16.09: In the circuit shown, an electric current exists in the metal res7 3fb2w28infpgw,p mzistor 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 interiori7w,fp fb mnwg322zp8 of the resistor?

  98.06: When any four resistors are connected in parallel, the_________eacqa .c8m2h p94f;p8 mlq:qr sbbh resistor is the sam2qb prclq988h;m a: 4smf qpb.e.

  06.33: A current through the cloa9 -cc(yty3x -n7fthin filament wire of a lightbulb causes the filament to become white hot, while the larger wires cyfacn t9x 3c(l7- yoc-onnected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are bein bar:w fd*7ok:-q0m lug replaced with LEDs. LED is the acronym for which one of the following 07udf:qal * wr:bmko-choices?

  05.16: A cylindrical b;fafcpov -s) j/jackt-70 h+ graphite 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 ntsf -+v;ac/jf- japb)k 0h7coew 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 qe5r9 w98yslg lun):epm/h5 6uiulw / the same material. Wire II has twice the diameter and ep 5hns 6w)uyw :q895uel l/u/imrl9 gtwice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the sa3,ds3)h og6(zz hr3 ji wfkjo8me material but has twice the diameter and half the length of wire X. If wire X has a res36idfg rkoj,( h z38ojw)3h szistance of R then wire Y would have a resistance of

  03.23: A cylindrical xygywl1v *y,,resistor has 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 resistan,, *yy ylgvxw1ce of this material because of this process?

  07.27: A junior Thomaswlx90r okm oi *d1iry34h,fg66iig h + Edison wants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order xi ir6m9g, lrof3hd61i0o khiy+wg*4 to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the samerhcyflnscn2 / x4* r. /zq /jy2tu-ws, material. The length and radius of eachcwqzh r2y* x/ jl /n-s,nuy42f.ct/s r 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 bat3pasn 4mv bi3*tery 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 e *bs4nv 3a3pmiquivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internal r jbd f9sblb w6+(g(d+xesistance 10.0 kW and the ammeter has internal reg+l(d6(x+s jwbbfd9b sistance 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 tng : 7)7eo,e/hoyxslvhb) b65gcyz*q hree bulbs 1, 2, and 3 - repen 5o)qzg*/y)ob b7vle csx, 6h :gy7hresented 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 the currenkfty7 5 a 1;5-dlwuauot in all three resistors is equal, which of the following7uk -t; lyao a1wud55f statements must be true?

  99.37: The diagram at right represents a simple elmabn*ixl; ds1 ,vy73fectric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bul,;xvb i mf*a 7l3ysn1dbs)
would you expect to be the brightest?

  00.03: Which of the following statements is y 26b./c, r t8tqsjjifNOT true concerning the simple circuit shown where resistors R1, R2 and R3 arey,t t8. r 2cifsq6jb/j have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a + *(/h0d,j9pou,g qiol6p4aorebzr f battery. 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 onrp,g4u0aqri/*jo hpo6b(dzoe 9fl+,e of the following choices best represents what is observed?

  06.34: How many coulombs will pass thr *at5hgml)ww.+ff +cxough the identified resistor in 5 seconds once the cir+fl.)+ xmg a5ft*hcww cuit was closed?

  00.23: If all of the resistors in the followiko7 mq o6hz0r3e *0rnkng simple circuit have the same resistance, which would dissipah7z0 0 n3oeq6*rmkrko te the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω resa2n 3vs+ei uw2m39fbzistor is 1.0 A. 3mnw22bsvzif+ a 93euWhat is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battektl(uf3uhf25 ry. Suppose R1 carries a current of 2.0 A, R2 has a resistanc2 ul 5fht(u3kfe 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 zu.p li;,4tx lin parallel to a battery. Suppose R1 has 2V across il;tz4ul,xi p.t, 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. 9rzssrm: cw5:k8kn ;z What is the maximum value of the current under these c:kczmr s;r5z:kws98n onditions?

  99.23: What is the resistance of a 60 watt ligxh 211w9 ur2embpjqg7htbulb designed to operate at 120 1p2be jm9rg hu 1w72qxvolts?

