16.09: In the circuit shown, an elecfgml5 t */8hlntric current exists in the metal resistor connected to thf*lgtn5h 8 /mle battery. Which one of 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 resistors are connected in parallel, the_________each reshn;- tvid /l)wkxl juy5-4 lbcg,:9kv :bzks1 isto-5l1v,bv: )s: ;bnxwdk/t-l j ukkz gy lc4ih9r is the same.

  06.33: A current through the thin +nw+7 pt4 ze ovha):3shcq/ cgfilament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain muchw73h c)czq4t en:++ /gvapsho cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is bk xjk82z) o0zthe acronym for which one of the fk z)o2 8xbj0zkollowing choices?

  05.16: A cylindrical graphite resistor has p abdoyv,/98f3wkr-d length L and cross-sectional area A. It is to be placed into a circuit, but it first must be cut ibpr ,f9woyvd8/d 3k a-n 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 wircf :35 qamzn vcl4ua37e II are made of the same material. Wire II has twice the diameter and twice the length of I. If I 5v3ac 3mn f7l a4z:ucqhas resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diametypb/mu r5+ 1:/wzm *hy.z3)jwdeeju her and half the length of wire X. If wire X has w/juw5 )e. dh:e y/3b m +1*zpuyzhjrma resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and r0d.ztriw3x* :f tvq+qadius r. This piece of material is then drawn so that it is a cylinder with new length 2L. +qxw if* t.tz0d:3qvr What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a bri:xx4rppi c5 a,ghter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in p4ci r5a:px,x order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors ariyfd/d -06ly +iijnyy f o5q.7e made of the same material. The length and ra0dil in yify6oq5yyf -+d7./jdius 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 t r )c tg9vpog6s3h30dm5g3jq ho 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 serdgmhj933co0rg v 653qh t ps)gies to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in 3 igz m11k,bdgthe accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1bd3 1g1i,zgkm .00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbsyl7r jq(4 hcl chop;b 1i8qc8( 1, 2, a7(cq1 jcr8cly4lq ;b8oiph (hnd 3 - 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 electrlw(im,orri n .6yzpj 8wb6y6,j q-*xb fsc:;xical circuit at the right. If the current in all three resistors is equal, which of the folxy jro6(f:zjpm-*8w,i q6 b.;l c nwys6b, rixlowing statements must be true?

  99.37: The diagram at right represents a simple h30lpdz.gb.9mch aqa9ghw 5* electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bul q3cb0g *p..zg madhha95h9 lwb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following soa- .0x9pkalzq*y hj;tatements is NOT true concerning the simple circuit shown9*axk-ao y qzjph0;. l where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are c;97m0a 5n(luqgmifz ronnected 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 pig9 5(ur 07flm;aqnmzarallel 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 oiz:hw4 rxt/ m zb(x)x(z18yl through the identified resistor in 5 seconds once the circuit wa z1xy(i r:x4)b mxzow(/tlhz8s closed?

  00.23: If all of the resistors 3cbv+;yjd 2qo;zy w *d in the following simple circuit have the same resistance, which would disswv+d d;2qy*b3 yz joc;ipate the greatest power?

  98.34: In the accompf5v/ -ol-gc02y p8ufz jy5zdaanying circuit diagram, the current through the 6.0 Ω resistor 8d0-zvo 5yp-j/f z 5fgla2cyuis 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are 70b7qegkd4bg h a/hv4connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of4 h70bqad kbv7ggh /4e 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors m daw96gbvd+lt; u.4qR1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. W9ba; utdw 4gm 6.q+vldhat is the current in R3?

  99.13: A heating coil is rated 120 or1.mfwe +nv-rq5v:l 0 watts and 120 volts. What is the maximum value of the current under these condition 5.v-o: lrmnwf rqe+v1s?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 120 ht:bzvw z;j:mh./lw+ +hj;w:.w mzlv bzh t:/volts?

