16.09: In the circuit shown, an electric current exists in7sbr72yji pl:.1szeya . 6hd t 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 electric fiel:ise 72ljdyz .sa.p 1hr6bt7yd through the interior of the resistor?

  98.06: When any four resistorsp 07j v7 umm4ybu/1sos are connected in parallel, the_________each resistor is the su p41y7vosu sjbm07m/ame.

  06.33: A current through the thin filament wire of a lightbulb caut q6iqez9 in06ses the filament to become white hot, while the larger wires connected toezq 0t6 9iinq6 the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. Lr2kv -51rb,vc1wnmrjvm)jf)8m f a8oED is the acronym for whichv12 vfmf,j1mroavrc )m 8 )w5nb -8krj one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area A.7-ic,4 +8 qrn,iqyk yxp5cyim:kazt; It is to be placed into a circuit, but it first must be5iim7c ; rcnk 4kpzqxq-+8y,,ytiya: 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 the2fiswz (n-- ;j5ud 4hnn a/hju same material. Wire II has twice the diameter24fn -jn w( z;hsiu-unhdja5/ and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same mater d,c(z 7kjnhi .:4fgzuial but has twice the diameter and half thehu4 7d,czgfnj zi: k.( length of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical r/z8t -mi j vgnc5a)rxq8g4fu8esistor has length L and radius r. This piece of material is then drawn so tha gg 8zc xu4vtm)jfa8-/r8iq n5t it is a cylinder 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 bright r3p:d 7vo.byuer light bulb. He decides to modify the filament. How should the fuvob: 3pyr7d.ilament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors jh5brbf+ p t3+are made of the same material. The length and radius of each resistor is:f+tp h j+r3bb5
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 th(v jj0:ig; sfgvijh j;s(t0 :ollowing 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 resistance of this arrangement of four resistors?

  95.35: The voltmeter in the ac (9 5 aer8j5krdr8nuleo/jz3 pcompanying circuit diagram has internal resistance 10.0 kW and the 98kj e3euzn p/raj55o(dr l 8rammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the ce48dzg oapuv+2vg:( dompound circuit shown to the right. The three bulbs 1, 2, ag+ (dzae v 4d8ug:p2vond 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 electrical cike .noncv(1m 6rcuit at the right. If the current in all three resistoe1cn(om n6kv .rs is equal, which of the following statements must be true?

  99.37: The diagram atr9/o uxawee cp;a/lg(83fd: )s5jncz right represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bulbs) zlsaw c)ge(a/: / dcenu8 j5;p9fx 3ro
would you expect to be the brightest?

  00.03: Which of the following statem1dow92uk0fo t vb3 7cments is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are h oumfv7901od3cwt 2 kbave equal resistances?

  17.29: Two lightbulbs X andY are connected in serx dhze4,,mr- vies to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with each other to the same battery, which one of the followin, xr 4he,-zvmdg choices best represents what is observed?

  06.34: How many coulombs will pazfds 0 ywr2a6nn5+xw +/we5psss through the identified resistor in 5 seconds once the circuit +znww r 2+es/6s0fx5wpdn a5y was closed?

  00.23: If all of the resistors in the following simple circuit hav2c jnpkr92 8 x6a;hwnle the same resistance, which would dissipate the greatest pnhw2 jcn8a96krx pl2; ower?

  98.34: In the accompanying circuit diagram, the current throughr*u:s; xfzini, n).ti the 6.0 Ω resistor is 1.0 A. What is the z:x. n;*n ,fsiriiut )power supply voltage V?

  97.27: Three resistors Ryw8css))qk , s1, R2, and R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the vow c) 8sys,k)sqltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to a fjt,x iu x8:-0zejn(k/9eqgtbattery. Suppose R1 haq /0 f8e-uz(e:kt9x ntxgjj, is 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is the maximumtr 5j nrgh4jg**4 ze+gg;xkv, value of thk4*x *r+;r g g ezjnj54gh,vtge current under these conditions?

