16.09: In the circuit shbrod(aoq.rpfl,x89 4 own, 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 xfor4r,l . 98 o(pqadbthe 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_______ou+zv-y 31fyr __each resistor is the s 31o yvy-rzu+fame.

  06.33: A current through the thin filament wire of wjs 9;ah eq/sg usz i8*j1:ya7a lightbulb causes the filament to become white hot, while the larger wires connect;zhs a eqayus s/*:jg7 i1jw98ed to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights ag f.zbm-) d:gare being replaced with LEDs. LED is the acronym for which one of the following chzfg g- ):.amdboices?

  05.16: A cylindrical graphite resistor has length 6vlk1(lon20q b 9aqeoL 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 the ratio of the new resist(v1nolb lao 9e2kqq 06ivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are mad3 ci aqspcjp:8); oel1e of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance R,3ci 8ce);pj pqosla:1 II has resistance

  99.31: Wire Y is made of the same mat1.tf:cku t 8auerial but has twice the diameter and half the length of wire X. If wire X has a resistance ofac8 k ttf:1u.u R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of wh4fxe2i 8t2z- *rtk omaterial is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this mat-khirw xef24zot8t* 2erial because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bul 5td95ytq1(u bpn i3vvb. He decides to modify the filament. How should the fil5vb v5nu (titp1 q93dyament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindricayaa7cs zlw6,aa8 :y- * b2bvwzl resistors are made of the same material. The length and radius of each resistywwza azlca,*aby s6v-:278b or 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 89xkoywfl g --resistance R, are connected to a battery in the following way: “Two resistors are connected ikf -loy89xgw- n 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 circuit diagrzy6 dur;v5u*r7 -xidtmeb2 j,am has internal resistance 10.0 kW and the ammet rz 2mxe7,i 6y;rtvb*5dujud -er 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 showf bewk u. dx6ui4*8(ewn to the right. The three bulbs 1, 2, and 3 - represed ibx(48*e 6 wwkuf.eunted 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 simplqra76 qen5qpis 4 /o2ftffu 3.e electrical circuit at the right. If the current in all three resistors is equal, which of u7i53sf6pq foqt. fe/ ar2q4n the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composekkemfd ;b1,pph, 1de:d of 5 identical light bulbs and 2 flashlight cells. Which ; pmdkhk1e,,e1d:fp b bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following state2f b ;ucpl(6hlments is NOT true concerning the simple circuit shown where resistplfu;lbch26( ors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a b/9d lmr()u 2cbc)nv qwattery. 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 tlwv d)cbu/9nrc2( mq)he same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will kxmy 1,i 6n16zr3ypiu pass through the identified resistor in 5 seconds ,6mry nz1u3 piyx 61ik once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit hava1j ht dd4 e;-+7qtdpke the same re d1eq4;t+a7tdj dph-ksistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagofn5) ic +za.mram, the current through the 6.0 Ω resistor is 1.aciz)on .f m+50 A. What is the power supply voltage V?

  97.27: Three resisto- m;c8 7havwu4l)fqlirs R1, R2, and R3 are connected in series 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. Whvlai;4w cqm u7)hfl8- at is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connect; 2-qq478e zn27gjmoc z adspued in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissia2 egj-c7q4q n8ozm; du2sz7p pates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and h3tpu).epgsu.:p6t s e8,ro x120 volts. What is the maximum value of the current under these conditions?) os8. p epru3 6usp:xtgt,e.h

  99.23: What is the resistance of a 60 wattprflpmq 0hnzr706gdr r ) r5pbu73*1o lightbulb designed to operate at 120 volt r rd qgo7u51zhm 6rp07nrf)*l3 brpp0s?

  03.09: How much current flows throu lu,64 rada)kbgh a 4 ohm resistor that is dissipating 36 watts of pow )ru lbdk4a6a,er?

  05.21: A household iron used to press clothes is marked "120 volt, 600+ bs xt3s*tmx5en -x2n watt.” In normal use, the current in it is3 bstn xn5+ms*x2tex-

  01.05: Which of the following resist 5/c7h :bsa3 )vrco:uo2fks e*1 gakwdances could NOT be produced by a circuit containing only three identical 6Ω re/5 u)fo1ev :ac gchbko 2d:sa7k3 rs*wsistors?

