16.09: In the circuit shown, an electric current exists in the metal resisto u5y-byi ( gad*:lrd-vr connected rb -*(dvud-yylgi a5: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 field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_________each bpdo:xou6(9k1 0y k:xayuwe 2resistor is th(x::deyo02pu w kaxkyo u6b19e same.

  06.33: A current through the thi /5bqmjx1dsfj8;czs -8c i1emn filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected; b1smcqm 8fs8xzcij-1 5/e jd to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is thej/pk4e7 naw xoe pgc,22oxu)7 acronym for which one of the following cp uxo72 w ,ee24 xnjcgka/o7)phoices?

  05.16: A cylindrical graphite resistordwy,t+ za85o(sbd/ el has length L and cross-sectional area A. It is to be placed 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 zld +5 /ed (ab,twoys8of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire Iy)qs-m v 0rzap e+.)ldI has twice the diameter and twv.rd )-+) 0y elpqmzsaice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the sayij18 um ,lrdx(a*x k.o 5nqb(e25)vw.m bjtnme material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then dr.((xqe)y mnul ,51j8 ait*j.bkxnwob5 m2vwire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. lma h8u*-2x5 qig8vcourl6r 0+d gd6cThis piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this materia m cg* h-ua+c60 ldgl8ui28or xrd6vq5l because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decidezf4 ym2ei ha/wc)q(q +s to modify the filament. How should the filament of a lightbulb be modaq w/42q+ hcmy( zeif)ified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resi*gkag1t.// ze0x dnv53exf aistors are made of the same material. The length and radius of each reaz /1ad5tf*e k ggv/0iex3 x.nsistor 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 resistancmrtmsjr74). m e R, are connected to a battery in the following way: “Two resistors are connected in series. This combination of t4mm)mrs jrt7.wo 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 circuit diagram has internal resis j1)rcnqn xn2/l) o*ijtance 10.0 kW and the ammeter has internal resistance 25.0 o l)ci oqn jnn2j*r/x1)hm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown tmbio:w )4qh s6,eepq5m h h*j -4fg5mzo the right. The three bulbs 1, 2, and 3 - represmog4je5h:f e w6 bq)h4hpsmzi m,q*5 -ented 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 circuitj 0,8 jefd1ox*h,v gbv at the right. If the current in all three resistors vf0g1jh ,v8 d,xejb*o is equal, which of the following statements must be true?

  99.37: The diagram at rnh)0wo7yk 6 bssb,g. iight represents a simple electric circuit composed of 5 identical l,i)ok bswn 0. yb76hsgight bulbs 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 8+qxk:zgy c4*1 kkta:ymghd : concerning the simple circuit shown where resistors :y 8c*kgz4kyd1q hg:+:km atxR1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is bri)*pqf:4 6x knwoa3t rvghter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with enqfpvkw ra*:t )346 oxach other to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through(j4v:ila/ kvhl 7m vb; the identified resistor in 5 secon/ja7l i vlkb;mv:(h4 vds once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit have the xl,-hd 3 qoeg3same resistance, which would dissipate the greatest po eg, -3oldq3hxwer?

  98.34: In the accompanying c nvm.p ,3pu57+eer7jf 1 qrqtcircuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the j7p1r t ,p+v3cf57enqqmr.eupower supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. Sumd1) weicg6ee:ty.u4ib-t5 rppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and Rie6w ter.5:1 )ydtgecmu -ib 43 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors Rk v)vt4sd9ld f3 7k/mb1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 disldk 9ftvb/d)4mk vs3 7sipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. W0y j664qtxy vqhat is the maximum value of the current under these coy6j 6v0 yq4qxtnditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 12e4(ao(s*nxb1 cje w9t0 voxjco bew4 a1*9(net s(lts?

  03.09: How much current flyt(8 f7injrik0- bhm6ows through a 4 ohm resistor that is dissipating 36 watts of power-jf bk0yih6 (8nit7mr ?

