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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 shk9.lotg1 3e5lz ar8 ejown, 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 thrj 8o. a ee3kz915lrlgtough 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________sea-+dk f h u33hf-y:t_each resistor is the hfauf-h- y: +d3skte3 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 through the thin filament wire of a lightbuybyv .: vgnhmbi725a .lb causes the filament to become white hot, while the larger wires connected to the lightbulby2imvg7 a y.n5: .hvbb 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 areqo,e-m k5 t*y 21jwqg uo:cd-w being replaced with LEDs. LED is the acronym for which one of theq w-*myq:cw,2gd k oot1e -5uj 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-slo ,eq 57*/dt9g6rnnmvv z6mvectional area A. *m qdv nolvrv6ne/5z6tmg7,9 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 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 wir1 kt+khckxx75p y8 a,muta,bzcq8*n(e II are made of the same material. Wire II has twice the diameter and twice thmhk(na,q,t8*1 kzu 85xyc7+xacbp tke 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 butm1 *e:7l bt8z5acsf:d lfcbb2 has twice the diameter and half the length of wire X. If wire X has a resista bcfzb *eam:df 71cl8l:52sbt nce 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 materialf bq5hu w9apv4))i /4tlj. xn ea67jgy is then drawn so that it is a cylinder with new lenb/9 pwq ))j7 6y45gj4axa.e th iuvflngth 2L. What happens to the 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 brighter light bulb. He decisqmhz-dc;8 *d des to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce mod *z -cqmhs8;dre 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. The lengtxc+kt2j;*t r ah and radius o+caxtrjt* ;2k f 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 azrym8+mm6o-8 y ww-oj battery in the following way: “Two resi m -myr-mjwo 8+8ozw6ystors are connected in 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 accompanying circuit diagram h d kmp6c-u: bvnq.0* th)3evjp(ha zyq+;sjj- as internal resistance 10.0 kW and the ammeter has internal reqs:+ n- jjzpp mhakdbh-v0;c.6uje3yvqt *)( sistance 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 compoundb vii0tsl+)rn65wlm8k e m) f. circuit shown to the right. The three bulbs 1, 2, and 3 - represented as iv. r)+ll e8inmtb kwm65sf )0resistors in the 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 electrical circuit at the right. Ifrkfu453q 0ozu,q ,cfg the current in all three resistors is equal, which of the following statements must u3o,rufkgq,z 5cfq04 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 comp6 p k 3rvks:ccowi0(r,osed of 5 identical light bulbs and 2 flashlighop3w06i( ,krccv:skr t 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 concerning the simple qekxd4-v 6 ;h2u7f oyqcircuit shown where resistors R12ovy4q6dkx-e 7; uhfq, 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 connected in series to a battery;3m5 cnc nbfog7h14ir. Bulb X is brighter than bulb Y. Assume all circuit element 45ogbc n fhnr1;37mcis are ideal. If bulbs X andY are connected in parallel with each other to the same 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 the kh216 ylsq 4mmidentified resistor in 5 seconds once the circuit wmmh qys4l 21k6as 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 circa.92hoxwht6xs- hz g3 uit have the same resistance, which wou9wg x 6hzs.3htx-a2oh ld 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 accomps b8rhfogp;t)kz.-5 b anying circuit diagram, the current through the 6.0 Ω resistor is 1bbs- .rg)5 p oh8zkt;f.0 A. What is the 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 Rv q-f s-4cr63q wgy;ae3 are connected in series to a battery. Suppose R1 carries a-;fv re4gwq36- asycq current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 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 differe v3hk uftuu857w a0ov4nt resistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it,wv5ouua k f0uv3748 ht R2 = 4Ω, and R3 dissipates 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 120o nq4 pvjq0b.20 watts and 120 volts. What is the maximum value of the currentj2v qp bnq0o.4 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 60 watt lightbulb c/n 0nxpq0rp c/ezkzy t2jwp 6n)4 0w5designed to operate at 120 vol4 cwz kj /czn/p2e)t0y0r5xn n6wpqp0ts?

