16.09: In the circuit shori2 i9vl (ik/pwn, an electric current exists in the metal resistor connecteip/ii9v( kl r2d 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 parallelu g mm9y*ly ,rb56 .m+lzndbh5fq;2 rs, the_________each resistor is the s 5m*y nq6ub+ hgdm zll25 ;,9m.rbyfrsame.

  06.33: A current through the thin filament wire of a lige8x3 n3i/m m0e 44moc, s yc3fhuxk/pphtbulb causes the filament to become white hot, while the larger wires connected to the lightek3n3ism0 fcm,8 h y4xem4xo/p/cpu3bulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is the967/l bh0ytu:lx:;ze okidws acronym 9ol/ 0 zx6ts:dk7e:hiylbw u; for which one of the following choices?

  05.16: A cylindrical gt: s vt.6+/ykj yraq2graphite 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 of the new resistivity t+/g:k st2 vqr yjtya.6o the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the 3k,pw7 n m)t+3yvdivkbgwy4t k7t42ysame material. Wire II has twice the diameter and twice the length of I. If I has resistance R, I iknpbkv4kw wv tg2,334d7 ytyt+m )y7I has resistance

  99.31: Wire Y is made of the same mate0ve tmf/3wtj igx3b5 /bp9..nqkc0lrrial but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a remtrtw9 0/k jl.fxncb53bep/ i 0gvq.3sistance of

  03.23: A cylindrical resistor has length L and 6 g2/48f v;ouscqf/ s2qdblfiradius r. This piece of material is then drawn so that it is a cylinder with n fqq/4 osbfl/22cvgs8;f ud6iew length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decide.4lk- j5scpfnt k9+ss7 7msegs to modify the filament. H5kl4f s-ss.m9tn +7k7 epgs jcow 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 the same material. The lengtui7tdo7m7 (igh and radius of each resisttm i 77g7udi(oor 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, ecz,o :yglcf5 vn( nz))ach of resistance R, are connected to a battery in the following way: “zz coyf (v:)gl 5,)nncTwo 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 arrangement of four resistors?

  95.35: The voltmeter in tej5b z,2z*.dso6qtaq he accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The amm d2joz se*,b za.65tqqeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to th5 use3; pqult,e right. The three bulbs 1, 2, and 3 - represented as resistors in tp,ul uq3t5; sehe 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 curr5j yyuued/cam;0gwtr(l0/p o;gc :9so ue(n0ent in all three resistors is equal, which of t0elo 0j:(9apuu tw 0og 5;ydc; ycsu(g ern//mhe following statements must be true?

  99.37: The diagram a:kx :f0ljbvzsqq+)+j dj: rh4t right represents a simple electric circuit composed of 5 identical light bulszx)br++ ql:0q: fvdj4 h:jkj bs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the t: x)j -s3/lqpk 7(til.u pidwfollowing statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resi t t l/d7ik-)(w3x sijqp:lpu.stances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is brq)imk h1q0 r5uighter than bulb Y. Assume all circuit elements arei)1u0mqr h q5k ideal. If 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 w*x *f7o,2kr n uoq7p/cyjr.hwill pass through the identified resistor in 5 seconds once nwxyhrru2c 7kq*oj/7p , o.*f the circuit was closed?

  00.23: If all of the +5k u msr;j h+7hfgurln3d 04cresistors in the following simple circuit have the same resistance, whig j0ch7sf+r lmnh3u;u 5+dr 4kch would dissipate the greatest power?

  98.34: In the accompanying circu(qqd rk97(r: qo o+odait diagram, the current through the 6.0 Ω resistor is 1.0 A. What is th7:ra o(rd qqkqo(+d 9oe power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a y sg4((uda4bro i d78zbattery. 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 iyrbou48 dad( 7g zs(4voltage across R3?

  99.40: Three different ree y n:v9y0 +hphe xop,vymx326i3roz+sistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has pvheh: +y3xem,yyo2nxrivz 3+ po 96 02V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated muvu2i fj8b3de+w9 /c1200 watts and 120 volts. What is the maximum value of the current ud/ b+8 miwv2u jf39ceunder these conditions?

  99.23: What is the resistance of a 60 w5 rpivx- y q.i;m1pmz0att lightbulb designed to operate at 120 volm;0 5 r1ipvip .yqx-zmts?

