16.09: In the circuit shown, an electric currv yui)4/(v 8g(ga/db)mtp im5p1 t-tkef7ajr ent exists in the metal resistor connectedmjby41)apdg -vvk(7mtre/i tiu8/ a)pg t(5 f 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 resi-,zxdjzpu7: zt/04xjvxwq e4 stors are connected in parallel, the_________each resist x4xz4:q0- jxw 7/pz zdvet,juor is the same.

  06.33: A current thrra9d*f*ly; 9qckmh vdib67.cough the thin filament wire of a lightbulb causes the filament to l *ib.c9rkdfh myd7qavc* ;96 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 rx(:op,i*tps seplaced with LEDs. LED is the acronym for which one of the follo:s,soi x *pt(pwing choices?

  05.16: A cylindrical graphite resistor has length L and crossy bpt8)u xc8-d-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 resistivitb ut-8 c8d)pyxy of the cylindrical resistor?

  98.20: Wire I and wire II aml4q6mr8-6b z8v he;p d2: sv70p:ltn wl mlaare made of the same material. Wire II has twice the diameter and twice the length of I. If I has resisbsmm 6 m2awd:6z 8hlav;-p v8llq 0r ten:47pltance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diametey40w0v +dpfr w0ovz2u r and half the length of wire X. If wire X hasu0+w 0vw v0z2po 4fydr a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piec-wkkl) qlc5po vqkyg;80wd -7e of material is then drawn so that it is a cylinder with new length 2L. What happkwp 5-8kq w0yl;- vl7qcg )dokens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. Hehe7bx (h 0azj2 decides to modify the filament. How should the 0jhh7e zax(b2 filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors ogns/9 q,akh. nbq,()pjin9 vare made of the same material. The length and radius of each resistor in. ) 9knsi(qq,pan,gv9bjo /hs:
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 connecvi+27zk6briz-a )e-c we5hv sted to a battery in the following 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 ofbe7ashz virvi )2 6ke-cw5+-z this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuvj)qs mx-+dj 7v1i,nds1r8*b tijj1j it diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is mos j+q*n,vd1x-1)jdit ijb m1rj sjv87st nearly:

  97.37: Consider the compound circuit showj j, -ok(iit2 dewk*6qn to the right. The three bulbs 1, 2, ankj -kjw(i,2tedqi *o6 d 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 electricaefd;:cjplo lko/m 4fh;p 8*,hl circuit at the right. If the current in all three resi8*mj d,fe4h klh;l:foop /;c pstors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composem aujaeezko 4o,;* r4yvx9z+;d of 5 identical light bulbs and 2 flashlight cells. Which bulb (or 4u9k4e+zxv ayomoz,r ea *;;jbulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true conv8av/7djgisg( * r/ ivcerning the simple circuit shown where resistors R1, R2 and R3 are have equal resistan rg i7vs8i(a*jd/ g/vvces?

  17.29: Two lightbulbs X andY are connected in series to a bat 82n e69i+nqfmd7 2fokpu br,w f+mws5tery. 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 following choices be75,qoims 2 fn2b6mpe+ f9+nfkwdr8u wst represents what is observed?

  06.34: How many coulombs will pass throughw-sgfgl.c44wmqf5 ;pi )s;nw the identified resistor in 5 seconds once ths4i;4ms5 f)qcnww pflgg;w- . e circuit was closed?

  00.23: If all of the resistors p7fba3r6 -mm 3av( agh in the following simple circuit have the same resistance, which woulda - hg3b37vmpr6(mfaa dissipate the greatest power?

  98.34: In the accompanying circuit diagram, sm+h -dxolbp 4e3p09p the current through the 6.0 Ω resistor is +0 el- 3 mdopx9bp4psh 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 ae 0cmyic tv;op01fc78 j0xsm5re 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 across Re8 5 tvc0f mxsic7 m0yc1j;p0o3?

  99.40: Three different resistors R1, R2 andR3 are conne- .dqd hazzc2 on3:oha;iz02ected in parallel to a battery. Suppose R1 has 2V acro2a:c qh .zeo0ah z-dnz3o2 i;dss 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. Whviv: vt6kay1 /at is the maximum value of the current under these condi /6iv vy1at:kvtions?

  99.23: What is the resistance of8xtl)cglt 8u1b *grs3 w;x*ba a 60 watt lightbulb designed to operate at 120 votrl*tag*c8 )b w;3gxx1lus b8lts?

