16.09: In the circuit shown, an electric current exists in the metal r n8rs;i pu69toesistor connected to the 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 ort69nsi 8up;the resistor?

  98.06: When any four resistors are connected in parallel, the_________each rn8uuso(5rx e*oynq 2*esistor is the su*s qy n*( xoru8en2o5ame.

  06.33: A current through the thin filament wire of a lightbulb causes-8:9gs k5 fli.s -uh2gnvyakcwt i:h: the filament to become white hot, while the larger wires connected to thghwv5at k: c ng u.:hs92-fi-y8k:s ile lightbulb remain much cooler. This happens because

  13.08: Some standard househ/u .khhlv,ge3 awly1fz9 e0w8old lights are being replaced with LEDs. LED is the acronym for which one of the following choi8.zh30,a 1 lkfglwv9yue /wheces?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area n m3s971hm3r s08xk, xttc7tk csfnlu- 4vv h6A. 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 resistiv x738hv4c c tmrs 3-tvu0kn7 f kn,6h9tsm1lxsity of the cylindrical resistor?

  98.20: Wire I and wire II a,h6rftrm aqinf; i1o*jl,-nn81n .j o re made of the same material. Wire II has twice the diameter and twice the length ofr*-rn ,8at h 1noof,j1fmj.n6 i;ql in I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twbyka,rjb7o -k1h5+ rcx4qincsug26v) - oy5mice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a resvbh - 5 nk 6cqu)21 7g+ocy 5ykoim,jrrxas-b4istance of

  03.23: A cylindrical resistor has length L and radilql750z1 t fnous r. This piece of material is then drawn so that it is a cylinder with new length1z qt7flon 05l 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brightey br;4ee/zs6er light bulb. He decides to modify the filament. How should the filamen /eb ;zyse64ret of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindryk2l1.m f8cb gical resistors are made of the same material. The length and radius of each .gm8b12 ylkfc 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 pd 4 qk931bvorjqs1 ,-ig7 pxta battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a th ,b p4r-o9kjpv71g 1qdsqxit3ird 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 accompanr1,/gpnm( z ;ju( mgsfying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistancefsm1rgnz g u( ;j(p,/m 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to )h-cs*4 folk 9k dl6srthe right. The three bulbs 1, 2, and 3 - represenfrk4klsl *csod9h 6- )ted 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 the right. If 9y1px3i1 fv x6)dda( ffj/rj u9ve l+kthe current in all three resistorfvj3)v1x9 1 jfefy 6x9d+ p( i/kdlraus is equal, which of the following statements must be true?

  99.37: The diagram at right represents a sv1d m7dvnx g (7rr3z1dimple electric circuit composed of 5 identical light bulbs and xgvd1m 7vnr1d 3d7z(r2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following si wz 9wej15e6pfx07zn tatements is NOT true concerning the simple circuit shown where reszj67w9ip0xn1 zfe ew 5istors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in seriesosp6m0ywo6hpx c0 (g6 to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connymp 6 chwoogxs6( 00p6ected 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 thesc(p .gni:xg 8ub) fu 24)xblb identified resistor in 5 seconds once the cirbu)cilgf 2)xb.n: sg8ub(px 4cuit was closed?

  00.23: If all of the resistors in th(tugs/f q)9nse following simple circuit have the same resistance, which would dissipate thug/9t(fn sq)s e greatest power?

  98.34: In the accompanying circuit diagram, the curreno o674n7/j us3jxut(ukcfy g, t through the 6.0 Ω resistor is 1.0 A. What is the po o3j,xu4 n uus7cjtkgf 6/7(oywer supply voltage V?

  97.27: Three resistors R1, R2, and7 / zaqpo) njqqb7-en: 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 o-q/ zj:ben7an)7qqp of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are conns .wbcv: fyw.8ected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current iwbcs y.v8 :fw.n R3?

  99.13: A heating coil is a0vco 9)ii 6 kmdo icm(r5btzx0)95ofrated 1200 watts and 120 volts. What is the maximum value of the current under these conditions5o 090x tmo b6()drc)ivoa9mkzc5 ifi ?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at ucoj k 60dd0rcnzoif7;s(+9lc*bw8b 120 volts? 0fd6 owczbcdu +i(sjkbl*9c8or7 n;0

  03.09: How much current flows through a 4 ohm resistor that is dissipating.2 wmr gnmu1d1k 40qfj 36 watts of 1du0nm1j4fgq .m w r2kpower?