  03.09: How much curr2t sxc,p6/ b(;tgpdk+dkfyu(ent flows through a 4 ohm resistor that is dissipating 36 watts of +tg dkps(uby/x tcf 6;p(dk,2 power?

  05.21: A household iron+nk21 -gw93ht c8breh8ccoqx used to press clothes is marked "120 volt, 600 watt.” In normal use, the cur3+ c9kg-cw1hnx heq 8r8b2 otcrent in it is

  01.05: Which of the following resistances could NOT be produced by a cz,c*xl-5k u-zjn5lm p* cmj. dircuit containing only three identical 6Ω j.*m5-c*n5xlz -j c,pzmkdul resistors?

  94.37: You are given three 1.0 Ω p nzt1aj 1)vg mnb,9i2ve3fx ( resistors. Which of the following equivalent resistaj2 a1vip93 vgte)x z,(nbm f1nnces CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be coba+aa;xd q)y 2nnected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistay)x2adq; + baance can be produced?

  97.35: When a single resistor is (;h3jy 9tec6;302,ayaru hli qrqzyu5kk)a i connected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identicalrk ar;2t5,;chyju)ze q aylu 036k9yhiaiq(3 resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistan+gi1dsc 5yl 5kce R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the followin5+sdyic1g 5k lg statements about the resistances is correct?

  02.46: A hotplate is desi-fclg9(bmj) d.v w np4gned 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 kg of - ld p.n9gj)vb 4fcmw(water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm n62qp 8bga;)cb rml5rresistor that is dissipating 36 watts omar ;28 l)nbb 6q5rgpcf power?

  01.24: An electric heater draws 13 amperes of current whfm/( c,8bdhim en connected to 120 volts. If t(m di,f/mbc8hhe 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:ggz3z1-y lf p to keep a 100W lightbulb lit continuously for 1 year atz 3:yf p-gl1zg a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb res6/d,;png +owspeui3 nults in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resis,n+6eg3su p/; i nwopdtance of the lightbulb?

  01.10: Each member of a family of six o 9 t;gr6feev*kwns 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, whae;g6 tvk9erf *t is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple circuit k76m 3bwbk) :vj3 4f6l1duexuzlvfi7as shown to the right6bu4 mfzull7kx33fw 1 v6e:jikdvb7).
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 to form a simple*+9 miuc;/i elqxzhh , circuit a9l mi /q*;xiz,c+hh ues shown 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 ammet euwe8 g*f-:+k r(yw/g8r gd2ysrv7 oper, a switch and three resistors are connected8+e druwvsf2oy:/- rr7e y8g*(gpkgw as shown. 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 sye,e s7 rja62du+) lzxrk3 o,ewitch and three resistors are connected as shown. With the switch open as sho )rzloekjsy+,7u 2ax,63deerwn 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 conn gysg15nka)+8l7 hw nrected asrh +yn18ns7gg w5 lka) shown. 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 right, what is the equivalent resistance? q p:7tx3fb*vi)ytno jx*) ys) Assume that all wires are ideal, the battery has no internal resistance, and all three resistors havjy:) n ipvfqy )3st)*b*otx7xe identical resistance R.

  09.07: The equivalent n it.7egh4o6.ogeo0 d6cp) bz0 *x dmsresistance of the circuit shown to the right with resistand.op.0b6g67d*xt s e ezcim0n ho4)goces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors conn)rtebn ca) dei fbb7: 33h0br3ected in a combination series and parallel circuit t3a3:b b0)f73i ehrnret )dcbbo a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combinat g,od*qub8w :5f .vrfpion series and parallel ci:dp v,8bgf*.o rw fq5urcuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of bhka 8r9p avdi(d4 *)xthe bulbs are identical. Which bulb will be ta9xdvd8abk4p (*)h rihe brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resakih 2q; k.*j9hqim3b istors are connectei 9kbk2a;h*qjqm h3. id as shown. 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 ammetj:;fj aw.t7 pwq32sin i m+i(eer, a switch and three resistors are connected as sho:pjafei tw.; m +i2n s7iqj3(wwn. 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 andwks3z.4fqja: 6. ajx00tlkbd;yfg yk )6x r4 s three resistors are connected as shown. Wi;.a3a4rk. kzlf kwf6 js)y6:y00t4bdjq sgxxth 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?