16.09: In the circuit shown, an electric current exists in the metal resistors z;*: 7q a;go cg*kc:kallue3 connected to qage3 o7 sl: ;akuc g*z;*lkc:the 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_________eppg 76l, /1 uyrhjwm9pach resistor is the p9 7ylp1 rjugh m6pw,/same.

  06.33: A current through the thin filament wire of a lightb-n-iifpp1enw/sj s d dm l0, 1ljxi;j66x*-xiulb causes the filament to bec --jssi;1m eli66/xii d1-xplj, nfw ndx*0pjome white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard househoofb/ll, cx++tld lights are being replaced with LEDs. LED is the acronym for which one of the following choices? cb/l +x,t+ofl

  05.16: A cylindrical graphite resistor has length L and cross-sectional areie;q)k;*e bay4bf imdk8 06z wa A. It is to be pla8d iky46e)baiz;b f0weq k*m ;ced 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 resistivity of the cylindrical resistor?

  98.20: Wire I and wire I;s8 .jwm+1n :v;s8vbolmij pwI are made of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance os.lw + v8 nm;s8;jjmpwi1:vb R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diamete*t fvl;tn5z5h xh.576 hxs dszr and half the length of wire X. If wire X has a resistance of R then wire Y l7x5nh vs dfh.;6h5txz*s tz5would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of materfr sny--1tz8 y-dle hte-g) ,sial is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material because of thisfys-)tye-d1e, l s g hzrnt--8 process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. Hepfe 52atx)wo4p5ix q1 decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light a )1wp 55axt4ex2 fiopqt a given voltage?

  16.07: Three cylindrical resistors are made of the same materia 1yp) 2dfw0 qgd-yaf(gl. The length and radius of each resistor is:gwa)0 fy(y-gd21dfpq
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, arwv,iv5xmd iyz:7u g;*e connected to a battery in the following way: “Two resistors are connected in series. This comvdgvxw,mi 7u* ;iz5:ybination 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 circ23 k9tj7kibdq uit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. Thitd j732 bk9qke voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. Thv6h)o)a6bu(s 5wmaf ue three bulbs 1, 2, and 3 - repre )6a 6vumof(uhb5s aw)sented 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 righe2c5i 3okf,get. If the current in all three resistors is equal, which of the following statements must ef ,ik ego523cbe true?

  99.37: The diagram at right represents a simple electric circuit crzrk:l79 3x0qswf*y pomposed of 5 identical light bulbs and 2 flashl:w 7ykzs9rr03*qfx p light cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements n 75oijkmdhnw 4t -f:+fe;am 0is NOT true concerning the simple circuit se nfmomtw indh:a;5 f+j074-khown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connec) g,ygpuaww/ixmobh)-.,+ auted 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 parallegm+bu)a,gy /x iw,.ua-) hwopl with each other to the same battery, which one of the following choices best represents what is observed?

  06.34: How many c9 2ufjwb ev:i5wnsg,1 wuj6b(oulombs will pass through the identified resistor in 5 seconds once ngwwj b:6 ,e wj 91b2su5iu(vfthe circuit was closed?

  00.23: If all of the re35yuwt5twarc* u9* tzsistors in the following simple circuit have the same resiza5 trttw*9u35 yc* uwstance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current tht9a+s a/du4ai/zscqwn+r; 9x/ 7p ln vrough the 6.0 Ω resistor is 1.0 A. What is th rs qzcn+9 /iutps4a/ax 7l+;avwn9/de power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in sow:db60v+/f sh cbj *zeries to a battery. Suppose R1 carries a current of 2.0 A, R2 h:hbvoz f*bs+/d 0c6jwas 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, R2 ;fb 9u ,mop3ujandR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4;mopb9j ,3ufuΩ, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts hhwaedziy42x6s(hoj )// 6uk and 120 volts. What is the maximum value of the co2exz u)(/6k/d4ysh j hahw6iurrent under these conditions?

  99.23: What is the resistance of a wng3 s5a ohf2t+.6k0 +xk j41wvr quol60 watt lightbulb designed to operate at 120 v0. f+auxhgw2 o+k s43 wo6q1n jv5kltrolts?

  03.09: How much current flows through a 4 ohm resistor that is din64 1mx8) w :gcrbzfqfssipating 36 watts of 1qx:gfz8)6 bwmc4 rfnpower?

