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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 current exists in the metal resis ch*w5yq hhn(ryc;c v/d4*s f5tor connected to the battery. Which one of the following choices best describ(c chyc /n*; *yhvsr4d5f hwq5es the direction of electron flow through the resistor and the direction 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 resistors are connected in parallel, the_ +dh+-iag7 *)nn2lyndzy8h cq________each resistor is the sah+gqylh+n*2 zn-dnai7cyd ) 8me.

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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 through the thin filament wire of a lightbulb cau+jlbf /;(lof qses the filament to bfqof(lbj +/l ;ecome white 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.3qrsmu*0f8a yzust h1x88 sb7 LED is the acronym for1mu83 tfh8qyus7z8 0sr x*bs a which one of 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-29zw,n t ejz:rwz8-hm yy+ik5 sectional area A. It is to be placed into a circuit, but iwhr8yz, imk+25zn 9ejtw:y-z t first must be cut in half so that the new length is 1/2 L. What is 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 II are made of the sammzo7r t n9r0o3e material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II haorm7rt39 zo 0ns 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 diameterlvu:et/y,(3x+x g ah x and half the length of wire X. If wire X has a resistance of R then wire Y would have a re +xvyx lxa,3t/:u hge(sistance 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 length L and radius r. This piece of materialita,9p em7 qh8 is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material because of pem9ih,t8 7 qathis 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 li4gc5)/q94gsc o akk1 ;rbweqpght bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb ck4e; b g5/1k4 csq )po9waqrgproduce more light at a given 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. mb(p loyjl9q+ fd0y.a03w6oe The length and radius of each resistor imayjbe0 l0d+qpwf 3o(yo6. 9ls:
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, arep(mwsfxjr h 4spj7;.3 connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a t7p.m3wxjpshj (rf s4;hird 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 accompanying circuit diagram has f) wl * d1dmt,e1tq7p*d;rsus xne2+sinternal resistance 10.0 kW and the ammeter has internal r,snf+qxd*s 1r l*msp2euw7d d1te;t)esistance 25.0 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 the right. The thrx;oe) 9tvnj cm5c:i+ *hjor4d ee bulbs 1, 2, and 3 - represented as resistors in thcc ed5ov)r : +9jnoxhi*jt4;m e diagram
- 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 electy84(blz (zp edrical circuit at the right. If the current in all t p8byezl( z(4dhree resistors is equal, which of the following statements must 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/ 8h-lg6 -shfwtt;zxp represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Wswxgl -t-th z;h8f6/p hich 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 statements is NOT true concerning the simple coian3d p cej*o2 n5g5 q7s0(bwircuit shown where g0 wo(5b 7 acnd2e53iojnp s*qresistors R1, 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 are conne9oet a a/ gex)9qr)t8pcted 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 battery, which one of the following choices bes ae/eo)at8qt rpg9)9xt 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 iw4eadcqsn fi+o:v1z.uom 89- cgy/b1 dentified resistor in 5necua/+ymq-gfb9dois 1z .:1 cv w4 8o seconds once the 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 +qyllve xp-j0/*hij) simple circuit have the same resistance, which would dissipate the great/ pi l )l*jjq0v+ehx-yest 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 diagram, the current t/ni- jyrrs.+nnn+by3 hrough the 6.0 Ω resistor is 1.0 A. What is tyrn +byjnsi+n3nr-/ .he power supply 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 3o 4*(clgbxapto a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0oc l x*p(34gab W of power. What is the voltage 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 resis6;vx r*ea*i jmtors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is e*im6xa; v*rj 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 raten9oktd rcj,q ldj;itgx5 5:6. d 1200 watts and 120 volts. What is the maximum value of the current under 9oqk td;c g.x5jn:l6ij,drt5 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 a 60 watt lightbulb designed to operate at 1st(uj((p fax 2 wf/yx420 vof/ axws p(uf(y( jt2x4lts?

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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 oh0 lteky1*2dazm resistor that is dissipating 36 wa0dalet2z*y 1k tts of power?

