16.09: In the circuit shown7uq 4tywg(ceg.e / poz9ey;ukhot/) 1, an electric current exists in the metal resistor connected to the battery. Which one of the followingh)(gyy4 owqtut p1g.9; e ee 7//zkocu choices best describes 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 resistors are connected in parallel, the_________each rest .pd3xvvdm o7 +1u/yfistor is the7 .u 3v1mx fpdtody/v+ same.

  06.33: A current through the thin filament wire of a lightbuw+2ujqn b-(r zlb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cool+b(r- qjuw2nzer. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is th eubrk,j 1 (ta-lp4xg;se6b.ibim/7ge acronym gkgb6(im;barp,jeux i b-l 1te.74s/for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectic 4i vw/a9t 2si+pcl p/70kovoonal area A. It is to be placed into a circuit, but 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 resistiws p/20pitl9c7covk a+4i /ovvity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same materiajjzsl 2bw-s1c05y q(sl. Wire II has twice the diameter and twice the length of I. If I has resistance R, I(zq js1s lyb025s-j cwI has resistance

  99.31: Wire Y is made of the same matheo.ra 36ku5f2wo p 9z7wil/p erial but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would hav9 z/ooua ke56 iwp7h3lfw.2r pe a resistance of

  03.23: A cylindrical resistor has length L and rvar8)p 4bp5hjj+bgv9+rocf 9adius 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 materialc 5+9 pgfh9 pr arb8b)vjov4j+ because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulw8;-; pazy0a2elyid j b. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more ligaz-i y padw80l;;j2yeht at a given voltage?

  16.07: Three cylindrical resistors are made onf l(r)v dz3p+f the same material. The length and raf(3+ z p)drvnldius 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, eachr h/a65-qjgtz of resistance 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 equivalent resistance of this t 5 /qa-rzghj6arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internal r8(ri:s tf v6y;xtyb 7kesistance 10.0 kW : 687(ikfr y;xystbvtand the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs ;n(b /-)lya0ct cqdob1, 2, and 3 - repdn c/q cta( -y0;bol)bresented 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.

  99.30: Given the simple electricub) ur(njjg,7;8ypr ral circuit at the right. If the current in all three resistors is equal, which of the following statements must rju87; ,(ynp grjbur )be true?

  99.37: The diagram at right represents a simple y ;ums67atbn8je q8d4electric circuit composed of 5 identin7dbaysj 4eqtu8; 8m6cal light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the s4xpqxeu k, 6r)imple circuit shown where resistors R1, R2 and R3 are have e rxu 6)k,4qxepqual resistances?

  17.29: Two lightbulbs X andY are connecj7ud+7gq kw*a w: (tiqted 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 the7ugw 7*:+wj(t akq qid same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through tm-xy j92*b go xp65kh:;bs llwhe identified resistor in 5 seconds once the circuit was closed? pmyb2j xogk :56x hw9*b-;lls

  00.23: If all of the resistors in su 0,d6a0ozmt the following simple circuit have the same resistance, which, smt 0z06duao would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through f itr8pqp-z *:the 6.0 Ω resistor is 1.0 A. What is the pp-*f8r: izqtp ower supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in seriz rkvh /+fj8*wes 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 voltafvr h*/jw +kz8ge across R3?

  99.40: Three different re j5cp5lz. jf: c(xapfuld t5a*j*h*k;sistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is t*k5jtxp;zpldfl5a(5 h jj*:.*a uccfhe current in R3?

  99.13: A heating coil is rated 1200 h*yrgh 4 dfi iw-.d)5tijo-, fwatts and 120 volts. What is the maximum value of the current under these condirii *- dhdoghjfi,)- wt y.5f4tions?

  99.23: What is the resistance of a 60 watt lightbulb designed to opeiua.ld/2/rkdrj ;j k0rate at 120 volts?uk.d0k/;jja2 ilrrd /

  03.09: How much current flows thrwta1 d: vd13omough a 4 ohm resistor that is dissipating 36 watts ofv1od:m d aw1t3 power?

