16.09: In the circuit shown, an elect rg,1z )q2m8 6puwdfyuric 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 resistorrp21 uf y)dumw68 gq,z and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors arul4cr opa tb/6z)lztq43d0,ow j 2b0 de connected in parallel, the_________each resistor is the same.d z63t4 b q0wlpt o 4jz0,2orl/ac)bud

  06.33: A current through the thin filament wire of a lightbulb cam:ysvj) jew; .zcx 5b-unwe1-uses the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens becayvc 1s- e:) uejw-mjwb;n.5 zxuse

  13.08: Some standard househ b2ce34o : *36voovulpqh2bvjold lights are being replaced with LEDs. LED is the acronym for which one of the follo3oh32j4bv6lo vq pvu:* eocb2wing choices?

  05.16: A cylindrical graphite resistor has lengt3d8de5( pg :tgsr3wsoal7 .zv h 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 ne(r853 lgsspt3zd d v .oe7ga:ww 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 wire II are made of the same material. Wire II has twic /av(o9wq pn)gwn 0.koe the diameter and t0(wp.)nag o/qw kovn9wice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made ofkzk/0i/o * h5o mv;el6td7laz the same material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a rmvokaez ld0kiohtz; 6 l /5/*7esistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of maa xc 5uc82 xv.j4 tkw3d;cxay:terial is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this mvcd:twcx8yk2xcx aa34 ;ju.5aterial because of this process?

  07.27: A junior Thomas Edsqk 2t8k9hc: ,iszc0 rison wants to make a brighter light bulb. He decides to modify the filat 9ikch0s8, :2srq zckment. 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 resistors are made of the same material. The lengthp+/o d4(eim fkj9 h0n4mn8yyp and radius of each resistor i 4m o/fnm 40+yde pj8ki(9phyns:
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, eacnem1 7((ru emph of resistance R, are connected to a battery in the following way: “Two resistors are connected ( erenu 7m1p(min 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 ax ig57-ajl45ols :njq c z(f(uccompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading isi szl5 (u:gxal4co57jj -fnq ( 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to9 u f3k-3radsnz+s0a ix4pzf1 the right. The three bulbs 1, 2, and 3 - represented as resistors inf0afra+d-z nzx 9s 3pk4uis31 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. d2c z(xidw-phy/f.bm7 x-s5dIf the current in all three resistors is equal, which of the following statem- d75xhymxc.ib-w zdp d2 /sf(ents must be true?

  99.37: The diagram at right represents a simplw .qh5pa9xj,h4 btn0fe electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or buw p. nb ,h0j4qaxf9t5hlbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple circu76e kj;(o yy3ycnyi .iit shown where resistors R1, R2 and R3 are have eye yn.c6o73;k yjyi(iqual resistances?

  17.29: Two lightbulbs Xn46k 6h:/y -fhz(kh yp8xrzp m 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 eacr (6pnz:h-xkky/ 8mh46zhpyfh 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 in vj :lxh a pef(8p6yhngn 0+p/55 seco hv8l+(ghjxpn5ayepf/ 60 pn:nds once the circuit was closed?

  00.23: If all of the resistors in the following simq e,0 :lozx*iiple circuit have the same resistance, which would dissipate the greatestl:qi0 x, *ioze power?

  98.34: In the accompanying circuit diagram, th.2am9ns v js;; yin)vhe current through the 6.0 Ω resistor is 1.0 A. Wha ;ai.)vs; v9snjmh2ynt is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in serieuugvv/cx69a3fmj912wdoy f) m(fb ,as 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 theyad6fcu,) m2 f1o9m(u fwj x9vab3g/v voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected inu 2rxg,(k0ig l )g*zmkj5 ond( parallel to a battery. Suppose R1 has 2V across it, Rkj0 gmi gxn(l 5),*gr( ozu2kd2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 12iw m.le+zehy+uxp* .cn 9zqbb+ sj-( 200 watts and 120 volts. What is the maximum value of the current under e+i(+b b9+cnq2 zh. -xwzyuemjls*p. these conditions?