  05.21: A household iron use;mo;u xd/-+v2( b ywhup: bvnbd to press clothes is marked "120 volt, 600 watt.” In normal use, the current in it i;-b+ybw u(o v udv2:nph ;x/mbs

  01.05: Which of the following reso+ahl ;)s1ihl istances could NOT be produced by a circuit containing only three identical 6Ω resistors?);a h +hs1illo

  94.37: You are given three 1.0 Ω resistors. Which of the foll*vsjz(qr9dh/ac2 ohg7l own3.j )8faowing equivalent resistances CANNOT be produced using all three resistoz.dh wj )(g 9f73s/nlha8a2ooj*qcvr rs?

  02.06: Three resistors of differenvd v9ll6 )fs/rt values can be connected together in different configurations. If all three resistors arrfv 69l/)sl dve used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connectedl59o+ i 8:3aklpxbr pz to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistbppx aiz 98kr:l l3+5oors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, haok b2,6/kepzadj6 ctp1.f03w mkg1 ouving resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the fo /b01 uo3w6,kjkc1 kp2a6odtmg.pefzllowing statements about the resistances is correct?

  02.46: A hotplate is designed such that *e /jm )qhry 7p 2m85i hf4dzff0lfz;jit has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to way ff 7*5m ;z ljim4e2jpfq8)fz0/ drhhrm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 b spdje92 3z4fohm resistor that is dissipating 36 wattszd9bfp 4e2j s3 of power?

  01.24: An electric heater draws 13 amperes of current i.,t8 s -rr,q/-k/xq )mczws;qrxechwhen connected to 120 volts. If the wx,.,rh qsm s-x; ei-k/rtrcq q8)c z/price of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately hoedn-p pku6 5qdv/cj)n: b1s.dw much would it cost to keep a 100W lightbulb lit continuously sc )uppnv/15bje6 :d.qdndk- for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb redrhq e/ui17/b 6 uols8sults in a power of 24.0 W associated with the bulb. Which one of the following choices beuhuid78 e1l rq/bs o/6st represents the resistance of the lightbulb?

  01.10: Each member of a familyaod 1:b.x.b-dyyu r a( of six owns a computer rated at 500 watts in a 120 V circuid..1 -a:u abdbry y(xot. 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 connected to four resistors to form a si zdbq0ht0l5l i 66zs):s jj/:uskcau-mple circuit as shown to0 aj-lzdtus6c60 s : hk5sl:qz/biuj) 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+a1lipizq0 4ycff;0 f4h u*ny four resistors to form a simple circuit as shown to the righfp i h41aq fy4;yf0 iu0c*+zlnt.
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 switcoj kh8kt3+ ifa)y)8a 2cpouu1h and three resistors are connected as shown. With the s)a+8aphcut12 ofki j8 o3ky )uwitch 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,r)f on6pk/e ;u an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammete/ke 6op; )unrfr 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 xgwoxorlf myts-:20+, * iz/ gand three resistors are connwf0g:gim+sx-/x, z*o lyort2ected as shown. 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 rigyg(4te o kl9o2ow 2kzs7:./xm x 7jg ,1njznnpht, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internaw ,j n7e 7.go 4n9oxxgtj( /kon2kzl1p2zmy:sl resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of aun;h3eofp f,, 1nhz g c9e( csn2/ vg/*5zbfpthe circuit shown to the right with resista9z*abnp ,/f(n2zh5p/vg f ;c,sce1heoun 3gf nces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resiybkx) r lyzfb 92fgyw64;(ox,stors connected in a combination series and p;k, bx)y gr96fxowyf(4b 2lyzarallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors ./mjm (d. 0xjdsn7 huh ahi+j6pf9yf(connected in a combination series and parallel circuun +fjh(9hfm.i( d70.mjah6jy /xspdit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Which8;-x5)hpvsgit+z f,x 9by usk bulb will be the brighfxsu; s )bpizk8-5vg9hy +t, xtest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are co y ibspykhm-+::igg* 4nnecs +i:4:mbghi-*yygk pted 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 ibhe887 apzf;am+sv l;1m yag9 deal ammeter, a switch and three resistors are connected as sh amf;s+ph 7y1aabv;8 ml gz98eown. 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 resistors are co jki8a, pyos//. .behrnnected as shown. With the switch open as shown inesibpohkja8,//r.. y the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?