16.09: In the circuit shown, sq*c03 ez(b1rfjp8 uy8dq ;t ban electric current exists in the metal resistor connected to the battery. Which one of the f8t bbz*fc(jsdqy e8 10ur3q;pollowing 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 connected in parallel, the_________ea5w0elu/2m 4vlrzz;m4 ,qr8imnqz7 s vch resistor is the samq ,/i z4m7vmz8qleum v 0ln4r ;2rsw5ze.

  06.33: A current through the thin filament wire of a lightbulb mu)b(tj*vr 9 jfb 8yx:causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cojt:9bxmfb)( vr8*yju oler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LEDgwkpt,: a7-abktsqs.pd0 e , 1 is the acronym for which one of the followin7 1 g.s wd-ak,e0qptspkta, :bg choices?

  05.16: A cylindrical graphite reszx.e5m uy 0u(b;fn2.chx8qsv istor has length L and cross-sectional area A. It is to be placed into a circuit, but it first must be cut inv h.e85q2 xmzn( x uf;uys0.cb 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 wiretfs8ly73b( p.sd(x su II are made of the same material. Wire II has twice the diameter s x7sf(3.plsu( b8ytd and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of th;k;p2 kd,b ov i;/psfse same material but has twice the diameter and half the length of wire X. If wire X has a resistano ;sd p ;bk,ifskvp2;/ce of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length vw2cprbo- *pww2p 43:sz.c noL and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material bpw2rso 4:3.bz-wnow pcc2p *v ecause of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decidesg5bsccd/s75 mc-g 9lo to modify the filament. How should the7dclgg/o cm-b 9cs5s5 filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. Thhchspt 5(6(c 0azwz /pe length and radius of each re tc(pp h5zswza 6ch/0(sistor 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 iol747wp b rt6sun(he-n 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 rh6b7rl t 4os7-w(puenesistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internal resistanlajrx+j1o l0: ce 10.0 kW and :1axrj l o+0ljthe 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 circuit zn 2iuygib5)+ shown to the right. The three bulbs 1, 2, and 3 - represented as resistors in t2 zby+g) ni5iuhe 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 curh7n2jmc6aydk sqd g3+6 a,b3 orent in all three resistors is 6adnao +c h3,s7kjdgm3 26qyb equal, which of the following statements must be true?

  99.37: The diagram at righhf; 6vwgg:m w;vu,:xet represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bulbseu gxgvm:f;v w,:;wh6)
would you expect to be the brightest?

  00.03: Which of the following statements r8unc c 5o+l4ipkg+ (*fuc,my is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal*+,lr kpc8 y(u cmocf+ ngu45i resistances?

  17.29: Two lightbulbs X andY are c1xgi(5p0 y(t0+(yieye g gw mqonnected 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 (gyy05pi(+1 (eegqi gym w0txbest represents what is observed?

  06.34: How many coulombs will pass through the identified resistzp c*;ewxk.*mor in 5 seconds once the circuit ;m*wexz kc.* pwas closed?

  00.23: If all of the resistors in tedc.b4 dy1 r 3tv3b99 kkwx6rjvlv5q/he following simple circuit have the same resistance, which woullvv6r r 315bv9wxc /qy9k .d4t eb3kdjd dissipate the greatest power?

  98.34: In the accompanyin+z+ oijichvkte) o+f2+: ak /fg circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply 2e+v f:k +k+jt oi+)oa/ichzf voltage V?

  97.27: Three resistors Rdl6gii6m srs88d 51hq 1, R2, and R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, a6s s5hd81qmdril6ig8 nd 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 bk,b 6gcg,/s ap,v ,k 0gsj)ojjou 3v9vattery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 disvj)us0,ovggk,ojsp/9j,,ba3g6 vck sipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. g0 *h0pdev.x a8k ( -co0xalsp What is the maximum value of the current under thesv0xcx 8ha0e*alk0spg-(po. d e conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed gcdmh1;pr5 +zffw3o-to operate at 120 vo1gc35+zffomh d-w;p r lts?

