16.09: In the circuit shoevj hgr-7/7kbwn, an electric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flowrkj77-veg b/h 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*+0xnbsmuez cljlhzw c2,:vgfi)- c gs-)u*, parallel, the_________each resistor is the sage , i2zcxng-lb sch -l u: 0*fcwszvj+m,))*ume.

  06.33: A current through therp.re x )c.pcatwo5;2 thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain .r c;p.r5c)xpwot2ea much cooler. This happens because

  13.08: Some standard household lights areml t7vwt1j l-+ being replaced with LEDs. LED is the acronym for which one of th+llm jw 1vt-t7e following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area9wpe. ts*hpr jd5;ie 3 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 w5sid9.e*ejprt;3 p h cylindrical resistor?

  98.20: Wire I and wirzk8joj ;(h+, q7)bft fgo9x lewa0-qp e II are made of the same material. Wire II has twice the diameter and twice the len- pxb ) te f,w8;jolza7jh9qfkq 0o(+ggth of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the dia sd*x:fpa5c:*d7 ji2prc skr w*, 7zr.6uihicmeter and half the length of wire X. If wire X has a resistance of R t.xpi:uis 5s76:dczip r,fr * cwd2*a ck*jr7hhen wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of ma3pz3v2 i6, c7ggp rv)uhfr0bvterial is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material bec v76gvp2r ziur,gc3p h3b0v)fause of this process?

  07.27: A junior Thomas Edison wants to make a 0q 2q koj(5o2 k(yxacnbrighter 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 kj cqo2 ao((y025nx kqa given voltage?

  16.07: Three cylindrical z)mm 5he5r) 2rjkibw wrn,ly8f*r+t *resistors are made of the same material. The length and radius ofr il mzh m+wtnr*8ebr 25j*)wyrf)k5 , 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 the h,/ut5.fo h kwdk bee0xntbo)v50:y 7t2-lek following way: “Two resistors are connected in serie enbh) yx-l5tk f 5dke,0u/ovtkw th .072e:bos. 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 a:lb:18rv1bcu/ a ;3 b* cvzkzr8fxohoccompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammr:u1/ x;bav1 bzr zo8olv c*:cbkf83heter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compounx -u**x n-:j, vtdozlkd circuit shown to the right. The three bulbs 1, 2, and 3 - represented as,jd*u -:lv-txxn k* zo 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 elenp, ,hu+ i6/.c9xni bss bk) agb)4,yapl*wokctrical circuit at the right. If the current in all three resistors is equal, which of the following saxpi nyksglw. ,6sc,pk)*4/obbnhi+a9b u, )tatements must be true?

  99.37: The diagram at right represents a simple electric xkhwg :q9c/v, circuit composed of 5 identical light bulbs and 2 flashlk gvh:/,x9c wqight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true co n4ins,hq;./qz r/cds ncerning the simple circuit shown where resistors Rqz4,.hni/ ssrdqn;c /1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are :;:*iwh epsh*zjdp ,xconnected in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbsh:is:ze w, pxdj* *;hp 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 74yqbw4iem.04wwt . a-hxlf d;h 9mj jwill pass through the identified resistor in 5 seconds once the circuit was clos7t4 -mf9 mx ebhlih.;j .wjwya44q0w ded?

  00.23: If all of the resistors in the following; x;ernw 5fge+ simple circuit have the same resistance, which would d; egf5r+n ex;wissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through thuzf ele21q;:u0. jbqre 6.0 Ω resistor is 1.0 A. Wejrq bfl 01quu2.;z: ehat is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery.squhzs/ 3/. kwc* -jyc Suppose R .cc suz/kwjy/h3q-* s1 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 aws+jc0jl 0 ,rjre connected in parallel to a batterylsrj 0,0w j+cj. Suppose R1 has 2V across 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 volt:hef p-8ipyq3 s. What is the maximum value of the current under thes-f 8e:qy3ph pie conditions?

  99.23: What is the resistance of a 60 watt lightbulb desii)7x(hl l xc9xmxaj19gned to operate at 120 xc7m)19hxajx l(xli 9volts?

  03.09: How much current flows through a 4 ohm resi:tl7br )rtm9b wz5k;e226ygsl y gkf/qdsl +6stor that is dissipating 36 watter6bm:lzds)6 kw7yy/g9+ blkstl;g 2 qr25fts of power?

