16.09: In the circuit shown, an electric current exists in the metal resiba.m9o )jtv2 istor 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 the resist. v)b9 o2itamjor?

  98.06: When any four resisto6+ ke id0tk3 zva1ql/ors are connected in parallel, the_________each resisto6ti a3ko1l kezv+ qd/0r is the same.

  06.33: A current through the thin filament wire of a lilapi xe6k2 a.9ghtbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens beal2 ake x9ip6.cause

  13.08: Some standard household lighe 53*uwqrl h(ets are being replaced with LEDs. LED is the acronym for which one of the following cho*whe3lr e 5uq(ices?

  05.16: A cylindrical graphite to 0g semt10b5qd 9xwzu/za(8 resistor has length L and cross-sectional area A. It is to be placed into a circuit, bz8o9xt 0g tq /mwuz (dabs01e5ut 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 material. Wirsty r;*/ parj6dw-rg:e II has twice the diameter and twice the lengthr*r wd j ;r:sag6-/pty of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the5c7ld 3mymcd:3 oqlb2 same material but has twice the diameter and half the length of wireocd 3 b :cd53l2lym7qm X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has lengkio:kbutj*) 5 xyekoo,),q/uth L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resist * o/kx,q uk)ouoty,e)k:ij5b ance of this material because of this process?

  07.27: A junior Thomas Edison wants to make th2wn 3ul6qu 3a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the6 u3nh3u2qtlw lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistcrxc0 u6ycmvnf6-2fkku0+ 8x p s8wp+ors are made of the same material. The length and radius of each resisfxpyv8 8fn uk0c6pwk0+rs6mcxu c+2- tor 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 w)bo/,b ffwc e1 qnl:9in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel w9/n1 ff b)qecl,b:o wto 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 t;pnj w((inz pb- m66tche accompanying circuit diagram has internal resistance 10.0 kWwn6 (jnbtcp;pz 6 (im- and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuw 4dl 26ejl7.sidrv- rit shown to the right. The three bulbs 1, 2, anrrl j ddwi.-46l7evs2d 3 - represented 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 the current in hkf y5ouve/pk5d(r i77+ pv6eall three resistors is equal, which of the following statements must bei5p v(yok f6+7uvpe 5erk7d /h true?

  99.37: The diagram at right represents a simple electric circuit compofev+ /ru-6ya x;wyfn4 eez;,vsed of 5 id;6-+ne fyy/fuv4 r,vx z aw;eeentical 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 concg k,c.aacd jkvni 7 0;/sfqzh u0,8mtt (idt9)erning the simple circuit shown where resistors R1, R2 d/tki q;fnt.acu s9v,(j70km8h c0)zt iag,dand R3 are have equal resistances?

  17.29: Two lightbulbsj-lkp i;7 ikod49u-k n2 +d/k/h rlepn X andY are connected in series to a battery. Bulb X is brighter 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 obserrpdk -hl49oke;j/dn2u-+i7/kli n p kved?

  06.34: How many coulombs will pass through the identifiduhe 19 g(ap2+afxw5ct*k hu-ed resistor in 5 seconds once the cu2(k+f*h9pa-tux1 aw gd 5 echircuit was closed?

  00.23: If all of the resistors in the follom9yp9gum/ - sqwing simple circuit have the same resistance, which would dissmg q mu9sy-9/pipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.p+st(u5 l.uex0 Ω resistor ts. (+upul xe5is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a batteb(v/v6/a kmcery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of powv a/m6ck(/e vber. What is the voltage across R3?

  99.40: Three different resistd 19io ua*yv-yors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the currenti ya19yuv-*d o in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is 9y 2/gmr k16lxp+a ,osrwxj7f2x f7futhe maximum value of the curk2o ls rur xp7f9w1yjx6+a,x/gffm2 7 rent under these conditions?

  99.23: What is the resistance of a 60 watt lightbuwpk7s(wms .j hnl:3 f*2.wsp plb designed to operate at 120 vosw:(w wpjphk. .mfn 7 ls3ps2*lts?

  03.09: How much current flows through a 4 ohm resistor that is di61x/c qvqe,m+iie xp +ssipating 36 watts of pow,eex 1 / iqqpi+cxmv6+er?

