16.09: In the circuit shown, an electri0ocz l0jbl:jf*z1k/bdx j;ie((e q4 pc current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the rzb:kq4jldx o1ij*jepb lc/f0z0 e (;(esistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resih1sx 1i rc fc9*wc1wn.stors are connected in parallel, the_________each resistor i w1c . 9rh1csxwnc1fi*s the same.

  06.33: A current through the thin filament wire of a u;lff-nf6v w 6)5twqqlightbulb causes the filament to become white hot, while the larger wires connected to the lighv-qlq5 f ;6wnw ft6f)utbulb remain much cooler. This happens because

  13.08: Some standard household lights are being repl( kpr r6l2fv52lb tsbh5q/d3saced with LEDs. LED is the acronym for which one of the fo bpl/r2sl 6q5fths3kbd r(52vllowing choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectionwh605fusn2ygymv 0js:q rw;/bu/2wxal 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 old resistivity of the cylindrica06 q05rgsuwwy y b:jh/n22m x/sw;ufvl resistor?

  98.20: Wire I and wire II are made of the same material. Wire I,q1g hf-pq(*,c* ifqmkr x mqd+5x 1mlI has twice the diameter and twice the length of I. If I has resistance R, II has resistanc*q xmmfc gixm+*5,kf,d ql-h1r(1pqq e

  99.31: Wire Y is madubuncr*2okxd5u 6wid1r2p8ix6.grc *0q k-me of the same material but has twice the diameter and half the length of wire X. If wire X has a resistance oqk*d k*w x2b8m605.pirori u2nc-xdu1c 6ru gf R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r 6few2ks7: 2g0 0f yjt ilpsf/z2nj;lh. This piece of material is then drawn so th0fwf zsk e tll7jf2;26/pj s gyh:0in2at 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 yv-yza:z c vetc;a g3o7;:t y*bulb. He decides to modify the filament. How sgc:c;:3y v te-az o;atvy7y*z hould the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistorvao0 :rj )esby ;2uu1s n8/xdys are made of the same material. The length and radius of each :ys) adyn u1;2u8s evrox0/jbresistor 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 conni h;yj4 js3mu*ected 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 rj 4 s3*imj;hyuesistor. 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 has6fgvo56d :h qbzas n*: internal resistance 10nd6b:o5f q*agvs6 z:h.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three j3ux7,kz82 c +d*y2bi nyobe hbulbs 1, 2, and 3 - represented as rebun7+2 d *kjy x c,3obiyh2ze8sistors 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 inw1h w0ypl z2mlgbc(16 all three resistors is equal, which of(z 0chlb1 6 wlw1p2ymg the following statements must be true?

  99.37: The diagram at right repreg8dn9z)yym 2, a(g 7j,xopoa** iakspsents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bulb*pgyk8as*j 9,7, dpayz go xa2)o(i nms)
would you expect to be the brightest?

  00.03: Which of the followir) 1vof dj,ui49lm7u+h. rvysng statements is NOT true concerning the simple circuit shown where resistors R1, R2 anvlrh).9sv dyo4,jr7ui+ fm u1d R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a ba vjc)fhbef. , tbp+fj)kl+8 -ettery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with each other t-ejpfc+hvb k, fb l)+ je)8f.to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identified resisto daph-:dd8k*ua eeo g)m uwr 1k(:1a6wr in 5 seconds once the circud1a kw:)8-dhp:r oduweugk a*am6 1e( it was closed?

  00.23: If all of th4r1k)aykq,v)p p zt i:u-tp7d+i 8lare resistors in the following simple circuit have the same resistance, which would dissipate the grr)ptkul8 qiv 7 -ya p4 ta:,1dpik+)rzeatest power?

  98.34: In the accompanyintzu / e(o6zqkf*nbq3f1 ybh re-w(v71g circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is thehb7 (fz /b1-q1zwo(f uen3vyrt *q6ek power supply voltage V?

  97.27: Three resistors R1, R2, 7zamcg ;ver+lk md754c 52lxmand R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. Wh7lkmmaxcvmd 47lc e2z5 r;g +5at is the voltage across R3?

