16.09: In the circuit shown, an electric current exists y496oyu-slms ) (oxld in the metal resistor connected to the battery. Which one of the 9yl)l(d ous-4 osy6mxfollowing 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_____i /*n0wfvg5 xx____each resistor is tgfxx/wi0vn* 5he same.

  06.33: A current through the thin filament wire of a lighte4y *qviev, yy--.b2e4 m61peohc zje bulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happe- .,qeeem cbozp4y4jy6-ev i 2 1y*hvens because

  13.08: Some standard household lights are being replaced with LEDs. LED is th trv4/c1 qd11 eii8ixte acronym foq cetdiv1 41rxi8/1tir which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cro5lv2lc+p(pv2 9b urn tn6d2kh ss-sectional 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 resistivity 2 pdlvr25nklt+6b9(2chn pvu of the cylindrical resistor?

  98.20: Wire I and wire II are 7hfx76p km ij5made of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has resistancp57 fjkimhx7 6e

  99.31: Wire Y is made of the same materj e98gzhqq4ig(z4;ve z c0:leial but has twice the diameter and half the length j( 4e0 qzi9egqc 8v;z4lgez: hof wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resisto+8iu6t gb. tt ze5ds5jr 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 .6ttiz ed8 sbu5j+gt5because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb.)f 3od:c9 fm8 mta8sws He decides to modify the filame )ws8smfd8f:9mc3 t aont. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistorucr32d r.sxro et..y8 s are made of the same material. The length and radius ou.rsd3.y2 e xr.8trc 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 con*bd mbkfq3spd7ap;q ,n y58;pnected 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 ;y 8s7qdap3*;bkn pp,bqmdf5of 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 acn zbf68/zyo. ycompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter zyny 6/8.zobfreading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to tha ui(h( pg jdi5u9soi5jq3t2:e right. The three bulbs 1, 2, and 3 - represented as resistors in the didai q :9shjit2jog3ip((5u5u agram
- 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 us5(pjnx;gf:qb z ,e)m/fvj4 .m7vrrelectrical circuit at the right. If the current in all three resistors is equal, which of the following )/4xe zsmj;vfpungr.5:(v rqf ,m b7jstatements must be true?

  99.37: The diagram at right represents a simple electric circuit compoj 43drkry t,ta+2)csd sed of 5 identical l s4 rtd a,tkdj32y+)cright bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statecq; kd 0l vg4uu5j:5masjz/7 gments is NOT true concerning the simple circuit shown where re jc/dqj 0v us5gu;7lgz4:mk5a sistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulb5d(oo 202 mizq4 4c:du rkzhcys X 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 t:m do4uhoz ( cz2qkdy2c 05i4rhe following choices best represents what is observed?

  06.34: How many coulombs wzsak m 4s-46aqill pass through the identified resistor in 5 seconds once the circuit was closed 46 qmaskz4s-a?

  00.23: If all of the resistors in the following simple circuit have tht6:0tz 7sval ae same resistance, which would dissipate the gre60at 7z:tslva atest power?

  98.34: In the accompanying circuo*+, t2ag7yy;cm s xorit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is ;cy7agm2o* ,styro x +the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to cz(;(b hlexnj3 y fv,:q4apv5a battery. Suppose R1 carries a current of 2.0 A, R2 has a rla,v5f ; jqx3zyc(e4(:hvbpnesistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 al+;6*pev iwhl9 ,rup4hnn0w c ndR3 are connected in parallel to a battery. Suppose R1 has 2V acrlh uhen 4,ciwvrp+0;nl*9 6 pwoss it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 120+ jg9uy4kywv*0 watts and 120 volts. What is the maximum value ofvyw9g*4u +kjy the current under these conditions?

  99.23: What is the resistance of a 60 wat)pq )rjl +ncbd6gj-vb s7q j4*t lightbulb designed to operate at 120 vo+ s4n pb-dj)l*rqbc) qg76j jvlts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 3llw,l,e4r rtx-m nmtd :4m ,b96 watts r4 e l,4 xb:mt-mlt,nwl,md9rof power?

