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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 elect)fvsjn5v 6tt; ric 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 of the resistor? sfn6jt ; )tvv5

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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 parj zmpp/uel5qcg : xlt/)lr f1m+()l+h allel, the_________each resistor is :+rmtl/ml()q5 lxpj)/1hf+clu p ezg 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 thevsl(+ipol a)2 c91lxp2 j3ryi thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lighv 23y9lc) alr12 jsiixl(p po+tbulb 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 lig4flvp q ,wvr;+hts are being replaced with LEDs. LED is the acronym for f;pwlq r+v,4vwhich 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 rm)),:plgl y2vi2 jebcp4z6 jhas length L and cross-sectional area A. It is to be placed into a circuit, but it first must be cut in half 64 zepc: pv2mir g2yb,ljl j))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 qj/cpfziv- kj9jb, rw70-4abare made of the same material. Wire II has twice the diameter and twice the length of I. If I has resis,bqva/cif- 0-7 krb9 pw jz4jjtance 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 tw.rve7s31c*1q*a1mnw v vyj el3w5 m ajice the diameter and half the length of wire X. If wire X has a resistance of R then wis*3cw*mm1l rjv3qa5.1nvej1 yveaw 7 re 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 5m*(f):dndev :x oqmhresistor has 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 res:mnvhdmfd5: e)o x*q(istance 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 w5 awh)sf r2 b/ lz8jalkk7uw+9ants to make a brighter light bulb. He decides to modify thk+8ajb2wr whz)5fu79lk /lase filament. How should 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 cylindricalh4af* q/.fk a+eap*rr resistors are made of the same material. The length and radius ofr ka/h4af qr* +*p.efa 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 rec2rk:vdz :f9m sistance R, are 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 third resistor. This set of three resistors is connected in series to a fourth resistor.” What is the equivalem9f2dcz rvk:: nt 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 intedncw0(nscc tyn 1y9c6*hj5n *rnal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is dncc c*nwcs0n69hy*51 (j nyt 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 shownir:o mr wx*f)si:z o 83jjrqj2/rh2 g) to the right. The three bulbs 1, 2, and 3 - representm/2s )izo:if )*jr oj:wrgj8h32rq rxed 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 ricufjz+gi/z1 90lnkv )hi s 3.ight. If the current in all three resistors is equal, kc i +j.9 izfz0ilnu1 hg3)sv/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 co:3lt qw (;dh2l-xaw wsa nrg xx)w91y-mposed of 5 identical light bulbs and 2 flashlig q-2x g-)ay(1xdlh9a: st nww r3xwl;wht 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 concer.qxw; 8 vnnp4hning the simple circuitqp4xn h8wv.n ; shown where resistors 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 connectedmosj79wi; dl h0rb1-n 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 best repre-s 7b;hjd inlw91m0orsents 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 uvx(lr1z v* 78nn2 txpwill pass through the identified resistor in 5 seconds once the circuit was closed?vrx7*npz (2 lv8tu1nx

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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 resistorpezw)b+f-y+dna b c8 8.wiwa4s in the following simple circuit have the same resistance, which would pawda-8b8 bci4 +wz e.fywn) +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 accompanyingf 6zl-r.dj5cuup )r 9g circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the9d6lrpug- 5z r)ufj. c 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 vwyj 3r*1 kq*nseries to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω*vy*nj 1q3wk r, 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 different resistors R1, R2 andR3 are connected in parallel to a bx ib(wnxjy-erau9if1t4 k.s5m9h ;/ battery. Suppose R1 has 2V across it, R2 s9i k4e5ij1t.r- fnxy/;xa w( h9umbb = 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 rate /im0p; 8m *ya,jtsugcd 1200 watts and 120 volts. What is the maximum value of the current under thesemm0 ;a,st8 pg *yucj/i 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 operat*29/ av ,qyw h(ywnrb 0nupqv(e at 120 volt (n/qba0w9*2 nyuqv,v(wpyr hs?

