16.09: In the circuit shown, an electric current exists in the met8 j ;xk e/pie.wdkf:e6al resistor connected to the8fp/xw .6 ek; dj:ekie battery. Which one of the following choices best describes the direction of electron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four ri/8 bc/zt54f lwo6lafk (a8supi ex4 2esistors are connected in parallel, the_________each resistor is the samt 48el f af /l8o5xbpzw6ak2ci u/si4(e.

  06.33: A current through th ;jw/2 olo1bdce thin filament wire of a lightbulb causes the filament to become white hot, wolbd;/21 wcojhile the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. Lkon1 m(chwcc ,a0fi 4f+v4 1a-bmv2 vaED is the acronym for which one of the following chovw(acf - bc2+cmin a01v,f a4h14kvm oices?

  05.16: A cylindrical graphite resistor has length L and cross-sectionalit tftb0aiur:c +tt/x1xd 156tn56 eu area A. It is to be placed into t1 unt6x 0xd f5 a1ebui/tti:56tctr +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 cylindrical resistor?

  98.20: Wire I and wire II are made of the same materiaywugl58 pp9 pq(mt: b8l. Wire II has twice the diameter and twice the length of I. If I has resistance R, II hwug8 t8 5:yq9p(pm lbpas resistance

  99.31: Wire Y is made of the same material but has twice the diamete5bsqvg. r08i kb9nvz g5ypu3,r and half the length of wire X. If wire X has a resistance of R then wire Y would have a resistance of8gv. gyz 59,u ikrb30nq5 vpsb

  03.23: A cylindrical resistor has qwc*:) 8r nfjrk1nzcr ,)a, cylength L and radius r. This piece of material is then drawn so that it is a cylinder with new rrj)yw c)c:1fz nk,qrc,8na *length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Ed-(syr ucbz 1 xj;8ed/iison wants to make a brighter light bulb. He decides to modify tc/yeid-(rz8 ubs1 jx;he filament. 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 madx g+jm enc+i1ma -r5e0e of the same material. The length and radius of each resistor is:m+er1m +e-5agij 0xnc
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 ;ks t9x7 hly .:u*lbjdin the following way: “Two resistors are connecte9bkj7*.; d: stlxhluy d 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 bb3yz( 8mn5j+5v 8cpk.byy duaccompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistanc v3p b jyyu8.k5myd+5bn8 (bzce 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shownp/y7(cspoea bep6 j rm2pn071 to the right. The three bulbs 1, 2, and 3 - represented as 7e7b10(2jppp m6e sn oapry/c 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 cir cy x0b3x8mns+cuit at the right. If the current in all three resistorx y30xs8+m cbns is equal, which of the following statements must be true?

  99.37: The diagram at right representsqo ct ln-/wh9e49s5qia- ( myh a simple electric circuit composed of 5 identicalm/q( tsl94-i yhho9a c5 n-qew light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simpler bm h1 -vjr.7g ba./ck8+stto circuit shown where rest- /7oj.+var 1s 8rhktbbmc. gistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are cdpkw+55t8fg lonnected in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit eld +g f5k5wtp8lements 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 resistor43wz alr3z9eet -lyj; in 5 seconds once t -3lyez zljw3a9te r;4he circuit was closed?

  00.23: If all of the resistors in the folloe.; ,5,h 3mcpp hledwcj i/:mywing simple circuit have the same resistance, which would dissipate the greatest pow;yd: jhp/eme, h wmlc.p c5i3,er?

  98.34: In the accompanying circuit diagram, w. ucs3w;2zfz the current through the 6.0 Ω resisu. wzs2z; 3fcwtor is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a b+apdkz nje1+s(.d zq51bcp7a attery. 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 the voltage across7a1+j (deb+az.sdqpnp5kc 1 z R3?

  99.40: Three different resistors R1, R2 andR3 are connected in paralvhh2(c ouvnx4a 8f7:y(sy6qve)ckvx x f-2v 6lel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. hc8xcx 2vv-4 )u:6(kfn v(xoq7 va 26vseyfyhWhat is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. Wha*5d2r u vh. wofnt:n0l7z0u jft is the maximum value of thtn f r0*u2fhu 0lowdn7:z5. jve current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate 4f6fuel dcx3 vgb/hmfe +h2u33; uuh6at 120 voltuuhu+efdhhb/e23 ;4gx um 6fv3fl6c 3s?