  99.23: What is the resistancog7.xjlk3/ch j (xn 2te of a 60 watt lightbulb designed to operate at 120 volts? tnoljk .x3hgx2c(j/7

  03.09: How much current flows through a 4 ohxbo/p7s hyvg.v3e 7f 3m resistor that is dissipating 36 watts of power?hb .y/3 voes7fx pgv73

  05.21: A household iron used to press clothes is m 7 8 zapqr oupdzaim49q -mdr0e:;3ka.arked "120 volt, 600 watt.” In normal use,d -ae 9i mo;mda:3p rrp7zz0q.a 4kqu8 the current in it is

  01.05: Which of the following resistances could NOT bjee6uqp4xem j)a-3 5 oe produced by a circuit containing only three )e o6x mje5aejp- 43quidentical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivqjrxvynpc 2 8+ bf7) u603jvl75g y+jcfmm9esalent resistances CANNOT be produced using all three resistomqp l9+ gy6xjuv+2 cven0c)mjf 7ys3 8brj7 f5rs?

  02.06: Three resistors of different values can be connected together in diffytyf0 jzi- vb+lx3g) 9erent configurations. If all three resistors are used in a circuit, how many different values of total resist3b -if )ylvt 0zgx+j9yance can be produced?

  97.35: When a single resistor is connected to a batteryf g96nz ,hq7rv, 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 barn 9v,gf 67hqzttery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R+kjbsf6c0idz )w7x b 52, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about t7 x56fbwz +)ibj0sckdhe resistances is correct?

  02.46: A hotplate is dn l0fitrf3;5bexk;arxk12 x1 )c c+wcesigned such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would takec110intar;fxwfcl2 5 c) k;3 xkbrx+e 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 resistor thatu/aq(ag suk;: is dissipating 36 watts of pow uka(g/ au:qs;er?

  01.24: An electric heatjyetehv:4( yfb:w +-8fjdf-4 ya)nwger draws 13 amperes of current when connected to 120 volts. If the price of electr-fyf)y +(fw v- 8hgaj4jwe:d :n 4ybeticity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would isgvrhd,rn( /(; w v7xzk cui5,t cost to keep a 100W lightbulb lit continuously for 1 year at a rate ofc(vx,rs zndh7wr;,5ku (i/vg $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in /pe1i3 piwi,s3w.c dy a power of 24.0 W associated with the bulb. Which one of the following choices best represents the 1pp.3/ysw, iwi cie3d resistance of the lightbulb?

  01.10: Each member of a fa dfbw oia4d631mily 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 fuse, what is the maximum number oo31did wab f64f the computers can be operating at the sametime?

  03.16: A 9-volt battery is b-8,pex.*vfm8 o:bc rjn 4pnkconnected to four resistors to form a simple circuit as shown to the pvj8k4bo n8.*f bnc:-e,xmrp 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 fouphqq/nryn1g /43f 6k u*q w6wjr resistors to form a simple circuit as shown to the6q/nquhn 6/ g4j3fwqy p*k1rw 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, *fiu c szyk3v).62der a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammr y*s2dv)3 kiuef6z.c eter reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery/5ks++gc 5a+tco qt w fyy1qehf 8b/;j, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammetf /c t8tgo++ +5f ycjwsb /;qayqekh15er reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal aaofk b+fa -6h7qr,u ;nl .b/xpmmeter, a switch and three resistors are connected as shown. With the switch o- 7runbp.q;fbl/xa,+ hak of 6pen 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 circui;)s jbzt k-++c tc9u1 wqs:(hfjdp5art shown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, ancs1dztkw)a5ch q-+ 9j; ( b:rfjsu +ptd all three resistors have identical resistance R.

  09.07: The equivalent resistance of the cnvq-tq-n;ck h1u+ v(xf 9+s weircuit shown to the right with resistnt+k-+qs1; hn-(fvxe cq wvu 9ances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shd6ytx9 hels)- s2/fo zows five identical resistors connected in a combination series te)fs-9z2sld/yxh 6o and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical re47xl4 ;-y-ghdk diq xrywt:ys2e 0j 35ip pps8sistors connected in a combination series and parjx-p4 hys t is70dpw5r gy;k:l 4-2xdi8pqe 3yallel 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 identical. Whi 8agrj6l6,j jgch bulb will be the brightesar8 jgj,l6g6 jt?

  02.21: An ideal battery, an ideal ammeter, a switch and three sy8rx9;cqzwpjwa2x7tat: 5h u bj8.)resistors are connected as shown. With t8x hx.u:q y7 );bw5a tacj9pzt8wrj2 she 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 andx:n d,ngrav2hq(lkia * ad1bb+u :62 l three resistors are connected as shown. With the switch open as shown in the diagram the ammete:rb2naldgb1a,*6hdq i n u+:v(xlk 2ar 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 resistors arrlbtld bo; :/97xyf0fe connected as shown. With the switch open as shown in the diagram the a lxf0tb79for;dlb/y :mmeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?