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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 flojh)1;w,t)vot5j nat4do wuk8ws through a 4 ohm resistor that is dissipating 36 watts o5h t)odta k;wu4j nt)w8jo1v, f 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 mado(nef09b g9h .2j74tn i .jfp zhq6ezrked "120 volt, 600 watt.” In normal use, the current in ij zbhj0 htffeq g 2n.en.dz9(o9 i7p46t 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 resista;)n +/ tihvk7( *ultbbknco5 xnces could NOT be produced by a circuit containinn bibkv7;un(lhkc/ to*)t5 +xg 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 resistor2a g/kcss,,n y9iolp2 s. Which of the following equivalent resistances Clok9a, ,nsisp /yg 2c2ANNOT 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 value llz 3cw6 o qyrc-+/3fw d0peq-mn(fe+s can be connected together in different configcww-cyq6p rd-e+mlozfeq+33f 0n l/ (urations. 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 rea0o 1jv ;b) w9fq fl.g9,ecspek;n3dfsistor is connected 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)dsqw3,1 e9focp0b 9a fk ;njge. vl;f 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 resistan4o)xa .qkw9i taec t),ce R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω .)t4ka ac9xiqw.t oe, ) 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 ia s0s)+3m 8)jzrp i0von2kx l)neh mh1t has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it woupvk0ma shem0xishn+l n2oz)1 j) 3 r)8ld 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 tzldsn usj19- co bs1d4lke2 y8(+i c.ehat is dissipating 36 watts o2n - d1ds.+clkzcl 9is4su oj(e8ybe1 f 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 c6g2f(4 drbur l a9b*i/nzu e;qonnected to 120 volts. If the price of e269qzb ;ud arl *rgne(4fbu/ilectricity 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 -n5:dpbw2jg1nvd( x c cost to keep a 100W lightbulb lit continuously for 1 year atnjd- 1dxnvp(5 c:gw2 b 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 current of 4.00 A through a5hmsxz jsesn;-bb ,s:h-+f 0a lightbulb results in a power of 24.0 W associatjb0n sa5sxh sfmb+-:,;z- esh ed with the bulb. Which 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 (u ildlce: y2-s2uy:mof six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the maximum number of the computers can be operatiuu:edslim y(22-:ly c ng 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 resistors to form bxo53;2o3* lftdd dwp:h3mcpa simple circuit as shown to the 3p o d3l d5c:2d*xwh;3ptbfomright.
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 i qyj et 2z hbmu+-x00:o34pcokrm1r4 xs connected to four resistors to form a simple circuit as shown to thexroy4u3-o tjemh q 2p+:czrmxb004 k1 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 switch and three re-tdq kvl:4 ya2sistors are conn4l-qvtakd2 y :ected as shown. With 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 ammeter, a switch and iwt/n : ;wbariwe7;+)1cwn xmthree resistors are connected as shown.nerm1;wtx cii);aww/: n + 7bw With the 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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42#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

02.23: An ideal battery *l 2,eln44vs+ pihu;yqx0eup, an ideal ammeter, a switch and three resistors are connected as shown. With th,xni s+ eqheu42p4l*pu 0vl;ye 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 circul,w 3i txifvm6r *z3 /mr)kp*qit shown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identica)m f3 kptrx 6w3/,i*izqml *rvl 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 rme- rwl htc2 io,/-91le;liu 3pi;kbwight with resistanbui; lt1,khw i3;lr9m--/2cle pow eices $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ 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 0w jqp nci:a-j59a57 j( de;zfvdwy1dresistors connected in a combination series and parallel circuit to a voltage sojyddv-0c 1 zfq5:7d9jwjaa (i5e;wnpurce.
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 fiv . tgsmfbs(f+0d6jue kjnq377 e identical resistors connected in a combination series and parallel circuit to a voltage kmjf3jqte b0s+gu67d . f7s(n 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,pw r(b;/h;q hft5a. ye all of the bulbs are identical. Which bulb will be feq.yh/; abp5; t(hwr the brightest?

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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 swizlw,5d/j1a ek tch and three resistors are connected as shownwzkja5ed /1 l,. With 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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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 three resistors are conla x e9qma4:ra8er.;u :) zkvenected as shown. With the swiq).:l4ream9u 8re :aka;z evxtch 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 id*hhkgfx y eu22h4 )f snu8w,p-eal ammeter, a switch and three resistors are connected as shh knus-fw82f 2)eh p xh4gy,u*own. 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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总分:50分及格:30分时间:不限时

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