16.09: In the circuit shown, an electric current exists in the metal resistor co(mwx :vy4z bq*nnected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the direction oy: *bqx(mz4v wf the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallg)- vvinm l.8nel, the_________each resistor is the sa.glv nn v)-im8me.

  06.33: A current through the thin filament wire of a light3sw5s56yno k-m iyy)fbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain muy wsf3mo5y)s5nky- i6ch cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is thl2ts:bx1 9kb;s) ktfae acronym for which one of the follfk: sa1bs)k9t ;x 2tblowing choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area,:joxeoy6 3nu A. It is to be placed into a circuit, but it first must be cut in: ,j6no3xeu yo 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. Wir 6uph ri*l2ww0e II has twice the diameter and0 rhw26pilu* w twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same materi7eh6xjzm3khzw 1o y+t tb;y ;;al 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 res zy+;yo t1hwe3 6bxm ;hzt;j7kistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of matercing;nc. i 5r/a:v;2 ro7pp ocial is then drawn so that it is a cylinde;nvg cp72c i pinor5.;c/:orar with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison want tvfs;zp/ys/+ s to make a brighter light bulb. He decides to modify the filament. How should the filameys+ vfzs//p t;nt of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resisto4im .n /cly hkdmy+,m8rs are made of the same material. The length and radiun+mim yl,m4h ./yc kd8s 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, are connected to a battery 1+ (uvwf ;lj;nkh*-m.0bi/olz mo ox rin the following way: “Two resistors are connected in series. Thisb xz.w*+ -(;0kj urhloofv1m;moin/ l 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 equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has interna *+zk3x4vs2wh tbg,aq6p*hg a l resistance 10.0 kW and the ammeter has internal re+a,46wpbk* sag h xhqv2*tgz 3sistance 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. Thev g fnxv1,8l9iq ofu3 5ytdn6) three bulbs 1, 2, and 3 f8 1t)3 n 6gd,ynovf u59viqxl- 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 circuit at t6i;ro wi )xvy/he right. If the current in all three resistors is equal, which of thw6vri );xoi/ye following statements must be true?

  99.37: The diagram at right represents a oias : k ,rth5,fi uq38zllqm4zq.+5osimple electric circuit composed of 5 identical light bulbs and 8t4 z kq5 :h zloloqq+f3,rsu.m5iai,2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT h;ro* gw*)g4b30 heq qqrp xo/true concerning the simple circuit g0)g/x3 opo*rh;wbqqe rq*h4 shown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series gz- lxg k(cla/) b1y,nxyu(;bto a battery. Bulb X is brighter than bulb Y. Assume all circuit elementklyn(-bxx ,g c)a gbyz(1ul; /s 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 coulo0u3,; s3cgf.vqf:eo+fa j xsk .(h jnfmbs will pass through the identified resistor in 5 seco fs 3qkefxj3v,af (js.;gf+ uo:c0. nhnds once the circuit was closed?

  00.23: If all of the resistors in the following simplcjysd+v0v 88j hv5t- le circuit have the same resistance, which would dissipate the greatest power?80vysj d5vc -jvlt8 h+

  98.34: In the accompanying circuit diagram, the current el2dh4-zrk rd38d4yfm ;on, g through the 6.0 Ω resistor is 1.0 A. What is the power supply voltaordzl g ;y3d8n4d,-rm fhe2 k4ge V?

  97.27: Three resistors R1, R2, and R3 are connected in serigp5qau.q,+l6d pq)l +m 5 bxepes to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0lx u5)mb,lqap6egp+qq+dp 5. W of power. What is the voltage across R3?

  99.40: Three different resistoiy ;:cwfhaq37 x:wd) xrs R1, R2 andR3 are connected in parallel to a battery. Suppose R1 )y:7dc;aqhf3x x :ww ihas 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 wattrkvqd/( - rc/j**nh9tjmse x,s and 120 volts. What is the maximum value of the current under these condi hs et*,/dkj*mj-(xrvc9nq/rtions?

  99.23: What is the resisa. b0hrf j)z)i 1,iyjgtance of a 60 watt lightbulb designed to operate at 120 )yi1zjjbi rh.fg,a) 0volts?