  03.09: How much current flows through a 4 ohm resistor thabt)(yll uep br f0m83/vb:tf5t is dissipating 36 wattl pubf0t :3)m5l(8vebt/byrfs of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.” In(/ 5dw trygoq-b3 g8aj ,s7g yccm5of5 normal use, the cm8d fg- 7gg ,w a5yjy5qb3rstoo(5 c/current in it is

  01.05: Which of the fwjyj(05pp1+ )ws mr a6aqi6s xollowing resistances could NOT be produced by a circuit containing only three idenwsp (iy 61js6 w+mxapj 5)a0rqtical 6Ω resistors?

  94.37: You are given three 1.-tz u6m5 d:vethuu*1a 0 Ω resistors. Which of the following equivalent resistances udte :651vta zumu *h-CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together n1gj/hx2by f46h0rmr in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be produc02gmbxhn/ jhr f64y r1ed?

  97.35: When a single resiqglv*qcalm : 11scl6(6t5 iqw stor 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 same battery? Assume tlcis 165 aqlwcqv :*t l(qgm61he internal resistance of the battery is zero.

  96.16: When two resistors, havlmo0 / jbpynxd t0(0-ging resistance R1 and R2, are connected in parallel, the equivalenypn bg/0-0omld(tx j0t resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed sucx4bvy-;nze7zoxfi5u: ,5mtp bk*8s)o+ ukgo h that it has a resistance of 12Ω when operating at 12v5;mxn zftpb+ i x z,bu8goy4- uk:s7 o5ko)*e0 volts. What is the minimum amount of time that it would take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows throv 7y.4f) bz,lih 74uug fn v/,bh5dpzcugh a 4 ohm resistor that is dissipating 36 watts 77z4ncfg/z h,p i)bvfvb54u u ,yldh. of power?

  01.24: An electric heater draws 13 amperes of current when connected 1;f-g,n fpxiv to 120 volts. If the price of,xpfg1nvf;- i electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how muchtqo se+ j6uc, j8wv.4 tbl7b5j would it cost to keep a 100W lightbulb lit continuously for 1 lb8 sj,.cju4ovq7w t6je t+b5year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A throuy 7;pygs-t1zh n* a:vbgh a lightbulb results in a power of 24.0 W associatp7t:gsyva- zy*n 1; hbed with the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family o;w1j1nwth3tej 4l ;jpf 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 numbe;wjn1th1jtpj; le w4 3r of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected 8nz .eh ndnj9h0n4e6bu/* amu to four resistors to form a simple circuit as shown to thb90.ahe*z4nnmd/j 86u heunn e 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 hma,) b) xzyr:four resistors to form a simple circuit as shown to the right. zhx) ,y)mbra :
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 coc ba1s- ef k1hg2k-h1onnected as shown2fbkk - 1gs1ho e-ahc1. 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 and3i3axq1sg d 0g three resistors are connected as shown. With the switch open as shown in the diagram the ixqgg 31d3sa0 ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an+pha m5ez ce /2f8mn,s ideal ammeter, a switch and three resistors are connected as shown25sn ea efh m,c/+pmz8. 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 rj:m l71kfz c c68nkay6ight, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have iden66j mc8fk71c:zynlkatical resistance R.

  09.07: The equivalenndpxx( /+ w9uuj(ekucq6-k t8t resistance of the circuit shown to the right with resistances jcueuk x/6q-td(w8k+n p xu9($R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a co j)ncam.* ygo3mbination series and parg*a .c)oy3nm jallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below sho,(jy rnkz4mfgn/.ys3ws five identical resistors connected in a combination series and parallel circuit to a v/ 4k ,rm(3jgzf ynyns.oltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Which bulwrx:v adc)g* :)mt 8ic 8ock+pb will be the brightekxr wc8g)8 v+tmc)i *:opd:ac st?

  02.21: An ideal battery, an ideal,ka,.k9pdq:-mc ucvt j :kqf 8 ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the 9,um8tk jqkd aq:.:k-vc pf c,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 resistors ares;dk 71ab7 6b0mp aw -,cyrjxs connected as shown. With the switch open as shown in the diabcsa;ar b y-61w ,jx sm0p7kd7gram 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 z5 z wx++226lqbi kg5fsuats (are connected as shown. With the swikbax2s+q+2z sf6 wgiz55t lu(tch 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?