16.09: In the circuit shown, an electric current exists in the metal resist(41e o-dwurnwor connected to the battery. Which one of theuw( e4n1do w-r 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 are connected in paralle(wl p o;86saeel, the_________each resistor is the samspl( 6;8eoae we.

  06.33: A current through the thin filament wire of a lightbulb causesjg7g ax:8h rqnz*h7 6o the filament to become white hot, while the larger wires connected to the lighn*qgha jx87zh g7: 6rotbulb remain much cooler. This happens because

  13.08: Some standard household lights are being rem3x(reod 90z .ys3wxnplaced with LEDs. LED is the acronym for which one of the following choices?0(3zwex9 s3xn.mdory

  05.16: A cylindrical graphite resistor has length L and cross-sectiois aarw0b j+)l3zj ; ixa*/u)jnal 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 oldi;w)+iju)3baax/a * jrls zj0 resistivity of the cylindrical resistor?

  98.20: Wire I and wire II3e) bpr5-4ussai*kn 5 z3zp br are made of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has resis5ne s 5)zsr *abr3u4k3zp-pbi tance

  99.31: Wire Y is made of the same material but has twice the diameter and halowm,oxu gae 21e *i(k8f the length of wire X. If wire X has a resistance of R th(1moe ik*,8a xu2ewogen wire Y would have a resistance of

  03.23: A cylindrical resistj/45 vje7dc uhor 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 thisvuhejdj4 7 5/c material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He deci a9ptc2 (-vfjades to modify the filament. How should the filament of a lightbulb be moda(c92 j-apvftified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same9*qo,r nm7vnj ej 7v77in.xj m material. The length and radius of each resistorjr,77*mi9v vn .nejojmn7 qx7 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 batter1 k(w6gy5 9eksctg v*vy 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 (e 6vggvw s9ck1ytk*5 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 h5(rp65z i ozo2k rwyv4as internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmet6 2kir(5oyp o5wzr 4vzer reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three5/ b/a ;7lsm: 3yoidqc:w-4s iufckum bulbs 1, 2, and 3 - represented as resistors i35uma-s/4:cfki mwld/uo qyc7 bs:; i n 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 thof 5k1 ;barzw yef)r 4b/rvx+(e current in all three resistors is equaf ;rv +5(z) kowr ber/1b4xfyal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit co4bm/),avpiz p/ q jhx 6,wso,imposed of 5 identiqxz6ism)w ,io p,4ap/h b vj/,cal light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the fom 8kv56z zvdo9rz9d5n llowing statements is NOT true concerning the simple circuit shown where resisz5or6 zz89dnmd95kvvtors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs9 flvw(uih .7-ou yp jswj**m. X andY are connected in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements jf 7h9-*liwvj*.omys uw(up .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 coulo,d ro3m j0goc0mbs will pass through the identified resistor in 5 seconds once the circuitm3ojdo0 ,r g0c was closed?

  00.23: If all of the resistors in the following simple circuit have ri3 4z u 9.3eq3su+vh2curbfs the s+ucs.3z 42iu9bhuqevs3 rr 3fame resistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram,y8ib +3rg,q :.moaa8u.g n l8ak, nclu the current through the 6.0 Ω resistor is 1.0 A. What is the power supp.uk3cgaqa88 +8o iyua:nmnl gbr,, l.ly voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battecbpga;jpm2ebh.v21- 0 vqq:w ry. Suppose R12vj aq pbebp: 0 1qhgvc2;-wm. 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 R3?

  99.40: Three different resistors R1, R2 ag0p ; ws0n4;vsxv ggaj1 g/ nvbpa014xndR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dis vajxg4 ;agp;x00ns/gbpv0w4 sng11 vsipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 wa10 7mc3; vlizm t.dd qd3q*xsytts and 120 volts. What is the maximum value of the current under the;xt.l3yc*mdm31s0di v 7 d qqzse conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to oprim3 ko3 1w0chw d-y3terate at 120 vo-0drit1yk3 3hmc3 ww olts?

