16.09: In the circuit shown, an electric cury txj c4voo/z*0b4 lw:rent exists in the metal resistor connected to the battery. Which one of the 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 0v:cbxoz t*wl/ 4jo4y?

  98.06: When any four resistorsct2/5o(pk9pj sng4jz are connected in parallel, the_________each resistor kcg(z52jt49 p s jpn/ois the same.

  06.33: A current through the thin filamkryx9x oiry6-4, y:brc c+p)n ent wire of a lightbulb causes the filament to become white hot, while the larger wires connoy xyi crrn,6ckyrxp :)+-49 bected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are r )lg+ sjncc6 81imr, mvf/4vfbeing replaced with LEDs. LED is the acronym for which one of the follogs4,m1 fl6cr)rcvj 8/ m+nvifwing choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area A.75wa+ cnxjj2 lbd6(ca It is to be placed into a circuit, but it first 6 ca+l xwbnj75(2ac djmust 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 cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has t*qy 7qp u7glcpx .8mci :5lb3cwice the diameter and twice the length of I. If I has resistance R, II c7c8 g:ilx.mcbq73 5lu yqp*p has resistance

  99.31: Wire Y is made of the same material but hthg(xxsbv jy 1b)z8a;c2;h/p as twice the diameter and half the length of wire X. If wire X has 8yxtpa jghhbsx2)c1 ( b;z;v/a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resist6jf mrcpd+q;g6ny d2d 8)sq-qor 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 resj;yp68q)gf qsrd nc m2+-qdd6istance of this material because of this process?

  07.27: A junior Thomas Ediso1a1o nec(p -* wd*h:qm:jjtcrn wants to make a brighter light bulb. He decides to modify the filament. How should the filament of a l-*njwd c:tqjro(a *hm1:1 ecpightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the n.m dwtd:1gz-same material. The length and radius of each1.-d mz :dwgtn 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 bata6ah0 ucu2qnv li;j 2,tery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in l,v h0aqn2ac2u ji;6 uparallel 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 d-sp8cy8e 1x 7gza*qimiagram has internal resistance 10.0 kW and the m-g8cae*i8pz 1q7 sx yammeter 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 bw18ku7-. tgktk d, akrulbs 1, 2, and 3 - represented as resistors in the diag 7a,1k8ut r.k-gdkkwt ram
- 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 theh hp8c5r.+tf m current in all three resistors is p h8+mc5frh t.equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed of 5jww q1 .t0yy w4osan4. identical light .otw1y4ws nwaj0.4yq bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statementfeviiubn7ks;e,hh1957u xex u.2bx- s is NOT true concerning the simple circuit shown where resistors R 2u exi.5 nbbi- xukfh7xh,su19ee7;v1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a bxcqn-.f b 2g-fattery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connec2qbn. cfxf -g-ted 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 :4jcp.ejngi5 v v 00usidentified resistor in 5 seconds once the circuit was clpisejcv 0 0jv.4:5g nuosed?

  00.23: If all of the resistors in the following qm6q)f/ 0z)hstkzf 3fs9kjg; simple circuit have the same r6k;fm3)js9zk g0qf)s f htq /zesistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, 077r0xbos,v: w pichrthe current through the 6.0 Ω resisto 7rhpwi ,xrs00v7bc: or is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. Sup jn0hhxg6er6j0mu c,zis m25j5 hs2 q0pose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What mm0nchj0qei g 2 uh,66x 5s5r2sj0hzjis the voltage across R3?

  99.40: Three different resistor7nd ew*s/ j,hfs R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipatesw*/f7,shn jde 6 W. What is the current in R3?

  99.13: A heating coil is rated(*i;nd bi :s9 xsjaj2j 1200 watts and 120 volts. What is the maximum value of the current u(n*sb 9 xijj;si:a2d jnder these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 120b,/+k,*ybmj* fsqi h m voltskq**,b ims,bfy/mjh+ ?