  05.21: A household iron usb-pcc u *su( uu-5tc1f2xlqx(ed to press clothes is marked "120 volt, 600 watt.” In normal use, the current in it isxsc (1fcpq-* cu5tubx (l2 u-u

  01.05: Which of the following resistances could NOT be yk1gu;7uiet8yu5v nu 75 nb a7produced by a circuit containing only three identicau71 yn5t 775e b8iaukngy;vuul 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of. zc c )8gbx k,s-*v0lzoy4g7n*qw psi the following equivalent resistances CA zkqsc4 78 lb.-* gvzix,ng0p*cy)sowNNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected tog;n0jzsmk; ++ g+y l ybyb(8zrwether in different configsmy;k+by+gl8zr (yw z+;0nj burations. If all 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 powoo yo0 q8hy+5der P is dissipated in the circuit. How much total power is dissipated in a circuit if n idenooq0d+ 8y5oyhtical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 andm qhw,orj( 3*h R2, are connected in parallel, the equivalent resistance of the combinjhr* 3oqhwm(,ation is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when opedbpz8*m p8tj*dnb4 .)lm v mb-rating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg of l)*m88 *tjn zppd bbvm.4md-bwater from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current 8gz h6a+x/iw4k3in ssflows through a 4 ohm resistor that is dissipating 36 watts of po nzawhsgsk +38 /4xii6wer?

  01.24: An electric heater draws n(+mjfi / qibv 3lw+4p4zz)hw13 amperes of current when connected to 120 volts)4m/4hz w 3zi+v ib+(jwnpl fq. 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 light ug b) rp,1vq5utfzv7 lxq2,19mom7dv bulb lit continuously fo f l)vxo v2 1gq7,,br51uuvmz7t9dpqmr 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4ml,u*c)zp1;wp9nww s 1jefp w * ca8j:.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lightbul,w1uw * c: 9*1jpa8l jmc)p wnpswz;efb?

  01.10: Each member of a family of six owns a computer rated at 500 watts u3(zd s c;y6fidi 5.qw:tz b.bin a 120 V circuit. If all computers are plugged into a w6bis(;bzd .:dcfiy 3qztu5 . single circuit 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 isjovc9 n07 k+al connected to four resistors to form a simple circuit as shown to the right.jc+k09av7lno
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 simple 7hy7cv: lxnbv th54x sq-3 7zmcircuit aszv4xc bh37s 7qy5:7xnvtl- hm shown 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 resistors are;nww g9+aur1 w connected as shown. With the + awg;runw19 wswitch 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 kg .6 xk4 q5tbdpev22jideal ammeter, a switch and three resistors are connected as shown. Withjbxg.dv 6kt2 2eqk54p 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 resistors are co*gb fg ky2vpp+ .u6o4pnnected as shown. With the switch open as shown in the diag4 .ggb p6y+ upfvok*2pram 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 equ w g0jm)2 7vul/ok;apdivalent resistance? Assume that all wires are ideal, the battery hogw0k7 2 dj ;pv)ml/auas no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right witq,6ze:o-7tok,(p(h pgg avo mh resistangoqp, goha pz7,evm(ko:6-(t ces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors conzi ,l +ru*0ms at 54wv3mxqmv/nected in a combination series and parallel circuit to qlr4/tzxmiw ,uvm*m a0v5s 3+ a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combinad, o 8o ehr-g2zq.)ez* jmf2dvtion series and parallel circuit to a voltage sou2zgohm8 r) *vdjq-z 2, eeodf.rce.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit 5nw.na h)u(/;:gxmo mato9ht4pqy qq mo 1z04diagram, all of the bulbs are identical. Which bulb willtz agqh/9upt ;x qo.a41m0(o4:n)mw5o nhmqy be the brightest?

  02.21: An ideal batt *bigxp1r7 )udl(zc5u f53u ufery, an ideal ammeter, a switch and three resistors are connected as shown. With the switchbupz5rgi c) fl*dxu u7u1f35( 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 mwxcb)9ph (czzdqi)34z*mg), a switch and three resistors are connected asq39ghmmczcixz)4(b * )zd )wp 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, an ideal ammeter, a switch and three resistort1q.p.pujga14nc),b5ts+ g1,mj7biic pl z ss are connected as shown. With the switch open as shown in the diagram the ammeter reads p 1psa.g+pt 1 j).lq,iz,uimg 5tbn 7cc41 bsj2.0 amperes.
When the switch is closed, what would be the current in the circuit?