following choices correctly ranks the resistance of these resistors (R1,R2,R3)?

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

13.22: Four resistors, each of resistance R, are cozobi4 1y/ v4g)s s-5clmvw0uiz2nt d;l9b/hznnected to a battery in the following way: “Two resistors are connected 245 n/ l bvco9m-; ziy s zldh4ibsgwtz)0v1/uin series. This combination of two resistors is connected in parallel to a third resistor. This set of three resistors is connected in series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.35: The voltmeter in the achv(+sw;g m k: ,.kdzw,vdf -gpcompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.v+: ;(fggv dpswhmw-zk.,k,d 0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.37: Consider the compound circuit shown to de)inaw e .5u+48 gwxsthe right. The three bulbs 1, 2, and 3 - represented as resistors in the d x s)w un8+i.gaw45eediagram
- are identical. Which of the following statements are true?
I. Bulb 3 is brighter than bulb 1 or 2.
II. Bulb 3 has more current passing through it than bulb 1 or 2.
III. Bulb 3 has a greater voltage drop across it than bulb 1 or 2.

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.30: Given the simple r:av7yfacz.zy . ;qf,*jb r3lelectrical circuit at the right. If the current in all three resistors is equal, which of the following statements mus. ,3 ylffr7.a:vzrb*jz acyq; t be true?

A. $X, Y, $and $Z$all have equal resistance

B. $X$ and$Y$ have equal resistance

C. $X$ and$Y$ added together have the same resistance as $Z$

D. $X$ and$Y$ each have more resistance than $Z$

E. none of the above must be true

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.37: The diagram at right represee2irqm6l p gech f3z*k2-y 6sw(:gj(ynts a simple electric circuit composed of 5 identical light bulbs and 2 flashls*3fkelyj(6: q2 cegmw (-zgr2pyh6i ight cells. Which bulb (or bulbs)
would you expect to be the brightest?

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16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

00.03: Which of the following sh.3tlgv 2y4j z rfa./)vtow4 statements is NOT true concerning the simple circuit shown where resistors vr3h)aoz. 2sl4yt vf/gw4t.jR1, R2 and R3 are have equal resistances?

A. the largest current will pass through R1

B. the voltage across R2 is 5 volts

C. the power dissipated in R3 could be 10 watts

D. if R2 were to burnout, current would still flow through both R1 and R3

E. the net resistance of the circuit is less than R1

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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.29: Two lightbulbs X andY bx .aeq)bqz wn 58q+pt/),3bt lev h4care connected in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with each other to the same bx.b)len)3,bt8vhe +qqz5 4p/btqacw attery, which one of the following choices best represents what is observed?

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18#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.34: How many coulombs will pass through the identi66v1brczmh y (fied resistor in 5 seconds once thhvy bcr6mz(16e circuit was closed?

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19#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

00.23: If all of the resistors in the following sxrw/ 2 u)kkgfnb9)r-qimple circuit have the same resistance, which would dissipate the greates) 9/rwxk urk2bgfn)-qt power?

A. resistor A

B. resistor B

C. resistor C

D. resistor D

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20#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

98.34: In the accompanying circuit d5es pm3omlc 7a* iaxxd:,-ef) iagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supp pcfx od)a3s5,- lmme7*: exialy voltage V?

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21#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.27: Three resistors R1, R2, and R3 are connected in series to a bate8lvt;ju.6n:x(om fevg 5 s.n tery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the vs5( 8n ;vvouengt6mj:fl.x. e oltage across R3?

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22#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.40: Three different resistors R1, R2 andR3 are connected in parallel to a bd75 feq l*w0appr(xi-attery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipate0x - d7pa(5 *irfpqlews 6 W. What is the current in R3?

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23#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.13: A heating coil is rated 1200 watts and 120 vo3n (mw83 unis yu5g7nalts. What is the maximum value of the current ai3mu7y8gsu3nn w(5n under these conditions?

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24#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.23: What is the resistance of a9pfm1gsxxxgk;-h g9 t;7, 2u(rx i wpw 60 watt lightbulb designed to operate at 120 volts?gx ,7xpxh;wwgs r1t ;p 2-u m9gx(fik9

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25#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.09: How much current flows through a 4 ohm resistor that iqk-p*vn0/ w6o i u,mbts dissipating 36 watts of po-0q/w 6bi*u knvtpom, wer?

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26#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.21: A household iron used to press clothes is marked "120 voln2fcw z*z *f/t6*mz rwt, 600 watt.” In normal use, the current in it *2rt*/w fz c nmz*6wfzis

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27#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.05: Which of the following resistances could NOT be produced by a circuit conqh * ybzs ex(w8u 5nhn:l--,lxtaini-w5lu:nhyeqlnx bs xz(,h*8-ng only three identical 6Ω resistors?

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28#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

94.37: You are given three 1.0 Ω resistors. Which of the following equiva.ebkcjvj/ -x2 .op7a-1as fkn) (alivlent resistane.kbl j27npx kf(1cosvavaa./j- ) i-ces CANNOT be produced using all three resistors?