  03.09: How much current flows through a 4 ohm resistor that aebg,1q0 pp: tis dissipating 36 wattagq,0b: pe 1pts of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.”/goy e ,ns5k.*zull:w In normal use, the currezs*:w.g /ueln5k oly ,nt in it is

  01.05: Which of the following resistances could NOT be pfs7i0 c67y0+ba bnl y9pwnb+w8z 9d ovroduced by a circuit containing only three identical 6Ω r78pw cy6 7 f0wv9aondl+zbib9+nbs 0yesistors?

  94.37: You are given three 1.0 Ω resistors. Which o te7t(p*wdaz; x4fyo 3zt r3q7f the following equivalent resistances yw4apr q 7ztfx zd*t37to;e(3CANNOT be produced using all three resistors?

  02.06: Three resistow+ai/esl 5;( mh yhgl0rs of different values can be connected together in different configurations. If aa0ly5se i m/h;+(h wlgll 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 total power P is -*crbpafh 6 e3dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are co63r b h-eafpc*nnected 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 connecbu ;a 1i8;j keo9n)y6i 8fawm.c:rn zqv-x q+eted in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistancw1jac;o;qr8i u) -ze: kxn.v6f m+i 8nay9beqes is correct?

  02.46: A hotplate is designed such pfnyr5x:z5r- ocixv,+ 7mta4 that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg of water fromx +5i vofz4ca-n rt7y xr,5:mp $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows throni a-a;u4n9miugh a 4 ohm resistor that is dissipating 36 watts of power na9i4;in- mua?

  01.24: An electric heater dt 3ozwrkb*1 .araws 13 amperes of current when connected to 120 volts. If the price of electricity it kzr1a3w.o*bs $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how tlvaec0(z znb.o*6 n1y( 5oqqmuch would it cost to keep a 100W lightbulb lit continuously fot1( lb6q0 5nz. cyvnezoqo*a( r 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through 50+mc6/n veiky(,ymq-;si 9 qwh mbufa lightbulb results in a power of 24.0 W associated with the bulb. Which one of vim6s(0q ;b5in+u ehmm yqw-kcy/9f,the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family ouez3j :ki8vy7f six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuiy:z7 veu3 ik8jt protected by a 20 ampere fuse, 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 form 6m: sfbm76jxua simple circuit as shown to the rim:bsux 667mfj ght.
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 to for-ppxh6- +cwo zgq,9w5fh8lglm a simple circuit as shown to p,hp5h wz qo-lw 6fl9xc+g8g-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 three resia-/rd0t jrwb bu.r+1 istors are connected as shown. With the switch open as shown in the +0uwbj ad. /tri rb-r1diagram 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 sh; ir( tm. nc(kgi6lu3witch and three resistors are connected as shown. W(k3 im 6cu(g.hi;trlnith 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 res.dd 90d4otnhp istors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.4odtd 90h .npd0 amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit hn:wd*ie0x (p wuod; /-zkv s8 shown to the right, what is the equivalent resistance? Assume that all wir zd* nhwkxui epw0v:ods( ;-8/es are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit sh +.e86umy kgrhown to the right with resistanc+ek urmy. h86ges $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a comb : qt5*b.ct,h1n f,mwmgfo 0qtination series and parallet:qb,5nt0.c oq,*mhm 1tg f wfl circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors cl2 n.f t8kkp c)jkra-+onnected in a combination tljc-k) 2k pfkrn.+a8series 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 are identicalrra-ibz,: j **69nmdls b8 t-rxp f:nron;e0b. Which bulb will be the brig: z:; r*d,tsobne n 9bfa-lji8b r60xrn rm*p-htest?

  02.21: An ideal battery, an idea1bwt,ig.dwe h vs.2)ll ammeter, a switch and three resistors are connected as shown. With the switch open as shown in thtswl12g ., bhwvi).ede 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 switm 8ah+,s 8zxoech and three resistors are connected as shown. With the switch open as shown in the diagrama he8sxm8+,o z 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 ammeter8hpv.,v0/g var qijr;- f)joj, a switch and three resistors are connected as shown. With the swpf jvrh)/r,0av;-qj.o8ivj gitch 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?