  03.09: How much currenhkv rf09-kdz;l- +hqet flows through a 4 ohm resistor that is dissipating 36 watts ofz+eldf-;k0h v hkqr-9 power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.” Inqezsp 11ya/ loglh 36. normal use, the current in it 6 .eglsz/l1pyhq3a o 1is

  01.05: Which of the followingl+bw 8d hm*d/ 6c6xe)rq:b bdf resistances could NOT be produced by a circuit containing only three identical 6Ω b6c6xd+f )qb hw:8ed/l *dmbr resistors?

  94.37: You are given three 1.0 hk j.zpa9-xv+p- c0zg Ω resistors. Which of the following equivalent resistances CANNOT be produced using 9p-gpjahk-cz0 . +zxv all three resistors?

  02.06: Three resistors of different values can be coi6vn.( 52 os)xpqwlplnnected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be produced?oxl q5 .i)pv2wlpn6s(

  97.35: When a single resistor is connected to a battery, a tota3tf0t q y;yz 01uyi3:xs:zjc nl power P is dissipated in the circuit. How much total power is dissipated in a circz1;t3yiyy:tx0q:3 j unc sf0zuit 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 resistance R1 and R2, are connecte658v : tcys8w eak71rvy1 a qfsuw3ep7d in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the r1 6eryy8eka31ws w5 8t7a7qsc v:u pfvesistances is correct?

  02.46: A hotplate is designed such that it tx5+iz2 fjof af5c; a 4 s-*kd:xtsxo;has a resistance of 12Ω when operating at 120 volts. Whatxtdo 2kfx*a5+ f az4ojx: s-tsi; ;cf5 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 t9/ya61 j )m8xwobpttghrough a 4 ohm resistor that is dissipating 36 wa6 pjg8m)btot/a1y9x w tts of power?

  01.24: An electric heater draws 13 amperes of current when connecakmhn *7x:d.r ted to 120 volts. If the price of elem:dax 7.*nkrh ctricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much wouldi5 )6 loxzh0wak stdg44q6t .q it cost to keep a 100W lightbulb lit continuously for 1 year at a rate ofoqqkgl5 4 tt4z) dx.wa0 h6is6 $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power o,t)4q 2f pvvcff 24.0 W associated with the bulb. Which one of the following choices be) tv,qv 4f2pfcst represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a comp y1mkz4h4)u- g;hn zyg wi-sf7uter rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circ gmys1h 7z-nwk4fu-z;y)gh4i uit 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 resistors ta e tqo;5x2hyo,.rfo e8pjon)w (k:ry 6cc, q0o form a simple circuit as shown to the rightoo)rck , tq6h:qofy0 j,p( yaeow2rn.5ex;c 8 .
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 tooz7w0*w* jiy h40x xls form a simple circuit as showny0 wlxs0zi7h*4wx j *o 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 ide;w,: b e.omykhq8q x+ial ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagr8 whxo :q ,.eym+ik;qbam 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 resimopj:+.bl2qcek xmha7 n4w q6 vaj (/:stors are connected as shown. With the switch open as shown in the diagr:q.mw+6e 7 / n lpch4joj aa2mv:kqb(xam 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 id 6 ly xwlrej+opja2405eal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. pjw26yl ejr+a x0o4l5
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the ri)mn: 83s+hn d raq 3tnmtuw/g9msw,h 6hgrj(5ght, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all thrd/wn mat3h gshj6s5h3, t8qum: n9gn +)rrm(wee resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to therky2m rx52 *ylb*s /tg right with resirm g sk2yx/5b tryl*2*stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combz4 ow hgy662fd mg)s;sinatioz66soymg shf w)g;d42n series and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows ,ljryokz wwgv5d/ m:pi1t8g4:v e(c3five identical resistors connected in a combination series and parallel circuit to a voltage sou (dtcy3:e kj:4gv5v/zw8pmwilgor,1 rce.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bum91ldtj;xo uhk/c;0 qlbs are identical. Which bulb will be thj/txhq 9m ;;10cd lokue brightest?

  02.21: An ideal battery, an ideal ammeter, al) zugj kbf 5*)y8wu8f switch and three resistors are connected as shown. With the switch open as shown in the diagram f kwg)uul zyj)5b8f8* 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 connv gz/k)fuv+wqz -y j3;ected as shown. With the switch open as shown in the diagram the ammeter re- ;jyfku/ zw+qz gvv3)ads 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 anm(mp;q+yi fw4 d three resistors are connected as shown. With the switch open asmfiq+ym 4w( ;p shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?