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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 "14 v1g: ame(kbkl mv/h;s/v:yn 20 volt, 600 watt.” In kshy1//bav:;lmekv v4n g(:mnormal use, the current in it is

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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 Nr m.oa)/5j/t8t,k.gejin7 : zfkeoc nOT be produced by a circuit containing only th /8tj.tkon ae : f.5)rgc,k7jez/moniree 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 residv:9tukz+/w,ii7 wv2g pgy p-s5 ( cjpstors. Which of the following equivalent resistances C2is5itkp g -(cdg:v7wpzw/ j9 yu v+,pANNOT 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 ;y0nj sd,n7xhdifferent values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistanchj ;,sd7nynx0e 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 connex a 1tmg* m78q+ue2fifcted to a battery, a 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 the same battery? Assume the internal resistance of the battery is zero.*ft7am1q8 g+ei 2muf x

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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 resistag8m9r m:j igj(nce R1 and R2, are connected in parallel, the equivalent resistance of the cm8rm9: j(jggiombination is 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 desiv.kzxm mea-hd7*i3 lc so(y)0gned such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warhzo(v0ydl m xm3) c7i.sa -k*em 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 that is dissipaunyfej-n.l7 vdg bw(h3nk ,* (ting 36 watts ofyn(ln-(3 ueg kd7wj,bf*n v.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 heater draws 13 amperes of cur,oipc6+. w bidrent when connected to 120 volts. If thiwob d6,p+ c.ie 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 much would it cbmnk;d(sj nz tr0ox1zr23* fd 6fr/9h ost to keep a 100W lightbulb lit continuously for 1 year at a rate of 0m ( 961;rht/n zrodkx3n rz2bj*fsfd$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 current of 4.00 A through a lightbulb re4slkrbjmr(8 +s3 4yff sults in a power of 24.0 W associated with the bulb. Which one of the following choices best represents r4f3m8b yf+sr4j s(kl 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 of six owns a computer rated at 500 w08yixf r3f .w/jkx kqfa7e. +ratts in a 120 V circuit. If a+r.x k3 8er a07xiq.f /ffjwykll computers 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 toj:qp y o(m,gkz z,r e 1+gtq4/uko-hp. four resistors to form a simple circuit as shown to ,zo.g k(/ gyo hq,-e1p4turzpj+m: k qthe 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 r1tpib rz, (r6b1z* wuk+xfa0connected to four resistors to form a simple circuit as shown to z bk(atr pf11,0*r6 z b+wixruthe 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, gyu7 *c ha5z3n(mm.sg a switch and three resistors are connected as shown. W( *u73cs.mggna mzh5 yith the switch open as 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 ideal ammee d7*fh)73+waj);6 eqvagl1v sqkidwter, a switch and three resistors are connected as shown. With the switch open as shown in the q;d7v sgek3d1h)a6al*w +ewf)7vi qj 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, :u2b+q.( l gisiz)eke; ,css wan ideal ammeter, a switch and three resistors are connected w.sks;2s bcqez (:+u i,eli)gas 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 vnki-7 +atbt8 shown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistancab8 -+7ittvnk e, and all three resistors have identical resistance 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 resi 6tpau8mq-,zhoy/y( rstance of the circuit shown to the right with resistances/qpyza- yto6 m(h8u r, $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ 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 below shows five identical resistors connhow8 (m22q l f/p6yaonected in a combination series and parallel cino8l6ap /wy2f 2hmo q(rcuit 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 connecx vq1eb,d+v9+n y l3xated in a combination series and parallel circuit to a voltage yd q+x 1 a,vbx+39elnvsource.
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.hf7ilz 6 q80m go)f4nw Which bulb will be the 7 h) g fql46w0i8fzmnobrightest?

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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 battery, an ideal ammeter, a sw 6ag0/2rweozdt:5clb itch and three resistors are connected as shown. With the switch open as shown in thelaz/c 6 btw2o0r dg5:e 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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49#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.22: An ideal battery, an ideal ammeter, a switch and thrlg3r)49, p 0e9asijag evlr8aee resistors are connected as shown. With the switch open as shown in the d3llg 8e 9gaa9ajpvi,e0rr)4s iagram the ammeter 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 a :pwy*s)th,ai g +mb6kre connected as shown. With the switch open as s ymwtkgai+) b*ps, :6hhown 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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