16.09: In the circuit shown, an electd:o .u jw31by p;4kkadric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the direction of the ele.yd3jk wb up o4:da1;kctric field through the interior of the resistor?

  98.06: When any four resis-yfpt+-w 2f mttors are connected in parallel, the_________each resistor is t-+wt-2ypfmt f he same.

  06.33: A current through the thin filament wire of a lightbulb causes the fil ckqw/zo ;3lv5ament to become white hot, while the larger wires conz53 /ko wqvlc;nected to the lightbulb remain much cooler. This happens because

  13.08: Some standard househol6p fg3wazu 843x;y vrnd lights are being replaced with LEDs. LED is the acronym for which one of the following3;p n834vx ru 6fgaywz choices?

  05.16: A cylindrical graphite resistor has length L a:q+ j l,*f)qid/2rxd u3a kexqnd cross-sectional area A. It is to be placed into a circuit, but it first must be cut in half so that the new le+:,e)qqqj d ri23udxf/x* kla ngth 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 material. Wij2/:wn tzplb4b e 9h,ure II has twice the diameter and twice the length of I. If I has4pt nlu9z: hbb2j,/we resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twi c-e n;qyltahhc0q6)5 ce the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would h0h6 c;- nq)htl5yeq caave a resistance of

  03.23: A cylindrical resistor has length L and radiu/b: jc v;pgvsh)t ,hnfs:6cbj)jd3 a/s r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to thebv ga ,nf6/c:)b t ph3/jsjh:sd vj;c) resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulbh/th mcj4 b95y. He decides to modify the filament. How should the filament of a lightbulb be modified in order to makeb/h ycj94ht5m the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resu8j m ksl5sfqa5 m5oz,5zj8:sistors are made of the same material. The length and radius of each resi 55a8sluk:8zsj ,ojfm5q mzs 5stor 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 resistanceelqu )t*:z(- j jz+uiv R, are connected to a battery 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 qze() *: ziljj +vu-tuthe equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter i 6y h*;z78y yf c-jklddwo;x/kn the accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has interk- yhxf7zly owdkj*y/d8;;6 c nal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the righs31kisx yg/ +at. The three bulbs 1, 2, and 3 - ss1 ayk x3i+g/represented 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 the right. Ien, ;te, r8smd ef-*i7ac+tx qf the current in all three resistors isftsnt-eeax8,e dr 7 ; c*im,q+ equal, which of the following statements must be true?

  99.37: The diagram a1yam8u4awjfzz 6 i,/ zt right represents a simple electric circuit composed of 5 identical light bu68ui m 1zwazja/y4zf,lbs 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 the simple4aoq *p/vjp 9a xd(;bp6iu5wsk ,cdi; circuit shown where resistors R1, R2 and R3 are have equk s v5qb9/wd6ao( picxu4dap ,p;*;j ial resistances?

  17.29: Two lightbulbs X andY are connected in seriezlvh7 q q b,p868p2usfs to a battery. Bulb X is brighter than bulb Y. Apl7pq6zbquhfv8, 28sssume 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 through the id,pkqrmv73wvql , *e;z,)aotgentified resistor in 5 seconds once the circuit e,)mr qop3k,w*tva7;gq v ,lzwas closed?

  00.23: If all of the resistors in the following simple circuit have yfsmxrph*+( - e;rsy)6jwlr. the same resistance, whm)j p r -wsr6 (y;xy*+rf.lhseich would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 ,ajzj g:ogqp,9li*1 f Ω resistor is 1.0 A. What is the power supply voltage V? a,oq9 f*l:1z,j piggj

  97.27: Three resistors R1, R2, and R3 are connecte41m-v)b dnpr3r/y nkk.0udq ed in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.01r4n)vd ykknm q-3/.b p 0uerdΩ, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three differencjlcoq s fz px3x 7yn* z-47h ji.(cudv-b:/d0t resistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, fxzj0yi3nd7d .47oq bv cc h*xz-lu(cj/p-s:and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What isq ,. lrdq3p-oqeef( l( the maximum value of the current under thlf -d,q(p 3q(l.ero qeese conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed tlrss 4v0* fuu62ysn: tpup7j 6o operate at 120 volt0p j*2sly rpn u4s7:fs6uu tv6s?

  03.09: How much current flows throughkrw.zu1li: pnl/e.,vo, ; q4:bl xqgr a 4 ohm resistor that is dissipating 36 watts of:,gn4plr lb /; x.l.rqek:i uw1,ovqz power?

