16.09: In the circuit shown, an elecanpj1ni9 (;e( ez/xrxtric current exists in the metal resistor connected to the battery. Which one of the following choices (i(x peez/jx 1rnan9; 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____eho0+/uf 1d zx_____each resistohu feo1dz /0x+r is the same.

  06.33: A current throug)lzr5 v5z p-k 7tisy;kh the thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens t5 ilsrk-y k)p7zv;z5because

  13.08: Some standard household li bzl,jzf8ng, 8ghts are being replaced with LEDs. LED is the acronym for which one of the followil z8, ,8fjbgnzng choices?

  05.16: A cylindrical g ;7p* *k6 miv 8.5va8k zsy5ftcwaavqrraphite resistor has length L and cross-sectional area A. It is to be placed into6qzsvwm;a 8 5.k7y8 rpkcat*v 5vf*ia 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 II are made of the same material. Wire II has twice the +njm ejp8,)qy )omfs+diameter and twice the length ofoyjj e)f+n,+ m8 pmqs) I. If I has resistance R, II has resistance

  99.31: Wire Y is made ofyp4 x*kqpcif3)h3n- w the same material but has twice the diameter and half the length of wire X. If wire X ha4pcwh 3yiq3 *x kn)-fps a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length Leb 3r vhiux:/, and radius r. This piece of material is then drawn so that it is a cylinder/3re: vuhi x,b with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decides t5(slyb+d gm; mmr 02nno modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at b5;sl n20y(+ gmrmdmn a given voltage?

  16.07: Three cylindrical resistors are made of 4-e1wd4,ph *seqk ptl the same material. The length and radit , -epwp4kq*he1 ds4lus 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 to a battery in 3zj-lc(xf 4- .+f :hszzv avcmthe following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to3(xcf :vc-v z +.zafshjm-zl4 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 circuee69 )y*9rc9c,md et qx5vj;o)yyr jy it diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohmy*yrj)eyeye6 cc9, oxv9j9tr)5dm ;q. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 16dq64 uaie*r r, 2, and 3 - represented as resistors e4r 6iur*q6ad 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 et5e/4f4w 26pxpcnfqiio 7pk; lectrical circuit at the right. If the current in all three resistorstexp;fnip pi6qo5 f / kw47c42 is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit c9hp+d7lo;p72 g .abp5;law0gqe rstz omposed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bua+2al 7wzrg; ptpe.bpsq79dl h 5go0 ;lbs)
would you expect to be the brightest?

  00.03: Which of the following statements e7 zwrvw il.0d7bb8v- is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resistances?bv 77e0.-v lw iwbrz8d

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X i r0el 7tljzf u58 b3eq2vcg6k0s brighter than bulb Y. Assume all circuit elemf 3 8ce2 vurzl jq0t7l6k05egbents 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 wi3 d roanrvsm+b3v5,;v ll pass through the identified resistor in 5 seconds once 5v3,+3ravv ds;r bomn the circuit was closed?

  00.23: If all of the resistors in the following simple circuit have fh:qfn a;w*5 ksal3j qg2j3i/the same resistance, which wouia/ hja:wg3qqsf *532kjn l;f ld dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 k2g/r2 xpx(tig d:4qo 06mvbtΩ resistor is 1.0 A. What is the power suxogmp2ixg6d 2rkbqt0 (t/ 4v :pply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery.6tm 1oy n w(2r36ncwzb Suppose R1 carries a current of 2.0 A, R2 has n3wn6yro2mct 1z b6(w 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 andR3 a v9pep4- 7vzicre connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is t9 i4pvpv7-cze he current in R3?

  99.13: A heating coil is rate9mg 1pps /w1b ,7s. e;qfxsknod 1200 watts and 120 volts. What is the maximum value of the current under these con s;pe.fwgn s m b/11,oqsk7p9xditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to o4h9mli4 rap 2mperate at 120 volts4 4h2lram9ip m?

  03.09: How much current flows through a 4 ohm resis c;*k7dx u9whwtor that is dissipating 36 wattk ;w hwu79xcd*s of power?

