16.09: In the circuit shown, a ml4c4/mcue3,y 9k-zn/ dwbxrn 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 electrilzn4 3/cx 9k c -/meb4rum,wydc field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_-c8r *5eygze n,i9 .ioizarh5tw279)eatu im________each resistor is the 7yc5gh9wuitz*9)2i a.ta -ei m5zn rioe8er, same.

  06.33: A current throgb90mi dpra 4o7ios1.mj)r+ tugh the thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens becauseoo )0drm+1p9g7ms4r t .jbiai

  13.08: Some standard household lih0cxd )n 6hh8c:i3 demghts are being replaced with LEDs. LED is the acronym for which one of the follox) h imh0c3he8:cd6d nwing choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area A. n 1;rdnsgxo.4It is to be placed into a circuit, but it firs4r gd.n1o nsx;t 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?

  98.20: Wire I and wire II are made :z5 /cw hmoltfky9d3, of the same material. Wire II has twice the diameter and twice 3 t y9fol/mz:h, wck5dthe length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter and halh1 *nth : (2cpjokm,fn.ks3vs:- zjzd f the length of wire X. If wire X has a resistance of R then wire Y would havhf j.v:jks-c23*( szmznt1 nkp d:,hoe a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of materiaqp4cm bigh,g4 ntu0 rm5q5e 8*l is then drawn so that it is a cylmtc4h0 bgq*mr ,85qin pu4 5eginder with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter lightu t ruezpa9fl(19x70t mn9.is bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light a im t1t9xpr 9f79 ua.uensz(l0t a given voltage?

  16.07: Three cylindrical resistors are made of the same material.3 v+ qrpi)eo bd284 mfpghj3h) The length and ri) evp djfobr34g2mq)hh +83padius 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, /bn87 xxnzgn5are connected to a battery in the following way: “Two resistors ax/8g 5n7nxnzb re 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?

  95.35: The voltmeter in the accompanying cxp.axa mk:aj6s u1c,1ircuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reup6,k :c1a1 sxa. mjxaading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound cir4syl- 0 oslus:cuit shown to the right. The three bulbs 1, 2, and 3 - represented as resistors in t l-lsso:y40 suhe 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 rij-3l78paul i.-w y- j:nx ppyight. If the current in all threupy payn --l:lw 83- j7pjxi.ie resistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simplec db5l is841k)y:vj jl electric circuit composed of 5 identical light bulbs and 2 flashlight cell 5bkcy:s1id 8llj)j 4vs. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following 9)jr,r,tg1 - zyys roustatements is NOT true concerning the simple circuit shown where resistors R1, 9yjy gs1 rzor -,r)tu,R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected mhl-a-+*ce2tzfh;ib,wq2 +9i hjjg7 sgp:vd in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements ar+ fegjw tmi h+qslhvpa9;g d-b-z: *2 27hi,jce 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?

  06.34: How many coulombs will pass thro ebv6 ,3(*nqoy 3zfq cobsvo3421outv ugh the identified resistor in 5 secozo3*(o3nv6f2qbv uo ,o 1 qtv4cbse3ynds once the circuit was closed?

  00.23: If all of the resistors in the following simplh( ay6ebe0vovmrbsf 6ub oa./9/31 s ge circuit have the same resistance, 6aoreve03.9(m/y s fb6vobb/agh s 1uwhich would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the cu/mc 9v.+gid rb)a2fy l17qsujrrent through the 6.0 Ω resistor is 1.0/ fb1sda79qm + y.)irgjvl2uc A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a bayq1e 2rzrhx7;ttery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W q12e7h yz; xrrof power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to a bm 0 gfnev/vj j7vpwaxrzt2 i/+5 nq14.attery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is thewz5ng +vm0xr ien7/tjjv fap1/vq 24 . current in R3?

  99.13: A heating coil is rat,jr/iri +gkf 9 uu6-paed 1200 watts and 120 volts. What is the maximum valu pj-9 gar/r,fuu i+6ike of the current under these conditions?

  99.23: What is the resistance omjyu ham(o0 n2 u)1,rs4r/zfef a 60 watt lightbulb designed to operate at 120 volt)hn/,yuafm4 mo0j r 12ezs(ru s?

