16.09: In the circuit shown, an electric current - ydt3mbeup69 ho4g*0 ltrst 8exists in the metal resistor connected to the battery. Which one 0pg oh*dtl39r-ub ttmey8 6s4of 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 connecteh.)9lnh, rxh qd in parallel, the_________each resist9hn,q)hlr. hx or is the same.

  06.33: A current through th4dk+y 0j 6yxh2lkv3k ie thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires 4dkvkjly 3 2 +xkhiy06connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED yut6*pc6z n;zis the acronym for which one of the following choices6* c tyuz;nz6p?

  05.16: A cylindrical graphite); t6iahn k,jr t7 .hmaycme88keus 04 resistor 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 ok8ym0 mar h tj)c67;heeui nkta48.,s f the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of t :rdbq+g ngb59rsd 5(jhe same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has 5r dgbr: b(dngsq+95 jresistance

  99.31: Wire Y is made of the same material but has twice the dia :zlln:jgc v kw:vl03+meter and half the length of wire X. If wire X h v:g:lvz+j3:lw kl0n cas a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and9 5b3 o kavv pr7s2gc(b2z,bpd radius r. This piece of material is then drawn so that it is a cyl2vc3 ,p( zo5sarbdb 2vpb7g9kinder 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 brightt u,r)pbxls0xn p 7y1-er light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified i1pxxp7bys 0l-n),t run order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors aeq6x )qf7i oq(re made of the same material. The length and radius of eachq q7f()6q eiox 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 3tswjans h3)o k+gei+.qf .+ka battery in the following way: “Two resistors aw3so .kj+f n).ksg+ +q3hiet 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 :cik9sd()tenwb2 gxw3 0 9x taaccompanying circuit diagram has internal resistance 10.0 kW and g0dt3)x te9 ns9c: x(wb2ikaw the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The thre2ja;g vi b0e-;)2h:a kurcznze bulbs 1, 2, and 3 - repeg akrc:zu;izb0 -an ;jh22v)resented 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 el gja.yleah.o 49+ vae4ectrical circuit at the right. If the current in all three resistors is equal,aja9 ov4geay4l.h +. e which of the following statements must be true?

  99.37: The diagram at righkfwldt:m-s48 8 5+af n6)vznn;jqzlbt represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. n-5 ad 88w6) ln4s vmlbf+ jq;n:tzfzkWhich bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concernin/p9-ut9rh ph-vre .vv ot z4lvc-u76lg the simple circuit shown where resistors R1, R2 and R3 are have equal resistances? rolt--9v 4/zv 7vrl-vcu6epuht 9 ph.

  17.29: Two lightbulbs X andY are connected in series to a3 qle; dckf6k3fw30jf battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If jefk 6;3f lcf33kw0dq 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 thr u6jdo8j t6njc f-.ha3e(p ;afough the identified resistor in 5 seconds oncee jc .a;a6p-jdh o8f6n(t fju3 the circuit was closed?

  00.23: If all of the resistors in the following simple circuit have thefd h)u7cn (6fw:dbw) w same resistance, which would dissipate the greatest power w dc()fbw):6whun 7df?

  98.34: In the accompanying circuit diagram, the curnur zw5d2g 8)n i*z,fprent through the 6.0 Ω resistor is 1.0 A. What is the power supply volta8zgfi wp2z)rn* , u5dnge V?

  97.27: Three resistors R1, R2, and R3 are conni 4luxauv6n.zjb;-5:uf jk7yected in series to a battery. Suppose R1 carries a cuxb:; un f j u.lk6uyzai4v-75jrrent of 2.0 A, R2 has 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 are connected in parallel to pq 7v4 e()k(y7zkkuuw hjy*h ;a battery. Suppose R1 has 2V across it, hu (k7ykh epwjzy); v (k*q74uR2 = 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 maximum e4p99h t3bmfqvalue of the current under t4f99qb mp3he these conditions?

  99.23: What is the resistance of a 60 watt lightbu0:x4de ;uhp wulb designed to operate at 120 voltpwuh4 u0e ;xd:s?

  03.09: How much current flows througt h2m yg 9fetiqaa 2n3u6f2;7nh a 4 ohm resistor that is dissipating 36 watts ofitugytq7;39e2hafa 2n n2fm 6 power?

