16.09: In the circuit shown, an electric current exists in the )gh/x mtpau),metal resistor connected to the battery. Which one of the following choices best de)) mgah u/xtp,scribes 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 fourt z++vo+omi 0v resistors are connected in parallel, the_________each resistor+ moi+ovz t+0v is the same.

  06.33: A current through the thin filament wire of a lik 2m/wixlip pime4h:p2+de1 vqkv16 8ghtbulb causes the filament to become white hot, while the larger wires connected to the li2 xvqkew6p i4m+v1:ih8 /iekmppd12lghtbulb remain much cooler. This happens because

  13.08: Some standard holgc 83;lma0n lusehold lights are being replaced with LEDs. LED is the acronym for which one of the 0 l3 na8l;cglmfollowing choices?

  05.16: A cylindrical graphite reqib5z 0b3 8t nfxc(q-slp;hb( sistor has length L and cross-sectional area A. It is to be placed into a circuit, but it first must be cut in half so that thehzlctf08b(nbp qq(b si;x-5 3 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. Wire II hak+ + ndi;hl *kmpw*p2ys twice the diai lh+ywkp;m*nk2 * pd+meter and twice the length 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 v;m ,vtis6mzbddr5 )r 88 k(hn)cyrq5half the length)5r;8 kdvm nv5rb(dsmrh) t y,68icqz of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has 6/iylrhn +4wnlength L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happen/ynr i+64lhw ns to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light boky*- )lr e7rhwhb2vky71u.f ;d2m hri3a3wiulb. He decides to modify the filament. How should the filament of a lighthe7*1u.rki3y2hvo; r ibrh2 a y 7w kl)-mw3fdbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical res1p1u s9 mb2ui*fn 99 (tnbtrkx.m;kb iistors are made of the same material. The length and radius of each92r9*1u kpb1 mnfitn k9;bmx(it ub. s 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 in/7 p((,e87f edzj ht5mls xjrk the following way: “Two resistors are connected in series. This combination e7s(,r (zf pt/l jk7 h85jemdxof 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 acciwf qjk +.: 7*ap, :vtuhqbq.tompanying 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 reading is mosk.pbwq t *qh7a:q: +uv jitf,.t nearly:

  97.37: Consider the compound circuit shown to the r7, mot h;.xoypight. The three bulbs 1, 2, and 3 - r;.ym7 ot,hoxp epresented 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 pg16g/ kb ttd4o0y1x lat the right. If the current in all three resistors is equal, which of the f/dp6xt yt1 k1g4g 0lboollowing statements must be true?

  99.37: The diagram at right represents a simple electric circuwxpxy ) /7 ya7afbfw.:u:va w(it composed of 5 identical light bulbs andva7ay:pwu :xfb) f (wa7yw/x . 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the followin tvuip3 -4tge4mpseux7 ts*, -g statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have x 43--uietu4m,v ptsg* spte 7equal resistances?

  17.29: Two lightbulbs X andY are connected in series t6i 3s 92ehoqmqg h2wdrdm1lm4i1yp.4 o a battery. Bulb X is bri4mhg4ps 93ohd y1e mrim2.li26d 1qwq ghter than bulb Y. Assume all circuit 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 will pass through the iz7ol0j ,s :(fagbb- *1lm yrridentified resistor in 5 secondsbg s:*j 7b z0lfl-1io(y,ramr once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit s ,7kfj 4ngdayva3y.e/j 70 sqhave the same resistance, which7jg7sy,d0.4kqv na jeys3f a/ would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current throughu g4g xf yjqwp ku5;-epuc8q2hc;ab*z72o8v , the 6.0 Ω resiuu gbq8; ;kf* gju5 qzpwa7e2 vo 4cypxhc,82-stor is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R 1+i(ze jowbd;2, 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 of power. What eo+iw1 z( b;djis the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in yi *1/ /lbi bi(9cruj9erp,n0miyn3kparallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, an0umb( yine9 jl iy/k3br/ic ni9*,p 1rd R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. l1soalp ggc:p+ m--1z What is the maximum value of the cur1 - zs al:c+lgp-mpgo1rent under these conditions?

  99.23: What is the resistance of a 60 watt ly)+0-nx0 qmlmlkxx (+oug:zgightbulb designed to operate at 120 voltlnu0 0xo lgzm q-+(x yk)+:gxms?