  05.21: A household iron used to press cl/qd.+c2 xb5szbyi4y ,.kj vyjothes is marked "120 volt, 600 watt.” In normal u+.xyy4bcz d k/jsv y,.2b 5qijse, the current in it is

  01.05: Which of the following resistances could NOT cx l5jv-,x/a1,+ 5nkws9 ew.crp xnjzbe produced by a circuit containing only three identical 6Ω re9 x+nvasej , c-c./k5r x1,wpx5l zwjnsistors?

  94.37: You are given three+0m3cmw v8g om jlh19t*rh.a h 1.0 Ω resistors. Which of the following equivalent resistances CANNOl9m go 1vwhm0. j8 m3hc+htr*aT be produced using all three resistors?

  02.06: Three resistors of different values can be connected toge7):sy1ab p29x frc fa4jfxpx1n14eifther in different configurations. If all three resistors are used in a circuit, how many f17f2j 4 xanpys x1x)1ri: ff4p9becadifferent values of total resistance can be produced?

  97.35: When a single r 7e y;-qmnfs)iesistor is connected to a battery, a total power P is dissipated in the circuit. Hofne q;y -7)ismw much total power 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, havikbe,l 7n .)* luw-ui9f h/pdipng resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination.h*lp)ib,fu u9k-n dep 7w/l i is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed wc3zjo epy:6i*eh k+- such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to j*wykzcpe+i :-e3ho 6warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm rexnnmk+2v+yp d f:z )3asistor that is dissipating 36 watts o2nmd:+ knp)f z3va+yxf power?

  01.24: An electric heat:*qcm 4yxfe+ber draws 13 amperes of current when connected to 120 volts. mf*c:be+q4 xy If 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 cost to keep a 100W lightbulb lit conti k,sc.csk;s,ckeoe zc (e8w32zhg (h wb*-e.fnuously for 1 year at a rate of e(kz zfese.shwc c8 ;h 2(o-sccw ,3kb*,.gek $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbu * 91i1gj6yfu,hhyc fqlb results in a power of 24.0 W associated withf9 y1hhyc ig1j *6q,fu 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 w xkdj,0 c(. kl , ;wanlmlo0o1qr*j4skatts 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 computers can be operating,* , 1xkl4j rk.0dolwcq j onakml;s0( at the sametime?

  03.16: A 9-volt battery is connected to four rsmx m;bsl s4z0av4.r /1tr1 ybesistors to form a simple circuit as shobssvr r.s / 40;mx1ab mzly14twn 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 connjdy: if ,3yzy)5wi /wnected to four resistors to form a simple circuit as sh/5id zfyn: wi)y jy,3wown 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 a)mk1zldwrcfkl0- x)n 3 2os2smmeter, a switch and three resistors are connected as shown. With the switch open as shown in the diag13sczdk owmls nkf0l)x22 -r)ram 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 thro6jvgm7y(i8 .kq+ qjph) xch+ee resistors are connected as s.+i7vyokqg 8 h() x+6qc hjpmjhown. 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, r9,i8kxa7 fek2uu:gb(kk u4fa switch and three resistors are connected as shke( x9 f,8g br24u ufua7ikkk:own. 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 is the equivalent resistan-qg:e00c o54d ep gwcvce? Assume that all wires are ideal, the battery hasev: - weqp0gg4od5cc 0 no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuil :,sj1f dcarsn5(b 6f1zlgpypv.k5/ t shown to the right with resis . 5lc:1 b(,p16y/s zdfk alnspfgjvr5tances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows fbdxq0t m z80l6f3 bj ql,c-h)uive identical resistors connected in a combination series and parallel circuit to a voltage sll qh03j0, d8fc xbq-mbu)6tzource.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors 6).ec a8q0gcaog(wj) dzv8 +tmemr+ uconnected in a combination series and parallel circ(ecw dg.vmjq8za 06e + g8)+arocm t)uuit 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 identiisd78rfc69h i8,ueb pfrq; dy4-bo3w cal. Which bulb will be the brighterfb d6d ii8q8;ybup7 sr-w eo,9c4fh 3st?

  02.21: An ideal battery, an ideal ammetelcngc l2q. ;uc-(u z;xr, a switch and three resistors are connected as shown. With the sw(z-uccnux; l ql2g .c;itch 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 resistuqrthc -0 ;zws wjh /pi95t(*;1ivk ;vxup4yaors are connected as shown. With th *w;h5 s1qpyv(9 4p-t;kuw/hz jrcxt;vi0aiu e 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 resistzp4h0+) 6 m pfxkcte 1smz//clors are connected as shown. With the switch open as shown in the diagram the amfzm)zmte/1p4 6kch+s x /0lpcmeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?