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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 electr3s: wbq*ma 8 ozhic*ce36rf5p ic 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 q6b:fzh8rc5 cm* ew3ipaso3* 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_____ zr.qwnk cca pfs()0 1czms/04ytp61y ____each resist ymscsp. 4k 1ft c(zprqn01)0ayzw6/cor is 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 through the thin filament wire of a lightb84qabfe/1 kl yzqubo(kw+; dmr7*l -lulb causes the filament to become white hot, while the larger wires connected tobm yf+1le l*d7kq(oka u ;-zr 8wbq/l4 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 xgsh32 hr7. my7x(rklt0 )y ztLEDs. LED is the acron2lrsyh(ktr .x xm g03h7z)y7tym for 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 hasmr 2p;:q n1sf.n s6;bojha7qy length L and cross-sectional area A. It is to be placed into a circuit, p6nofb y.7r; aq:m2s1qshn;jbut 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 wire II are made of the same material. 0s .ys p,3(ig8+e,yyfq satjgWire II has twice the diameter and twice the length o ysyaj t.8fgs, +e3i0(g s,qypf 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 hascl 6hj/o eon;) twice the diameter and half the length of wire X. If wire X hasolo/; nh)6 ecj 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 ahdrgrz:- y l: 0pot)hr7y pz+kcal()nx/ h( 9has length 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 rzr)d)hlnpy:+ao zx r/tkga-:r lh py7c( h9 (0esistance 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 r:t hn6deh99bdecides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produ hh9ndbt9:er6 ce 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 mx2 kt6 5ua fnnw9,,9b*jyip pmade of the same material. The length and radius of ea ,pmnw u9 jtn52,6ybixf*k p9ach 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,eatb 0d4:a 0hl are connected to a battery in the following way: “Two resistors are connected in series. This combination of two 0da0 4:tbhlaeresistors 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 haecf uth,f9)bsfy-(wbn ccy3dd .f0 +.s internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The f0wcdub9,t3+.f(f . e-h)cbdf nyc sy 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.,x8 6dk*y qpxk b+)phl The three bulbs 1, 2, andqx,) b*ph+lk pk 86yxd 3 - represented as resistors 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 righio 1.ky jb:w.*oyjvw(t. If the current in all three resi j . oy*jobwvwki:y(1.stors 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 represents a fv kw 8kt38 w:*v5mv bn:fn5vwsimple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or5 5 k8w*vbvtnn ::k8vwwvfm3 f 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 simpi lid9a 75 dc:vjyn+o;le circuit shown where resistors R1, R2 and R3 are have ndjo ;cvdli+a i7:59yequal 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. Bulb X irq72aeyyydfusg l3/1n8i . ;,w o; vkps 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 ; oy ;uq3/f2k8.r,yp 7ay1ldw es vnigchoices 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 t40uza0rcfysqx h ;;r(he identified resistor in 5 seconds once the circuit w 0aruxsc;h4fyz(;q r 0as 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 thkg; /8n ya2,mbkc qfb0e following simple circuit have the same reky;fgkc mqan0 b2 /b8,sistance, 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, the cx kqa -9zis /ec5t9cj;urrent through the 6.0 Ω resistor is 1.0 A. What is95sc9/ct ;zxjqiak- e 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 R3 are connected in series tonhbi8 ,6t 6crsdu.u o: a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0:do, sbhr .nuut6 ci86 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 different0fyhk9hs4d/ 35 ypri j resistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 d/h0jsk5y dfhi3 y49r pissipates 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 volts. What is tex t3qm,ehiv;f;u*w 7he maximum value of the current under ,ufe; ihm q3w7ex;vt* 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 2ttr;wpus h0/ 21j, s(mdccnoaxqpx0-4a/iplightbulb designed to operate at 120 volt i/d/pctwjp ;o, x2sc 1aqm0sr0upnx h24(a- ts?

