16.09: In the circuit shown, an electric br+(lk7vbo2bq k*mkj 80zb,icurrent exists in the metal resistor connected to the battery. Which one of72z8k( rb ,0 mbjl+bok*bivqk 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 revk.+)t( r ccfvsistors are connected in parallel, the_________each resistor is the ()vtr.+cf kvcsame.

  06.33: A current through the thin filx1+ xytvwi7ur4l5 uu 2 nvdu+,ament wire of a lightbulb causes the filament to become white hot, while the l l v2w4+yr1u nd,xu+uu t5xi7varger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced withn lvk 2v9aryly5h0:0v LEDs. LED is the acronym for which one of the following c2v 9y0vvlynr 0:alk5hhoices?

  05.16: A cylindrical graphite resistor ,3 dexh7icqz+7x xup x*eto+, has length L and 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 resistivity to the old resistuxhqzo+*,7 7xx eie+xdp 3,ct ivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has twice the d)*dje7- ifw nm e1qvv;v6qy)bpa:c0u iameter and twb;nm p1 yuajw:)qe6dv*q0 e7- fv c)ivice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is mad jtv e1:b,qe6re of the same material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a resistanceer1 6 vq:bjte, of

  03.23: A cylindrical resi5o nccnr(bm c6;. cq:lstor has length L and radius r. This piece of material is then d( l:6 ;ccbncmqrn5 c.orawn so that it is a cylinder 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 t(4jomt 8 pu4khs9)yblight 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 a givet4 h9)s(o8ty p4ujkmbn voltage?

  16.07: Three cylindrical resistors a7tbuir blu.7,efe)6y3 6n azqre made of the same material. The length and radius off erla6,)uy3bn . 67z7 bueiqt 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 *7mlvh-j; kfeR, are connected to a battery in the following way: “Two resistors are connected in ef - v7jhlk;*mseries. 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 accompanying circuit diagram has internal resisy cx;ja-k,dr: v kw8bxot20w;tance 10.0 k k-ky;vbx8w0tc o:xw2 ;ard,jW 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 com7 m ll0vs:pwr)pound circuit shown to the right. The three bulbs 1, 2, and 3 - represented as resistors in the dil wvs)p ml:r07agram
- 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 electrrxuf)3 d5- p h,6yr lhjou6/t zka.sb9ical circuit at the right. If the current in all three resistors is equal, which of the following statements must be ta-x3 h t,oh)upy .sr6durzl9/fj5k6b rue?

  99.37: The diagram at right represents a paya7 1 ygq(kqn8wg(j4g0eg ;simple electric circuit composed of 5 identical light bg;g y n7q0e4a 8wgqa(ygj(k1p ulbs 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 concerning 9 jk(q lac81vfbbmr (4ar(c6fthe simple circuit shown where resistors R1, R2 and R3 are have equal res4l9(( vj6qrbk8(1ccrbamf af istances?

  17.29: Two lightbulbs X andY are connected in spp * rg oxws(2+t13apseries to a battery. Bulb X is brighter than bulb Y. Assume all circuit elemerpsp3gx(oat* 1pw2 +snts 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 observed?

  06.34: How many coulombs w8.xub580l3ad ipeuifill pass through the identified resistor in 5 seconds once the circuit was cloaul08ixbi3 . upd5f8esed?

  00.23: If all of the resistors 8.;.qjpz xnvtl*df5ux :dh0u in the following simple circuit have the same resistance, which would dissipate the greatest powe5xnup*d j8; thf..0xdz:qvu lr?

  98.34: In the accompanying ozs-vdrh2:kp )orw,( circuit diagram, the current through the 6.0 Ω resistor is 1.0 orzv:)- h ps2 wokdr,(A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery.gw ifkzfowjq1m:0* x 9r65 (kpkh(it4 Suppose R1 carries a current of 2.0 A, R2 has a resiszxk p6:kt50*j9kowh m q1ffi(g4r( iw tance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1,gsuet+du*+* h/q: x -lehpglw3o. pc / R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. Whac3*t.h- exshgqglp :e+ uo*lw// p+du t is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volt 5ks:jwuzwq.qa 3m1icj4 .ck9 s. What is the maximum v k.51ucawqs4zcm:.9ij3wq jk alue of the current under these conditions?

  99.23: What is the resistance t nzf4t cxj09of auy,p91e888olhbe3 of a 60 watt lightbulb designed to operate at 120 volt hobfeatpx90ty8138ue cn,jf 9l 8z4o s?

