16.09: In the circuit shown, an electric current exists in the metal resistorb x v7ri/ h(g;8s(czdj connected to the battery. Which one of the following choices best describes the direction of elsr( c8(xv/dig hz b;j7ectron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors arem.8puq jc(k)l0 uzn1k d3 m9zl connected in parallel, the_________each resistor is the s1(.zdzq puuclm k ) nlj9380mkame.

  06.33: A current through the thin filament wire of a lightbulb casjav7cysda v)+z .f ,*uses the filament to become white hot,vdav+f., a)scys* j 7z while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs.tk, ftq4+:nqy LED is the acronym for which one of the follftnq4 t:+q k,yowing choices?

  05.16: A cylindrical graphite resistor has length L and cr6) yc wrki4fj+oss-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 of the cylinjfw yk46 )rc+idrical resistor?

  98.20: Wire I and wire II are made of the same material. Wiregzhg0j b,(1 ie II has twice the diameter and twice the length o(,jh0z bgei 1gf I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diaggmc 4 (llh,//3iagqcmeter and half the length of wire X. If wire X has a resistance of R then wire Y woulmall3g(c 4 /h/,gciqgd have a resistance of

  03.23: A cylindrical resistor has length *,7st sob*fdyaahg/* L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to th/fgb da,s7 so*t**ya he resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. udo7v5 uznf-g/bzn 7* He decides to modify the filament. Hod7uno-fv n*5uz b/7g zw 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. Th5)8jci9r wp u.l(7 vkuuvk5 xoe length and r7prxk.5v w uu 5k)89cou(jivl adius 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 connected to a battery in mo xp4c 6zo7wxr0lp.5the following way: “Two resistors are connected in series. This combination of two resistors is connected xp4 ol 6xc .0prowm5z7in 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 accompanyingvmt9n, d;yu ;c i3le7ct cr.g( circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. Tgttve ;;c c73dy 9 ln,iru.c(mhe voltmeter reading is most nearly:

  97.37: Consider the co 4i2d r(0itxzkmpound circuit shown to the right. The three bulbs 1, 2, and 3 - represent di 4k2iz(tr0xed 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 electrical circuit)a q:nuq6t9v t at the right. If the current in all three resistors is equal, which of the following statvqnt)9 t a:u6qements must be true?

  99.37: The diagram at righ-o;(fqeq+f, n djnwgxha :+v *t represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells.(,vqh+xeq: ;+awnn-j f *godf Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the fou *ue*b6 enn*n9ud o2ollowing statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are ue2nn*9 ubo*enud6*o have equal resistances?

  17.29: Two lightbulbs X andY are connected in serienu;,t-wdz w9tdtc o ,(g1w q ej47cj*8btpq,es to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected ;,(tj7*cw wzubd 4 dop,9,qqnw-ce81tt t gjein 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 x,3 raq,8odd/dlh9 2 *lbo4x bkxmki.pass through the identified resistor in 5 seconds once the circuit was closek 2q ho48bmxx3d bd ,il,kdra9*/l.xod?

  00.23: If all of the resistors in the followlhezt *e 8*5eding simple circuit have the same resistance, which would dissipate th*5e 8ldzehte*e greatest power?

  98.34: In the accompanying circuit 1 ;ks2jhhffb40fw6fq diagram, the current through the 6.0 Ω resistor is 1.ff26wk bs14 ;h qfj0fh0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2,:n- ma d2m.s4+d z:ls gdm+:es :blcnv 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 powdav.me+c2nsd sszmlmg ::l4:d b +:n-er. What is the voltage across R3?

  99.40: Three differen0ooxg.ay3f e7e2z 4uyt resistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across 3.a7eyzo xoe0u gy42f it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 2fikg /nz 0nr(2ivt +ep/e/p gvolts. What is the maximum value of the current under thizfn0nee(r/vpgp k/2g 2i+/tese conditions?

  99.23: What is the resistance of a 60 watt li. xao vyax4t4,ghtbulb designed to operate at 120 voltsv,a 4otyx x.a4?

  03.09: How much current flows through a 4 ohm resistor thatwubdr :fd8xtg65g z)6x 33fn dkhv;*t is dissipating 36 watts of w8: bxd36 htgn;fr56d g*xuvk)f 3dt zpower?