  05.21: A household iron used to press clothes is marked "1203i oixqsp zmo,2p.(lpe4q:: ;6r rid q volt, 600 watt.” In normal use, the current in ito4mq,pii sl.r;zdpxep rq( qo :362 i: is

  01.05: Which of the following resistances could NOT be produ+khx8dg c.j,a4r(yrq cjt)1 fak)tm1 ced by a circuit contain8j.1x kr )mar,cdqya)f4tghj+kc1 (ting only three identical 6Ω resistors?

  94.37: You are given three 1.0 7anqfr ,:;t nbo 61r z2fquu7k Ω resistors. Which of the following equivalent resistances CANNOT be 1q uztkfa ,:7n27bur;q f n6orproduced using all three resistors?

  02.06: Three resistors of different values can be connected together in diff e 6pkmo)4ldt3erent configurations. If all three resistors are used in a circuit, how many different values of total resistance can l3dt) 4mp6ok ebe produced?

  97.35: When a single resistor is connected t6f (qi x0evzs(o a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if nez qx0vs(f(i 6 identical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, ha9o+b qbut4n9x t5u: p)qbcq 9iving resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resis9+qbxtbb5quc4u) i ptq:9 9ontances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when s 2/u 5w dkust.70s4 l/oyvlmcl b+-jvoperating at 1s .ks cj4l/lwst+y27/o u0-l5vuvbmd20 volts. What is the minimum amount of time that it would take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows th( fq- hxj2)vz wq2f1wlrough a 4 ohm resistor that is dissipating 36 wa)2f qvwxhwz-12qjl( ftts of power?

  01.24: An electric heater draws 13 amperes of currenthy9+.bc tqei8 when connected to 120 volts. If the price of electrici89eby.h i ctq+ty is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would it cofa6tfi (*9t fdcze8*z st to keep a 100W lightbulb lit continuously for 1 year at a r f f6cd*ia9ze (fztt8*ate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbuuk/ot d1f 8t*hlb results in a power of 24.0 W associated with the bulb. o1tk tuh*df /8Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of6 fg1zw-dk0s:fah3hh six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protectedd -hf130fh a:zhsg6 kw by a 20 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battsd u3jb/v jf0*)woau;1(ppin b5ag4yery is connected to four resistors to form a simple circuit as shown to thwvn35g0a i;*1)dsuj j/oby(f4pau bpe 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 forwedf u/,vvh32 m a simple circuit as shown to hf/u ve,2d wv3the 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 sw,a9i9dduai l 21xixd1itch and three resistors are connected as shown. With the switch open as shown ia1uid l1d99,di2x aixn 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 o 4r5i9fd72q*je2c a b 8iiqihthree resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 5 iidirq7o 2e a9cbihq8 42*jfamperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal batt7 )xb4jl :ocsn/zuk,dolsw ;a6dzj2 ;ery, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the am:l kaol7 wnszdj) 6 b,ucz2;j4ox/sd;meter 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 right, what is the equivalgh zh6d7qi- ndbj b+,hxwpo 1p, *th(+ent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors havhgw d+ z bbh7,x d tjho-ph,p6ni1+*(qe identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right q )i*7g( wl 8f8s8rrm)xdgkww with resistanc78fg)i*( wdlrxqgws88)k mrw es $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistor87gg yb,zdzl* s connected in a combination series and parallel circuit to a voltage sougbz 7gz*yd8l,rce.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors c vq 1 gd6krd66(ihsz qjjki9v 5or*:o8onnected in a combinatio6:*5k1j szq rivq6odri8ho (9vdkg6jn series 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 advam w .8y06pdx3vmva ()ak)bre identical. Which bulb will be the bri6mvyvxp bma0w 8)d)ka d(av3.ghtest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors aredh jx, 9/5xylq connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. x,9 jh5yxld/q
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ez mtk(jh2k4hr q5(m5 ammeter, a switch and three resistors are connected as shown. With the switcet4 j qkm55(kr2h mhz(h 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 id c8uf-nc2t* 2 jpfe8cgeal ammeter, a switch and three resistors are connected as shown. With the switch open a *nct8ug2p8cjeff-c 2s shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?