16.09: In the circuit stp( f ppl16zdn x r::/)zd91xkick6jlhown, an 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 dirck l1 r1: )dpl/z:p9 jz6tfixpknxd6(ection of the electric field through the interior of the resistor?

  98.06: When any four resis mtzmwzn.93.b eh8bvng -m *u4tors are connected in parallel, the_________each resistor is t-m bwhmgv*4zztmn8u3 9b e ..nhe same.

  06.33: A current through the thin filament wire of a lightbulb causes drbj.wf ,-c9xthe filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happensrc-d9, .xbfjw because

  13.08: Some standard household lights are being replaced with LEDs. LEDb/uke qi-:)z m is the acronym for which one ozk:iu ) /b-emqf the following choices?

  05.16: A cylindrical gw:swp1(9 lqn-;b;t jeqh*v fk raphite resistor 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 length is 1/2 L. What is w p(s :9wfen;*;h1v qlqjt-b kthe ratio of the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of thegig*qvj5dykd04y*h/a m9 wq3 same material. Wire II has twice the diameter and twice the length of I. I90wyq4kd5 hqv gmj y*dig*/a3f I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter and half t+p snpz3en pf dn rs,n ;eh2a-(x3wb)1he length of wire X. If ben -r awn n3hpxs1 (n;d+psz3)fep2,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 piy-vigk+ wfo kvyzzuy k* :y3234/4sstece of material is then drawn so that it is a cylinder with new length 2L. What happens t fu4g+k3:4/ ksv3 k ys2z*-tvyzi ywoyo the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a b +a lh* eij/dophw*3u1ugu +w4righter light 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 at 4**aj/po1 wiuedlu +hg3 +wuha given voltage?

  16.07: Three cylindrical resistors are made of th2)vuez)kb4ui9r znu 7e same material. The length and radius )rn4)u uku97ezvbiz 2of 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 conne8zh7,re0h u3 zvdj .iac(9eh vcted 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 9ev7 u0.,8hhzijze ( 3a dvhcrthree 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 acc 8fz xsi0qcv(5ompanying 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 is mos(xf 85svqzc0i t nearly:

  97.37: Consider the compound circuit shown to the rigqlw/td/b 1h4zht. The three bulbs 1, 2, and 3 - represented as resistqzh/ldt4b/w 1ors 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 curr73eze4i fyt q0ent in all three resistors is equal, which ofy70 z3ifqe4et the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit cz+;1hftyh0 d.yd:/uj ma+ b esomposed of 5 identical light bulbum0aty+1yj /;bzd . deh+ hfs:s and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the follo-nxks-rjyk+ 4: t8 dnygn3 my(wing statements is NOT true concerning the simple circuit shown where resistors R1, R2 and3g:-nkyxty-s n 4my (krd+8jn R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a baso;y mbg-92,z 4 rnmk l6cbs8rttery. Bulb X is brighter than bulb Y. Assume all circuit 4kn byb r;lcrmm-gsz296o 8s ,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 represents what is observed?

  06.34: How many coulombs will pass through the identified resistor iepd-bt; 5 wgm bar51,nn 5 seconds once thmwn;d b515b agpe tr-,e circuit was closed?

  00.23: If all of the resistors in the following simple circuit have the yn ),e,ks b9tb7b) pxnsame resistbneyp,7 ts) b9),x bknance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.04y g0 e(nuss*8d sh8uc Ω resistor is 1.0 A. What is the powechnus u yg84s0(s8de*r supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in ser7qk.r;mb euc6 ies 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. km . 7qucre;b6What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3l8gf yauzx5m: 4:mt 8y are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. axyl5m4gtf y z :mu88:What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is the maximumcgmf92 4ppw .v va4. cvp2 9wmpfglue of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb/0i5 dl7t itoh designed to operate at 120 volt li/0ti5 hod7ts?

