16.09: In the circuit shown, an electric current exists in the metal resistry+ f9b.m(ptsp-0 xteor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the direct py09m+tp(.erbxs ft-ion of the electric field through the interior of the resistor?

  98.06: When any four resistors are cw- *m7nvmndp8 onnected in parallel, the_________each resistor is the same.p*mdm 87wv n-n

  06.33: A current through the thin filament wire of a lighz ,1alxvun;t: yei*4utbulb causes the filament to become white hot, while the larger wires connei*y z 4uunlt :x,1;aevcted to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are ;pmki;r(og -5 ovy 8dbbeing replaced with LEDs. LED is the acronym for which one of the folloob(yi-8g dr5k ;pv;mowing choices?

  05.16: A cylindrical graphite resistor has lengt )nv3s.3x fldqqwf18oh 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 the ratio of the new resistivity to the old r) 1 3fx.3q8flwqnovsdesistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same mateg-xynd/c iezgo(/ j/ 4rial. Wire II has twice the diametere-(dgi4 jg/nxz y/o /c and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the dsb -kw**mbbzo+pn1++ md3 hjg iameter and half the length of wire X. If wire X has a resistance of R tzhmjbkmo1*b 3+g+p*d s bn -+when wire Y would have a resistance of

  03.23: A cylindrical resistor has lengt* wi z;vo5l0sf/s* sq. tig9jmvd(wml.o4: noh L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to th5mqlgo o lf.i*jv:sn szw(wm ts. 0d;4v/i9o*e resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brii pzwn c*e dz20r9i6vo4c0 op;ghter 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 a giver 0p9e2cc6i*0ioz zp; nvowd4n voltage?

  16.07: Three cylindrical:8iw mqsm f:6 kt02ryfrz7e 0x resistors are made of the same material. The length and radius of ea:8zfs 20:rm70x6im rw y qketfch 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 /6 a/i7z vdivsbattery in the following way: “Two resistors are connected/a/isdi67zvv in 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 diagram has internef,p 4;e:owhkl,t3l ral resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:r,epllekw,;4to: fh 3

  97.37: Consider the compound circuit shown to the right. The three bh+fvvyl1 4 1a5 dcatwn+ek1,v ulbs 1, 2, and 3 - reprd1++1al vkcw4v fvhne 1a y,5tesented 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 circue k-z+dj (fi ,:e tfmj:n8ca1pit at the right. If the current in all three resistors is equal, which of the k,:ji1fefez n+d- m(p tj8ac:following statements must be true?

  99.37: The diagram at right represe04pi vn/e(r knnts a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cevnin0e( k4rp/ lls. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following state wpnj)c)ceyn2 5(:0bpluaz d- ments is NOT true concerning the simple circuit shown where resistors R1, R2 ancp )p- 0n:l z5e)(bjwa2ducy nd R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is bjpuc zt959 uy;righter than bulb Y. Assume all circuit elements are idzy u59t9p;juceal. 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 identifie9ca f41d)giyxd resistor in 5 secoca)1fyxd9 ig 4nds once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit hav 5sz0lb)7i ew q(2p2 gnrn.v72 ctmnrye the same resist g2yrp)7n rn22btnec(7sz50wqv im.lance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the cu* :)nudfp*oftm(h1lk rrent through the 6.0 Ω resistor is 1.0 A. What is the p n*do l)ufmhtp(: k*1fower supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connectedigr q42g8:llp in series to a battery. Suppose R1pi ll:2 grqg48 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel j0- , uoylrz8- f9xnnlto a battery. Suppose R1 has 2V acros nr8l0o-uy-9 ljf n,zxs it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rls ez49y +f2u3le; jitated 1200 watts and 120 volts. What is the maximum value of the curre4ujt+e;l 3fi29y es zlnt under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate aigi r(a.a +6dkt 120 .r+ga(6ikdi avolts?