  99.40: Three different6mq/su6 df pn7 resistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in6mufpsq67nd / R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. uam/+ wxpy0259;x n t 7bxjizsi:i 4yf What is the maximum value of the ii05mwstb yyz jf/+npxu;i:9 7 24xx acurrent under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designelxw*+x l- s3tilxm)*qu i8/wmfee. dd;s t3 4jd to operate at 120 volts?+q; xw8 xlw-dj tulsx.m *is/)4mte* 3feld3i

  03.09: How much current flows through a 4 ohm ae yk.zfi;kd9 84 t9hlresistor that is dissipating 36 watts of power?z 9a; f9 lktd8kh.y4ie

  05.21: A household iron used to presvomigr 1 v.di.msdu g8;40l;as clothes is marked "120 volt, 600 watt.” In normal use, the gm0.a8 rd mdsi.l;gov1i;v4u current in it is

  01.05: Which of the following resistances could NOT be prolq( .)mu+-(:skg,zcjaz2 iwmpv ru:lduced by a circuit containing only three identical(vzpsg)wui z:m q(+:cll ,m2 .-kra uj 6Ω resistors?

  94.37: You are given three 1.0 Ω revk/y44xd cm*7 4 sebvxsistors. Which of the following equivalent resiss4cvd/ mx7kv eb*xy4 4tances CANNOT be produced using all three resistors?

  02.06: Three resistorsqp3j, e no/a +1qcj7or of different values can be connected together in different configurations. If all three resistors are used in a cir nrojp17c,3e qa+q /jocuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a total pa6 9:j.a4p6phuv may kower P is dissipated in the cirh6auy :a m6pjpvk.a4 9cuit. 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 resistors, having resistance R1 and R2, are conneco7*+ j.q w:y3ldgdkdxted in parallel, the equivalen 3wd: jk*g.lqoy 7d+dxt resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate isekm +vn28zwcmn 3n+ z, designed such that it has a resistance of 12Ω when operating at 120 volts. What n3z+ wn+ecm82,kzmvnis 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 4ibk60 ruc5k/nd0b5vejykg (that is dissipating 36 watts of powj(05idk/0 rkcy vb56g 4eubk ner?

  01.24: An electric heater draws 13 amperes of current whes6m9(nf-)v nu8 sub ahe nr69zn connected to 120 volts. If the price of electrisr b9n)-( veh6anufzs9 6umn8city 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 norm,p(i x1/y lightbulb lit continuously for 1ion( ,pm/1xr y year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results ins7r n:oo vgd)qw4 jon30t*-ns a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistn*-od) rnos otn:7qs g0vw 34jance of the lightbulb?

  01.10: Each member of a family of sit gf9f3vo t , :xfuwr+utzm7**x owns 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 or,f3* +t7 tmu*vztg 9x :ufofwf the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple ci7dmudvt+x7 . drcuit as shown to tu dd77d+xm.vthe 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 resdqsd,45kcr;j,tq*u-z z/ 7djhtqy. oistors to form a simple circuit as shown to the5 dh7souz, .;q drztc-j/* dy,ktqq4j 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 resistors au,7xc)5rv t,(d qtdtwre connected as shown. With the switch open as shown in the diagram the ammeter readst,t,(c)qv 7rdxd5tuw 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal batteyv 0m) sv+edd*ry, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in *e) dym0 vvd+sthe 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 ammetjy - (ta63;rqd1a seyter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 at6eyr;-q(tj yada13 s mperes.
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 equivalen7 f2pmxk7nq(esy,l5 ;axyl u+ t resistance? Assume that all wires are ideal7lku maqefyn ,2+7xl5 ;(xyps, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent r-0el6wef+i y dnj* /fiesistance of the circuit shown to the right with resid0ej6+-flwe*iy / fni stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a comkz w *8v 3g0 zufpvrv./eb+0hibination series and pz8irvvke/+fgz 0h .v3*bwu 0parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below sho*xvoc74 dv(5pp 5 kaipws five identical resistors connected in a combination serie5pop 75(dic 4vv xpa*ks and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all o zo-eevn+bwgje vt6xel 6 :pav*wzf4,/(3;b df the bulbs are identical. Which bulb will be the bri6p b x:6devo,/4 j-ez3n wf;atw*e+bzlv evg (ghtest?

  02.21: An ideal battery, an ideal ammeter, a switch and tu.qm. lisv89jhree resistors are connected as shown. With the switch open as shown i9m.vu.ilqs8j n 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 ammq q72l:exs5eyzu muku )0jpkt+:au 21 eter, a switch and three resistors are connected as shown. With the suse 57x2: + 2qp0:)uu laktqzemyju1kwitch 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 s / ; y:oxhq2z5fr-ca):vhf5yz sa8d:5hsaql z witch and three resistors are connected as shown. With the switch open as shown in the diagram the;f5: za55/-yxhs q 8o2:fc:svhyh q azr a)zdl ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?