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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 throumrrjsa)z ft x 2prv19f1:7jh*gh a 4 ohm resistor that is dissipating 36 watts of pow91t7rv:1 rpf* )az j2j srxhfmer?

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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 fqon 1q3, mqy27nev-*k)cq k5hf1 d gqmarked "120 volt, 600 watt.” In normal use, the current 2c-me f7fn13dk*h5gnq kvyqo ,q)1 qqin 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 followilqabr k3--y60v6 dzww ng resistances could NOT be produced by a circuit containing only three identical 6Ω resisbd--ar36z 0wlv6y kwqtors?

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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 giveno* a(rte .:qxc three 1.0 Ω resistors. Which of the following equivalent x .t:rae* o(qcresistances 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 l 8*fg xpg4b-zlnvey9),uh85xzyf.a of different values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of totag4lp8)f8x b.xfya yz,n*9ezvul 5h -g l 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 con+4rh. ik b hhr8x*oai5nected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a x5*8k4 .io+hbri arh hcircuit 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 conne.0l7,c af knk:ai)/ nn1ccgb bcted in parallel, the equivalent resistance of the combination is 5Ω /0c ckl, 1) a gfnin.bka:bn7c. 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 resistance of r bgirn0 zm :p(9lubqnj5;.c112Ω when operating at 120 volts. What is the minimum rrin.5mb b09 j(npclg q1;u:zamount of time that it 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 that is dissipating 3601 zxe ;kf.zaszu06 ouw/g:zm watts osgao k6zzwu 0z0e;1./ zm: uxff 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 currenp;y(1c5 1uza xotntk 9t when connected to 120 volts.; yu1x(t9z at 1p5nkoc If the 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 i1 5(2qo jusfqe(2ferit cost to keep a 100W lightbulb lit continuously for 1 ((ei sfqq e5u21f2oj ryear 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 znw,wuuo-e,v+2i(v 5umkh6 d A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one okuw-+ i d ,(unhuov vme2z65,wf 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 of szdvo v5-: p6zoix owns a computer rated at 500 watts in a 120 V circuit. If all compu65dz oo- :vpzvters 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 co(l9zig8rs i 5di,t nd3z-t9spnnected to four resistors to form a simple circuit as shown toz9d tg( 9li dsisr npz5,i8-t3 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 simple circufv0 smg; d1 5wplv33neit as shdfvn1p5 mew3 3s0vgl;own 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 and thr:dy k nuz* rfnoo*.e q,y2o29yee resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperesz*u,yny 2o:onqokyfed 2 *9.r.
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 aalphd21rs.fcc;(5d g re connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 a1df g2rc( spch. l5;admperes.
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, m bh o7yyic(hcj7;36 qa switch and three resistors are connected as shown. With the switch open as shown in the diagcobym ;7h736i(y jcqh ram 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 shownsm )gav7:ar0 s 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 identv7a0 a)smrg s:ical 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 req o:rzike j4./sistance of the circuit shown to the right with resistark4z.i e:qoj/nces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ 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 mrf 2x2jyiau8va1 3vr rd+071 dyon.a identical resistors connected in a combination series and paralle 1r31 xrv0rd + udvyjm 2a8ayo7i.na2fl 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 c kh+h*yg:i9 qresistors connected in a combination series and parallel circuit to a voltage sourc+ qg hyck:ih9*e.
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 bbyg8(n/mxn j4(a4mjz y urvgk-n ij0)n2;y6 fulbs are identical. Which bulb will be the brightest? 6vr 0i4jbg xnnayu;2n y/m( fk-8zn(j jy4)mg

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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 c 0crcwgpvi ,d :m31z.three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.wcmz:vp d,c1.30crg i
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 b p6xw ux5s70dn qmw. q(ieqi)sae b0j (/u5/aand three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 a5 a0jqq dxswwban(pe q 5)e/7um/.0(i6sxb i umperes.
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 an6,x; zxx,uvac(rx ) zud three resistors are connected as sh x(6u,zv rxz,;cxx) auown. 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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