16.09: In the circuit shown, an electric be /:np +xarx;j7: gb ecm/j,sfoow 87current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of eleb wjxb sp77 fma ,;+ne/ xceg:ro8:o/jctron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connxn)6rx:, msid ected in parallel, the_________each resistor is the d)s 6,xxirnm:same.

  06.33: A current through the thin filament wire of a lightbulb causek u+ (xn4xgrn:s the filament to become white hot, while the larger wxng:+xu4n k r(ires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard househu2dyxqpn85 w8qz8bo- old lights are being replaced with LEDs. LED is the acronym for which one of the folnq8 p oqy58x2w dubz8-lowing choices?

  05.16: A cylindrical graphite resistor y t jd i0:xfo2-*9ac)vnk,xlnhas length L and cross-sectional area A. It is to be placed into a circuit, buti 2) nxf-y,l:v 0kja9*ncxdot 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 n60*7xukg9jn9244 lttuow *ki gu vgv ;+hsmmthe same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II hk2 tm94gx7+gvv * n*4u60tokuu9mjnws ligh; as resistance

  99.31: Wire Y is made of the same material but has twice the diametekypzoxj;p:2xsm 9;x 3r and half the length of wire p2 xmo3jsxxp; yzk: ;9X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical rlw75bj-6k h9uu tg2pu6 k)nuh esistor 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 resistance of this material because of 25guuphu 6bw 7knth6uk-l)j9this process?

  07.27: A junior Thomas Edison wants to make a b . ess2wlb0nh-righter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given volbsshe2w-l .n0tage?

  16.07: Three cylindrical resistors are made of the same material. The leyi3fug0o pbtt ph5+:6ngth and radius of each resisgtp0pyt io+u53bf:6 htor 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 battc/h66smqib v x ko1-pp*u8h-wery in the following way: “Two resistors are connected in series. This combination pih6b/ sxp v6h-*8kc-m o u1qwof 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 accompanyic a* ;is:dyf(d:6 edulng circuit diagram has internal resistance 10.0 kW and the ammdfud c a;si :dl*6(:eyeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circum(c.7 ;xe r+a2sdqir qit shown to the right. The three bulbs 1, 2, and 3 - represented as resistoi2(.qa r+7; c qdsermxrs 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 current i 3rsx b)4.kqxd3.vbc tn all three resistovb3.xdsxb4.q3 kctr )rs is equal, which of the following statements must be true?

  99.37: The diagram at right representszpud q a/9ts,7 a simple electric circuit composed of 5 identical light bu/ t,9dsz a7qpulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simplel3mbla7v: 2 w,p2 5.yixicgvm circuit shown whixmc7w :5p lagvm,2v i3b. l2yere resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY ar u0hvd7le+tx.9s 9oe ye connected in series to a 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 one of the foll 9u +v9ot.lx7 sy0ehdeowing choices best represents what is observed?

  06.34: How many coulombs will pass through the identified resistf e jlx.zom y0m,/nigr981o3tor in ,ojft.elyz o0r 3 /xnmm819 ig5 seconds once the circuit was closed?

  00.23: If all of the resistors in the following simple circuodq;0jd o ,8lh)h/-y eimyol 9pz k4-tit have the sa y0himtz)p4l-9/;dhoo,l-qo e k j8dyme resistance, which would dissipate the greatest power?

  98.34: In the accompanying jteoqa ;5x2vyha+ x.6i yh4n;kh9y4s circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is 6hayh4yi9vt5;ox; eh+.2q ja sykx n4 the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected0,4olq)gcqyu22z z-wy5pm rm in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 disc q ropyzgy2 5ql4w0 u-,m2m)zsipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different ,3 e 5sm+jetoxu2,ta uresistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What i+e xm52 u,j3aso,e ttus the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 vol.7ohc rr(; bhy5lpwhy isd-(: ts. What is the maximum v bwr l.pich(:h7r;dyyso-(5 h alue of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb desi)ys9 8v*aw1bolv au+j gned to operate at 120 vol uy)1 ba *+s9w8ajvlvots?

