16.09: In the circuit shown, an electric current exists in the metit9iap lip ab;r:d5;mx7w2d4- i 1wsual resistor connected to the battery. Which one of the following choices best describes the direction of electron flow throiddi 4wrlsab1 9 iiam x:;u twp-p572;ugh 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_______9 9* jgf7ya*obvo)ram__each resistor is tjogo a9va f)*mb9ry7* he same.

  06.33: A current through the thin filament wire of a lightbulb causes the filam.pfbi (u su;xlxpc2,/ent to bec .p b(l,uc/ 2sp;xixfuome white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is t6g; :,fhuljef*kz 7y ahe acronym for wkaygfje6 *, 7:u fl;hzhich one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional a9vykpb/--ko7tmfd x; cz l8 2qrea 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 resistivlxptm q2ok7vy8dkbz-fc ;- /9ity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same materi6ia 7oa*ya5jrolwaf6i( b ( t 4q/ gs/z,xdiy)al. Wire II has twice the diameter and twice the length of I. If I has resistance R, aoaiy ib t,4 /wx*/szlf(jir5 )d6g( y7oa6qaII has resistance

  99.31: Wire Y is made of the same material but has twice7rqwe:p3s22k z (riy imw:1 nt the diameter and half the length of wire Xs2z 7wytkre q13m iw :rp(n:2i. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r.ceh0.vb2 mcondjz e+;r+m0d/ This piece of material is then drawn so that it is a cylinder with new length 2L.+o0rhjv/czd 02.d +bme em ;nc What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wank8v b8l;kv+qpts to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in ok+p ;vb8k8l vqrder to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are m+ afvw:5 6m9s khnurb(ade of the same material. The length and radius of each resistor:unwsv6h5+bf9km ar ( 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 in the ; 4m9f1khtjfnfollowing 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 r1hmf;t f9j n4kesistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has i*o x/vb k:4xstnt8 yt )dnd3t(nternal resistance 10.0 kW and the ammeter has interna:yt (*knn48dxsbovtt /d )xt3l resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit j .ya;pk:ozcewb b71lh-7m+nvpc 24sshown to the right. The three bulbs 1, 2, and 3 - represcpp o-bnvc ;jem+72lbwak h4zs7.1:yented 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 thedumz1ebho 88s0ae/n , x t* yx7j.ylm; right. If the current in all three resistors is equal, which of the following state s. enb8m mh tz,*/y x87;ouaj0lexyd1ments must be true?

  99.37: The diagram at right represents a simpl;b / dy6y7sc ah0e3g np:o p0v2;gffxle electric circuit composed of 5 identical light l/ n fhs27gbgpy0y;vd6p e foa:3cx;0bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the foll we;v+j8.dtnhowing statements is NOT true concerning the simple circuit shown where resistors R1, R2 and;nje.vt8+ hd w R3 are have equal resistances?

  17.29: Two lightbulbs X6 x1gwk(q tx9h andY are connected in series to a battery. Bulb X is brighter than bulb Y. Assumex6wg1 kxht(9q 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 observed?

  06.34: How many coulombs will pass throu+j( 2if -szvq yeu,ci8gh the identified resistor in 5 seconds once the c- sjvzy,8ucq +ii (fe2ircuit was closed?

  00.23: If all of the resi lrd/y8es/rro) r2j(estors in the following simple circuit have the same resistance, which would dissipate the greatest powj lr)e ysdo/r/(r2re8 er?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω resdg bn w234rw;gistor is grbnd4gw;32 w 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a batter ,d iyax;)md/+qv gvr5y. Suppose R1 carries a g/d+ q ,dvma y)x5;irvcurrent 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, R,y3uzzq - z-gd ukalh7 t0ax6:2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3y gzzdzhqk u,xt- ual-:670a3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is the m4f hf,2 *tjeq:xg*l hiaximum value of fx:,jh* geq fi* 2t4hlthe current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 18(xj1 iswg(zh)ie-4zc n3a pt 20 volts?a1 3we( z hji(- g8zxi)ptnsc4

  03.09: How much currentrt cufiv8v75 9 flows through a 4 ohm resistor that is dissipating 36 watt75vf8tic ru v9s of power?