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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 thro9o4;jsqkxgky7k bps 70j( 3isugh a 4 ohm resistor that is dissipating 36 wat k3xsi7q jy0(k9;4gs7k jobspts 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 thnf5nygw0g vbi7:7 6 go press clothes is marked "120 volt, 600 watt.” In norma7:bwnv7i5f6 0gg ng hyl 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 NOT a *haj47bw/ trbe produced by a circuit containing only three identical 6Ω rwt4aa7h / r*bjesistors?

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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 resisti, 1.otl9ez3)konu dm7z n;z 1wtsj/mors. Which of the following equivalent resistances CANNOT be produced usikzzntm)7 3,t;e j1m.w9 z iuoln1d/song 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 v:enl;d1 v mms0alues can be connected together in different configurations. If all three resistors are used in nml 1; dvmse0: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 total po-o (n as4:skovwer P is dissipated in the circuit. How much total power os (n-ko:sa4vis 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.

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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/tmc zlx *(k9s resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistance(x*/mz kc9ts ls 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 t9szz*yh/jar4 a 8oi0it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warmr9tz/*s0iya8aoj 4 hz 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 dissipatif 8mu 1me,gril,;md5g ng 36 wae5gr8fm 1gm ; ,duli,mtts 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 19sg .fi /r,d:i5avxarz(- ppwo;r,k w 20 volts. If thep9v wd,zi./f ,rr:g wp 5s-oar k;(axi 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 cost to k n z fjca(:vjwxz98 xq;+80nukeep a 100W lightbulb lit continuously forxua:;(0zn+ 9nx zjjq f8vkc 8w 1 year 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 current of 4.00 A through a lightbulb results in a powereqbzv 6jp2 /h( of 24.0 W associated with the bulb. Which one of the following choices best represents the resistanc2bz6jp(hv qe/ e 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 fam4mtsn-)w0h-v / eluc0ze,xz.lhe8d mily of 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 zm /hnxe--mesdvz u.cw h804tl)e0,lmaximum 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 foueydj+ 2,e9jmrdko,ji:ux ,(w fbul:- r resistors to form a simple circuit as +dlj e x-, rm,dfb ,:y9 :iujewuoj2k(shown to the 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 to form a simpleq;(kg+ /06 oxhzcsp qp circuit as shohz( qopkc q+x gp6/0s;wn 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, a switch andtfyh3e5. jbk+ three resistors are connected as shown. With the switch open as shown in the diagram the ammetfbjk5+t. hy3eer 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 three resistors are conndqn2,u x*afv (ected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes an2,fqv*d( xu.
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 resistor8hz 3sng u7sd (my2fi*s are connected as shown. With the switch open as shown is zun3 (gyf7hd8im 2s*n 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 right, what is the e/xg 7zhypds beht6xg q::4+l (quivalent resistance? Assume that all wires are ideal, the battery has no internal resist:s 7/+ ex(6qyx4d:zhlthg gp bance, 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 resistanc ej eix*drzg-0q:y(w0e of the circuit shown to the right with resistance qrzyewge* x0:0-j di(s $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ 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 cpeoprnqf ,x /uol189, 1vzr- five identical resistors connected in a combination series and parallel circuorzpl,q91 o8 /p-n ,vfxce1ruit 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 connec*k7ptop / 4 ko/koh1tyted in a combination series and parallel circuit to a voltagh pkop74k* t oyt/k/o1e 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 bul *9 gfwyd-qf ph2v00susve6x)bs are identical. Which bulb willp ev*0ds9y0wv -f usxq6)g2hf be 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 switch and+*lob apu+d- 3,jte:amr j d( 8zfu(zp three resistors are connected as shown. With the switch+a:fedjzz3au-(lp( +ud8 * ro bjt ,mp 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 connd) j822 *; bxgfai prt4yofnrp0v1kj1ected as shown. With thejxaf;p1of2n 1pk r80gdbiv 2*4y rt)j 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 ideal +lot+ hi.7 idlammeter, a switch and three resistors are connected as shown. With the sw+l .lto di+h7iitch 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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姓名:游客(未登录)

总分:50分及格:30分时间:不限时

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