  03.09: How much current flows through a 4 ccw1 m-*z+2 iiurhy;w ohm resistor that is dissipating 36 watts of poweiy;i2 1wwmc +ru-chz*r?

  05.21: A household iron used to press clothes is marken,/b,phm79ko:p flv qd "120 volt, 600 watt.” In normal use, the current in itb ml/ vfnkp,9oq:p7,h is

  01.05: Which of the following resistances could NOT beh-y amw2ket8b;v77 g y produced by a circuit containing only three identical 6Ω resish7gvt7bmy; aky-e2 8wtors?

  94.37: You are given three 1.0 Ω resistors. fmg75ux 60url Which of the following equivalent resistances CANNOT be produced using all three rflu6ux5g 0r m7esistors?

  02.06: Three resistors of oq9 eqiki(l+)7 *jbuu different values can be connected together in different configurations. If all three resiuqo(il9q7+i eu)j b* kstors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a to5k 1hw/: sf0fw45 s,otdgascltal 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 resistance of the batteflfss5hw c o5,g1/0sa:d wt k4ry is zero.

  96.16: When two resistors, havinl7ckwmcow41g8* i/ svg resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the followingc/7ww vog4l18* im kcs statements about the resistances is correct?

  02.46: A hotplate is desig-wd6y.k:jklm yhi ;i qyac5; ,ned such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 khjk ,;m;cqylwy. 5yd :aii-6kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flocpc;e/pc 9aq -ws through a 4 ohm resistor that is dissipating 36 watts of poweqc9p-c a;pce /r?

  01.24: An electric heater draws 13 amperes of current when connected to 16/kbz;v,q d xis 8vfy;20 volts. If the prv fq;b6is vdzx,/k;y 8ice 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 fgdlx447/zgksa9 )todp0x* a 100W lightbulb lit continuously for 1 year 9soaa* dx7/d fxk40z 4tp)ggl at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A ty 3*rz77tbn4*jg sied hrough a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the fire*z3jyds *tnb 774gollowing choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts in a6i qx8ou3r,vne1k to 7g-jv n7 120 V circuit. If all computers are plugged into a sing7g1-vkv8e7onqn iu rotx63j, le 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 resistors tolb-)i euogv7( form a simple circuit as shown to thob-)v 7uie(gl e 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 resio;u d7xwk1x1up d(x ipnc);p* stors to form a simple circuit as shouko p1(p;x*c xu dx)d;ip17nwwn 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 con/c5;3w id-xjf6 v fogu9ss6 xonected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. s -wxoci3;6f5djfu gox9/sv6
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an3 wo5zwlbm s1) ideal ammeter, a switch and three resistors are connected as shown. With the switch open w1bloms53w z) 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 l y i)yyrm1b63ammeter, a switch and three resistors are connected as shown. With the switch open1y)l 63ymyrib 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 ly16s* ; aoovrthe right, what is the equivalent resistance? Assume that all wires are ide;ry6*l sov 1oaal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to ai1e z2/od ,rh the right with resi2,i dra1z oh/estances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected d5 x 35(61ywimzyeppmin a combination series and parallel circuit to mp1eywzim5 x5y(pd36 a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistoco 7/mmenq8 .a3vhbi: zb j2w2rs connected in a combination series and parallel circu2.2bj oem m w ah3nci:vq7zb8/it to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of g umudzj:/4t4 the bulbs are identical. Which bulbgd4jtuz m/:4u will be the brightest?

  02.21: An ideal battery, an ideal am1 b99fqygdk -6rapp0dlc iiz. w6p3i 4meter, a switch and three resistors are connected as shown. With the switch open as shown in t -l3 .p 0pibipf4c9d 6iyr16qadwk9z ghe 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 ammetuf+p l; kb81laer, a switch and three resistors are connected as shown. With the switch oa+8fp1 ullb;kpen 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 switch and three resistors arei mn4zjkm:v8 k x/,;dw connected as shown. With the switch open as shown in the diagr,nm;d4jwkk/ :zmx 8viam the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?