  05.21: A household iron used to press clothes is marked "120 vwp;xmv nm 65+ cm7 -(llxejl.eolt, 600 watt.” In nm mxl.j- nl;xe6 5velp(w7 +mcormal use, the current in it is

  01.05: Which of the following resistances could NOT be producehes3fie4-k-lu+0 ug2t)uno (lgh, y od by a circuit containing only three identical 6Ω resist-i o3oe lust 2u0hyfehggl,(+)-uk4nors?

  94.37: You are given three 1.0 Ω resistors. Which of the followt29blq 0eg ac7ing equivalent resistances CANNOT be produced using all three resistors0c97l qt gea2b?

  02.06: Three resistors of different values can be connected together in ditse kx-p7j6pq t.ne (:fferent configurations. If all three retjnsxpqpe6. : t-k (e7sistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a tozj;qjmv;) 8ubcc *. b hj(4knttal power P is dissipatenj (c4t q;.8jc v;zm *)buhjkbd in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connected in para ;:vrl*co8tu g62 +lijx6amgjllel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correcm2cal r+;:vogt68 jxuj ig6*lt?

  02.46: A hotplate is ujoq6lpi.06zdesigned such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.4p 6ij 6.u0lzqo5 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissipatf +vcxk rbdn1a5i(/3l ing 36 wa5l+n k1bxvi crd f(/3atts of power?

  01.24: An electric heater draws 13 amperes of current when connected to 120 volt8z3gep r pxe36s. If the price of electrix3 p3z re86epgcity 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 kee*n/f 2nna6rulzh )t f4p a 100W lightbulb lit continuously for 1 yearatrh24z un nlf*n6)f/ at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power of 2d z/o l8m rukd1 rsj1s6p;m2,p4.0 W associated with the bulb. Which one of the following choic,ku1j mpr8 2po d;61rsdsml/z es best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500d)7pmnwf*)n qwiz /pq5 kc87g watts in a 120 V circuit. If all computers are plugged into a single circuit profp/nmck 7)q nzw)wgi*pd875 qtected 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 su8akwhz xxqp15 2c s4-imple circuit as shown ts 8 -1ca xk5qp42xuwhzo 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 battyozc a)bc4 rpm/g.)vgv(j79dery is connected to four resistors to form a simple circuit as sr)ogbv z cj74m(a9 gc.dpy/v)hown 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 ideauap: upe vfq:5 x(9;;zk;y9:u eiwqxjl ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amp:jp uxuq :;9 ei9q5v:yew;( fuxzka p;eres.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal au*1h0h/ 3nuxyfq )c k.ex1 tezmmeter, a switch and three resistors are connected as shown. With the switch open aeyk)n f1cu1*u.h e0 zt3x/xh qs 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 switczvrlvh5(q ,j4fg0 d(j lu/:p12ffr tlh and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter rlt4,:l2vrjl( fu5h vdgq0j /1rf ( fzpeads 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 the equivalent resistance? al im/ms q sgjd.* m*yc 2q489eeli5een;: to7 Assume that all wires are ideal, the battery7i*le*s ldes q/mg8 meeti4a.qy2oj 9m;:5 cn has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right witwf,u ca 2lppdg:2g9p :h resista 2g:ucl 9p2:dpwgp ,fances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below showsku,k4a8c6 ifb five identical resistors connected in a combination series and parallel circuit to a voltage sourc4a8bc uif6kk ,e.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identico:mgilwwl5js/7 0 ge9al resistors connected in a combination series and palsgm/7gj i5 l9 ow:0werallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of jifuwsh*pyf 1nv-6m zbx2 .84the bulbs are identical. Which bulb will be th z ufiph1v m 4bjw.8xfs-26n*ye brightest?

  02.21: An ideal battery, an ideal amh 7 na8rmkl8a,j4 7u;dvbgyx+meter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter rr; ua,v8 g l 8xkb+7dam7ynhj4eads 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 kww 2 pc4ripx3olvu42/ ph4 ,eand three resistors are connected a2iw4w, 34 poxkcvpru2/pelh4 s shown. 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;e5 +)e2pjz(ov stt(1piax wg and three resistors are connected as s)t2p(eg1xwtvo5ja(+ps; eizhown. 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?