16.09: In the circuit shown, an electric current exists in th jbapzes/ o9gv3.s wf 4*jh:(ae metal resistor connected to the battery. Which one of the following choices best descrie:a zbvs 4*a h/f9.gjpswjo3 (bes 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 resistors are connected in pa4o)v;(jlz,)t rugzeys ,m(ne rallel, the_________each resistor iss;u)(zynr),ez ejol4g (,mvt the same.

  06.33: A current through the thin filagal3v+r 3d5 s(7at bsmment wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This3 +t5ld7a sbm 3gsv(ra happens because

  13.08: Some standard household lights are being replaced with LEDcrcme6mls )-y+*+:qqp umt: gn0j+ y ps. LED is the acronym for gr+pt+ yp m-* :)n u:qylmcj0ec+ s6qmwhich one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sec(e (vstsy3yidq a39.ptional 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 thea3 y si.td9 3q(sev(py old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same materiac+xb)k3v0e (g, hjzypl. Wire II has twice the diameter and twice the length of I. If I has resistanvegxjcb ,py0 z(k3) h+ce R, II has resistance

  99.31: Wire Y is made of the same materi2(x)p0 ye1snxe.9/ opnv qqjdal but has twice the diameter and half the length / 21 yonq p9nsq(.)0e edvjxpxof wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This p*mo2e( 4lit ew 4f8gmxiece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance(e4 4i fml2w*ge xto8m of this material because of this process?

  07.27: A junior Thomas Edison wants to make c; fymz04 xc(xs2j odgza565k;ggn*i a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modifiegx55yoz;z x(j*gdc 0if;mg24 sa k6cnd 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 le6m1 cqtlsv+stq-( of 1ngth and radius of each- l vs6+ctt1oqf1mqs( 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 resistafi 64q wk0/rf xcywn0)a m.rh.nce R, are connected to a battery in the following way: “Two resistors are connected 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 oafhy w.i6.4xcr mw) rqnf00/kf this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internal resistance8lgbaq2o80xj; 8 uth -rl fye( 10.0 kW and the ammeter has02xo(b8-ua; ljt lhgyerf8q 8 internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The thrfb 8pb91jey05qxv zf 4ee bulbs 1, 2, and 3 - rfeyq fvb9jpz4 8 1x50bepresented 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 at thev67 oje(t-,x vc:pn jl right. If the current in all three resistors is cn6 xe-tj:vpjlv(, 7o equal, which of the following statements must be true?

  99.37: The diagram at right represents iuffom4z s da4(( ,/qia simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which q (a(u,di4m/fisfzo 4bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concer-ppb* k-r :ows 3voy(xning the simple circuit:yw *3- opsvbk-or xp( shown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andYpjgb*zi up7g c6(),ad are connected in series to a battery. Bulb X is brightergb7dzp6p icg j),a u(* than bulb Y. Assume all circuit elements 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 coulots g+j-mrdjy3 .28eahz)ujhy3 n -kt 8mbs will pass through the identified resistor in 2a8e3.)yrj8 jztky nmhhsd- 3tu-+jg5 seconds once the circuit was closed?

  00.23: If all of the resistors in the following simple u. cqn, y-rb*ov3bd8qcircuit have the same resistance, which would dissipate the greates q,vdb-rn*b3.u 8qoyct power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 ftwtm*rwdq4:cal-* 2 Ω resistor is 1.0 A. What is the power supply voltag:*mfc *wdt-r2 twlq4ae V?

  97.27: Three resistors R1, R2, and R3 are connect k4-r2,qv,l5nccf cb zed in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.qczc52,l fn ,-b4kr vc0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected /rbcu6ab+ cn(i:(lisin parallel to a battery. Supposilbs+ 6c an/rcui((b:e R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is ratrd.n7v(d9 cggeq hx1; ed 1200 watts and 120 volts. What is the maximum value of the current under these condi7c1he;d r q.dx9(nggvtions?

  99.23: What is the resistance of a 60 watt lightbulb designed to opxk/hq.; we7 6w srni,5zws2aferate at 120 vols; zfr,kaw .wi s7nwh52e6/ xqts?

