16.09: In the circuit shown, an aa2 :k z8 ztm5f20sx 5ede8qitelectric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through5 tsi08:2 q2t5mzaezkdfa8 ex the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connecscelob-xiyi 4 6 vx;/4ted in parallel, the_________each resistor is the;i/i4yocv-xe l64sx b same.

  06.33: A current through the thin filament wire of a lightbulb causes the filzk4 fuxnh5q/0whmf nt f+7z 55ament to b5ffnmfh74 wx 0zhn5+u/5tz kq ecome white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard heku 363 zwyedi83e9fm1 cdbyc.)r,bkousehold lights are being replaced with LEDs. LED is the acronym fori ,dde1k9f e3wub3y8c6e.crz3 kb )my which one of the following choices?

  05.16: A cylindrical graphite resistor has length L;fj ct-.q +q2kp*g. byf-wov i 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 t ygqiwp+q. 2; * ffo--bk.cjvnew resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the samev vbt pl3vkgrgwdb:v :0zq/ 1 q.cef1p)272uo material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II 2gvvv t bupoqr:w.1kl2 /7qe g:czpf 3b 10v)dhas resistance

  99.31: Wire Y is made( aafykl(o *x9f d(:cs of the same 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 resisfxdf*9l oaa y(:(sc (ktance of

  03.23: A cylindrical resistor has v a2+dq1n fzezxeb3 q304pyn 0length L and radius r. This piece of material is then d0d+eb3z qne 04 yz3pafq1xnv 2rawn 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 i-;loarnh g5 ou-.3;liinv d3;cc( smwants to make a brighter light bulb. He decides to modify the filame3oinm-;csc ru3l-h dlng 5;ai .ov;i(nt. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are matrhzw32 :bma0fe9l 7gde of the same material. The length and radius of each resi3b92 le7wrzfg:amth0 stor 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 connhw*baj d q4w/(u(-z t,bx wz-kected to a battery in the following way: “Two resiw(d /kuh,a qz(4*x zwbwb-t- jstors 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 equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanyingx,;7dyh*03sc n2 0ogx1l zyd6 uvzznr circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter realx dsn2yd gz0z 6ozuxh;c1r,v3y 0*n 7ding is most nearly:

  97.37: Consider the compound circuit shown to the right. T+ ); ola7ihvqehe three bulbs 1, 2, and 3 - represented as resisto )vo7 +e;qahlirs 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 electra;n6ub .sf/b sical circuit at the right. If the current in all three n 6ssub;/fba. resistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed ofk83xil(z jm 7j 5 identical light bulbs and 2 flashlight cells. Which b iz8mj3kj(7 xlulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning h,3;(un55i7 h rk.mrwkj oz wvthe simple circuit shown where resistors R1, R2 5z rmw j3ikn5wu(vh7k ro;,.hand R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is( v :flxxxvf0q6h qw224gazc 5 brighter than bulb Y. Assume all circuit elemenh22x vw6(:f5a0fqgl zcx 4qv xts 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 will pass through the identified resistor ifbb3w n.4i zjubf4 :hxrm2 v.gh.+*nwn 5 seconds once the cibbixh nv4fg mnr:uz bw.f4. h*2.wj3+rcuit was closed?

  00.23: If all of the resistors * 7h;-r o+yspqmg2)4u,arq qm qzlx2x in the following simple circuit have the same resistance,om*-yrqx pm4qq2lqz;,ur2 7ag) + xsh which would dissipate the greatest power?

  98.34: In the accompanying circuitxm7e j:cwac*4 diagram, the current through the 6.0 Ω resistoremcx 7 *:jwc4a is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors yzsa 2 zdfad(ifhj09 gzz6+.0R1, R2, and 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 o 6yz 0dij2saza0 9d(+gzfzh f.f power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in paral7rep2jsa9vu vq 2(8 gslel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, an v(vpur22egas7 9jqs8 d R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What isp,1/f6yirithv z4 o *o the maximum value of the curren /6tv1o oipy*z ih4f,rt under these conditions?

