16.09: In the circuit shown, an electric currents ,l-h jmfr50dgoky;/zzgt1 2ntk v)i 2ch 8-k exists in the metal resistor connected to the batterysrz 5k ; od-g,g ntkt12v) -h8h20cymk/fjl zi. 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 i-lgijx961e aare connected in parallel, the_________each resistor is the sam6a1j-gi le ix9e.

  06.33: A current through the thin filament wire of a lightbulb cause/het.z ( zu6ops the filament to become white 6po/uet .( zzhhot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is t7u,omq eg -noqz1.px.he acronym for which one ofn7ugqm-qoo ex1p ,z.. the following choices?

  05.16: A cylindrical graphityyrf : fjv:,j6-gr+ghe 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 to the hry gy: jrjvg+,: -ff6old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the sv3 l pt on542dsq,:erqame material. Wire II has twice the diameter and twicsoq345q:rnv ,tpedl2e the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the sama6t v s1ugu:jlm 2rqu -7y6si2e material 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 rguls:1t v6s7uu-m jay2qi62 resistance of

  03.23: A cylindrical resistor h;g p(v4vsmp7uf(qitpj* :yd ,as 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 bq,pg;f 4mj* d:(tspyi u( vpv7ecause of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bunmxm-30 vtt 1. segah.i0q1h ilb. 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 voltage?gqaenm.x 1ivt1 .ms3 -0ihth0

  16.07: Three cylindrical resistors are mad,kxlz. :0qf( (t;e+-geff:uf gqi bcje of the same material. The length and radiusf xi+uf gqlf0-jcet,ek.bq(:z(gf;: of each 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, dkg:c3c. p h-u;k2()lji kueo are connected 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 fourth resistor.” What is the equivaleguckk doi 2k.)3u c(l jeh-;:pnt resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internal resistwj ;m2 awkrgk(*tai1k pnp-) pi-jw4- ance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is mo4; a(1mwg)nw tikk-p2kp jj *irwp--ast nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbsa63fb lvd80 /g/ wvkss 1, 2, and 3 - represented as res83vgw0 a6/d/ kbv fslsistors 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. ck7p.l:wb4u p If the current in all three resistors is equal, 4.lub kp7 :wpcwhich of the following statements must be true?

  99.37: The diagram at r m7sdqg ,0o/uright represents a simple electric circuit composed of 5 identical light bulbs and 2 flas,qoumr g/d07shlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the follg w 4)ad dkl/gvzzn6 bp.s4 k//hn1/atowing statements is NOT true concerning the simple circuit shown where resistors R1, R2p1/n )zw4d lk.thz g64/a//vaskdg bn and R3 are have equal resistances?

  17.29: Two lightbulbs792(fz aypr0x+m+koqt.eq gz X andY are 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 eapm(goerq +f+2z 9k0x.t z7 qaych other to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the id+mnv7lb:. bav entified resistor in 5 seclva.7v+mbn: bonds once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit ha-fy prise764t efb( i pnx0xrju 3s;,6ve the same resi(bsxj04e x i;f36 ppryu-setf6, ir7nstance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, thebk h0nicy o va7 + 3gdxbh(+3)zjhd)a/ current through the 6.0 Ω resistor is 1.0 A. What is the poweak/xoh 3 )v)j+ zi(dchb3b gh +a0d7nyr supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a bat)twpsqrgh7tjm(0 ,xa2 81l lt tery. 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 voltage across R32ps70 mxarlq8 t) 1,wh lj(gtt?

  99.40: Three different resisto 4 e*uo:omf+pjrs R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 op*uo:4e +j mfW. What is the current in R3?

  99.13: A heating coil is rated 1200 t .-s5j0vpw5op kz0ktwatts and 120 volts. What is the maximum value of the cv5 op0k-j0kstt zpw.5urrent under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate ..3 (cgerxzpcstu)t8 at 120 voltcrc8 t3 x)( ue.z.gpsts?

