16.09: In the circuit shown, an electric currikzdm:4 ofn*q b2 hdyru8v/vb7;5 oq2ent exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron fl8qo k d;/ndz2uh7vrbi b m fqv4*o5:2yow 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 par+(ay ,ljk ey1xallel, the_________each resistor is(ykye1+a lx, j the same.

  06.33: A current through the th o-c+vf99y u y8cb4gmpah ux**in filament wire of a lightbulb causes the filament tuy9f9 gmxbcy * cp+-auh4vo* 8o become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs-cdi q7p.xi 5/c zhs9o. LED is the acronym for which one of the following s/9cd qpi-7z5x i .ochchoices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area7.5gi acsx-4h 4bfpfe A. It is to be placed into a circuit, but it first must be cut in hhfb 7 c-e.4xfg5sia4palf 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 th5hy8.h)(dd 10lbfpc1prb+t.z n fqb qe diameter and twice the length of I. If I has resistance R, II) 05 drbbn(ylppfhdcb.hqq1 f8.+ 1zt has resistance

  99.31: Wire Y is made of the same material but has twice the diamet74 gow9.uo 8mi;m vi9fms ene9er and half the length of wire X. If wire X has uimnm9.9 7mewie9 of4og s8v ;a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor ha/ k/icowal9m fp9.ugj+g no,3s length L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material becaus/3c,kgm9a9ojnop+ l g/wufi.e of this process?

  07.27: A junior Thomas Edison wants to mak/u(qa m(:hfc ve a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more:f(v( qua cm/h light at a given voltage?

  16.07: Three cylindrical resistors are made o;xmo3m3y gjnpo dn.y5+xy( t) f the same material. The length and radius of eac5 ).n+dtxyo(3ox m;j3y mgypnh 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 rak r0a2jrpq*8 esistance R, are connected to a battery in the followinjkq8ar*2 r p0ag 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 accompanying circuit diagram has internal resista7mevhayj w; 73nce 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 3 h7me7wva;y j1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound muy/b(jo8ids nn /b- -circuit shown to the right. The three bulbs 1, 2, and 3 - represented as resistors in the obb dmnj8-y(- / siun/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 right. If the current in jr ab5ktt0)d2 sr:c )rall three resistors is equal, which of the following statement r a )5rdtrb)js:t20kcs must be true?

  99.37: The diagram at right represents a simple e5)i2c xue0ow1pl1b k flectric circuit composed of 5 identical light bulbs and 2 flashlight cells. f0w) 21opi5k1exclb uWhich bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statemen5b hfwk 7a2ir 8p a2.y(v0ska7p6 dmdhts is NOT true concerning the simple circuit(7hid80fa wk2mdrh7. kaavsb 2p56yp shown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bul7j m)ynp6 ym;:e;j5-nzpkwaw b X is brighter than bulb Y. Assume all circuit elements are wnyem pw5:;-a j;n6zp)mk7j yideal. 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 will pass through the ident(opicv,f5*aewi e dt+;g 2.c7ev2h rdified resistor in 5 seconds once the circuit was cl*;f,g7idte r(owvahc 5v c 2pe2.d i+eosed?

  00.23: If all of the resistors in the following simple cixph+qlvps:k4gz * 58p l. x*twrcuit have the same resistance, which wou*:h.qk4lp8p* xpxt5wlg + v zsld dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the c8f :h6dr tit)ctfi7/zurrent through the 6.0 Ω resistor is 1.0 A. What is the power supply volta/t7: ic8f fdrh)t 6iztge V?

  97.27: Three resistorx/d/ vmfwat l761(nct s R1, 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 voltage 7lnc atw1m v/d 6/(tfxacross R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to a b6os wczk a7jc9jvd)17*) lv jnattery. Suppose R1 has 2Vva6 w1j)z77l9* nvd)o skcj cj across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is iheh e0/rm ca- 8ywdt/ +7sscvtv3/t(f.cc u,rated 1200 watts and 120 volts. What is the maximum value of the current under these conditionf cvr(/u cdtsc73 m.ycvh-// asih ,t+ew80te s?

  99.23: What is the resistance of a 60 watt lightbulb d qwf.:u/lj* qfz- ce1hesigned to operate at 120 volt1/ff-h*ql.zqc: eu jws?

