16.09: In the circuit shown, an electric current exists in th on33;80a7uladeck tr9j qu(he 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 field through the inte9 ruq ane a(chtd08 jkl;7u3o3rior of the resistor?

  98.06: When any four resistors are connected in parallel, the_________en)jpzz viw:m 9 i))op3ach resistor is the same:mzzpi)vo93i j )w )np.

  06.33: A current through the thin filament wire of a lightbulb causes the filama.7cwh dl9*g et;oes4 ent to become white hot, while the larger wires connected to the lightbulb remain muche wglt4.*h 9s7;dao ec cooler. This happens because

  13.08: Some standard household lights are being repbi(,xen k ()mqlaced with LEDs. LED is the acronym for which onem(q x(k)nei, b of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional ark.2 ljt2zfa;vea A. It is to aztlfk 22v ;j.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 of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire IIs c)g .aes+aukvb7r:gz2+w /y has twice the diameter and twice the length of I. If I has resistance R, II has raw v)c :r7gy. /ksauez+ g+2sbesistance

  99.31: Wire Y is made of the same material but h1j16x ,jdbyujas twice the diameter and half the length of wire X. Ifbx, j uyd1j61j wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of materie 22i4 mu9 foiyyv+1yswq*c a(cg8l+mx ac32i al is then drawn so that it is a cylinder with new length 2L. W9asgux+( iq 22w +cy o8ycle*fm14 av3yimi2 chat happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light jp:2qvjqspbj8 d/+v xwkt4.( bulb. He decides to modify tqp8/j.jbx d4jt:vpq( ws2v+k he filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of ths oy/d+2:2 cgmdnd.ly e same material. The length and rac2s m.l2nd/d:yy+gd odius of each 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 a battery inbg fby: 43av0a 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 of this arr4fab:0 gv 3yabangement of four resistors?

  95.35: The voltmeter in the accompanying cirkoe*,(0bplonl ;9 6a xdpmwo7cuit 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 most ;*oxnkalb9op wld06, ( om 7epnearly:

  97.37: Consider the compound circuit shown to ts0 kwds8h 9+gihe right. The three bulbs 1, 2, an09i8 hsdkg s+wd 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 circuit at the right. If ts7a-dj luz(u7 he current in all three resistors is equal, which of the following statements zd7ulj7-sau (must be true?

  99.37: The diagram at right represents a simple electric circui sior 1*8nox5it composed of 5 identical light bulbs and 2 flashlight cells. Wsx5o*1iorni 8hich bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concoccn1a 6u u(93g5qlulerning the simple circuit shown where resistors R1, R2 and R3 are have u6 (5u3l9 1 uqaolgnccequal resistances?

  17.29: Two lightbulbs X andY are connected in series to a for q4i*3krhr6 vm/2zbattery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY ar qr 3krvr/o4*h6 mif2ze 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(6gcn pml(4ol will pass through the identified resistor in 5 seconds once the circuit was closed? glocnlm46( (p

  00.23: If all of the resistors in the following simple circuisk ac8xeakj c6 -z+ b6+4z46ugd f.ukkqvg i.4t have the same resistance, which would diss6k+b. v.4u6u64k gdcfg4ka8qac + i ex-zsjzk ipate the greatest power?

  98.34: In the accompanying circuit diagram, the current throup6uh j 8xqb-rht5wf32 gh the 6.0 Ω resistor is 1.0 A. What is the power supply voltauw jx62h 5hfqpbtr-83 ge V?

  97.27: Three resistors R1, R2, and R3 are conn3zd6d+zct b1nected 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 d6z t1bdz3c n+across R3?

  99.40: Three different resistors R1, na(n:0aj3 3g52slh .iq b5apr:nlrrz R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across i nnlh ap3jn.:lrq5: r(52ag0sa r3bizt, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is ratedv7r;rl ,a fc7drux3k 8omb3 p, 1200 watts and 120 volts. What is the maximum value of the current under t,v8u cfdpxolr; 7a,33rm7r k bhese conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 120- mg*qmu,dd95.gu gb; wn+ki o vi+dw q;m.u9 k nogmgd ,-5bgu*olts?