  05.21: A household iron used to press clothes is marked "120 volw2etsg nzpoc9 o4t8)/t, 600 watt.” In normal use, the current in it iz4e got 298 ct/)sopwns

  01.05: Which of the fogf5 *brmc 4jb4llowing resistances could NOT be produced by a circuit containing only c 4r5g4 fj*mbbthree identical 6Ω resistors?

  94.37: You are given three 1.0 Ω 39sv.p rt6ppqresistors. Which of the following equivalent resistances CANNOT be produc.pv6 qp ptsr93ed using all three resistors?

  02.06: Three resistors of different values can bewrmg4-rb y gs/;ylvnzcsd q-5si-;8 * connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be prv- s5qdy/-ryr-gbzc ;s m n4g 8wi*s;loduced?

  97.35: When a single resistor is connected to a battery, a total powe 8o+bz0tjgs- nr 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 the internal resistance of the battery - j+gb0ots8znis zero.

  96.16: When two resistors, having rec( cfmni9h, ,:lo. ya0dke( cq+5kagasistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements aboute9a,aih0c k(of a kqlcgm.nycd +,5: ( the resistances is correct?

  02.46: A hotplate is dna 83 ob3;lbs05 *kas6vndu tpesigned such 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 d086u3 na3;sbn*5v tsbolkapkg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm rjwj 7.fea+72nb 68upyov )fwvesistor that is dissipating 36 watts owb8fj2nu ey wv6)7+o .7 jafvpf power?

  01.24: An electric heater draws 13 amperes of current when connected r: bmzu rj/2 iiwr*(1ulp, fet51zmr0to 120 volts. If uwri*0z1,p m fjrlezurr5i2 m:/( bt1the 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 lightbulbi*g6r1/; q f nfsixu7e lit continuously for 1 year at a ratei7;ige*fqxsf6 /nu1r of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a po/e8snr*t/vx/v 5 +2gk cqt kkmwer of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lightbulbs/+tqmg/tv2/ 8k r5n* xve kkc?

  01.10: Each member of a familay g;q 3d3r/cwy of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into dag y w/c33rq;a 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 is connected t )e lirwn4)j,ko four resistors to form a simple circuit as shown to tj )4e)k, rlnwihe 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 connec;t kx;f-d:vazur u)4cted to four resistors to form a simple circuit as showr-z:uxt vcafk; d4)u;n 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 aw.y ulka+:z7cnd three resistors are connected as shown. With the switch open as shown in the diag+ kuz: w.ly7acram 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 ammetl-:q( c6gj 9xlohhbbo5 j7/k cer, a switch and three resistors are connected as shown. With the switcl67jb:j gobq lc5(oxh/ hc9- kh 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 ammetb:bq,us o 26uaer, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0usubo: 6b,a2q amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the ri44cli.ddvmxk 6/ pm1nght, what is the equivalent resistance? Assume that all wires a6mv44ln k id/dmcxp1.re ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit ssm 99ej2ruh4;)f,1rc fo mf mdhown to the right with resistance9fu);2h 9f ,dror1j4 cfemmmss $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical re7j 5viqo,fr m3sistors connected in a combination series and parallel circuit to 5 oi,3qj7mrvf a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected ippj ,hz4tr 7s:aa*w/sn a combination series and parallel circuit 7z /astasw ph*:pjr,4 to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, w8k8cyd0p)nrdn ev i3 h+z+ok7gu .c6 all of the bulbs are identical. Which bulb will be the brightest+ewzuy id 8c87cpr6 vkk+0d)h go3nn.?

  02.21: An ideal battery, an ideaz5 izql;h)0 bal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the;)0az l5hbzi q 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 restoghupheovi:5nw.mqmw * /h (:(91 a yistors are connected as shown. qhtw(p9/agehv5m:whyo*uoi.n: m( 1 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 resistors are 8 0x l:sgqt/ 4gvughati.0,qm connected as shown. With the switch open as shown in the diagram the ammeter reads0ig80m :q uvq4,stl/hg.tagx 2.0 amperes.
When the switch is closed, what would be the current in the circuit?