16.09: In the circuit shown, an electric current exist3q 2j lffi/7nkim +10hmljtih,/rh2 is 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 thijm,jf mql+ilk n3/0 2hhi7t1/rih2f e direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, 7nbih1mnt3i(; y hek6the_________each resistor is tht6b13nni m(;h k7eh iye same.

  06.33: A current through the thin filament wire of sqjx;74f *f g snqi k5jf.psv3m.8be:a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happensv .f fn4kjbq8s.;egj sqis35x7* : fpm because

  13.08: Some standard 0za 0xpat;l;h s.9tsmhousehold lights are being replaced with LEDs. LED is the acronym for which one of the following ch 9 maxah p;z;t0tl0ss.oices?

  05.16: A cylindrical graphite resistod7nnknbf/7 a;wm k08ur has length L and cross-sectional area A. It is to be placed into a circuit, but it first must be cut in half so that the new lenmdkfnnn77uk8 ;a/w b0 gth is 1/2 L. What is the ratio of the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same max(-cg4dgto . u3 7ysreterial. Wire II has twice the diamete7yd.g(o-ts c x eg4ru3r and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of thpch1t2iwwp4c4 nc uf)ejv;z dwqh7y9i7(, i8e same material but has twice the diameter and half the length ofywiic;t h7i4due 7z(4ph1 89q2wnwc j,v) cpf wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece s1lo(lj k x :s fhcf3*47i)egwof material is then 3i)glfflx 7osskw1 ej( 4 h*c:drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas wf) di;ss35) alvv1di Edison wants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make thi a3s)l;dv)v1 5sidwf e lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. Ter(mnp h3au ,-he length and radius n uph3 ,rame-(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)?

  13.22: Four resistors, each of resistance R, are connected to a battery*sk +qgvq:5j a in the following way: “Two resistors are :5ak +*gqvsj qconnected 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?

  95.35: The voltmeter in the a6/gky9/ h2rywteqkik 34na g)il11jlccompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading 13hk94)6ay/q/kk y rlgltigi e12wnj is most nearly:

  97.37: Consider the compound cua 0o-c r skh5z(d1:scircuit shown to the right. The three bulbs 1, 2, and 3 - represented asrs u:czc -ho01(5ksda 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.

  99.30: Given the simple electrical circuit at the right. If the current in 8y*1msd .qnscall three ny*c1mqs .ds8resistors is equal, which of the following statements must be true?

  99.37: The diagram at right representllv1 swx/p17g s a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or 71 wvlxgl/ p1sbulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOTn 48sfai olq) o1,fx5:gvm*hm true concerning the simple circuit shown where resistors R1, R2 and R3 aroffn 5 qi:hov1m), l4sm8 agx*e have equal resistances?

  17.29: Two lightbulbs X andY 6bsv4* uz4 :w2 io+z4bzlph huare connected 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 represenw +v 42b*hi zzuz4b6:uhlpso4ts what is observed?

  06.34: How many coulombs will pass through the identified resistor i)xsr4zlf9: s:iutg r; n 5 seconds once f usxz :):irl tr94;gsthe circuit was closed?

  00.23: If all of the resistors in the followi ;uorc53 /yrgtng simple circuit have the same resistance, which would dissipr rg;yu ct3o/5ate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the + x ,otj7yiry5j( ni+u6.0 Ω resistor is 1.0 A. What is the power supplj ,onx5ir 7 ijyy+(tu+y voltage V?

  97.27: Three resistors R1, R2, and R3 are ;otra .aw85sm 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 voltagmwt;5 as.8ao re across R3?

  99.40: Three different resistors R1, R j*u mikj+c05l ikb*-f2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. Wjk5i *-0filu*bm jk+c hat is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What jn+3d/wduu8u is the maximum value of the currenu+jnwu3 dud 8/t under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb d uqecu57 df+5c)7kp rwesigned to operate at 120 voltc+)5cru 7pufed75kwqs?

  03.09: How much current flows through a 4 ohm resistor that is dissipatit fvhspf 8(*.png 36 watts of p vfftp(8 hs.*power?