  03.09: How much current flows through a 4 ohz6lwdu* 4wdl+ m resistor that is dissipating 36 watts of pou l*wz+dw4l6 dwer?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.bhjje9 ,kq2 g9” In9 j 2gbqjek,9h normal use, the current in it is

  01.05: Which of the following resistances could NOT b,wo +;2ftn :acrc8xsf e produced by a circuit containing only three identical 6Ω re soc;:rxtc8aff,2 n +wsistors?

  94.37: You are given t9ag6(s.lz3r p h,jt)k2 hqsr khree 1.0 Ω resistors. Which of the following equivalent resistances CANNr.khhstkr(pqz 6l) 23 9a, gsjOT be produced using all three resistors?

  02.06: Three resistors of difflpdkyi:6 y fp 9:k2i6hs:j9lzerent values can be connected together in different configurations. If all three resistors are used in a circuit, how many differ ipz:ijl9 d hy:2lkfkp:s966yent values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a total power P is dfh i284qb;xr dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in seq4 rid xf;28bhries using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1u * h3wb;dp-qt-6e4n-keqeiev s4g4 s and R2, are connected in parallel, the equivalent resiw 6qv;te-g4 p4h-i-eks4uee s3 q*bnd stance of the combination 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 p :f8d(y g/qm(ag*;bxjno 7zz12Ω when operatin y:qxa*8z(db m(z gopj/ gnf7;g at 120 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 f ./9hoiphn6 2um iag81 k9djlulows through a 4 ohm resistor that is dissipating 36 watts of p9u mka6 i ig.jhdu/hl2 on81p9ower?

  01.24: An electric heater draws 13 amperes of current when connected tvhr1l ty3:v(ko 120 volts 3y k:vl(rt1vh. 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 lightbulb li8fni yv8 *k kiaxr3+)et continuously8 ek+)rii8xk*fvn3 y a for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power of n m9cnn41g/pai g )v u4*axe3h24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lightbul*n9/an)c i a4 gxmp4ng 1uhv3eb?

  01.10: Each member of a family of si.h8ez;:oasw )d jb qm9gr+9 v0krg:lrx 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 maximuh:8a: g) .zem9lj;+ b9dwgos0rq krv rm number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to fou ;/7nazbvsko lh. zp. rcyk 2sgpoy(g1;5b1z:r resistors to form a simple circuit as shown to tk o;.75 :b;y 1 (os2vnys plhrca1/kzgzb.pg zhe 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 62dd6 g-i tosd2/e1ioo)jc fhfour resistors to form a simple circuit as shown to the righe26i)t 2hd dgcf 1dsj6o/-oiot.
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 ar9+3utx hvqhf+t 9ao.ve connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0ut9tah+vfq 9vx o.+3h 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)+(tbqe2y3 jb3ck, snk )6azjgq b6nd resistors are connected as shown. With the switch open as cn g s3qbjq6zkbj)atb(2 ,3+ 6y) ednkshown 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 dm5s*xn8t x;;( mx mqxideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter readsxqm 8xt x;m;*sn 5m(dx 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 equivalent resistance? ,gui;uw: ho2g Assume that all wires are ideal, the bwg:gi uo ;2h,uattery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with resu 9etbx8 s73 g m:+f7:chhexaaista7afg97h: eu3m: s 8hct+ xbexances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combinat zz2 *mu5y+cxqion series and +xuyc2mz z*5qparallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connectq pu 08l,n+dx+ijudu-ed in a combination series and parallelj-+lndq,uu8uix+ d0p 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. lkji7p3lzh 8:Which bulb will be the bklj p3:zl h78irightest?

  02.21: An ideal batter, 46mi5xr0t ct0w/xyuy5flqfy, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as fxlt yf/5 wc00y6m4q,ui 5xtrshown 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 a 0hatz --gbg(0p r:f25xchhrrnd three resistors are connected as shown. With the switch oc5 h:aghrt0 -x rf0przhb -(g2pen 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 resisto;kwz+rj v 5(yzd3/obc 6fy8jprs are connected as shown. With the switch open as shown in the diagram the am5jycv3+p8 6wr( jofk;y/zbdz meter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?