16.09: In the circuit shown, an electric curren.nn8 rds(gwb oe-n 9) smzhvd78nto4)t exists in the metal resistor connected to the battery. Which one of the following choices best deso(v)dhog 9n)e ds 4r 8 tnb7w.mnsn8z-cribes the direction of electron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four re wv* oyqf;.n2owav,g(n 1)jeqsistors are connected in parallel, the_________each resistor isaoy,) *qo( v; 1q nv2fgewn.jw the same.

  06.33: A current through the thigmxw(ulz6inhu,i.jy w u (90 /n filament wire of a lightbulb causes the filament to become white hot, while the larger wires connect,l(wu .hg0uy6xiw jnmz /(9i ued to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being8jauz n(5.t1v,n 5 w1yano lto replaced with LEDs. LED is the acronym for which one of ty uwovoa51zn8(5 ln,1j.ttn ahe following choices?

  05.16: A cylindrical graphite resihzn4r-9: q .nrmayou2 stor 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 theu:94q.n zrm-2ron y ha 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 wi5qry+,cr 0 ( qo:ricpkre II are made of the same material. Wire II has twice the diameter and twice the length of I. +prrcyirk:q( q0o 5c , If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice thmd85 oov,aba -e diameter and half the length of wir5d,a8-o m voabe X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical rez,1fw,hg gman 2mhc/02rd 6kesistor 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 resistance of this material because of this proceh1/ ,gh2,d m2ken0r a6gcwzf mss?

  07.27: A junior Thom;av-v*g- a cpkas 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 tv-ak p-gacv*;o make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resw4vdfy mg9. i8fw7j32,,ybtu u -b(6adde ttgistors are made of the same material. The length and radiu6 watd,3igdw.t-mb9yd ufygu(t,4 f 27v je8bs 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 conj0; n-eqvbx u*nected 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 equivalent resistance of this arrange v*jx;nu-qb0ement of four resistors?

  95.35: The voltmeter in the s) y/(8 dubgbdaccompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohmdsgb(/8b ud)y. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shgbaau xdl)vi().x86 l own to the right. The three bulbs 1, 2, and 3 - represented as resistorsu6ax(x )g)ivl bl8.da 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 ch6atfg,0d4*it au m )turrent in all three resistors is equgh)tmf i*tt0a,6d4 aual, which of the following statements must be true?

  99.37: The diagram at m07m9gdr rjt *qvj9-;rqf l .cright represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Wh9;m*cvq9rt.gjr7m r0 lfq-jd ich bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the fn (av07amfxio*lv;,yb q5,m: br4/pc7 eqwvd ollowing statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resistances 0ail qfw :7px(,mm vqbvbv,n/da* r ;e7o5yc4?

  17.29: Two lightbulbs cnd 5nr 5n:wkf/d +k+qe 4h.ziX andY are 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 repre ddn++ ki/z5f4rn:en.whqkc5 sents what is observed?

  06.34: How many coulombs will pass through the identified resi j2txnm.*ny5l stor in 5 seconds once the n2ytlm5xj n.* circuit was closed?

  00.23: If all of the resistorr)cocb9si,ezgp 2 0 q; )tv2hps in the following simple circuit have the sames brzp20qeov ch; t, 2)cpi)9g resistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω (0hpkuf qq;hj (5(/ x cby.doj resistor is 1.0 hb yc(kj(hf qq(ox5 /u.dp0 ;jA. What is the power supply voltage V?

  97.27: Three resistors R1, 6 y:k gt*nezt8R2, and R3 are connected in series to a battery. Suppose R1 carries a currek8zg*et ny 6:tnt 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?

  99.40: Three different resistors R1, R2 andR3 are connected in pajw tf4o5)dl,w8di b7vrallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W.t 7wlv)5i ,b 48djdwfo What is the current in R3?

  99.13: A heating coil isu;a(7ip8 v7:mua y bze rated 1200 watts and 120 volts. What is the maximum value of the current under taz7 vb8 m iap(:e;yu7uhese conditions?