  03.09: How much current flows throught1ifv-. og/8 y1bqmjrgqxl** w6w*at a 4 ohm resistor that is dissipating 36 watts of power?v l*wwyf1t.-i ra8bt*qg 1 x*mq/o6gj

  05.21: A household iron used to press clothes is marked "120 voltiim15xwh:u:dvj+wzrc8o05 u , 600 watt.” In normal use, thez vj15uw u 5xw0o8+::cri mhid current in it is

  01.05: Which of the following resistances could NOT be produyd/wbxpnnv jq*z 0/, 8ced by a circuit containingvqzx /, bn/ jpydwn*80 only three identical 6Ω resistors?

  94.37: You are given three 1.tz/*w uyo6 jnz98d25uasl zp2 0 Ω resistors. Which of the following equivalent resistances CANNOT be produced using al*u6p o/8u 5 lw dnszzay2j2z9tl three resistors?

  02.06: Three resistors of different values can be coz.8kaig: ;6xfeqz)t0txez6mw ,; cep nnected together in different configurations. If all three resis 6etx z,6;e8)i:.x epqw0g;faz zckmttors 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 battery0ea;8o -n9k2rmligz gghu)b6vy d51 b, a total power 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 battery? al 9-e82kg5ygu6hdrbobv0z1 m);n igAssume the internal resistance of the battery is zero.

  96.16: When two resistors, having re hc4qzqyq:gpvs0;h 3 0sistance R1 and R2, are connected in parallel, the equivalent resistanceq ;c:h 4szq3gpq hy00v of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such tr )k bjy 3(kn(,aevtq1hat it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg ofj,ke1bntq)( ya 3vkr ( water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm re 38a0bfi os8+zl i4rhn5; odppsistor that is dissipating 36 watts of pp8a lon fr30i4soz58 i+;dphbower?

  01.24: An electric heater draws 13 amperes of current when connected to (ukyb2s8adz/ 120 volts. If the price of 2dya /uk(szb8 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 to ki2waa-a em-b2/phzz :eep a 100W lightbulb lit continuous-m :- hazaza2/eb wpi2ly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a power of ngmqs49 3, 3woy-co*qec7m we24.0 W associated with the bulb. Which one of the following choices best represents the resistance 9c*7eqy e qn cowmos334 m-gw,of the lightbulb?

  01.10: Each member of a family of six owns a computer r ;) ,0jm pxhruywej/8zated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20xu; ejp0 /zj h,ryw8m) 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 forul8./ ddz,ov+t n6kv sm a simple circuit as shown v/,vs+6t knlu dd8zo .to the 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 tow4k (ht fjd3n yk4ntd/hm+z/rfn33;d b +dwz) four resistors to form a simple circuit as shown to the rightdfz;k3mr3(ndf/nkh3tbd /td y+4whw z n)+j4.
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 ar,sn .oux6;)6hih/u/lcnrc gxe connected as shown. With the switch opecu6hn/6rc glixun);,/.s ohxn 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 resistors are con f3x8prgmo 5++yi vlh1nected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. +lp1mvr o83x5h+yfgi
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ep ff3hv a6lh17r-k)hideal ammeter, a switch and three resistors are connected as shown. With the ) hk3frvpl6ea1 f-hh7switch 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?

  12.14: For the circuit shown to the rightd0wkx66q6xl fx .:v un, what is the equivalent resistance? Assume that all wires are ideal, the bak l6w6vx:xn 6f. xqd0uttery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the ci: s/m5*rbo;fj mhu6 iercuit shown to the right with resistance/j eimb fm:ous65* ;rhs $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connetxzd-r3- sw1 qbp +pq.cted in a combination series and parallel circuit to a vorq+z-3 qp .spxtb d1-wltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connecte j1ui;yk tv:)8vzcx4yd in a combination series and parallel c)4k8ycuiyv j:v1 xt;z ircuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagx8ow;a; /kz 1uc k.kxnram, all of the bulbs are identical. Which bulb axkn/1xk .o;u kz8wc ;will be the brightest?

  02.21: An ideal battery)+ -:6w66wh wwlmcfp 1aiqq 6dat,vhu , an ideal ammeter, a switch and three resistors are connected as shown. With the suq hc mw):h6d1faw66 6,ti+pqal -wvwwitch 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 resistors are c,he fg r;/sv j7ahs;7vr7bjw,j1j(e d onnected as shown. With the switch open as shown in the diagram the ammetehja jbd,1g,w77e;7 f v(r j/hsjr;vser reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an idefoid6)wz/0g rh * 8lseal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amp *eg)o60szlf /wir8hderes.
When the switch is closed, what would be the current in the circuit?