16.09: In the circuit shown, an electric current exibzp/ 0tvicg; ;sts in the metal resistor conv ibt;zp0c/; gnected 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 3xkt4d0/ mf6rg nenk3. jyv 4jresistor ftmxk6v.0yd3 j43enr 4n /gkj is the same.

  06.33: A current through the thin filament wia6(w1lhd,x m gil (+.xuo*hxj re of a lightbulb causes the filament to become white hot, while the larger wires connmo (dlilh au,w. x+(xh1x6g*jected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are berhr- nrk v 8 ;:4j5kg5madt5qding replaced with LEDs. LED is the acronym for which one of the following chr45rkh vd58;- dm tk5rn:j qagoices?

  05.16: A cylindrical graphite resistor has lengtujp qomh-s7 oi76i;1ha d, a;eh L and cross-sectional area A. It is to be placed intopj ohiia;oa,6s;1mq7 duh-7e 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 II has twice the d99qpk;ibbmw :iameter and twice the length of I. If I ha9wqp 9mi:kbb ;s resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter a0 tkdj4* q+;*c c:elsc8y vjyxnd half the length of wire0ly4 +k*sy ;jdt*vcq c jxc:e8 X. If 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 py e3;tvw.*nik iece of material is then drawn so that it is a cylinder with new vwnk.i t;3ey*length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants trpb8mq6ly6)hhf ef-4o1 u tl(o make a brighter light bulb. He decides to modify the filament. How sho)fuf6( h1lhqp6lbt 4e8mo -ryuld 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 ac0d 9l;rq 0cdrre made of the same material. The length and radius of c;q9 0cd ldrr0each 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 connectedk5v7cvhb 4/o2ik y6s f 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 f s kvf/62io574bhvkycourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying c+tvz c (.xi2cwircuit 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 nea vtixcczw +(.2rly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 1, med5qld8ny1n5s x 0 *t2, and 3 - represented as resistmdt0le5qy5d x1 n* 8snors 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 righ,cq1na:i ulwpk b(3s9)waz-d t. If the current in all three ren3u wkw lb()s:qz1-a cdip,a9 sistors is equal, which of the following statements must be true?

  99.37: The diagram axvir) jj )kt2tteu,y7*r h vv,g bc5/6t right represents a simple electric circuit composed of 5 identical light b25b, te6utri7 kc vgtv) hrj*x y/v)j,ulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT trux1 s btna ;jvbu768;hbq;zq o:e concerning the simple circuit shown where resistors R1, R2 and R3 are hav;87 h tojqu s;a16bbbqzn:v; xe equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is bri1v+y585kqu soi-r djg ghter 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 best repr yd+rq8 5u5-jvksgi1o esents what is observed?

  06.34: How many coulombs will pass through the n7g03m1kokdo4i o 0ej,xyq3y identified resistor in 5 seconds once the circu,m 0oy gjeq43iodx k1 k0n7oy3it was closed?

  00.23: If all of the resistors in the follya 0;ue6p /ke.nb*lfad/wk en:: gp7 oowing simple circuit have the same resistance, which would dissipatdnu:yw*0f;knae6.l apb /pee /:gko7 e the greatest power?

  98.34: In the accompanying circuit diagram, the current through the /lh/ad:cly-h 6.0 Ω resistor is 1.0 :/ /cdhhla-l yA. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a b eq wce; lv:qd.;(6l,j49bu dlk2t qoeattery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ωlw :qjve( t;.kd6 eeqc49o,b dlul2q ;, 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 parall4cj:zh 9zpw4aq wt 6 x2qd1e(fel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is tqpaqfjx9 zd2: whzew644c (1the current in R3?

  99.13: A heating coil isb5r v12y oj.m59lpuwk rated 1200 watts and 120 volts. What is the maximum value of the current under these conw koj5 vb urlp.y1m952ditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate a fhr 8hq+yh.m2wnf3i;t 120 voltyqhf+m 2rf8hiw3 .n;hs?

  03.09: How much current flows through a 4 ohm 9mglrar ; t+nc.u6ae )resistor that is dissipating 36 watts of powea;.)mlg6utnar+9 ec rr?