  99.23: What is the resistance of a 60 watt ljxtsz -bzi5; ,iws/ l8ightbulb designed to operate at 120 volts?z ;tlw,xb -/izs58isj

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 sde n+nhhmn,w -l-se*ob9p,( watts of pow,(ed- m b s,lo+n9 *hesnnw-hper?

  05.21: A household iron used to press clothes is marked "120 vzu2dawi0*t0t laoo4od 08)cb olt, 600 watt.” In norma atz0)42da 0 t8uoc0dlo wboi*l use, the current in it is

  01.05: Which of the following resistances could NOT be produced by a circuit con1kk mim0t n ilo +i2gi+o1.s)l :j7pfnkw( lx+taining only three identical 6Ω re+ifjp:on w oix1702kkt .im(gk)lml i sn1++lsistors?

  94.37: You are given thh whb,3ffya( )ree 1.0 Ω resistors. Which of the following equivalent resistances CANNOT be produced using )fbfh (a3ywh, all three resistors?

  02.06: Three resistors of different values can be connecte1(d ) 4jtflrqr4x jvy4d together in different configurations. If all three resistors are used in a circuit, how many different values of totay(t)dr4 f41vx 4rjjq ll resistance can be produced?

  97.35: When a single resistor is connected to a battery, a total power P is dis0c 6b:i)fex) f0prt vvsipated in the circuit. How much total power is d06etpf0bv )v:r)xi fc issipated 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 connected c2 i;jcdlioso;0-.,e wx qbf6 in parallel, the equivalent resistance of the combinatio0fxi, d 2 joic cb;.l;oes6qw-n is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is desigt9-y2,kwc 7nf/ ille.svh7h b ned such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time thk. c 9nyhb/vlhf7i ,-e7w2lstat 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 ohm resistor that is dissipating(lep 4xnsrvqc(fe.0b :f4 mt1c- to4 j 36 watts 4cte:(psr 0l m.4 jnqt1ffx4-oc(be v of power?

  01.24: An electric heater draws 1slu 2l+.pni2b3 amperes of current when connected to 120 volts. If the price of electrici.s+u2n2llib pty is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would it costm3,xi*mk0/rjt3 o xeq to keep a 100W lightbulb lit continuouslymt0m/oeq ,ikr j3x*3x for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbun)tle uh,au:07 7isvk lb results in a power of 24.0 W associated eu :i 0a7l7k)huvtsn,with the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of8i62zq 7 mtkbs six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugiqmst 78bzk2 6ged 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 connec 5;a g2v w+6ux1p.4cxdzgszfqted to four resistors to form a simple circuit as54dvz cfpxg 1wau 2s.q;z gx+6 shown to the right.
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 toe7g i6 alm*x01aflb 4b form a simple circuit as showex*1mi alb6a70 b4glfn 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 ammeter, a switch and three resistors are co4px+udw3jf n1 -f frk8wti zc6a:11acnnected as shown. Wi1:pf8t3 4a xuw1dcr6awjk f-f+i cnz1th 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 idealetk:myvdz* /5 ammeter, a switch and three resistors are connected as shown./mvz5td: e y*k 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?

  02.23: An ideal battery, an90 w0l exnqe9i ideal ammeter, a switch and three resistors are connected as shown.l x0n9wq09 eei 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 rig k37p7 vryr/ivht, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistrr73pk yv v/i7ors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown rp n5e uzewss,,85h+mto the right with resistan,se8hz psr 5 ue,wmn+5ces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical h4s w-9iwm5jp v*dol.a xc60q resistors connected in a combination series and parallel circuc0-o5.j *wm w dxvs aqplh9i64it to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identivn,ge jt.bl 8,4zrgh( cal resistors connected in a combination series and parallel cirzhn4,gb jr,eg. l(v 8tcuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the buoaw-3i1:)zod hz ) tdylbs are identical. Which bulb will be the byodi :do) 1h)zatwz3-rightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors a4,-tpq gl xtko/z-ur,re connected as shown. With the switch o 4,tgqp- -ro/,ulzktxpen 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, 1d52 enkz2;j3z cz vcza switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter rea13j;cd5ev2n2z c zz kzds 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 resispb,wc0tiw;l 0tors are connected as shown. With the 00,b wwclipt;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?