  03.09: How much currcbno0h)-0+xr1wy q*pyxoh 5tebtw 2 9ent flows through a 4 ohm resistor that is dissipating 36 watts of5px ht1crxw ywqt h2+ bo)0- on*y0e9b power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 h(. dhv(/utfvwatt.” In normal use.(/ dh(tfvuhv, the current in it is

  01.05: Which of the following resistances could NOT be produced by myx;v .g3mrjs i (axw78 )s+t qbfvi;0a circuit containing only three iden)ba+g;xqtvvri yjs0x i mm38w(sf ;7. tical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors.o3l:68 wzl;ekqxr e i1 ;,cpyx Which of the following equivalent resistances CANNOT be produced using all three resistexyk1qe o; l;w i,63xrl 8cp:zors?

  02.06: Three resistors of different values can be connected togetj;yj4+m i, hwhgkqx7* her in different conf q imxjygw*jh;7k h4+,igurations. 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 powffoy iu69*(gder 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 batterifoy(u9*6 d gfy? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having rfc + .wfot30kkesistance R1 and R2, are connected in parallel, the equivcfk 30 f.+otkwalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed suc)uy4hk jx rdt d4 6.v6/z0bnlgh that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of tirhyx6jldbv4 6udk.) z/ g40tn me 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 threbu979e.b c sq3o)z fg2tw7dc ough a 4 ohm resistor that is dissipating 36 watts of 7 q.97dgstuzewbfe9c3 )c2 obpower?

  01.24: An electric he z2xrzrwxs*-ei7 d w7+ater draws 13 amperes of current when connected to 120 volts. If the price zd rw2isx *r7 7z+e-xwof electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately howp(kn,yfum5zlb 8ah)5 much would it cost to keep a 100W lightbulb lit continuously for 1 year at a ratefnmk(5aluhz8 b), p y5 of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb resuu s,ue/ .-oa 90joudyjlts in a power of 24.0 W associated with the bulb. Which one of the following choices best represents . jdu-9y uoos/ja0eu, the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 50i*md:xp . -f9eu d2(r8sh fgpc0 watts in a 120 V circuit. If all comx c rs: dp29 gp8*fu.mf-(diehputers are plugged into a single 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 form a simple circ5mez j-iwo a8h /m eu)+c,w i6sns2d.auit as shown to t-muin+ he 5c8 d ao2s)e.a6wjiw,m /zshe 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 )qaemxb-pxn 1qxa:3 1four resistors to form a simple circuit as shown to t3 qbxxax-m qen1:a)1 phe 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 threehcp r ;x7bayd6i1k+,p resistors are connected as shown. With the switch open as shown in the diagram the axppi 6 bd1 rkh+cy;7,ammeter reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery2of it*zz ;wa/67w0zomq5 l5d ovse,e, an ideal ammeter, a switch and three resistors are connected as shown. With the sw mealsz072 tq/i 5o z5*;zwwfvoedo6, itch 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 resjx0ws v 3emo-:oce52 swx 3:h6bjin5 nistors are connected as shown. With the switch open as 3niv 5ww360 ojbx hee- nc:omsx5sj2: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 the right, what is the equivalent resistaens)r;i( o5m lnce? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical(emis; )ron5 l resistance R.

  09.07: The equivalent resistance qy 9of94o gd yp osy9o0nxjnqt4):3m)of the circuit shown to the right with resista xonof4dq9tqn9yjy3)p9o s) go 4 y0:mnces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical ,rtnzasmm +/-resistors connected in a combination series and+,r mz asn/m-t parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combimr(edlfmd3223 or*nud9)tgxnation series and parallel circurl392 mdnu dx*g2mtf er) 3(odit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit q+ qf uu.2g00kb0pu amdiagram, all of the bulbs are identical. Which bul u2u kq0bg+0uaf.pmq0 b will be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and tsu24s uhnd.yvg pp*jsm:-;.zhree resistors are connected as p4 u-m.2y ;v ns g*dp.hsszuj:shown. With the 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 and three resr+ -uywl wskc ja6uk1e63/p/histors are connected as shown. With the switch open as shown in the d /a+sw/l6 yc1pwjhe u -k36urkiagram 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 andb* cwm6e2mx t1 three resistors are connected as shown. With twmbm1c26t e *xhe 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?