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29#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.06: Three resistors of different values can be connected together inriw:r wwka +.) different configurations. If all three resistors are i. r :+akww)rwused in a circuit, how many different values of total resistance can be produced?

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30#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.35: When a single resistor is connected to a battery, a,b;ioyqd wi 06*yp3 ow total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in series using the3yiw by*wo60;i,p qod same battery? Assume the internal resistance of the battery is zero.

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31#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.16: When two resistors, having resistance R1 and R2, are connected in wa ;jwmnv;u7: parallel, the equivalent resistance of the combination is :mwavn uw;7j; 5Ω . Which of the following statements about the resistances is correct?

A. Both R1 and R2 are greater than 5Ω .

B. Both R1 and R2 are equal to 5Ω .

C. Both R1 and R2 are less than 5Ω .

D. The sum of R1 and R2 is 5Ω .

E. One of the resistances is greater than 5 W, one of the resistances is less than 5 W.

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32#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.46: A hotplate is designed such that it has a re,,g0(uepr p;qgw 0j/1fvwe u lsistance of 12Ω when operating at 120 volts. What is the minimum amount of time that ,pe,f0;uug g/ pqjv r10el (wwit would take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

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33#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.09: How much current flows through a 4 ohm resistor th6 thhh ah-wo+4at is dissipating 36 watts of 6awo+hth4h- h power?

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34#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.24: An electric heateronu*p w:)8gcyvnk58a draws 13 amperes of current when connected to 120 volts. If thea nypv o5c8u8 ng*:kw) price of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

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35#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.05 Approximately how muc gng 0(:t,rpyeh would it cost to keep a 100W lightbulb lit continuously for 1 yegp:en0 , y(gtrar at a rate of $0.10/(kW.hr) ?

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36#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.09: A constant curre4.)fc zd3 9 xey4h0*jat,wt: diuzqs xnt of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. W)axzwduzc4 :yesi tf4h.t*jq 39, xd0hich one of the following choices best represents the resistance of the lightbulb?

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37#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.10: Each member of a family oh htynb, r9o nno.1u6-f six owns a computer rated at 500 watts in a 120 V circuit. If all comput6 . rt ,19unhnnoybo-hers are plugged into a single circuit protected by a 20 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

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38#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.16: A 9-volt battery is connected to four rubr)3lt ,uybz:h7 gs )esistors to form a simple circuit as shown to t zh3lgsy ubbr ):t7,u)he right.
How would the current through the 2 ohm resistor compare to the current through the 4 ohm resistor?

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39#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

03.17: A 9-volt battery is connected to four resistors rl-;tg f60sd 2pa2d1)5eut zsobplg ,to form a simple circuit as shown to u5z rl6ge;f0tsdobt pgs p221 al,)-dthe right.
What would be the potential at point B with respect to point C in the above circuit?

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40#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.21: An ideal battery, an ideal ammeter, a swi6s )f fqp9sx41*nmuqmtch and three resistors are connected as shown. With the switch open a )xfsumn 9q1qfms4*p6s shown in the diagram the ammeter reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

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41#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.22: An ideal battery, an ideat zgxax2e8s:se, 9gd4l ammeter, a switch and three resistors are connected as shown. With the switch d tez a9xsgx eg:842,sopen as shown in the diagram the ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

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42#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.23: An ideal battery, an ideal ammeter, a switch andm1vie(2;ygrejvzn:-o1x gc/ three resistors are connyx/m(je;c env 1v-1 2z :ogirgected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?

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43#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.14: For the circuit shown to the rir1g3, iima.+n mwtzp)ght, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resis )m iwn1a.tpr+3mzi g,tance R.

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44#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

09.07: The equivalent resistance of the circuit shown to he/aod 9c5g(lw(s pf; the right with resistancew9 ;f(pos( leh/ adcg5s $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

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45#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.20: The diagram be t(, jznuitp5+low shows five identical resistors connected in a combination series at( 5nj,ztiu+pnd parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

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46#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.21: The diagram below shows five identical resistors vnc*)iv 0o)s ljnvib+p l r0otx8;7g1connected in a combination ser oib8* 7ov+ xnilt;v sp0)n0 l1jgcr)vies and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

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47#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

07.29: In the circuit diagram, all of the bulbs are identical. zpytp h5b5x-doa1f)b s2,2 pnWhich bulb will be the bri)fhob zy2 sbt -pp5,d52anpx1ghtest?

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48#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.21: An ideal battergt+v m21e +ouvy, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads mv+2 vgtou 1+e2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

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49#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.22: An ideal battery, an idealu /l. rtg9us5h ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammrtl./gs hu5u 9eter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

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50#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.23: An ideal battery, an ideal ammeter, a switch and three resistors are connc2ss l rk8g y;v)+:bn2rsts2rected as shown. With the switch open asl;n:cv r) 8 2 srgk22rsbytss+ shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?

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