  05.21: A household iron used to press clothes is marked "120 volt,(c qp9 pzh+sr-5z8 s7e;g vtpd 600 watt.” In normal use, the curren 9hz7t8sre pp;d(g qvs5c+-zpt in it is

  01.05: Which of the following resista g02)ofz2 3xv :v:ofdz9yorxtnces could NOT be produced by a circuit containing only three identical 6Ω rrz2f3vxxy) v 2zo90dtogo ::fesistors?

  94.37: You are given three 1.0 Ω resistv0 ff3 zyxpqv9 jcx.jz (zr157ors. Which of the following equivalent res f x3jpzz7q1vvx. f zy50rj(c9istances CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connect5)dlj 7qd pscc.5lt wf:1byi +ed together in different configurations. If all threfd5j bid.wlcy l+t75qs:p1 c)e resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connnjoixjbp*3fxqq xz9*lx4js1c0. - a2ected 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 connected in seriesonx3 pj z*i j*f9l-bxjxs 0c1x.q42qa using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 any l(5ku(6g lxhd R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which ofxlh(ky ul5( g6 the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resista .*9ukq4w +dt0ashxa wnce of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg of water fro*x+h0q swu.w dkt4a9am $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 wajk vr)mw)cbn-g9 8ankck/ ev8 n7n54otts o 9nacrnne78/o kcg8v)v5 jm)nkk4wb- f power?

  01.24: An electric heater dry d+aa(mjtht1cmj(m8w n )f2, aws 13 amperes of current when connected to 120 volts. If the price of elecfn,m dmt1j+aychw8at( )j 2m(tricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much486i)p9rkje pyly .fd xr/ mq1 would it cost to keep a 100W lightbulb lit continuously fopk9i) 4 xyprlrm /edy18.6qfjr 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A jzg9j3s 8 p9n6yrrts: through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of thez98jrt6r 9ysgpj: n3s following choices best represents the resistance of the lightbulb?

  01.10: Each member of a jzq w5:c-+ou ffamily of six owns a computer rated at 500 watts in a 120jq5wzofc-u :+ 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 sametime?

  03.16: A 9-volt battery is f( 6bfiqpypo5i) d o)/connected to four resistors to form a simple circuit as shown to 6o)5 foy)d ifp/pbi(qthe 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 simple ci ruug.v5p,-/o wq ,cuqihw0 i2rcuit as shown to theih0,ro, w-gp uu /iu2c.wv 5qq 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 a;) v srs0rm;amre connected as shown. With the switch open as shown in the diagram the amavm; srs)r0; mmeter 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 res9c91z 0nm y3nh w,e7l/ zbqyrsistors are connected as shownnm7ezcy1 /90 by,qrz3l n shw9. 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 switch and three resist/bd3,lt+f ke ( n)xmmwors are connected as shown. With the switch opm ,dxb(tme+w3fl/ )knen 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 thr6itm:1 ypi(he equivalent resistance? Assume that all wires are ideal, the (ii:yrm p1th6battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent res gn1y r.t6/-mw *bl*wsodit o5+an5bmistance of the circuit shown to the right with resistang1sa /ybd * irl5o6+o t-5wtnnwm m*.bces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five id8e2p q2 git ccdkep;64x sry9-entical resistors connected in a combination series and parallel circuit tqe-d r4 k cytp22;ipg9x8cse6o a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fivemwusls1w)kk :7 uj (7x identical resistors connected in a combination series and parallel circuit to a voltages7 x (m:l1)s7ukww jku source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identica xc)(ra+z ;bg4ciny0 al. Which bulc ;gzicnay )0x+br a(4b will be the brightest?

  02.21: An ideal battvt8 t/3rlmn v( b.or5uery, an ideal ammeter, a switch and three resistors are conne /3.n v(otbr5umvrlt 8cted as shown. With the switch open as 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 thrbm i +9tazzi(9xl+3v ree resistors are connected as shown. With the switch open as s+( a39xiritm z+vz b9lhown 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 are conndq:2pw9 v )x7 (6ulygbxhrr7j ected as shown. With th q6uhxyd:wxrjrv) ( 2gb77l9pe 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?