16.09: In the circuit shown, an electric cur -6*7m gzj,yzbncxn 8rrent exists in the metal resistor connected to the battery. Which one of m8n6 xjy crzzb,7ng-*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 resis ekxd9hndgwa(/y64pzog ++a em.: c0xtors are connected in parallel, the_________each resisto/ +n.oxzw 69p4x:(md aghy+k e0dec agr is the same.

  06.33: A current through the thin filament wire of a lig tybj y55w+7nohtbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain muchn y+jw57tyo b5 cooler. This happens because

  13.08: Some standard +,t0eo-p6z kvi +(yffgsh6dkz4vn +v household lights are being replaced with LEDs. LED is the acronym for which one of the following choice+-e6g ivopk,df 6+kv+ z h0nzystv 4(fs?

  05.16: A cylindrical graphite resistor has length L and cross-sectional areauy3sr;qsr ep zh(:7+b w4xvz . A. It is to be placed into a circuit,q7x pz+s4syh:e3 r;wbu(.zvr 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 old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the sfj-/ovn0 s:gv ame material. Wire II has twice the diameter and twice the l:/nvj g0fvo-sength of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter and half fc.q795 ilfir 6racc0the length of wirl c5cqr7.9if rfa6ic0e X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of materia/gqct( ; o,z geb3jmwtoq)s5-l is then dg mt ct(qbz oj;,gw3-)s/ qe5orawn so that it is a cylinder with new 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 decidesu/u.t5ct a-j+l kki2q to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at ak kuilq 2t+5a- tu/c.j given voltage?

  16.07: Three cylindrical resistors are made of the same 6ukqe )yw:yo +,xe:t qmaterial. The length and radius of each resistor itq,o):kyw6xuq +e e :ys:
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 : w,i t.b5odlkR, 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 thirb ,5td.k:owl id 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 circa1a7kx(jzxd* zc0d( -r xe o4vuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltm*x( zk d0j-xda1eov 4(r cz7axeter reading is most nearly:

  97.37: Consider the compound circee*n, pvy53nhuit shown to the right. The three bulbs 1, 2, and 3 e,e np *vn5y3h- represented 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 circlhkahz p ug --i0y-.,luit at the right. If the current in all three resistors is eqhg,0-l iuylhz-.-a pkual, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit i 6/i ; y5y5c2sqiixir dqgcm6+yk7zh)5xz+o composed of 5 identical light bulbs and +zsi)/5qyygicyqhi z+ d5x662 ;k 57ciox irm2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concogkk3 /1 eolu0erning the simple circuit shown /o3klkg0o eu1where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in se3dn5l *rlpr l.;fh e1zries to a battery. Bulb X is brighter than bulb Y. Assume all circuit rlnlz.;5 3he*df lpr1 elements are 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 willf8wo614q hosa6akx a 0q xv1 ,.soz8yk pass through the identified resistor in 5 seconds once the circuit was cx804aoq kv6q za oof xsya .8s,11whk6losed?

  00.23: If all of the resistors in the following simple circuit have the s*2d8knknt/ ab ame resistance, which would dissipate the greatest power?n* /8kdtban2k

  98.34: In the accompanying circuit diagram, the cu,ei / *shxz4 nphiu86r .g ls.nd7(vyurrent through the 6.0 Ω resistor is 1.0 A. What is the power supply vol /evyhg*s6iul(dnirnp7.x4u8 ,hsz . tage V?

  97.27: Three resistors R1, R2, and R3 are connected i jqa/p,rrx,3d n series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and /,a j,r3rqdpx R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel qh l f bag71r;eg:67jtto a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. 7g:tr;6g lb7aj1hf eq What is the current in R3?

  99.13: A heating coil is rated 1208bj6eci 9th:l0 watts and 120 volts. What is the maximum v 6tl 89ceijbh:alue of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 120a kf7skdj m-;p 5ur8z 8 3cwcu50xvzt0 volts?8cdta 0zx;c35 kmk-puus fw58rv0jz7

  03.09: How much current flows through a 4 oh+3gtadnj.d c3 m resistor that is dissipating 36 wand.ca 33gjt +dtts of power?

