16.09: In the circuit shown, an electric cuo:iqj t 7m j8bjym*h1(8l.l nerrent exists in the metal resistor connected to the battery. Which one of the followib i j 71: jlmjemly8.tqnh8*o(ng 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.j4d,; pg z2 os7v3wuzv9c. iadnbmx; , the_________each resistor is tvi,sbo 9nj. az pwd .7v;d3;2xgucmz4he same.

  06.33: A current through theuozh+m) g w;o;pu3e.y dd(p+js wk* o1 thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connecyo p;d;u1 3m .ow+z*uhjkwosdp +)g(e ted to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being ,mpaw8rutk; vgv q ((jos; z0.replaced with LEDs. LED is the acronym f( , (;.stwo0mjvu;kpagz q 8vror which one of the following choices?

  05.16: A cylindrical graphite resistor has length L ajdk12 * 2oxralnd cross-sectional area A. It is to be placed into a circuit, but it first must aord2l*2jx k1be 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 smh48tk5(5g jarq3i1 l qqus.II has twice the diameter and twice the length of I.i.krs(a q 55 s4l3qg1tjhqum8 If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diaajpj-+ ql nocy,dotm w,r8sa5r4e -) 1meter and half the length of wire X. If wire X has a res- j1l, ja c mrnrqts5 ,)pdoy4o+ea-w8istance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius ox1c*c0wm o3 9i k10*y gyxsdtr. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this mater1xw31t9mxd *s ocyc 0kgy*o0i ial because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. Hmv2/5v r4tzu m5tm0j de decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light a/t5v4mvrzm t5 ud0m j2t a given voltage?

  16.07: Three cylindrical resistors are made of the same material.ikj)nv : k,p4,eesr5ijgd1(y The length and radius of each , i(dv1pgns,rij:)y5jkkee4resistor 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 i*8:hycqtb.; ;fiwg hqs6tzp (n the following way: “Two resistors are connected in series. This combination of two resistors is hzqg hwtcp*6(b;iq:f;s 8y .tconnected 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 accompanying circuit diagram has internal res 8u:0dtk0+sux3y j,b hdi 8mfqistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading qk+j 38bi0sx y mh8tduud,0:fis most nearly:

  97.37: Consider the compound circuitv-- wz w-y,ioh 9sf(gl;xs:nb shown to the right. The three bulbs 1, 2, and 3 - represented as wv,b:-i9 x (-gwznl;fo- hssyresistors 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 in g+cnc l*ts7; x+gga(wxxq ,(yall three resistors is equal, which of the following statementq;(xactwcl g y,gxn 7+gx(+s* s must be true?

  99.37: The diagram at right represents a simple ( c cozu1m8.d) h.gqu( arm,mcelectric circuit composed of 5 ide mgo,dcu.(cc.u(qm 8h m )1arzntical light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT tli. sw7i7,88ggi66t zb xtdo true concerning the simple circuit shown where resistors R1, R2 and R3 are havew7tz6b78gil8dot tsi gx.i,6 equal resistances?

  17.29: Two lightbulbs X andY are connected in ser;dr5wnyl,4cslf*y1t1 jf z) oies to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are idedlj; s, nf1oz1 rc)5f ywy4lt*al. 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 (lbtl2( teq;o will pass through the identified resistor in 5 secltb o( e;l2(qtonds once the circuit was closed?

  00.23: If all of the res p7q*,sw;+;ksdwpyb uistors in the following simple circuit have the same resistance, which would diw;7dps+byp *k;sw,qu ssipate the greatest power?

  98.34: In the accompanying cm fnqz;5)ow,/e doj7 circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply voltag ,dfqnjw;m)c /z o5o7ee V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a bat0g1nauem,0 k2b1bt pntery. 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 u1 0nb mp10bae,gntk2is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in pi ;d 6m0aa4prucdub3c r.u0u ;arallel to a battery. Suppose R1 has 2V across idr 0ac6u0b;c 43 u;durmpau i.t, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 war/tet0im ; pt4qg*/shtzv:z6 tts and 120 volts. What is the maximum value0tgt;4i q/mr p tzz6evs*t :/h of the current under these conditions?