  03.09: How much current flows through a 4 ohm resistor th44nnb rq.a fyg 73hnumh:)f;u,zgh h;at is dissipating 36 wat fn:n3bq,hfh4anrhmu) yg.4zu;7h; gts of power?

  05.21: A household iron used to press clothes is marked3,bxhqjomk; h4b0k1+m uxb5 p "120 volt, 600 watt.” In normal use, the current in it3bxokm1,4mx b0 jb5ukqp h h+; is

  01.05: Which of the following ru -v4ydi8 kdcs* x+jx4esistances could NOT be produced by a circuit containing only three iden+k*ddxy 4 cu j4-x8vistical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. : (2bcuq)veaz Which of the following equivalent resistances CANNOT be produced using eqc:a2bzu(v) all three resistors?

  02.06: Three resistors of different values can be conneoybw 1k6 ep :9.5qrjv:j4z:u5yu txd acted together in differentxp:ey9ju 1 .z:b 6uk d oy4:jtrawv5q5 configurations. If all three resistors 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 totaluw, u h7vzb xavq)33k0 power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identicalw3u) a7 3 hbkvu0xvzq, 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 Rapeiah7+r6jj7e c0:wun-+ltag 0o w/ 2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistaew+u7patcgroj0-0h +j /6:iae alnw7nces is correct?

  02.46: A hotplate is designed such thab3vuaux. o k4/t it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it woulab4.kuv/ o3ux d take to warm 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 ibexmpt4 gh,,q )e).sm s dissipating 36 watts of pow4m tpg,))xshqbm .,e eer?

  01.24: An electric heater draws 13 amperes of qz:.4i j.jrktcurrent when connected to 120 volts. If the price of elejzjr:.k .4t iqctricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately hofrb31et-ztv 0l 9ek e3ac 3yy*w much would it cost to keep a 100W lightbulb lit continuously for eyvete 1al9b*yr f- z3ck33t0 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb rej9rfhr*w :6nc3 -ajtxsults in a power of 24.0 W associated with tnx9*w-t6j3h c: fajrrhe bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of7 lw,w05iosc e six owns 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 is the maximum number of the compus i,c0ol57wweters can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors v4mnr -ly) 6kwd(a6 9ercf7vlto form a simple circuit asl ew v9ac- v4rlm(nr6ydf)6 k7 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 resistors tkmj ,y dbm; ad0(nbfx a2;dt. 1zxt2/do form a simple circuit as s,b;1 0nd2 m;xbd dz 2atax/.( kjdftmyhown 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 ideal ammeter, a switch and thud2 yw oqh57v,r;wolg:c 2g.;f7ogza ree resistors are connected as shown. With the switch open as shown in the 57udh.r; v q,c7gf: oo2 w 2zalygg;wodiagram 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 conn0 e 0srw)vxxkk q2c:edn*/;g eected as shown. With t)cx2k0ekv ;0g *:e/sw ex dnrqhe 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, a7ikau z8pee;b ub,/k *krm(/p ieqb 98n ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the zab k8 p9biei7/ pebr,m *;e/quu(8kk 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, wh gaa8*:jogk j 64c/ 5yplfii*oat is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R ij4gyp *8kjl oaioa:*cg f/65.

  09.07: The equivalent resistance of the circuit shown to the righty tti0*e , cgdx04;xkt with resi k*tx 0y;gt 0,iedxt4cstances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five lp2f6x 0t- bnyg 1t.:xk ; tathdf2f:zidentical resistors connected in a combination series and.6khp-b t dz0n :lft 2x;:t2xaf1gtfy parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connectez7mizz 4ch5l, d in a combination series and parahmz74il ,5zc zllel 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. Whw ; xm3l(ih-mmich bulb will be the h-wm m m;x(3ilbrightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three )44lofvwag1zresistors are connected as shown. With the switch open as shown in the diagram the ammeter readsz)vowf41 4ga l 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 connr2xi8 w-dprg2 ected as shown. With the switch open as sw -2grr8dix2 phown 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, a q5aa2ftb. j)qh /pl2gn ideal ammeter, a switch and three resistors are connected as shown. With the switch ab5fpjtl/) gh2.2q qaopen as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?