  05.21: A household iik1 uvt++g wy,ron used to press clothes is marked "120 volt, 600 watt.” In normal use, w+k1giv+tu ,y the current in it is

  01.05: Which of the following resistancejq6c;a/mop b/)vwb 3l d(aaw5 s could NOT be produced by a circuit containing only three identical 3ao wjm)c/q ;6/abvadl5(pbw 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of rvak y;*7vhg 8k /9-dzhjn7 vy;mo7nbthe following equivalent resistances CANNd y77hz;k97 kmjvhg b;- v8 n/ovr*aynOT be produced using all three resistors?

  02.06: Three resistors of different value.i jj 34foo1dq76myrss can be connected together in different configur jyj1ir.o 46mf37dos qations. 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 connecte/:ubp h;8hablftb(n 5d to a battery, a total power P is dissipated in the buh(fth b8:nl;/p a5 bcircuit. How much total power is 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 resistor hbs.1c 2r.bxu9i saq3s, having resistance R1 and R2, are connected in parallel, the equivabu29 .b s1.3cxasqri hlent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such tg:x8dlj3s);oi y/lge fcvg,ov f+5 -y hat it has a resistance of 12Ω when operating at 120 vol:8 g lvf c) ;gfy-d3sy+oivg,xeo 5jl/ts. What 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 through a 4 ohm resistor that isvqm 4bjd4. ,1pwb)(yqj/bs rm dissipating 36 watts of power?jmdb,j()v1 b4b .s4mwyq/r qp

  01.24: An electric heater draws 13 amperes of current when connect)+8cti nxu 9wz9eax) ap6g5ag ed to 120 volts. If the price of elect 9n ez96g)x58)ipgc+a axua twricity 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 qz-g6z88 vwkxw6f u8ito keep a 100W lightbulb lit continuously for 1 year at a rate owuziv8 kgf86w8 zqx -6f $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb resulz4x jnc)mh w*.-d( lms6x e9omts in a power of 24.0 W associat emxlzm(jw9 ox.)*h6n-sdm 4c ed with 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 rated at 5f0w .8tl+vohaq.dt :a00 watts in a 120 V circuit. If all computers are plugged into a single cir:8 attfd+v.0 qlh.aw ocuit 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 resi2 2lhdsn(pr+k stors to form a simple circuit as shown to the rig +p (knr2sh2ldht.
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 f;rc46j. znlq gjurh.8our resistors to form a simple circuit as showj4cuj6..r ;rz lgqn h8n 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 ammett8a0btiq2 r cmx(8- jfer, a switch and three resistors are connected as shown. With thcb- tm fjar 2ix08(t8qe 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 switch / t(iz)0swipdzfw+ /j)et)/v n*ftg dand three resistors are connected as shown. With the switch open as shown in the diagram the ammeter d/z/*0n tw p(vi zift)sj)fwt)d+e/greads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammete7/bwc1kf, bh elhx/:gr, a switch and three resistors are connected as shown. With the switch open as shown in tx/c/kfw g1 ehlh,:7bbhe 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 rs 5z rp x2as(ir4ac:w3ight, what is the equivalent resistance? Assume ts5 ra3:r2 x4w(cpa szihat all wires 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 to the right qzkx3c,dq / 9.dg1jkk with resi /x,kd cjqqd9g1kz3k.stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resis1i1gwp u4j;ul tors connected in a combination series and parallel 1wupug4 l1;ji circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five ideny- -ao 5v69neq y+xvnue6k/rmelj+c0 tical resistors connected in a combination series and parallel circuit to a voltagn-e+ 66q5-lm aeuvvje+9 y0n yrxock/ e source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the buz0yhz f+ 30kwdoz.u n+lbs are identical. Which bulb will be the bfhown kz 03+.y+ 0zdzurightest?

  02.21: An ideal battery, an ideall4m6 sfcc i)4h ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the dis4 ) 4i6cflcmhagram 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 am26h0f wnf*j 2b hjds)ach m8 ;0iddg4ometer, a switch and three resistors are connected as shown. With the sf 8dhnfhdahi gs0j 2cmd4) oj;0 6bw*2witch 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 thr.qoam; ik3q*q3 b+vmsee resistors are connected as shown. With 3 3moqkmsbq a;i+*qv .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?