  03.09: How much current flowsja(oy.g*l l-s8kno,bx 9w4db through a 4 ohm resistor that is dissipating 36 wao98g,o4w ybd-l(k* blsxa nj.tts of power?

  05.21: A household iron qu/06 setlp1cd4gsw , used to press clothes is marked "120 volt, 600 watt.” In normal use, the 6wctdguq0 sp,4 s1 e/lcurrent in it is

  01.05: Which of the following resistances could NOT be produced b )nfto:,i4hn by a circuit containing only three identical 6Ω resistors?)hitn, bn:4 fo

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalentwul .iybw*+j9lx)2s c ep.zg1 resistances CANNOT be pro jz*p+1) 2y sx9icu.lgw. welbduced using all three resistors?

  02.06: Three resistors of yz 37h fl29kpjl m9o/52 za:swnj wus+am*9nr different values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance caalsn r*2 w swph9my:z3 noz7+la5fm u2j9/jk9 n be produced?

  97.35: When a single resistor is connected to a batty/tjz wk p8m0/ery, 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 bp wt/k8mz0yj/ attery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are conne6ysbm 0aum-qbz*z0 0hgh j0b) cted in parallel, the equivalent resistance of the combination is 5Ω . Wj)y -mu *bg hqz0z s00b6hbma0hich of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it hskslt 0 ows7 4j,3gf;+krpw/ bas a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to w7s34gt rkb ,s+ sk;w/l0of jpwarm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 p( +8 cll:a(bzvp:vadohm resistor that is dissipating 36 watts (pl:d(8vl :vc+za pbaof power?

  01.24: An electric heater drm wc e/nk.icaz1v k+7;aws 13 amperes of current when connected to 120 voltmcz k/k.7e1ni aw c+v;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 would it cost t t/8fx2caek( f fpfs(;m f7ji8o keep a 100W lightbulb lit continuously for 1 yeaf/ ff8;ft 87e(i fxjck2apms( r at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results :mmz7oabx r6 - os.bjwc-d3d3ws6)uwin a power of 24.0 W associatedjaz rbd-ox3)3sm.6wm:c6b7swud-ow with the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 50 y xydm t4rt25r5sg(v+0 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the maxt xr s+ (t4grdmy5vy25imum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistb6 4k g5abn a;p4mpkaglbzei(0 +m;-wors to form a simple circuit a a( 4bbki+-gbn6pgw5;0 ze;k mmpa l4as shown 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 ciu 2*b6z)amdseu seujl.4ha,zo5bv ) 6 rcuit 5b4she2lmuo,zu6dabu z6v ) *e )j.sa as shown 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 az/ls/3,qj)1j ibem jand three resistors are connected as shown. With the switch open as shown in the diagram t zejj,is/3m1 )q a/bjlhe 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, anvd:bgn3y1)ebnq - s.;em0esl *u+rs b ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the dileuqgb ;v:b dme1sn3)+ r*.y snbes-0agram 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 n/-8::wke8n d mnobo,7erxwu are connected as shown. With the e:obkn d - 7num:o8,e/8wrwnx 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 siv08ua8t7twj 09io dkhown to the right, what is the equivalent resistance? jk8o7idi0t8 at u0vw9 Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of t i4yef2+fczsi8 j(*gghe circuit shown to the right with resistanc (yi2fj+ gfi4sz g8*eces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combinatiiy zpi vmr8-0)uo:,:bwe26bh q bwy;won series and parallel circuit 6zq ivo:h , :;bpw)wb0ub8 -yyrm2i ewto a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below -dnk5/mhzgg4rna.n+ - b8via shows five identical resistors connected in a combination series and parallel circuit to a voltage sourha-5 8mgi/-rn.nza+vd4k bgn ce.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all o8j;nq pv lf0m6*ef+rk f the bulbs are identical. Which bulb 0rvfn8 ;6plmq+j*ekfwill be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch a;1* h6/eltkn ze yk02p now+nxnd three resistors are connected as shown. With the swwen ny1lk+t ;xhkp* 2 6ozn/0eitch 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 three rem,tt y/2( 5 6yrqijr xv,mqdd(sistors are connected as shown. With the switch open as shown in the diagram the ammettyjrxv,dm(d/yq65,mrqi (t 2er 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 s1 ,ohj)cja+ xswitch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter readsjs+)ajx 1,co h 2.0 amperes.
When the switch is closed, what would be the current in the circuit?