  05.21: A household iron used to press x,fc h(-ld4dpr)( zco4gzt7bclothes is marked "120 volt, 600 watt.” In not- 4crgb h(c7z)o( ,zpf4xdldrmal use, the current in it is

  01.05: Which of the following resistances could NOT 7djcgx,sfcm3x - s/*w be produced by a circuit containing ojs fxx-sg*c/,wm3d7 c nly three identical 6Ω resistors?

  94.37: You are given three 1.0 , 1:xnvgvz2q66b tb2ird jd 6hΩ resistors. Which of the following equivalent resistances CANNOT be produced x i:nvbd6 v2,rtz6dh1jq 6g2b using all three resistors?

  02.06: Three resistors of different values can be connected-aoetvg sjmy-1 :( .hj together in different configurations. If all three resistors are used in a circuit, how many differye .1tg: (j-sjoamh -vent values of total resistance can be produced?

  97.35: When a single rg, mi fv*ikteub e8)j4l1w45 gesistor 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 sam45meiuge1t, i jv8)b fw4k*gle battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors*h35cbh ; dk8wfu 7bgcoqt3:o, having resistance R1 and R2, are connected in parallel, the equivq gdt3bc:*7fo ;uhkoh8b53wcalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such txrwaao*c( 1l.hat it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would takc.x*awal1 (roe 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 resistzfaj fq24d5c w6)y *nvor that is dissipating 36 watts of v )54cfw6* d qfyza2jnpower?

  01.24: An electric heater draws 13 amperes of current z 9mpto:-:x x kvgb0d )u.p.hrj*vhd3 when connected to 120 volts. If tz.vg)dorxbpu hp90 h*d :v3: mjx-t.k he 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 ,ltsavbk:3qn zs3j 3,it cost to keep a 100W lightbulb lit continuously for 1 s:vaqs3 kz,b3j nt3l, year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results inx2 6wits*sx4 z a power of 24.0 W associated with the bulb. Which one of the tx*s six 24w6zfollowing choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500d,+l yhgon6t b7ry5/w watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what ity +yh 5ln wbr,7o/dg6s 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 a simpl),a asr,nela.3g3f 8 obuv5cye circuit as shown toglave5bfou,38a ),a 3r .yncs 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 to form a simpl +g2q/0p.l sr(xj3p9r pwwtgfe circuit as shown to l0rp9(2t j p/wfqg3 rgp+ws. xthe 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 ammete +pe)4aiq)dcf55fi k+dgxj1 jw3b 5bnr, a switch and three resistors are connected as shown. With the switck1j)n+x)jbfd g 4ibpdw e555fqai+ 3ch 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, auvo (fhrq:r5: bc(3bb n ideal ammeter, a switch and three resistors are connected as shown. With the switch open f:3q (u brhrb:b ovc5(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 ammet (g18 xr*vh0 9vfno1yn azkc7oe,trd+ er, a switch and three resistors are connected as shown. With the switch open as shown in 7cxo v1za1r9 k*ynf o0hrnv8g ,+et (dthe 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 6gbvn-e p.e ;e+tr9kf is the equivalent resistance? e -.g+ 6vb9 eprnetk;f Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resis4b1wyhyl vf* ,tance of the circuit shown to the right with resistancl4,wy 1bhy f*ves $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below sjqfcy.wee9.4 *z uhv a:1xzzo2hwp84hows five identical resistors connected in a combination series and parallel circuit to a voltage sour1 8ywoj qhc:puv zz9 4zf.*awe2.ehx4ce.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resy2x3 g+-v rjibwl(s/;z oaa8qistors connected in a combination series and parallel cir-ays q8+;jl/vzwb3o irx2g( acuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all ofx46 qym+z nte3xo,ex3 the bulbs are identical. Which bulb wixoex34q +e3 ,zxym6tnll be the brightest?

  02.21: An ideal battery, an ide3;m*ai9y yri+fn t9 wral ammeter, a switch and three resistors are connected as shown. With the switch open as shown ft9riar9y*yiw ;3 +mn 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 t4odm dc6v/7 gwatj8.p hree resistors are connected as shown. With the switch open as shown in the diagram themaowdjg vp7 t86d /.c4 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 r:t : ftbfceu21 t0kcqqdbu*8p)bh( j0esistors are connected as shown. W80q 1bpcqct)f btbe (0:2: dujh*fktuith 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?