  03.09: How much current flows thrgo w97b8f .atdough a 4 ohm resistor that is dissipating 36 watts obdgfo78 9wa.tf power?

  05.21: A household iron use sps;11 ogsu/rd to press clothes is marked "120 volt, 600 watt.” In normal use, the current in it1s;/gr1s osp u is

  01.05: Which of the fo ssfkohf1jzc n(*s s7(.g5/oullowing resistances could NOT be produced by a circuit containing only three identical 6Ω r7s o *.sufg k1/nocj5szshf ((esistors?

  94.37: You are given three 1.0 Ω resistorsd e:j6g0z 1ya uft9f,u. Which of the following equivalent resistances CANNOT be produced using all t 1uu0tyg9dzfjfe6 :a,hree resistors?

  02.06: Three resistors of differe/ryxk.2t1*q v 0* px7nfnqiswnt values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance . k7nx/y0v*x2qn*1 qfr iwpstcan be produced?

  97.35: When a single resistor is connect/r * jcw3s-bladg t +7am.dcm0ed to a battery, a total power P is dissipated 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 m jc/am0br+csg73w -dda. l* tresistance of the battery is zero.

  96.16: When two resisto m .app)7xuje; ig.k9grs, having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combinatikg)igp;9 .7jp e.xamuon is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 1,n z n55uhkj4p2Ω when operating at 120 volts. What is the minimum amount of time that it would take to wau4 n5,kzjhp5n rm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissipv 1 c4lmlnpmw;/,gucnfik62+ ating 36 watts l+im g,4clfk nmc/6 uw2v; 1pnof power?

  01.24: An electric heater dxmz3a;ce k8g7qx) vur at -q7/raws 13 amperes of current when connected to 120 volts. If r) u-q t78kz;xxcg av eq37ma/the 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 would it cb+6z4ppeh f2w wmxu-:do v1j2ost to keep a 100W lightbulb lit continuously for 1 vzhj:m1o+u2 4dp2p ebwf-x6w year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb resultsuwr5xjw +2sfe;z b-h5 in a power of 24.0 W associh2e ;br w+55jx-fsuzw ated 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 o3r5 (e3hb/mf u rgqh +0;swdejwns a computer 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 r;mrse 5 /gdbqfu0(hwh+j e33is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resis1ujk f; lfs5,stors to form a simple circuit ass5;lfujsk ,f1 shown to 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 four resisto-z 9 ;xf+ oi biao*f2qdfu)dm0rs to form a simple circuit as shown to the right.o0-)aidbdqi m 2*zo;9ufff+x
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 swre ** )ikyn; 1yvplqio27/cbn itch and three resistors are connected as shown. With the switcin ec/nkb)q7ypy*vi* 2r1l;o h 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 ideal ammeter, a switch and three resistors are connv;z;x ehk9x aj9mj 4y0ected as s ejkx 0 z;xajh9;94mvyhown. 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 resis3kx(cpgszv*,jf v-,rjf e/ x +*lfx4etors are connected as shown. With the/p x*cfkre3f4j vl g,fs( *xz evj-x+, 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 shv.ea h-e1n06 t o:mulbown to the right, what is the equivalent resistance? Assume tanuhb01.to: 6l-mee v hat 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 8p xvv./vzd;f)dx m ;sthe right with resistaxdd/ fsm8 xv.;;p)zvvnces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical r 5yn2/4px2bcxln g goa)abr4mcm g05u *db0u/esistors connected in a combination series and parallel circuit tamybu/ pbg425ludcn0/omx5) gg0ab c2n* x4ro a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistmt+k-8wswhsc n )s6it( b2,yhors connected in a combination sem2tsb+ 6, 8c- snhw)(stw ykihries 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 af(o ;g ir4v4r are identical. Which bulb will be the io4r;r4ga fv( brightest?

  02.21: An ideal batteryfxr8)y 4u1uisgmn 1r:, an ideal ammeter, a switch and three resistors are connected as shown. u1ru4 18yfgnm):s rxi 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 ideal ammeter, a swip 6i nn 5sque-.ga1zz f2h7p*ytch and three resistors are connected as showp5niqenga-sfu 7 2 *1zzy6.ph n. 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 resp9n0361bj6a zxvni5 d co h losn7x3)uistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampec jhna6n 3obo1 76uv )3ln09p xxzsd5ires.
When the switch is closed, what would be the current in the circuit?