  99.23: What is the resistance of a 60 watt lighsjue) s;7:x0 okpoaa.tbulb designed to operate at 120 vos0.ap u;s:)o jokaxe7 lts?

  03.09: How much current flows through a 4 q w04r( gjq(oyohm resistor that is dissipating 36 watts of po (j yq(rqwgo04wer?

  05.21: A household iron used to press clothes is marke7c r6tiv f o84qozk..*f) phnsd "120 volt, 600 watt.” In normal use, the current in )h.n 8otq4irkzspo f *f 7v.6cit is

  01.05: Which of the following repw.-mw f 2sau5,v9-f gydskb) sistances could NOT be produced by a circuit containingf9p5uymsgwdw -) a s 2,.bfk-v only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Whic/ z fy 8basn6qq lv5r6dy)/u(rh of the following equivalent resistances CANNOT be produced using all th66asq yb/z8 u v/)nfrydrq(5l ree resistors?

  02.06: Three resistors of different values can be connected togethes): 5oq1fdw6 3btxy2gvfw 1fr r in different configurations. If all three resistors are used in a circuit, how many different values offq5b1 fw1drf3 sy o26vtg:wx) total resistance can be produced?

  97.35: When a single resistor is cocunl1 7t b*u7g* l-fyonnected to a battery, a total power P is dissipated in the circuit. How much total power is diss*c u1ut7 f oyb*7nl-glipated 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, havinnuqo*ebdi-n si./ )x+o qz i(9g resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statemeno9xb uidn -z/)*+n qoei(.siqts about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ωjn5gn3(nd z *b when operating at 120 volts. What is the minimum amount of time that it would take to * nnngd bj53z(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 is disvss5q 7mydki0g4sk qi*lo ua/;b5)l0sipating 36 watts of poweblm4qs i/akdu; ksisl)o v50* 5yq70gr?

  01.24: An electric heater draws 13 amperes of current when connected tan5o 0ilu /jg4o 120 volts. If the pricean4lo0i /ug5j of electricity 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 tdeg zfo4/ ;upu- ql8: mzwy:n5o keep a 100W lightbulb lit continuously for 1 year at ad:e -:y4no;fgzpzq w um8lu5/ rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results iu4m y-f(j owa.wkg/ 4fn a power of 24.0 W associatedu./w 4 jfagoy4(- fkmw 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 0y e0zw gb;sgnj +lk.6at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fusee6jzygwl.;s +n 00bk g, 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 ths*. r-,olj qto form a simple circuit as shown to the rightts .oq-r lh,*j.
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 fo,e+tkbsv6li / rm a simple circuit as shown to the rigt6+ve/,i bsklht.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, an yqtx dpg:oz7 f :q;/4bideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in/df;ytz 7 :gxq pq:o4b 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 resistors are edc*-)l 4b bmwhpih .9connected as shown. With the switch open as shown in the d*)emb-hpwlih4cd . 9 biagram 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 idexm f/ g,cxqf14al ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes/41mxx ,fqc fg.
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 rm //fqevat, .kesistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identicalta.eqkf m, v// resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with lxtj.c-lqa*mi* 0n+ o resista a+qi* o.lcn-l mjt0x*nces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below showss(njor:d 7;th five identical resistors connected in a combination series and p ;ontrh :sd7j(arallel 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 amh((plo -fnoc 9g -:fh combination series and parallel circuit to a voloh: -f(f ocgl9hmp(n -tage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identicb( a d/tril4k1oec .v9al. Which bulo9iv(.4a crbet1/kldb will be the brightest?

  02.21: An ideal battery, an ideal ) lva9p0y pw3zammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.pwzy0p a9v3 l)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 resistors are cou+dnbzyeev ;:vv6l)- 7nzq a 5nnected as shown.:-zz uv56b)veen;l 7 q+vanyd 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 switch and three resist 99s a31t)8ofdh1v ddii dq*efors are connected as shown. With th*q9 fs )11d hdv8otae9f3ddii e 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?