  03.09: How much current flows through a 4 ohm resistor tcu e6s(p grmv*v e,p,3hat is dissipating 36 watts of pp36 ,eg rse,*(vmuvpcower?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watts*c yqueh f,xpsqw.21bt - *yq;i+ ss0glq4, h.” In normal use, h20hw4x q qfc;,qsyey t*-q *p, sgb.ilu+1ssthe current in it is

  01.05: Which of the following resistances could NOT be produced by a +(fsvge , o/xr 7)fqobcircuit containingseg,ov /)7 o(r+bqxf f only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resir 8f)obfv4z3.v.zle estors. Which of the following equivalent resistances CANNOT be produced using all threle.vb z)for.3 4fe8v ze resistors?

  02.06: Three resistors of different values can be connected together in differenmxu4l*t, nyn00), b/gn xypyrs *v0 nbt configurations. If all three resistors are used in a circuit, how many different values of total resistance can be ptnm),ps0n/n*,vlbg0 y x* x yyun40brroduced?

  97.35: When a single resistor is connectep qms3wvpx2zgdi b468w:yo,7 d to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in series using the same battery? Assume q:v8z2 p36omwx7 gw bsp4di, ythe internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connectd;0 j6r xmje(ted in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistancest;6j (rdxem 0j is correct?

  02.46: A hotplate is 4 f+e1rzgo ym,np7yi 9designed 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 o9f py, nm1 y7g4+zeri0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flowi2y 2izx7s9q3ac udt;s through a 4 ohm resistor that is dissipating 36 watts of;t7yqa3i cis92du 2xz power?

  01.24: An electric heater draws 13 amperes of cu+ +kkn)iz7 kld7nmo;urrent when connected to 120 volts. If the price of electricitzkkd+;omkunl in7+ 7 )y 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 lightbulb(1nsiv .o (hck roh;khdmi 9-/ lit continuously k(rh(i ih c sk9d-;.v moo1/nhfor 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4bp/dw75f.uz0zlb 1 as.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which1pfzb0zs 7 .lua bd/5w one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six ownsyr 5 )(vh +szsk7mf12n8asb rb 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, what is the maximum number of the computers can be operati1+)7bsm n8hyr25zrav ksb s(fng at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form/vk) /t.,pe mx3 :zcu;gmnnrci8ih g, a simple circuit as showu/e,p:vzc gxmnn)r;c3mkigt 8/ .,hin 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 resistors tbw*d )nn8z9fz o form a simple circuit as sh z*dnb)w 98fznown 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, a switch and three resis 4c+3 iqnm f, 6ggp87(nl xt:a4dyrwfetors are connected as shown. With thmi : 46a 8nfwtcxg3lyfgen4p(r, d+7qe 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, a0z 8 pi9cmt ,+pwl,fqcx js-1k switch and three resistors are connecte0 j w,lqx-c+m 9c1itz8p kspf,d as 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 switcg u24jp 2.mqnyh and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0.2pm ju42nq gy amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit(+p5djdnvn 5 j shown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all tn vj5pn5d+( djhree resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to -/h3tbf.ajx o the right with resistance/ajo-fxt .bh3s $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical res gvmqirj*0wfs8/v 7)i :atu;sistors connected in a combination series and parallel circuit to a voltage jv/ ;q0uw8a gm7sf iri:s)t v*source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combx 9:gt ea..b9knh+-z7escznfination series and parallel circuit to en x sec:7 taf.h+9z-kz n9gb.a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, a( ;6bz yf1xh wabl6bqohig, s4)u.,s)ek sv3ill of the bulbs are identical. Which bulb will be the brightest?g )4 b.s 6s(o ,slu3;,z1hea6vxqfwiy)h ibkb

  02.21: An ideal battery, an idh)utnm dd; 27deal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperem t; )2ddundh7s.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ammeteh q( 5)-ynsmun sgf3jr4tu.a 0r, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampesnj( 0s.t)muf g yur 5nh-q3a4res.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, rug 6(ve76 vku4hn3xm an ideal ammeter, a switch and three resistors are connected6v6 ngxvr73uum4 ek(h 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?