  03.09: How much current flows through a 4 ohm resistl2z.d3* p p6uwiqnfi 6c3y) rtor that is dissipating 36 watts of c3pd6 rwi)2p.i zyqunl* 63tfpower?

  05.21: A household iron used to press clothes is marked "120 volt,y)tm26 y htb3h 600 watt.” In normalm t)h62yhyb t3 use, the current in it is

  01.05: Which of the following resistances could NOT krjw: 3lb hfav/jutcb*(9 7)ybe produced by a circuit containing only threev /aj* tclf: u)j(y39 hrwkbb7 identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which oe:ftl ;wo ,4uf8 9tjcgf the following equivalent resitf4 guwoj98 ft;e: c,lstances CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together ie2xa8*ya y oz(tse .w5n different eat * (28y5wzeaxyos. configurations. 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 connectedc(us1t -wa7 bq+y) pux to a battery, 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 xspcqua1tb+7y) wu(- 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 t k vy0 geef,;06syxn+connected in parallel, the equivalent resistance of the combination is 5Ω . ty0e+n;0,v gefxs yk6 Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when o2wsj ftps7)khffx ae0k: 2-q 3perating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg of water frofa3f ts w22e: xpk- hkjq70)sfm $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissi3jt33ifyq /v1sq8 le jpating 36 watts3qtv1/ej j3i lq3yfs 8 of power?

  01.24: An electric heater draws 13 amperes of current when connected to4vyqqjjwi bgd 8v8va +,,xj*( r qop58 120 voltsw pr48qqo, y8,vjdbj*5jvg va 8qi+(x. If the price 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 to keep a 100W lightbrv m89cy nnl,0ulb lit continuously for cynl98v ,m0rn1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in 5df 09y6q *vseyhakdmgh35-j b6xqm 72eljp 5a power of 24.0 W associated with the bulb. Which one of the following choicesems93*valy j ybedqd gpk6q 5hfmj-55670 2 hx best represents the resistance of the lightbulb?

  01.10: Each member of a fa1zk upe8pf)z( h(-g/d ad*khnmily of six owns a computer rated at 500 watts in a 120 V circuit. If allzzpah /-g(1phukfnek*( d)d8 computers 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 si(z l0jn4 2kpugmple circuit as shown to the right. g kjpz42uln0(
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 todknp s*.n4z- a four resistors to form a simple circuit as shop .zd4kn*na s-wn 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 ideayt wr h+1c(ch4 g 2f+.3u;h 3mjrgcbcql ammeter, a switch and three resistors are connected as shown. Wit yw cr+th .cbgg3u+;m(qcf1r4 hch23 jh 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 threhx:d3+gp8wepy* sol +e resistors are connected as shown. With the switch open as shown in gl+xsyeo hd3:wp8*p+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, ane7uz .zj 6*vlm ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter readsz lez *jvmu67. 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 tbx37v sl5+ o9 ch57mypkx9q nequivalent resistance? Assume that all wires are ideas oy nhxvl t739mk+qx 759cbp5l, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of8fnnszcthlrvz j9i73 9b,(w 0 the circuit shown to the right with resi8t0zcijh3fn(7rs9w vlb9 ,nz stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five idenedg n 8l*8bdidan.c0* no;s)stical resistors connected in a combination series and parallel circuit t n.d8bs 80o)esa gnil**cd;dno a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resisto8lxg/ zl8 wq0dat e8v8rs connected in a combination series and parallg q 8ltdv8x0l/8aezw8 el circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of4 wpai+mx t:;l the bulbs are identical. Which bulb will be ax+mlpi t:4;wthe brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors a /;vbg nea5*s ayte*n ;eww6n:re connews wy n*gv e:5t*e/;n6 ae;nbacted as 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 resistors are cg jx.m.pbxz k80+adey;ak( 6donnected as shown. With the switch open as shown in the diagram yeg .mxdjzpd (60ba+8 a;kkx.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;k ugxku2gzuv0; (gcu;.(ip xwitch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter 0gkgvu (.u ucxk;;i2g;zx (up reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?