16.09: In the circuit shown:hf-kna7sz /t , an electric current exists in the metal resistor connected to the battery. Which one o 7ks -fa:/zhtnf 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 resistors are connectmi in9d 3to61zkx64mh ed in parallel, the_________each resistor is the samen h4m6z916kmiioxd t3 .

  06.33: A current through the thin filament wire of a lightbulb causes avwp:ws1 y* 6dxkoz*n9ide /1the filament to become whit*d 1:neaixy*o9/6p1 dkv swzwe hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard householp0bn op ftbbl,)aiqch98r( 6 9d lights are being replaced with LEDs. LED is the ac,c8pbq99 )0 f(ob ip bahn6rltronym for which one of the following choices?

  05.16: A cylindrical grne j 8q8iok/0haphite resistor has length L and cross-sectional area A. It is to be placed into a circuit, but it first must be cut n8io8ejq/k h 0in 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 materiad9+0kfp r0k8ktjfj1 w l. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has1+wt9fpjfkrj8 d k0 0k resistance

  99.31: Wire Y is made of the same material but has tm(:51rf / t196k -an-ohszwhtzpctqlwice the diameter and half the length of wire X. If wire X has a resistance(z 9/t wpa1tlh-5o:k1r-mf ct6zhs nq of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece o 8 :r/pvyz/qd36yxwlq f material is then drawn so that it is a cyliq3dvqly/:ryzp6w x/ 8nder with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light buli ay)mdsbh7/e.3h hv+ b. He decides to modify the filament. Howsd yihb7 h+m/).aev3h should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrqs.;v3/3u -aot*dfc 0oqzc f9d 4mwwsical resistors are made of the same material. The length and radius of each rc.so fa zw;v-3d qd/w9sqo*m03tf4 uc esistor 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, are0 ah85rq :2 1c09ehdc .mpdfsscp,bp l connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in par ,hl c:8.psccpsf1eddmqa09p25r 0bhallel 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 accompanying circuit di yyt.r:-ppy8,9zcppm g azy.5agram has internal resistance 10.0 kW and the ammeaczyg8py5 pypy- 9m, prz:.t. ter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuitivq1c 30q w-oa shown to the right. The three bulbs 1, 2, and 3 - represented 0 vqq3iwac1-oas 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 alwedxyzn ,l q :7w;nw7.l three resistorydw:7xw.lqe;, nn w 7zs is equal, which of the following statements must be true?

  99.37: The diagram at rightd0:yweis1*fjqd l98- vpdp .j represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or 8vje0ldpq:.1pd w-ysf 9jd i*bulbs)
would you expect to be the brightest?

  00.03: Which of the followinaa0 ,1 vi+g oagkk;ep9g statements is NOT true concerning the simple circuit shown where resistors R1, R2 ank9v iaka+oep,0a; 1ggd R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to axas agq, xz61j/+r.fj battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. I16+.jasqjazfx ,xr/ gf 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 wil ) m3+w sutuwj66wawh1l pass through the identified resistor in 5 seconds once the ci t w )1uaw6w3s+juwhm6rcuit was closed?

  00.23: If all of the reb kuox2 74mq9xsistors in the following simple circuit have the same resistance, which would dissipkqb 4m72xu9xoate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the zhy9:3 pb6 qk.zt9dzj6.0 Ω resistor is 1.0 A. What is the 9p yzt:j khbqz.9 36dzpower supply voltage V?

  97.27: Three resistors R1, R2,kc)(j7m- e0oox8r mjo and R3 are connected in series to a battery. Suppose R1 carriesco r(j0 xo7k)-o8mjme 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 are connected in parallel to m6w,kqb*gbk.l0 3 mtta battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissb mtmqkt6l3w0 .kg,*b ipates 6 W. What is the current in R3?

  99.13: A heating coil is rsp5;y 1-n k5ckel+quz ated 1200 watts and 120 volts. What is the maximum value of the current un-5cz 1nqky;lk ps+eu 5der these conditions?

  99.23: What is the resistv 9oo6) m5xlhuz1t ru*xnmw84eyw :rx* sz8j1ance of a 60 watt lightbulb designed to operate at 120 volt szr:v*lm)xwe4x18*no6 1xwmty 5zohuu 8r9js?

