16.09: In the circuitzil l*9023 gnr*l lmye shown, an electric current exists in the metal resistor connected to the battery. Which one of the following choices il r0 l3emz*9y2lg ln*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 resistor0sc hlt fe(926czrox (s are connected in parallel, the_________each resistor is the sameeozxtc(( 6s 9l0c2 rfh.

  06.33: A current through the thin filament wire of ax/. cyk: k/piv lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happensv://pi.yk xkc because

  13.08: Some standard household lights are being replaced with LEDs. LED is the r c.n;vnwkbc.wn: 7;-l4 i a7k/sz rauacrony 7a:;r- 7.k;/n4wvbiaznrusnccl.kwm for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L anroa.x7u uet*0h*lr 3sf3 pwf/ d cross-sectional 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 resistivie f37.s*lfxp3r*ua/t who0r u ty to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same mater sxmylp 91anbjk 17-7sial. Wire II has twice the diameter and twicl9j7bpy1nk1- xa7mss e the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has t8/qg6ufq /(z2e 0w5kleelgss* n to j6wice the diameter and half the length of wire X. If wire X has a resistance of R thenqqz 02s e6ko nle tsfgw8e/j5(lug6 /* wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and x9r5bd nl+7y rba2nx4radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happ bn rrd9+b n74axxy25lens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. H 2r, c-kq*xib( b5ofite decides to modify the filament. How should the filament of a lightbulb be modified,tkbxi co -*2(5bfqi r 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 bwg 8ek)q5yob bv n7)bq13/fvlength andf k7bv/w 3 goyeb)bq8bnv) q15 radius of 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 banx5rd*m qp, q9eg/cmy .;is+p ttery 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 of t*yprdn i9gm+e/p5;sm , .qxcqhis arrangement of four resistors?

  95.35: The voltmeter in the accota(o1vr40 wq/ at;6md as)cvt mpanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter cd)v( w ormt;a/6tqvs1t40a areading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 1, 2, y ))omuxzf;+dand 3 - reprozxy+);du )f mesented 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 gg6 wk, rj()(.)msz igzxrnx8 at the right. If the current in all three resistors is equal, which of the followwx xir(rmjz(s)g)k,gnz.g68ing statements must be true?

  99.37: The diagram at right represents a simpl64;jy ;:uoi4owmt knxe electric circuit composed of 5 identical light bulbs and 2 flashlig;ikoy:u4 6j won4mx; tht cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the s9h.qgq8ww w9p:p4 fmbms5-f v imple circuit shown where resistors R1, R2 and R3 are have equal resp hw8: f-gw4.sw q5q9m9 fmvbpistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X wm9(s z3ophx 6is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with each other to themp369wzs (hx o same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identif t. e5laa*vxp+ n8j4 zkny.v3fied resistor in 5 seconds once the c f58 .a*z ylvvpeaxk .+3n4tjnircuit was closed?

  00.23: If all of the resistors oe sj(4q bpr)+in the following simple circuit have the same resistance, which would dissipate t(4sb qe+j opr)he greatest power?

  98.34: In the accompanying circuit diagram. esuu/aq , ewg8k(+kn, the current through the 6.0 Ω resistor is eku g. +k,u8wsa (qe/n 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1g r byvs1r8nf,)h(4hf , R2, and R3 are connected in series to a battery. Suppose R1 carries a 84r() gbnhv 1hf,yrsfcurrent 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 a b9ff+ qdur b0.dattery. Suppose R1 du.+0ffrbq9 dhas 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 vomhpk 6a5 oahix gh;/2rxhc*yx- 0b6g9lts. What is the maximum value of thha ga/69*byp 6ohik;h2 rxc hxxg5m0 -e current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 120 yfv5) (e52ar;corn2f,j na c zrdc m61vocamffzc, rjr ;ya (d)2e5 rc5n6v2on1 lts?

  03.09: How much current flows through a 4 ohm resistor that is dissipa b:s2( 1j/*ycab qsxnnting 36 wattsnn*/bac1(sbs y: 2 qjx of power?