  03.09: How much curre5l )mt6ex9 rvknt flows through a 4 ohm resistor that is dissipating 36 watts of power? kt6rmv95l)ex

  05.21: A household iron used toby2xw (cq+ l7(z 4bflx press clothes is marked "120 volt, 600 watt.” In normal ubzc bwy(lx+ 47fxlq (2se, the current in it is

  01.05: Which of the follwm0 eq*uh.3f0pc;4iv k d1avh owing resistances could NOT be produced by a circuit containing only tuq vhica;00* khf.mvepd314w hree identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following eqd 5c)uunmd8 v;uivalent resistances CANNOT be produced using alu8)dcmnu; v 5dl three resistors?

  02.06: Three resistors of p+.x q4eyj 6vd1szi p,different values can be connected together in different configurations. If all three resistors yxsj, pq6 4ie.zdv1+pare used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single f g9(lmrz3h,lresistor 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 connected in series using the same batte 3m9h,(gllr fzry? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connected in qt e-dbk-fha00wh 9v4 parallel, the equh- 9qtw v0ekfh 0ab4d-ivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has e3*tu+,*oo fp myttlqo2n k*f+w:b3i a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to waq t3emb yokf :n*+t*upw 2io+ ol*tf3,rm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 mnahe;/bu f7lol7 5 q-ohm resistor that is dissipating 36 watts of-;m75oa ehnbfl7 /q ul power?

  01.24: An electric heater draws 13 amperes of current when connected to 120 vol-efpv/t ;oat2*)ybcbtm w0g+ts. If the priatf )tt2po* ;g +mbcwv/e0 b-yce 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 100l :bb ew7tuk x(n,k2;vW lightbulb lit continuously for 1 year at a rate o( v,unx2bkl7tke;bw :f $0.10/(kW.hr) ?

  12.09: A constant current of 4.0n) 1ikk7brp z50 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of th)zk1n ibp r5k7e lightbulb?

  01.10: Each member of a family of six owns a co7bxmthe2 x f1wd;i6-2wj/. nf 0tnuyimputer rated at 500 watts in a 120 V circuit. If at7.f 2nh/imtnfy ew -6x1id ; 2bjw0uxll 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 connected to four resistors to form a simple circuit-low 7as5xz:y as shownl 5xo :-aswyz7 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 simple pyf8 5 y3;lw ,vzjzi):oz)vehcircuit as shownlp38:oz;hi,zvj)yevyw f) 5z 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 7. /8 oevrcnw,iti9sy ammeter, a switch and three resistors are connected as shown. With the swic/o7 r9ev.ni , ytisw8tch 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 thjwhun k08fm(0 5 j(as 0b :ya 4frut8thtbw)g3ree resistors are connected as shown. With the switch open as shown in the diagram the am:(gu0t )j fta40bw08 uhn5j3w8 yfa(btrm hs kmeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battep:vm0rtiz * /qry, an ideal ammeter, a switch and three resistors are connected as showitrqv/0 m z*:pn. 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 rightdtqz *n+ra 1w0, what is the equivalent resistance? Assume that all wires are ideal, the battery has no inteqrzn0*a 1+d twrnal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance o,meno hkp9+ q c,o5hf2f the circuit shown to the right with resistances5 , o29o+qfch,mpekhn $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistor a0/*n2;thr p fo1;rfdu x)uofs connected in a combination p*2 runtr ;df u)o 1/;fafx0ohseries and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistor p 2ao1jp.e5ffs connected in a combination s fao2.pje5 1fperies and 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 a dxcee36 z3ao3pqy48mcg 9 wu0re identical. Which bulb 8ze q3u 4cocpa30ymewg 96d3xwill be the brightest?

  02.21: An ideal battery, an ideal ammeter, a 1kbv2 ;zxk9opzmeu 4l* +qq-dswitch and three resistors are connected as shown. With the sob9kdeqm4z;2 1v+l* -qz xkupwitch 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 idealq283nw g,cisv x *7kv36mh yzr ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram32y3rski6w xv8 vzc m*hgqn,7 the ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal batte hrv1:yuh7v.c7s 1yyz ry, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammetuv7z y17.c hyv1:syhr er reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?