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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 shownncrl6 /tuo)/ b*i insb zj;0e2, an electric current 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 direction of the electric field through the interior 6 so)*2iu/b 0 tz/jclbri;nneof 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 connecteds v sf8 5x0szyyo,sleb)a9l76 in parallel, the_________each resistor is the samys lzasyb65xs7)8 o,l9ev sf 0e.

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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 thinafqu x. ej.-m6 filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cool-f6e.qjaxm .uer. 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 a40y.mpkr6+nlcoic6 g re being replaced with LEDs. LED is the acronym for which one of the following klo c 4+pryim0n6cg6. 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 5t36 cft,o 80irdsx6ofh pus.and cross-sectional area A. It is to be placed into a circuit, but it first must be cut 653t.df0 sf ush8irt6x ,poco 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 thf5 07u3 msiotbe same material. Wire II has twice the diameter and twice the length of I. If I has r tufs mibo7350esistance 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 cp p/ g(7)5 su24*:whohdjat0vdpiob but has twice the diameter and half the length of wibouhhpg7 /p c j*od50w(i s: at)dv24pre X. 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 length L and radius r. This piece of mathg3mavzu3h.9 x c7xc eo6m9 .*z 2agvderial is then drawn so that it is a cylinder with new length 2L. What happens to thcgdz 7x6 v9o9 zmvacx.gmau3h *.he23e resistance of 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 brighte*n u eww/nvn:*qym23t r light bulb. He decides to modify the filament. How shouytnv:e *2w3qmuw/n*n ld the filament of a lightbulb be modified in order to make the lightbulb produce 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 samuk obw hi (:cqb -+je61+nvt(x3 0tbrxe material. The length and rthb1ti-+ ( ejkou6 :cbv30xnbq( w+xradius 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 connected to a battery7q-wx3zn5f wi(l yg1 o in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a third resistor. This set of three resistors is connected x go5q17iyz-l3wfnw (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 ini++6 u )t 3kdf6 9jjreqo2mejhternal resistance 10.0 kW and the ammeter hdmhj+ fqej +e9ru23 k)6t6 jioas internal resistance 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 rig)xi)gt o f4st37sifqj6* lt0t ht. The three bulbs 1, 2, and 3 - represented as resistors in thej txf*)7ts l t4o qg03)f6siit 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 simplely :yh.7yq6mg electrical circuit at the right. If the current in all three resistors ilym hy67 :y.gqs 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 represents a simple electric circuit composed of -65va caqw gl)5 identical light bulbs and 2 a6g wqcv)-a5 lflashlight 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 statements is NOT true conceakgprh-x;5p6 rning the simple circuit shown where resistors R1, R2 and R3 are have equar;5 -6 pphakxgl 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 connected in series to0hwyw*gyq -u9 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 s-w qg*9uy w0hyame battery, 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 tvq aem2 z,qc4)x6lo i9he identified resistor in 5 seconds once the circuit wa z)l9oxm24v 6icqeq ,as 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 simple circuit have the qky my-)12b* fcg) idksame resistaqky-yk1dimg2 fc*) b) nce, which would dissipate the greatest 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,qby; k qvafy;a20 31ok the current through the 6.0 Ω resistor is 1.0 A. What is the power sup23kbka0 yyfa;;qqv o1ply 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 art1d:am7ifwoze.c d/ .e connected in series to a battery. 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 voltage acrosdoiafd1 7z .t.e/ mwc:s 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)b uq-+wyf:cr xe*hn2 battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 whebx) 2:r - ncu+*fqyW. 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 pq2c3uf oc7s rh/( nv:rated 1200 watts and 120 volts. What is the maximum v o3:spn q2(uc/rvc fh7alue of the current 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 a 6zg/.kum 4 y4z,v.tfdm0 watt lightbulb designed to operate at 120 zz, d/t4 .umm4yvg.fkvolts?