  03.09: How much current flows through a 4 ohm resistor that is dissipkot reniq,) c o:+r7:xating 36 wattx:ro+ :kiq nr7c,ote)s of power?

  05.21: A household iron used to press clothes is marked "120 volt,(2*:ad b jzug .xoy (yiafzv33 600 watt.” In noy3 a*fgu d z(aiyvz3j2(.bxo:rmal use, the current in it is

  01.05: Which of the followin1 -.ziqr l*dl: w9pmibrq17clg resistances could NOT be produced by a circuit containing orw iq1rd*.lzplil-7 m9: q 1cbnly three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the rykj:2 4xj8ddfollowing equivalent resistances CANNOT be produced using all thx4 82drkd yjj:ree resistors?

  02.06: Three resistors of different valuessxzga4gjp;1v(. iv6 a 6;pxma can be connected together in different configurations. If all three resistorsaga v;; 1vppx4.mi6 6zxs ajg( are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is qg z-(-ri0 nzo bd:8joconnected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n idebgz n-8-roqdjzo(i:0ntical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having x 8vn/ sslv5v1resistance R1 and R2, are connected in parallel, the equivale/nv851s s lvxvnt 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 haa;kal 3) 3 gre43g (;g )tfbitvlcqg4hs 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 oqa h3 r4 3v gtc)bg)k3g(il4g ;f;talef water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm /myy qsml- 0q/resistor that is dissipating 36 watt0qyqy/m/sm -ls of power?

  01.24: An electric heater draws 13 amperes of current when connected *jcgy r r2pu3wi(g*;t -wlnt3t43a ryto 120 volts. If u3(;prtl3 w ag3cn *ytgrt2- r4i*yjwthe 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 wog gsryeayl a.n*0 l(ocl1 )o50uld it cost to keep a 100W lightbulb lit continuously for 11sn 5.gy (cllga00 )oylaro*e year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb res zy)oyhy(:rkk f65a5d ults in a power of 24.0 W associated with the bulb. Which one of the following choicfhyaz ro5(6ky)5y: dkes best represents the resistance of the lightbulb?

  01.10: Each member of a family of six ow-id9z .qpx-0mudbc+ sns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circucuzms - +bxid9.-pd 0qit 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 fg9g (6ougo5 9ojvh.e jour resistors to form a simple circuit ag9e hju5v(9o. o jgog6s 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 circuit z0my w.qupw+4 as shown .0yw um p+qwz4to 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 area656ppv oetjcy4 bs,5x8mif; conne a6m556;,p scifjbye8xvpto4 cted 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 amme8l*y/am/lx6 l.2dv w re8fvszter, a switch and three resistors are connected as shown. Wit68/e 2 / xvas r*wyzflv8mll.dh 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 swgbr t*fpa 5/bs(.ax h4itch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. h (s *aa.pg4xbrb ft5/
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 equivalent resis,q -r2ngs*zs:i co8 smtance? Assume that all wire:gmz8c, qr osi* ns2s-s are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit 35d eacl(fkq.bvx7 j5 shown to the right with resistances k5a c. (3vlfj e7bxd5q$R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram be9yerhkkhj at1c(- 2jwy)y9:ylow shows five identical resistors connected in a combination series and parallel circuit to a voltag ktwajy9h9-ky: c1(er)yj2hye source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combiex t7yv+frrotz*yl434z z,k +nation series and parallel cirtxz *eyk t4+3zy4,zlr r7 +fovcuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the0uny-x g0:.xnzufbo;+.i. luglx2ml bulbs are identical. Which bulb will be the brightest? bu-no 2;xggllu 0x: 0.uz+i.xy. mlfn

  02.21: An ideal battery, an ideal ammeter,h1j3 fl+1mdj b a switch and three resistors are connected as shown. With the switch open as shown in the diagram the3 hfdm+jlb1j1 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 resistors are87;pnkoy x qp; connected as shown. With the switch open as shown in the d7k8oxny ;pq;piagram 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, pj4m; +e-w+cxqmxh ;sbd9c ;6m0ykc w a switch and three resistors are connected as shown. ybq;;6w0 wm+e9skc cc-+ 4mxdp;hj xm 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?