  03.09: How much current flows through a 4 ohm resistor that is dissipating.jdt5 2/zm jyh 36 wadj /25m.jyz thtts of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 wa4or j wzt8e.7:s2h3zyiws ; uttt.” In normal use, thzw783z.:;yuiot2hers twj s 4e current in it is

  01.05: Which of the followc:fzm kxhh0t,z1d.a1. -exuhing resistances could NOT be produced by a circuit containing only three identical 6Ω resistors?.-01 e:x,h kcfdhtmxuz1zha.

  94.37: You are given three 1.0 Ω flll8+- 91yrj xr /xzva.vf3cresistors. Which of the following equivalent resistances CANNOT b19xrr8alll/c - 3vvfjyfz +.xe produced using all three resistors?

  02.06: Three resistors of different values can be connected together xq+w)ggwj(uxxqcv c fn5;yo+:3j,/ j in different configurations. If aljj;fw+5 vjxw+ )q : q/ xcxguog3ny,c(l three resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistorl +mnp107bx;pi k zjnkilmn;i*s /.k , is connected to a battery, a total power P is dissipated in the circuit. How much total power i;m npjn*ns1m0+p.ib kxz7il;l/ i kk,s dissipated 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 resistav6 yq3qvk.lt 1 bk1aq:7 ee1wynce R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the followi11 6q.ba:le7vv y3yke q wktq1ng statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when v(0 *dtf3uhsi cs53u woperating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg scd( uhi3svf3t5wu* 0 of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is 2 yf/sra rf 3f:2rq-l4p)+jkns jkmi6 dissipating 36 wattsq63 jk-f sr+m k:ypjslaf4n2)f/r ri2 of power?

  01.24: An electric heater draws 13 amperes of curren8j.j(hia bd 561juj lwt when connected to 120 volts. If the price of elij.l(b w6j8dj ah1uj5ectricity 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 luy zfutl9)2pvd:t o2*ightbulb lit continuously for 1 year at a rate of*l:tz2u ov 2uyt 9fp)d $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulbt4axj8 lf1+x j results in a power of 24.0 W associated with th 81lxf4txj ja+e bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer ra w nduk78b6ei3q1+htlted at 500 watts in a 120 V circuit. If all computers are plugged into a single circuibu+ eiq6nd17 l3wk ht8t 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 to form a simple circu9qeh ffnj z11b1jx)z9 it as shown to the rignb11)efx zjfh1 9 jz9qht.
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 fouhmsc; 22ie5w l5iw 0glr resistors to form a simple circuit as shown to the w5h 5m2e2lsii0;lg w cright.
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 au q7a 1/v(+paao -l*agk3cbji v4zy;switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammet * b1coaa/pzak+;7 q-uljgvya 34(i vaer 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 fvra(,s ;9h5 4/,r7xidk qw cd*j kwehammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagej4ih,xsd 95w kca;q7fwhv r/d*(, krram the ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battt/;n- z r wxeaq:.;f tcde2-lvery, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagea-tn;l/:qztv .w rf e;x cd-2ram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shownp zpr 4hw.c2a* to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal wz 4ac*.2prphresistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistany3..+ia tso5e i4qt:twkt,l gce of the circuit shown to the right with resistantsq.gl,wa+t .i 5 4:iyt tk3oeces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical rvdoduf/8w zpc j2s *7/vq+x7xesistors connected in a combination series and parallel circuit to a voltagezq xds*d vpv7f72x/+uowc/ j8 source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five ident1:qpt ja/ a/pg6n3bqtical resistors connected in a combination sq//t6 jpt1:an pqb g3aeries and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of thbwx;thqahje,o(b3 40 9 z6bp+ufjge+e bulbs are identical. Which bulb will be the brt;how+f0j (z9h,xe4qeb +bj u g36bapightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are con y4i5(b:z jbps60ni/fzfyr4jnected as shown. With the switch ope:ibf y/fjzybin454z 0jr p6s( n 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, xe e +c9(si6:k0wbhyz a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter c6hz:+k(xeie 9 b0wsyreads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ai(f-6 39rftdto vv yrkb- l0w(mmeter, a switch and three resistors are connected as shown6l kd0 tf-riv b-fytwor9v((3. 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?