  03.09: How much current flows through a 4 ohm resistor that is dissipating eq. b-ases)mq zj.9 7j36 watts of s)9.s.qjqjb7eez m a-power?

  05.21: A household iuway7,io-fy,0et0 s lu0c 6 2-yhddfwron used to press clothes is marked "120 volt, 600 watt.” In normal use, the current in it d26y,fu u,ty -shiy- laf0 oc0ed0w7wis

  01.05: Which of the following resistances could NOT be producem/4ap n9 yrp: v*h-hnceh:b 5ed by a circuit containing only tr/:a 5-4c e hn9*ynhp :hpvmebhree identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of yw1ks.2fah*lthe following equivalent resistances CANNOT be produ*kfl2a1. wy shced using all three resistors?

  02.06: Three resistors of different values can be. ef1y:ulq)z z connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistlyufe).1z: q zance can be produced?

  97.35: When a single resistor is connected to a battery, a total powdhs oz t1:+2ywer P is dissipated in the circuito:t+h1s w2zdy. How much total power 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 resistors, having resis v joash55:sj g:51y ej-x2hbstance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω .yja5:-1ossv sjhgje5: xb2 5h Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed suetge 0opt5d :l9 zqgwf3(xt/ 5ch 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 watep g3 (tto5dt /wgf 5e0zqlx9:er from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm res o/ g 07nvuo60(bc0knge zywi(istor that is dissipating 36 watts nv70g0ocie/y(zbo0uwg6n (kof power?

  01.24: An electric heater draws 13 amperes of current when connected tbpzycu7 3+- eeo 120 volts. If the price ofpece +- zu3b7y electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much wo0wkovvj4 zcx,e t8( gpkarq sb5x-)1 1uld it cost to keep a 100W lightbulb lit continuously for 1tkekrx5-q0ba8 4po,1zcgw(v1 jsx)v year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a poe(e4db ey/ /njmcnz:uwf 3k f,99kgm7wer of 24.0 W as3n fg/ dufk(9ey/wm,ekbm: zjc4e7 n9sociated with the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated 4v+wd54 mi tb6amn d3uat 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 of the computers can be operating at345n6 w v+b dmtmia4du the sametime?

  03.16: A 9-volt battery is connected to fo( /a)lk1th rrau 92+(zc ojrtpur resistors to form a simple circuit as shown to the righoktp+ ((lra92j/ahrt1u c)r zt.
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 for3 tl,uoo2 nj zos59.k1.fctbtm a simple circuit as shown tk bo,otc 52. nt3fu.1z9 ljstoo 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 i b68 )tbfpvq+adeal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the a 6fbtb+q p)a8vmmeter 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 resist z1je0py-uc- gors are connected as shown. With the switch open as shown in the diagram the ammeter r--0u ze1gycpjeads 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 r6b+o :6fxxpn cesistors are connecte6no:x c6fb xp+d as 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 equ+fnjk1) 8 ioecivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identicalj 18nkoecf )i+ resistance R.

  09.07: The equivalent resistance of the circuit sho dc/0ln5 h/wvewn to the right with resistanclnh0/d/ v5 ewces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical p - hu316itmo3iv) wkphzb,* jresistors connected in a combination6ht1*z)- mhbijip3 u,v 3wpko series 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 resistors connected in 8ji *3 s b(7s5lvcf;i7zo4 axrd6wfena combination series and parallel circuit 45bisv8n73e(a6zsjcf * ix;fow7dlr to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, fho .hv5ez)0ho4oi605 nw7igfs ,urm-im(c z all of the bulbs are identical. Which bulbe n h7ohsim .ozc fv-o0z 5ugw0(,i6)4 hmirf5 will be the brightest?

  02.21: An ideal batt5ut wc0,fj2c rery, an ideal ammeter, a switch and three resistors are connected as shown. With the switch opejrc ,20tc 5fwun 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 swc5xw98/ ejp5un+hg ztitch and three resistors are connected as shown. With the switch open as shown p 9ute5c+nz5 w/jgxh8in 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 zj )d18tv) w2:ma/rbvo w nc-kare connected as shown. With the switch open as shown in thmvtr: bv/2)d wkjo z81aw)-cn e diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?