  05.21: A household iron used to press clothes is marked "12p2ogyzpp *v)51y d n 3gw3a(:wtnz :i8a7idj p0 volt, 600 watt.” In normal u wy:z zv*2a1o3dd 8wa7npngjyi) :gip3pt 5p(se, the current in it is

  01.05: Which of the following resistances could NOitjw 3y12w py+z* ;ymzT be produced by a circuit containtyzm3*j1z+2 ww ;y ipying only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the)j1qg;-yup sy91xbes/mf2fh )h1g xz ( (occz following equivalent resistances CANNOT be produced using all(cx/(u m 9bj;o1)g2h fczzq f1spy g1e hx-ys) three resistors?

  02.06: Three resistors of 8whs) l63) wm4wnr alvdifferent values can be connected together in different configurations. If all three resistors are used inr8amwvwl 4nw)h)s63l 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 dissir 7 8,qggnt6zipated in the circuit. How much total po tz6,gin8 rqg7wer 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 resistone()eli* i8qx rs, having resistance R1 and R2, are connected in parallel, the nl(i8 iq e)ex*equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it hask;z1rjvbu e 2;j40;a zyl-u8mf t)lp i 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 f -mjzlky 4tezv 0p ;u2;a ;)ij8bur1lwater from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor tha 2htzh veum;iiw:y8,0f yix3-) w1nel t is dissipating 36 watts of pox i -i;0 2hmwilv:fyy,83)eue1z wh ntwer?

  01.24: An electric heater draws 13 a;czy4 3khrbz(mperes of current when connected to 120 volts. If the pr yz(;rkzcb 34hice of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much wo:-r7e7rv) ;4 bwze)eeoho zs5,j db zvuld it cost to keep a 100W lightbulb lit continuously for 1 year at a rate o7z5;vobevh,: r j4wdore)z z s-7e)bef $0.10/(kW.hr) ?

  12.09: A constant curii8 gyxej6f -nr-h3m 0to+yw .rent of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best repmh+ ef03- r it ngx.-yyi8o6jwresents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at j hyu4w7p9vs9d 0 psbom)o(w13rnl- l500 watts in a 120 V circuit. If all computers are plugged into a single circuitsdl03pjw so1 4-vlob7rwm pu99h(n y) 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 f 0ey5)b jckn5.3 pzlqaxa(:vf our resistors to form a simple circuit asxec5nbfql)ay ( 3z :.a50pkjv 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 resissbxk :892(d0mhbh 8cn*dbg oh 5ucahbuy(( w 9tors to form a simple circuit as sb ygh: d5bcau (d0 8bohxb 9h29n(*(mw sch8kuhown 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 three resgtf.zt0*t h,f istors are connected as shown. With the switch open as shown in the diagram the at0,.f*f gt hztmmeter 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 id fwl)dshwl( );/vzr/deal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampere/ )( z/l;vdwd)wrlfhss.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an id9n eq095s6l czr(t0 kwcf75y nf+cqvueal ammeter, a switch and three resistors are connected 5zs+0 0yuft9l9f7q5v(cnecqw nk c6ras 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 is the equivalent rejvw o419iou 5zsistance? Assume that al1o5juz9i4 owvl wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shownsxfh-9*ghl34q :z d;1ftz zpl to the right with resistanc 9d1q hgpf:h* lt3zl 4sf-;zzxes $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five idj (;b,-7pk+bd shojdlentical resistors connected in a combination series and parallel circudpb, -7 +joljb(k ;dhsit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram br jcal*d6+nseh3d7 1ielow shows five identical resistors connected in a combination series and paralnldc 6shei+7 da1 jr*3lel 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 are0s 3splf70. m+ye1vg eel:hhx identical. Which bulb will be the brightest?hfm xl3 e+:e.7p0gs sl10yvhe

  02.21: An ideal battery, an ideal ammeter, a switdrjmmxi/r *e 39, b3ffch and three resistors are conn ie f,*mdb 9rxjf33r/mected as shown. 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 and three resist0hw8v0h/v l;1 s-nvk zfcocp9 ors are connecwzvk-;oh9/ lc1c nvp 80vhf0s ted as 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, t a 5sr/9-myvqan ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shotqr/a9 my-s 5vwn in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?