  03.09: How much current flows thro gcr43ldnfsno 9/ 6/rh8.l7uz* vkm lkugh a 4 ohm resistor that is dissipating 36 watts of powerl/8kg*m3o lnd7.fn6sv4/ur h9 l ckrz?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.” Ijig;gqiv ;y-ipa3 lpz5v3/k 8 n normal use, theik;pi3j q3ai/l;-g58 vv pzyg current in it is

  01.05: Which of the following resistances could NOT be produced x.-mop egu1h 9by a circuit containing only three identical 69go.-mh xe up1Ω resistors?

  94.37: You are given three 1.0 Ωphzg7ws5(ag2w/ 0i erx(3p mm resistors. Which of the following equivalent resistances CANNOT be produced using pg0zm 7rx5a( (hsgpmi3e/ ww2all three resistors?

  02.06: Three resistors of different va7kc-e7mm xibp41kmxe, pwb:i14a-r nlues can be connected together in different configurations. If all three resistors are used in a circuit, how many different rwp4mx7km --e41bb,a ei in :xmk7p1c values of total resistance can be produced?

  97.35: When a single resistor is cva .)no p4iqr0.w5zbt ;fxv 7d*.umxzonnected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n tvnadivp.u z xox.7)b40wmf r;. *q 5zidentical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having d0 ltjilx u :.5)xi/uzresistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which o)liuuid/5 :0xj zl.xtf the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when operatitgo pk8cy4 5(png at 120okc58tp 4(gpy volts. What is the minimum amount of time that it would take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 obn83(srjbwa ) hm resistor that is dissipating 36 watts of power? s)8r bwbaj3n(

  01.24: An electric heater draws 13 amperes of,l3 tv31wvelo current when connected to 120 volts. If the price of etv3oe1vl l 3w,lectricity 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 kezt3mmx0 8st3csfb23 f ep a 100W lightbulb lit continuously for 1 year at a rate o8ct2f 3s30stfm b3z mxf $0.10/(kW.hr) ?

  12.09: A constant current of9xtqlyt/ 1 n3x,hz o2i 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. hqn/t1 32ol i,xtyzx9 Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a fami8o ,js j)zbr qh;+.pczly of six owns a computer rated at 500 watts in a 120 V circuit. If all sr;jzpz.q) o+bh 8 c,jcomputers 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?

  03.16: A 9-volt battery is connected to four resistor de/ a- w6mfwk66cs*lqr*z9 xes to form a simple circuit as shown to the rigwx6kmd- /c6aefwl e6zqr *s9 *ht.
How would the current through the 2 ohm resistor compare to the current through the 4 ohm resistor?

  03.17: A 9-volt batter,zdcv)s a2 pj:y is connected to four resistors to form a simple circuit as sho c,)zdasv: pj2wn to the right.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, an ideal ap(6f3+ llic;sqso8ml mmeter, a switch and three resistors are connefms3p6l; lcqosl+i8( cted 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?

  02.22: An ideal battery, an ideal ammeter, a switch and th)sy *3tmzbk-y ree resistors are connected as shown. With the switch open as shown in the diagram the ammety* m3-zky b)tser 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 t3:rv moe7 h0wand three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.7twrvh o3 e0:m
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to thp i,.* s:un kmextw:3ke right, what is the equivalent resistance? Assume that all wires are ideal, thk3, *sxki.mn:uw e:tpe battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with re bdnz6j( * zfios cmu+e:088kgsi:m+f 8iksnzb 60gd* jz8uo(ecstances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram bel ag)qusfei :c4z4 .w d90wh)nsow shows five identical resistors connected in a combination series and parallel circuit su0 q9hwen .4gfs w))ziad:4cto a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five id0d -)f exjpl -ujv9hfnl*,u7tentical resistors connected in a combination series and parallel9n0h,fjelfputu7)vxjld- * - circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diag(e tx 8,joq 8z+yh-qyxpf4+gyram, all of the bulbs are identical. Which bulb will be j y(yxfq8e8g yh-x4qz+o,t+p the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three ref3co* fx51cg8k6 kp2 ecjhtw 9sistors are connected as shown. With the switch open as shown i t18*x2ce9f kpcco 5hjf3 6wkgn 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 7, t5v; q9k(ghje2tum q1l g3y kutgs,ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the e(jg,m t3u2g5ghyk9q 1vs,lt qu;tk7 diagram 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 j4 d v+wsxa/:izwe,.e ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.x,4 ws/.:az eev+iwdj
When the switch is closed, what would be the current in the circuit?