  05.21: A household iron used ecpjr 0 60xs -13abkfoto press clothes is marked "120 volt, 600 watt.” In normal use, the current in itapk0x01fb oc -3r esj6 is

  01.05: Which of the following resistances could NOT be produced bc2qdf wa;0 0nzy a circuit containing onq0z ;c 0d2afnwly three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalentrk-+2o j)mi2 oda 6rtr resistances CANNOT2arktoo j+ r2 6rmi)-d be produced using all three resistors?

  02.06: Three resistors of different values can be connected tob; 8tolf7 vzj4cm -p4agether in different configurations. If all three ;jlb zatvf48-cp47 mo resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is conoizh lb h1v0/z728 i+car )ftjnected to a battery, a total power P is dissipated in the circuit. How much total power is diss h)i0zr tlb2cai 1+j/78zfo hvipated 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 resistanc4wkltnwbth+;q 28dv(im/5b- ;o 3 fuurg;rfg e R1 and R2, are connected in parallel, the equivalent resistance of the combinatf dt 4ukrt-8v;;l;2 +r bif53 owgbunwhmq g(/ion 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 12Ωqx 89aa g:x7cj when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg of water from :7jaxcqx 8a9 g$15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resqhxk,y.3 xtk0istor that is dissipating 36 wa3h xq kk0,txy.tts of power?

  01.24: An electric heater draws 13 amp,x8qyw lla0(kp0ufwn k1qa/0 eres of current when connected to 120 volts. If the priqw xqfna (lk0a,kw01uy0 8/plce 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 im/*oh(*/ekgh;1 fwb ni a3 c++kqmt gkt cost to keep a 100W lightbulb lit continuously for +k/ (atb+hmk;ch/ wnogg*1q e*fi3km 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results *j;sqvn5tn/ jhv8pn;a d 8xhqko93l/ in a power of 24.0 W associated with the bulb. Which one of t hk ntv9x3nqnlo ;j*; q/ph/5ds8 avj8he following choices best represents the resistance of the lightbulb?

  01.10: Each member of a famlrts9f dl8 5g7ily of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a sing9rl8 slg5dt 7fle 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 to four resistorsh7sce rhqw s9bje: ,ky +74ks8+c6qda to form a simple circuit as show, 7b+shd 86rhcq:qycas 9 kjkesw7e+4n to the 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 four resixp s2yqm;3b-hstors to form a simple circuit as sho3qy2px-m;shb wn 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,97n b6u;vto h,nsm6fp a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter re ;7 6btpnhnsm6,v ouf9ads 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 swy6c 3b*dt o7vy2 d(ylxitch and three resistors are connected as shown. With the switch open as shown in the diagram the aytdvy6 7d 2bc(3l*oyx mmeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal :ne -j;jkrt/ d i 5rt0tyw/n3- os2ekpammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperenwd ;/e:rikptn0j jk/3-otsey- r t52s.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuitqbr:abj+ 3ktz z2njf5;3 6klsip i)j9 shown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance,t i3 sj;j2+9q:f)z3r j6 kk5nlpzibba and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right w e(38c*fa.o 8nymirfy2u w)d gith resistn2er mwfc8yodui3.a g*y) 8f(ances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below*kxa-4x. t zxg shows five identical resistors connected in a combination series and parallel cir-z a*xk4tgxx.cuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram bo-o7 5 y5sch-tgzg9wtelow shows five identical resistors connected in a combination series and parallel circuit to a voltage source.tgcg9w t5hs y- -57ozo
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit (zyd(rxd4kff 1)*e 9iypo (zbdiagram, all of the bulbs are identical. Which bulb will be the 9)r1y x(*z (d4k i fzdboepy(fbrightest?

  02.21: An ideal battery, an ideal ammeter, m hb--(kgwcqnywz v1tr 9*5;pa switch and three resistors are connected as shown. With the switch open as shown in vg9 (;5bn-wpczr 1qw*mkh y-tthe 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 are conn)t1bay-vc fk+bpq ;.yected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampyb+fakp. 1 )yv; -tcbqeres.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an i, qfq21.wrmfk 9jp,om deal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads2jf1p,mmrfqq .o ,wk 9 2.0 amperes.
When the switch is closed, what would be the current in the circuit?