  05.21: A household iron used to press clothes is 9qf55frxnk ;ftx3s3;)i +nw hb+xemr d11au gmarked "120 volt, 600 watt.” In normal use, the current in it uf;dfn+ra 1xt35m hs;13rxgki9n)e+ 5 wxqfbis

  01.05: Which of the following resistances could NOT be produced by a c i1i 3dpgva5 myf.g27 df;5yibrgc-;kircuit containing .d;i7g; 1ryk gicp3-5f2ad y fb migv5only three identical 6Ω resistors?

  94.37: You are given three f/c ezupvtj69 yi2l/: 1.0 Ω resistors. Which of the following equivalent resistancee fyp6c:tl9z2u v/i/js CANNOT be produced using all three resistors?

  02.06: Three resistors of .bx-(ej iqty4 w*+csrdifferent values can be connected together in different configuc w i4tj.s ebr+*(xy-qrations. If all three resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resis8pzv97t:/:buisybk+ywz 6z5 zpj p h5tor is connected 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 intern jpv/z8bk:uh7p zy 5yp: 69zz5bist+wal resistance of the battery is zero.

  96.16: When two resistors, having resistance Rbo ;ae *(jx.ku+zx4jwr k72ti1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements 2+i*x k 7;earxkjbt.4u ozj(wabout the resistances is correct?

  02.46: A hotplate is designed such that it ha2(0 w39 zofeiy k.(vjzq mptw,s snh7(s a resistance of 12Ω when operating at 120 volts. What is the m s9 0kz7vzo 3n2,h(s .yw(efw timq(jpinimum 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 through a 4 ohm resistobq2t.kzegfx *k 5h, v/r that is dissipating 36 watts of po,zke5/bx k .gqfvt2*hwer?

  01.24: An electric heater draws 13 amperes of current whenxa nvaz 0.f1i5 connected to 120 volts. If the5zx 0avi.a f1n 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 cost to keebnv/y zf7j1h:y crg +dhw :w3+p a 100W lightbulb lit continuously r:y+njdh/ 7cbg yfz:3wwv h1+ for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results v8713e zz cvrhevi )0min a power of 24.0 W associated with the bulb. Which one of the following choices )vr v 8ve7izm3 z10chebest represents the resistance of the lightbulb?

  01.10: Each member of sh.mec/u+ s.x/b sy)ka family of 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 fusex k)hbs/.sy/s.mec+ u, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to formi6ki*gtopep41 lvs6*: : :tq vqy0pqg a simple circuit as shoty61oqp:p:40q*g teqslv g:k *ivpi 6wn 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 resijgv91vq 7ul +ks,d7nostors to form a simple circuit as shown to the r771on9 v gl q,judvsk+ight.
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 iz) n4wr2ysg(, a switch and three resistors are connected as sh) yr ngwis24(zown. 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 switch ay36(a x1bs 5(0c rjgw+ir alxhnd three resistors are connected asib(1 rx0hxr+(jsw y ag6l3 c5a shown. 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 da9eo:j-ci5ryyoj ; d x/+3gcthree resistors are connecg/o ox: r5d;cj ydjca9y e+-3ited as shown. With the 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 shown to the right, what is6/jh *+ivf tfh the equivalent resistance? Assume that all wires are ideal, the battery has no internati*f f/ v+hhj6l resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right bq lm;io09za1 with resiba 0 oql9zim1;stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical ra 7mi*jm54 recz)wj bd*d h(w4esistors connected in a combinatio*a4(*4bhiwj 5c )mrzewjddm 7n series and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram belbn+soin xo8 +1ow shows five identical resistors connected in a combination series and parallel circuit to a voltage source1o++x in snob8.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical.-/b 5blm5 a5d +ohbrzg Which bulb will be the br-z5bgl+mdrb5 ob/5 a hightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors ar ry0cpwl:+w 85brnu6k8 ri :rce connected as shown. With the :p 08k6wbl ru8c:yn wcri+r5r 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;ia 0+c.mwm x7x ,nbku ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter um0, cxb +7awixmn;.kreads 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 resistors x7ww pj s2ni*,qby3 l;are connected as shown. With the switch open as shown in the diagram thwq*y3 s pxw2; ln,ibj7e ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?