  05.21: A household iron used to press clothez ygkftbs 0ut.tk3xie;16 4xm tw61 b5s is marked "120 volt, 600 watt.” In normal f i1ux6gt65 b.bt3k yt4z m;ext0s w1kuse, the current in it is

  01.05: Which of the following resistances could NOT be produced by a circu;a+tppw/f (fp it containing only /;afppp+t fw (three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Whr8,mz3ennjcxog, x /ej,ud l y:lo/*(ich of the following equivalent resistances CANNOT be produced o3 xzx/ jcm n *(n:e, oljg/d,,rlye8uusing all three resistors?

  02.06: Three resistors of different values can be connected tpv;ox-8o/l+h-r4k cvracy- y + oop:t ogether in different configurations. If all three resistors are used in aokco;t:+h o-r8xpy+ -avrc4-vyo /lp circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a toydmys/x9 9fq/tal power P is dissipated in the circuit. How much total power is dissipatedf9 y/qx myds/9 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 ;f.z u-s4sc 83gv 1dw/g nxecmconnected in parallel, the equivalent resistan8gen1u -3s;cv.s/ mwf dczgx 4ce of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed sucha-yn-x (fe-bopv8 rb3 that it has a resistance of 12Ω when operating at 120 volts. What is the minimum xvonr(-fyp --b3bae 8 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 urff c,4s,hp 2uo 5-jzthrough a 4 ohm resistor that is dissipating 36 watts of powuz 4,-hjf,os52rc ufper?

  01.24: An electric hbtyhi/ xvts1i/1 ff7bt9rp*w ;mb1 e 7eater draws 13 amperes of current when connected to 120 volts. If the price of electricity is f rms7/ b y9ttfxvwbp7thb ei11/*i;1$0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how mu7u7jsvf8p / lj0z7ee cch would it cost to keep a 100W lightbulb lit continuously for 1 sfp u8jve0l j7z e7c7/year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a poweag lf6,7/p/dkfk lm2 lr of 24.0 W associated with the bulb.2/l/,kll pkg7f f 6amd Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a comp p6kn-206a:afhsa v qzuter rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the maximum number of fha q0z:s aav66 kn-p2the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple circuih1;8kwl tqzu5 t as shown to tl 1 uzkhqw8t;5he 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 con.r,.lpehhxalb: dz 7jz k/+o;nected to four resistors to form a simple circuit as shown to the right. zel.rkb.ox+zdh / p lah:7j;,
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, an idnm f.v: f p2 gtqa7duq415fv*rxvi 1/zeal ammeter, a switch and three resistors are connected as shown. With the switcz/q 1vdar:f51 7x *p4i.n mtfqvv2 gfuh 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 batterysw-dlngcl.7r4 d el pi8-i5-n, an ideal ammeter, a switch and three resistors are connected as shown. With tr w754-lnd--i.8ngp ds ilel che 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, anoae4 byjfq1th6 *zf29 v4j x8e ideal ammeter, a switch and three resistors are connected as shown. With the swit4 t1 6ahe8ofjez jxb fq*v92y4ch 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 right, what is therpgk;s7x y2a;or j d*5 equivalent resistance? Asskjx5rga;2yo * ;pds7 rume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right wia j:yn fsdn36 :wy7grvb)()xsth resistance7ynx rs jby :n(w3af)d:g )s6vs $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical 0 qu* kn ;:f+np/ywwlvresistors connected in a combination series and parallel circy+: lfunkq 0vpwwn*/;uit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fda, c,0rpq39khuzr.gs: q0g iw; i hm5ive identical resistors connected in a combination series and para 0 qmuw53;rid.aik z,,cpghqg9sr :h0llel 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 are identical. Which bullnj8rx -hgo po 95/x6piwl,k:b willlglk ,8o9prw6- :pi5 n/xhxoj be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors ard;:he 27vjuq:f(b xt oe connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. uoq :dhf x;:tej vb(27
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideah 9 btnbs.,md*l ammeter, a switch and three resistors are connected as shown. With the switch.tdhb,9bnm*s 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- o669b wh1dayvf: ftr and three resistors are connected as shown. With the switch open as shodh 9:otf vb-6yr6w 1afwn in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?