  05.21: A household iron used to prkab +rh(r2 dxi f.t0g7ess clothes is marked "120 volt, 600 watt.” In(rrd hf27t0ab g+k. xi normal use, the current in it is

  01.05: Which of the following resistances could NOT be produced by a circuit5l5* ,hqnirf8ouas y8 containing only three ide8f u,5qlh nyiao*8s5rntical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalent: az(rsu xc*(s resista (x:rsc* u(zsances CANNOT be produced using all three resistors?

  02.06: Three resistors7**wfcl40wi ah8 veumzq *-zh of different values can be connected together in different configurations. If all three resi0 wz**uz cfa *l7vi wm8he-4hqstors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single li( h,e6k;n5ozyklg6 resistor is connected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are o6z5(e;hyl6, ing klk 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 connec p t+vvwgns0ai.7(j6 eted in parallel, the equivalent resistance of the combination is 5Ω . Which of the following state6 je.gwvt7+aps ni(v0ments about the resistances is correct?

  02.46: A hotplate is designed su6m(j iq) 2jf,vha) c2sge+p0 cu0 cvzuch that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to ucvv) uq s+ap,2 icm6hgj00f)jez2c( warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a22 ke-dz 8si t +aa:k2dyz2neo ts2u5a 4 ohm resistor that is dissipating 36 watts of posad2teiy k+2 ae2 :szao25uzt-n2 8k dwer?

  01.24: An electric heater vd8d vdwk-r)1c yzcj0( j3a6vn3x5ee draws 13 amperes of current when connected to 120 volts. If the pcdyzjv8e(v )r5ndc k x a0e dw-61j33vrice 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 lightbulb lit c7wy -ksc f-3qxontinuously for 1 year atfc yq-x7k3w- s a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightb4q:ai67v 8 csf(df yzhulb results in a power of 24.0 W (ffyd v4:867iqh c zasassociated with the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a c xt yl-)-ab2d;fn(kfdbo, c ;yomputer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is -;ay f(n) -od kbd;ftylc,b 2xthe maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resi.zv +mor0q)3 gn pr(fsstors to form a simple circuit as shown to tmf r.pno)0r3qs+z ( vghe 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 to for)cjjrkps lv1:z yg9 88m a simple circuit as sks8pr1jz9lc8v j g: )yhown 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:va/p fcyy58v, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the p5va8 :y/yfvcdiagram 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 are conns j2(k.l uu /vumeb 7m,n1qh8vected as shown. With the switch open as shown in tl71sm/u nub8qk., vhvm(jue2he 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 ideal am65u nkf o+e9wbhp;2 yvmeter, a switch and three resistors are connected as shown. With the swifbh+n 9yep 26 wv;5ouktch 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 show o wm+j3dd(ushbz,97uz2 m:is n to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three m wu2+ oi 7(,z shubszj:dd3m9resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with res4t+vkx/v+cr k,o-4rn5 ic d hdiv 4,ktccodk / +-+5 nvr4drhixstances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a ,ubunsvn4 jcvm/+:a /combination series and parallel circuit to a voltage sourcejnv /+u/4uvmsa n b,c:.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five ident rtvml-jc-:g ,ical resistors connected in a combination series ancv-t , j:-lrmgd 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 bulbs are identical. Whmaw8wi mi/d 02ich bulb wilmmiiw8a/0 d w2l be the brightest?

  02.21: An ideal battery, an ideal ammtz7rw .hn8h0yva(on4eter, a switch and three resistors are connected as shown. With the switch open as shown in the 7wv. ny0 n8( zahht4rodiagram 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 ammb 2 7kvdk8.pqleter, a switch and three resistors are connected as shpkb.ld8qv 2 k7own. 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, an ideal ammeter, a swi9p1xnddq1bhw 4i0; tu tch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeternt1u1ib9w p ;d04d xhq reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?