  05.21: A household iron used to press clothes is marked "l+eldozqt :8,120 volt, 600 watt.” In normal,zeqlt d8:+o l use, the current in it is

  01.05: Which of the following resistances could NOT be produced by a circu7i 82ko+9h6pdvr zrl oit containing only three idzh2i +89 ldo7r p6krvoentical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalent uy)lb7b p0mo k8oih1un9 w bsjqm;-+5resistances CANNOT be prj ; wi+9qmouhb7 0s )n8kopb-5b 1ylmuoduced using all three resistors?

  02.06: Three resistors of different values can be connected togeiam,8mtk c u50el-6lj ther in different configurations. If all thrjl -ae68t,5l mmu0kci ee resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single fk.+nt,e us,4 qzg+dmresistor is connected to a battery, a total power P is dissipated in the circuit. How much total power is dissipaum.g+,4d+ ke ,zsnfqtted in a circuit if n identical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are conghk(dbud ;q41b nc4z 1nected in parallel, the equivalent resistance of the co4 d1zun(hk1bdb g; 4qcmbination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is desigkj:h* h k:qc3pned such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take tjpqk:: 3kchh *o warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissipaf(p5qw n04yoz ting 36 watpon4fy0 w5z (qts of power?

  01.24: An electric heater dra snj0,bi;5)ic(y7xrq+ bx vuwk5xz 0ews 13 amperes of current when connected to 120 volts. If the prin+qcr7b s;0 w5vb ,5xijki(xxeu 0yz)ce of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would it cost to keep a 100W lightbulbtg9 ; ivsb;0c7c4cx rd lit continuously for 1 year vd4tr;ccci09; sx7 gb at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb resultsm c8im1oig:06)qige m in a power of 24.0 W associated with the bulb. Which one of the g:co8 ii )0mmeg61qm ifollowing choices best represents the resistance of the lightbulb?

  01.10: Each member of z+g4 ffd.+uuv a family of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit+.zduvu4gff+ protected by a 20 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four m8fabk69li+baw mc 7 ns.- ee6resistors to form a simple circuit as shown to the righc 7wln e+.9bma6 6bfsma8e-kit.
How would the current through the 2 ohm resistor compare to the current through the 4 ohm resistor?

  03.17: A 9-volt battery is connected to four resistors to form a simple co9uoep27b gk2yj( zf a6o9s7iircuit as shown to the 2ifpzg7(e y6 k9o7j2 oabsou9right.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, an ideal ammeter, a switch and three ren1n6i5y : i gs 6-qe)l1um u3jufzti8isistors are connected as shown. With thesy-i5nuugz6 f6:t ijl n8qiu1i1) me3 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?

  02.22: An ideal battery, an ideal ammeter, a switch2rcv 2f( gzz8w and three resistors are connected as shown. With the switch open as shown in the zz2v wr2f(cg8diagram the ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter, a switch and three r y8-swi5j.ff k rt o*gx29ode+esistors are conn9+kdyri*2owe-o.j 8ft gfxs 5ected as 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?

  12.14: For the circuit shown to the right, whaev+ f9n,h ugi6qgqpr-j o p:;7-dj.i gt is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistanc,: 9ihr;-p-jdq ovn+e6ugif .p7jg q ge, and all three resistors have identical resistance R.

  09.07: The equivalent resissdo j7qm)cb 8+31epdvkn+f *n tance of the circuit shown to the right with res endp +3fmn7 qs )*bdc1kjo8v+istances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five ide:uypv uwt*37t ntical resistors connected in a combination series and parallel circuitpy:uw v3t*tu7 to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistorzg(8 xzk5dgg7/ oy3ors connected in a combinationrggx 3d/5k8g(oy7zoz series and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the y.n;0n8kaxmgbulbs are identical. Which bulb will bx;0kamnn .8y ge the brightest?

  02.21: An ideal battery, an ideal ammeter, a sd z2eb 5/hhn3switch and three resistors are connected as shown. With the switch open as shown in the diagram/ nd eb523shzh the ammeter reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal a0,:2kpsuz wkq2 ppc xu0bx:b.mmeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram t 2 b:p2:kxbzq k.0sx pupuw,0che ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an 33wuw*0kmfg nideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram0nw3g3f* uw mk the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?