  03.09: How much current flows through a 4 ohm resistor od)c vhy3g0r1that is dissipating 36 watts of power?y)d3 h1og r0vc

  05.21: A household iron used to press clothes is marked "120 volt,, ksc l47bno,g 600 watt.” In normal use, the cbsg, on4c7 k,lurrent in it is

  01.05: Which of the following resistances could NOT be produced by af0t 6 wn3ni5;gtpoml 4 circuit containing only thri0;4ntml6 fwntpgo5 3 ee identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalefb w /cxokz;pm*q2 omaws) 0sr(q)j 68nt resistances CANNOT be produced using all mo)wc)wbks fm860(jqzx;2 o sa *r q/pthree resistors?

  02.06: Three resistors of different values caqo xk*0xs*f 0 udal3bz 7jhy)3nk c8ms-r8p2gn be connected together in different configuratip dsr 0 8j0gm7qxluz-bkk3s*h y)c3 f*an2o8xons. 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 power P isp n)tw e/n7u6l dissipated in the cp n7n /)etlu6wircuit. 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 resi qv7 k2jybb2(ystance R1 and R2, are connected in parallel, the equivalenkyby(b 7qjv 22t resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such h(-utiq)7b bcnienv q) m)./vthat it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that qu)qvn.hii /-vnb(m)ce 7 bt)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 4o,tvgzv8*ksq o 24z+ l ohm resistor that is dissipating 36 watts of po*g +kz8vq4s 2zlo o,vtwer?

  01.24: An electric heater nx(3 z +jd/vxn6uk(ub draws 13 amperes of current when connected to 120 volts. If the price of electricity i+ dubz/xxn6j(kv 3 n(us $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately h3recwrit3zx * l.,es6ow much would it cost to keep a 100W lightbulb lit continuously rerx*cl3wti.e ,zs36 for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current .j e8+ci n- 7m-gdvlypof 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lip78-jd c.li-mvney+ g ghtbulb?

  01.10: Each member old:hd) h:2eu mf a family of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a sing:dl2h:hum d e)le circuit 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 fj12 k nkf,k*ev/pg 5crorm a simple circuit as shown to the right. v*5kpe fg2kn,1rckj/
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 to form acl64 e305sx 1yxna5wobzf o *a simple circuit as6e lo5n5fwy* bcaa103 4 zxsxo shown 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 resistors are coc o mc(-8c64nl14 zke0gbb+ja*nyqh lnnected as shown. With the switch open as shown in the diagram the ammeter reads 2.06lbcl*+n j4k bg y40-e 1aozmq8n h(cc 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 and three robg z:iq6y e9i-(jzs**cu4x qesistors are connected as shown. With the switch open as shown in the di: 69*i -b 4ozc(qxgy suq*jeizagram 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 idmx /suy j6k2l.eal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.s j/.mkl2x y6u0 amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the righs r.qyufpr) 05t, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance Rusp)0 yrr. 5qf.

  09.07: The equivalent resistas;.4k* zfelr9.bkdxk nce of the circuit shown to the right with resi be .k.;xlkrk9sd *4fzstances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows yjd 14-0 q l5a,exqmez7aty1wfive identical resistors connected in a combination series and parallel circuit to a voltage source. z,q t1 1y5aj0wqeyead 7ml4- x
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fivet vfno.gy:l4 2 identical resistors connected in a combination seriesgn:t y flvo4.2 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 thwra ho woe,+e 1ute (:h,q,cpbl0y2w+ e bulbs are identical. Which bulb will be the brighteso+w,b hl(er2 0u pwohyc1 :e,wa,qt+ et?

  02.21: An ideal battery, an ideal ammeter, a switch10/abul p* zzn and three resistors are connected as shown. With the switch open as shown in the diagramu anpzb/ 0z1l* 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 *3n8vv.kn egp switch and three resistors are connected as shown. With the switch open as sne3.nv *gpvk8 hown 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 idea,wn r b.68wmd5 k kt7gk8ljk2yl ammeter, a switch and three resistors are connected as shown. Wiwm 8 l62ngtk5,8wbj.d rk kky7th 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?