  99.23: What is the resi scud;g6:(b:vi so ei8stance of a 60 watt lightbulb designed to operate at 120 i:u8sogi6ec(;: b sdv volts?

  03.09: How much current flows through a 4 ohm resistor that is dissipatiick;r*05z cuy ng 36 watts of powerkyc*5 cu; ri0z?

  05.21: A household iron used to press clothes is marked "120 volt, 600 wad :j9frb:)4zgy f7s jctt.” In normal use, the current in it ) : 7zj4jcsyrfd:fb9gis

  01.05: Which of the following resistances could NOT be produced by a ci6kc; z1mdt8yqrcuit containing only three identk;y8c6dt m1qzical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the fovr4+nf t0 4syk f/ 1rptbj;jg)llowing equivalent resistances CANNptrftb+ g j401n y)/svf;rj4 kOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together in diffe1*pywgyp +qq9rent confiq*y9 wqp1py+ggurations. If all three resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a total pogy3 +uw,v-) f3zio(djem;rvgwer P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are conomu dg ( g;rj)vfv wyi,z-33e+nected 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 connected in paralle9vmyw it 3.lo1 t2ho:vl, the equivalent resistance of the combinatio 2lithm9 3oo:twvv.1y n is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance b l*q0zwa .- xrr9e8tie n50wyof 12Ω when operating at 120 volts. wr 8qi0 n 05x*btzyare-.w el9What 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 thro c8s0z,0 vzmueugh a 4 ohm resistor that is dissipating 36 wat8v sczmu00,ez ts of power?

  01.24: An electric heater draws 13 cb;usd650 cwmigjd/ hs,*dopfp .96 zamperes of current when connected to 120 volts. If the price of elec9u ;gs. o5,dbsz/pc*dpm66wch ji f0dtricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would it (so r cp07kz,,;e hnxdcost to keep a 100W lightbulb lit continuously for n0z ,; x(7kpr ,ocdesh1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb resultsf27yzl/;ks z p in a power of 24.0 W associated ; 7/pyls2zfzkwith the 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 rapu*z.v; rx2n hted 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 maximum number of the computers can be operatinh r2 vx*uzn;p.g at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a opq-y1 z:(5 hib ya*xhsimple circuit as shown to zy( 1qxayh ib:-o*5ph 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 fot.,vyfmy* n8e ur resistors to form a simple circuit as shown toye* 8.f vtyn,m 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 ideay jk;p9apx.3ol ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampere ;j3 9kpo.xapys.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal batte 7z n-phmn7k5r:uhnxil: q6 , i9i67inf3xyphry, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open5i 7ih67n 7rxfnklqux3n 9i:p -6 i h,z:mynhp 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/s0ns atp9h 2 v-kh pzbwaj;+mfyg02:, an ideal ammeter, a switch and three resistors are connectedg f:zhw;sjys0m p9ntbvk-ahp+20a/2 as 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 thhp;ugncx 2 )o9e right, what is the equivalent resistance? Assume that all wirecp;2oxghu n)9s are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown t(+p+a n5.ibqu zmkb 4to the right with resistank q.i pn5 mtu+4azb+(bces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows fivcnibn:lh yr 1 ,0pj0z7e identical resistors connected in a combination series and paray0z :p7 jn 0ibn1hrlc,llel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five id)jnucl/6 0syr entical resistors connected in a combination 0r j)s6nylu/c series and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit g gm7o*p(f-6.vzr uj( gezr) j diagram, all of the bulbs are identical. Which bulb will be the brf7 m)gpj(e*gz- o6v. jrrg(zu ightest?

  02.21: An ideal batterqw, swg9up4m;oey/9x+lb 4 t9ubsq e.zdo.0fy, an ideal ammeter, a switch and three resistors are connected as shown. With the switle tx q4wfy,9 4+.q 99dp u/zoswbbgsoem;u 0.ch 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, anufs r jdg) ag58f/z)d( ideal ammeter, a switch and three resistors are connected d ffgrza ()58ju)/dgsas shown. 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 and three resistw-8 o nx6.,sy vpc.tezors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampeys6vc .,z .-twn 8oxepres.
When the switch is closed, what would be the current in the circuit?