  03.09: How much current flows through a 4 ohm resistor that is dissipatin5rzamrb ;7 8jh5k7w 5ossx)j*-2c/vmw tbr jrg 36 wacs5x-bbh8w*5r jtw rmj2a/k)7rz75 mrs vo;jtts of power?

  05.21: A household iron used to pressg kd + 2:sqcve5 ga8rw8mx-i ;u6mno2a clothes is marked "120 volt, 600 watt.” In normal use, the current ii8w:aa qvmg2;onugm2+k8cx r -de5s6n it is

  01.05: Which of the following resistances could NOT be produced by a circuitksd l 6mqsr*0u;aiei.o ; c2)g containing onlyo0dcie6.lsm;q; 2sk a)r iu*g three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resis.q4xo+ qmyy(dtors. Which of the following equivalent resistances CANNOT be produq4 dq+oxy.y(m ced using all three resistors?

  02.06: Three resistors ta0 moa-fw b3;ik3a3hof 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 can be pro;ohka3wf3aa mt-0bi 3 duced?

  97.35: When a single resistor is connected to a batterymi(3b f,:x.f7jvftw p48 h 0ruklg xh8, a total power P is dissipated in the circuit. How much total prl7ki8(0fx., j48fh v xtg3f:whpb umower 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 R dip1 e+iiu,sp/ nn17c1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is corre ,7ispc1ue+d/n1i ip nct?

  02.46: A hotplate is designed such k1asbe):m (lr 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 0.45 ams:1(l )bkerkg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissi t3dc/ne*i5 l * j(qxev)h;hyppating 36 watts of )hy*vnhqe td5p/3; exicl(j* power?

  01.24: An electric heater draws 13 amperes of current when connectnr6kt8zzu;e9m0)ym ied to 120 volts. If then e)9 muzkmt8;6yzi r0 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 wouluvr7;7)ak eh jd it cost to keep a 100W lightbulb lit continuously for 1 year at a rar;v 7 7ea)jhukte of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a -py:pl vatsn1c0a +2+jitpv :lightbulb results in a power of 24v ::asc0piy ++p1apl2 tv tnj-.0 W associated 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 500 watts inq b8d8 5c fokr0dmp-c/ a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, whar5cm0p fc8dq- kbd /o8t is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery idj55 e4,ift7 pq(ea sgs connected to four resistors to form a simple circuit as shown to the r7e55 tj a4s,gedqipf( ight.
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 anmhhj5 lr wnp 749kb-y-z3vn4 simple circuit as shown to the rig-b9h j nhnw4v74zrp-ml 5nk3yht.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, an ideal ammetexic6fd);)t5tzqte9tmx kjp; 1 y 8 pf(r, a switch and three resistors are connected as showd)cttqfzy t xfi6; ) p5;x8k(me1t 9jpn. 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, 9wlhn3tx8wh - an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as-thhwnw 9x3 l8 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 p2 nh; swdl)t.resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0p wlth .)s;dn2 amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the pz2o0 i jo7zs2right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors s i2oozj27 zp0have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the righh 4mlrqtb *h wl4uv69-t with resistancesml v6* wuh4bqh-rl 4t9 $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected inf wc-knf3 w qjq8p83srdp);1tp )z:sk a combination series and parallel circuitw3fq:r-8 s 3knc;w)8 f dqkppjs1p)zt to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected i;ephtz i8e qu.0hx- fq33kc1j n a combination series and parallel circuit to a voltag3icqx-t1 zuq3.f8k h0ej;ephe source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identic1ka ( 5yfdhs5cok6 gpz9g/lh( al. Which bulb will be the bri5 6d9/gy agc5pfoh(h 1k(zklsghtest?

  02.21: An ideal battery, anj;53e c1 hvxcq ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ;j53h qex 1cvcamperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, )2lp , nclmt*pan ideal ammeter, a switch and three resistors are connected as shownp)t ,2l mnl*pc. 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 ammeterwk20/1, :2izx xnbfx7aiitsn , a switch and three resistors are connected as shown. With the switch open as shown in the diagram th1sx7wki :ai2/nnb x tf,0ixz2e ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?