  99.23: What is the resistance of a 60 wa/ vt ufrhln :gh8+1k) rtdv:m/.v5p drtt lightbulb designed to operate at 120 vhu8n/d: vpdvhl rvm.t)k: gr15trf/+ olts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 3 *n3we(thx ;;digu4s l6 wat3x t;d(n;swue *4lhgi ts of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.” In0 k2vuxm.uo 9:, obsle normal use, the current in mus0:ube,. oxo l2 k9vit is

  01.05: Which of the following resistance9,f 3ot)y +tl t2vli)oify8pis could NOT be produced by a circuit containing only three identical 6Ω vitf ty)i+28y lpio,flo t3)9resistors?

  94.37: You are given thuhp +wp2 z mp 5jdk7gx:h.7u-cree 1.0 Ω resistors. Which of the following equivalent resistances CANNOT be:+ hpp 7uw7pch.2z- 5djx mkug produced using all three resistors?

  02.06: Three resistors of different values can be connected together in diffs..zhu ja/qzxoz*z 7k:)r1tfxq.- mnnm ,u.rerent configurations. If all three resistors are used in a circuit, how- n/q1.s*zzr :takhjz)fxx.. r,umo nqm.uz 7 many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a total powe t;po,rp 6zepxez-+ 6er P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors +pr, ; tpzoez6 p6exe-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, g cz l0)u7txn3are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is cor0g)t xz37cu nlrect?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when operatnm0-5 rae bwc)ing at 120 volts. What is the minimum amount of time that it would take tb0)w aemc 5rn-o 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 36 sa: qq::(rmot wattar(sq:mq ::o ts of power?

  01.24: An electric heater draws 13 amperes of current when connected to 120/pf nlq j1jjmdc: w2mgy jg),-j.l, 0xvhu/0r voltjjy/mcfgljdn :uvl1g2 ,w-.qxp0m0hj/j,r ) s. If the price of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much e bi-2e)u,yyl would it cost to keep a 100W lightbulb lit continuousby-y l i)e,e2uly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant cuza:o g9n-a,3dduxyn +rrent of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following cho- : uoda9d,x3+nnyazgices best represents the resistance of the lightbulb?

  01.10: Each member of a famim q8b.f4)y+w hlb(xkuly 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 fuse, what is the maximum number of the computers can be operating at+xb4k( h.f8q) wulymb the sametime?

  03.16: A 9-volt batterylj; fc6:wvfd9 is connected to four resistors to form a simple circuit as shown to the right. ff:dv c6l9j;w
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 simple h 7im2tg4mjd8/w+ s chcircuit as shown t4h/ jc2h 8+7wimg smdto 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 c6 k7bxxs/nc m)onnected as shown. With the switch open as shown in the diagrbcmx )7nxk/ 6sam 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 snkregud;am t-9kc eogj7m+ :;v (:xg*witch and three resistors are connected as shown. With the switch openn t *(gro+g7x:ge-e; vdck k9; am:mju 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 inrc.6lx )o;a. n7yn xcdeal ammeter, a switch and three resistors are connected as shown.ncnn;.y rx)oa6 7cx.l 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 right, what is the l5b20b t hhc-ym,b j6jequivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identiclhj0j b, 6bh2y 5mbt-cal resistance R.

  09.07: The equivalent resistance of the circuit shown to the rl3en5ho x2p,h(mrc p4 :kop*wight with resistanc kp23n(4wo*,e mhxph: o5lc rpes $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors-0kdbj48g drp connected in a combination series and parallel circuit to a voltak0-84j pbddr gge source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistorsdryq 0e3 p q2e7l*e8)qm,g yxy connected in a combination series and parale8d p0) x,3ryqe7ygm*2ql yqelel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of ;z2jdcio+ kka2f7ueup( l2 kqg0u/2j the bulbs are identical. Which bulb will be2(; +k0 ozukl2jkd/quaij 2epf g 2u7c the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are connofw* t kp o.8z1+oapg7du3c9r ected as shown. With the switch open as shown in the diagram the ammeter reads 2.dgt a uwo c31f9p8orzok7.+ *p0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ammetn0h bh+p- 3ndg3- cajrer, a switch and three resistors are connected as shown. With the snh rh -3cdn30ga+-pjbwitch 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 9akyjyuh 4py3i e5 +m0ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amp5yku+p4 yejh39m0ai y eres.
When the switch is closed, what would be the current in the circuit?