  05.21: A household iron used to pre/- um f rt7hcc..tohy:7h ftu-ss clothes is marked "120 volt, 600 watt.” In normal use, the current t ftuu -hh:t-r7c/7f.cy mo.h in it is

  01.05: Which of the following resf*x(2etc8 bob8m 2z fcistances could NOT be produced by a circuit containing onlyefc(*828bfom2t zx bc three identical 6Ω resistors?

  94.37: You are given three 1.0i :wtdjk5,o g: -z4yzm Ω resistors. Which of the following equivalent resistances CANzg-i:,wt ojz:y4km 5d NOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together in diffzc avfxh/(*hh,whnn6 :46ubwnf4 ng + erent configurations. If all three resistors are used in a circuit, how many differen z fannbn6xu h:g,6hh*nfw( /h 4w+vc4t values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a tot fva6ku+q0e0w al power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in series using the same battery? Assume the internal resis 0aq+ek u6f0wvtance of the battery is zero.

  96.16: When two resistors, having resistance R1 xu5 tx .*.7cwtd2q m,pq)n a0-7y)vgsvkuifh and R2, are connected in parallel, the equivalent resistance of the comn wv t50,qksu)dh ia) utfq.-p* .7vm2x7cxygbination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resist5fsc hhl 4-j7uance of 12Ω when operating at 120 volts. What is the mini5 hu jlc7hf-4smum 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 +:eu +z1 ixhhrflows through a 4 ohm resistor that is dissipating 36 watts o zh +1i:e+xurhf power?

  01.24: An electric heater draws 13 amperes of current when connected wg3w f/p awd:4r3d ag:to 120 volts. If the price of electd4 ::d fwg gwrp3waa/3ricity 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 lightbulb lit cfvw7ap ( 0+6ne 1e2wxwfr0i2qy1nxdbontinuously for 1 yeax 2 (fd7 b6yrn11q vnwpx+0i0ewew2 afr at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a liyqd/gsn wbo)lk:ch)-+0 5ih z ghtbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of theziwqlh )och -n/+: ykbd)50s g lightbulb?

  01.10: Each member of a familyayr3 :, (myqcw78ghd y 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 fu( yy87q:wr,g3amy chdse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple cr+q */ ufb(6iuho2nsxjv4x f7ircuit a u(b7f* i6+4r/vjqou nf2shxxs 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 d6e (hu /mx,x(;z ndomresistors to form a simple circuit as sdnuhzde/( ; 6 m(,xxomhown 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 an8: 4vq2qm kmjpzpc g0t3 ;in)ad three resistors are connected as shown. With the switch open qz3j vm)gqca; 8 pk02t im:np4as 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 swvk q8dcmh8tnyioy) t*s;2;2nwf a e.nnpq:)2itch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampertvyp* i2q8 f22nancq)k.m nt;e 8w;:hso)n y des.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal batteri/tvd-tgk74v xb 8a4zy, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the a4tb av-x 4k8diz7vg/tmmeter 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 rightvor.exjhz+6df ai,,5s r52dt, what is the equivalent resistance? Assume that all wires are ideal, the battery has .h jt z6r5e+, f,dd2rao5sxi vno internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right withu1lke z :*cm:0*yetfu resistanc *uktm1: c0le:fzy ue*es $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combinati5w9u/y gxwsq( on series and parallel circuius (xyqgw/5w9 t to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical regcj m,gocc381 sistors connected in a combination series and paralle o j3ccgm,1gc8l circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of t:vy;c ce.d6.g0ru pbkhe bulbs are identical. Which bulb will be thbk re:.0cyg cvp u6;d.e brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resl/ zmn +2f8dvyistors are connected as shown. With the switch open lfz+y v mn2/d8as 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 three resistors o+(ld y++quqk are connected as shown. With the ld qu(qy ++o+kswitch 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, an idea xonnits u--v3(ew0ll)5ems 2oz gr8 ;l ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 x -louw0trsvo5imn8 z3-;ge2nlse ( )amperes.
When the switch is closed, what would be the current in the circuit?