  94.37: You are given three 1.0 Ω d4lun)lq7, wxz/kj2wresistors. Which of the following equivalent resistances CANNOT be producelkn7z)l w/uq x,d2w4j d using all three resistors?

  02.06: Three resistors of gg q +-1gk.b p;7hcchsdifferent values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can begq- gsp;.bhh 1+ cgc7k produced?

  97.35: When a single resistor is connected to a battery, a total power P is diss6by xn5qrm.89wd td.k;1 zzx cipated in the circuit. How much tot5r.1.d xdnxz8k cqzb9t6;y w mal power is dissipated 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, amv: u0+x1j gkdre connected in parallel, the equivalent resistance of the combination is 5Ω . Which of thedx 1gm+ kuj:0v following statements about the resistances is correct?

  02.46: A hotplate is designed sucla *r4*s.;;r wvfn 8oeibjf0 x x/hd0zh 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 kg of waij.bhnrx0l drw0 *;*x ; foae8s/v4f zter from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current dghs0ad( 8x;0phrfz. flows through a 4 ohm resistor that is dissipating 36 watts of pohfa(rs;z8hpdd. 00 xgwer?

  01.24: An electric heate5q +s2 t elxmg,erxk76es(ju +r draws 13 amperes of current when connected to 120 volts. If the price ofe(u6mslx t,x+kq e esr gj752+ electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how muc).- gdhrpcpkzk 4zd32 h would it cost to keep a 100W lightbulb lit continuoudr k zzc42.-gk3dp)p hsly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb resul)zyzq c-01w 7k .ev ito6xo+w8+fvxaets in a power of 24.0 W associated with the bulb. Which one of the follzqa1.xv 0)f oezw67xi+ w+cvtey8ko-owing choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 5h l7v3rgh,5:zgn-ypm00 watts in a 120 V circuit. If all computers 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 sny h5rz g-plh7 vm3,g:ametime?

  03.16: A 9-volt battery is connected to four resistors to form a simtqgd,pb/(0)( grlkz (laa/ grple circuit as shown zbqt,gd k//r(p llrag(ag 0 )(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 to form a simplett ngj-j-g/ ir9nrg()8wv0v ip (6r bn circuit as shown to the righ9n nj8/ -vv6irtj)(trgrgb wp-in (0gt.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, an kzo3fq.2sh bt6qw2dd( ,0pf ih wx0q2ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter readsqk 3 (o,6ffbwiwpthq0 d2xhzq220d.s 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 *17q5dr. tlvz-2 f blmnp1vsd connected as shown. With the vfq z7dr*11l-5vtpb l2s.dm nswitch 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 switch and three wxcqwb.0f zqw9,5-0nxa wgxr zyi3 6(resistors are connected as shown. With the switch open as shown in the diagr 3(6qr-g znzwx ,9xicwy b 0wxqwf0a5.am 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 tueoc6/j xb(rfz :8 *rzhe right, what is the equivalent resistance? Assume that all wires are ideal, thee:xf* z(broujr /z 86c battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit bo-zq),n;hptuomb v 7sd87 s/ shown to the right with resistancesu mz-,b)v;s 7 hqstodp 78b/on $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identiev6j-hprb4 - wvp*2 uxcal resistors connected in a combination series and parallel circuit to a voltage souvrj* w6pveb4 pu -h-2xrce.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistd(xf v32xd; okors connected in a combination series and x;2k(3f dvdx oparallel 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 -xo )hv+5m laridentical. Which bulb wilr+o5hm)- avxl l be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch s4s2 ((hztspyp l/ 3ovand three resistors are connected as shown. With the switch open as sh(otp 23 slv/( spyshz4own 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 sg9ax1h2r q e302ofh xtwitch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter r39 a2xeo0hhfqr1 t xg2eads 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 switd 26 cbv3qjg.e ba-*ioch and three resistors are connected as shown. With the switch open as shown in the dia6*cvg.e -bq adji3b o2gram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?