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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 resistonqq-afv3 w:+ tr that is dissipating 36 watts ova-w qf3: tq+nf 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 iron1x ax(mo-xo a,rt5) au used to press clothes is marked "120 volt, 600 watt.” In normal use, the current in),5auooa r-xx( ax1tm 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 NOT be produced b(0ltw*8icd xuy a circuit containing only three identicaudl(c *0i x8twl 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 a*l6r73q f eor;pu3gt Ω resistors. Which of the following equivalent resistances CANNOT be produced using allqofr*7 ;e a gtl3pr3u6 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 cojr(e nt w-y7 ge8u*qnsxsm.8(ci+8fd nnected together in different confij f 8(r 8dux*snc8sw7t egnm.eq(yi+ -gurations. If all three resistors are used 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 ,tyuxz;sz5xk+1 w pl2tmr,5sto a battery, a total power P is dissipated in the circuit. How much total power is dismz; k 55st,z1trp,lxyw2+x su sipated in a circuit if n identical resistors are connected in series using the 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 paral6 13.jpmqrtai lel, the equivalent resistance of the combination is 5Ω . Wh13. ipt6qma rjich 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 su3 gbay) q zucc6fxk 7tg-u53q*ch that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it g)-q36y3utf5*c gb xk7qzua cwould 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 resir8;lgl oc ,;lustor that is dissipating 36 wattu l r;8lcglo,;s of 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 current when connected to 120 nk: am(f0prq2 volts. If the price of electricipqa0k m2(nf :rty 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 wqjxy: .37/f9gvy(sptpatykb 73 r2fsould it cost to keep a 100W lightbulb lit continuously for 1 year at a rate ot yrb(qgav3 27f/73.sp :ypkyxj9f stf $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 thrw+jsc5ve c+ l1ough a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents ljecv 5 csw++1the 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 watsk,k/ pq n/u hi;zw.6/pvt8 hd- q)mmvts in a 120 V circuit. If all computers are plugged in /m/vv . q;k)86zdsppm hqt,/-nuk whito 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 fou- *cmo v+py0:afga ra3r resistors to form a simple circuit as shown to the righ3fa rmpvy *c0ag :o+a-t.
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 to form cl+-u6.7acbwtot)b s k 1i: dfa simple circuit ti )t f:7 kb1sc-ldou6w.a+ cbas shown to the 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,1jsdd9,e 5 7nfd4gemw a switch and three resistors are connected as shown. With the sw5j9se1 4nmd f7dedg w,itch 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 ammeter, a switch;uy;k pda 9tc, and three resistors are connected as shown. With the switcck;dp ,9;auyt h open 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 and three resistors pt:zien8 k /y7a(; fbtz.r*wa are connected as shown. With the switch open as shown in the dia ; t(prit 8znwk:/*f .zby7eaagram 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 rizm.,v)br+6 qk83q mo0y 7dl j zl)ebdught, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistanckzy m0o6 d3u 7bqj.db+,l e)q8lmv)zr 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 resistance of the circuit shown to the right withhk5p s*;tis;:x q ;nr.) e;wa na+wycu resista)5e;; w+ :isk a;puntwq arsxyn*;.chnces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ 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 bhell9 ikn up960+l wjw+-s*q xelow shows five identical resistors connected in a combination series and paralkwwel+ql 0u+6 npi 9* -h9xsjllel 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 connect uy egqi/3 9u(+n+3bordt.snab8ix b-ed in a combination seri/inuib 9x bsn yaodb(g+r e.833ut+ -qes 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 bulb7adq*0zt 7fnws are identical. Which bulb will be the brightest?* 7a7dt zqwnf0

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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 switch and three resistors ar) v,c/j qybsg4e connected as shown. With the switch open as shown in the diagram the /)cj y4,gsqvbammeter 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 ammm6a- hqf9kh6zlf2r 3 jeter, a switch and three resistors are connected as shown. With the 26fj -r96l3hqk zamhf switch open 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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50#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.23: An ideal battery, an 7i n .cxribi(j/as34a;8rxrf ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown i8if;xrna/rr cb3x( .jsa4 ii 7n 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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