16.09: In the circuit shown, an electric current exists ik;my76v-io4/r xzba m n 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 i-x/a6myo; rv 7kz4mb of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel,.(:9y qnk5q ozkiu- k-6mhm fj the_________each resistor -k-zmjq nm5f.y9 k ho(:i q6ukis the same.

  06.33: A current through the thin 6m mwg dbgl5 7e+qr ;4 -yduh5yy+xkx.filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb ykd+7b + . lwd4u y6xregxh-5qm;ym5g remain much cooler. This happens because

  13.08: Some standard household lights are being / el -zn7/g:mlz1cfs3; ox/cg2 bpzm .ubhq+f replaced with LEDs. LED is the acronym for which+b2l :cug-/ m3f;7z1s qb.xen gpo/z/h lf zmc one of the following choices?

  05.16: A cylindrical graphite resistor has length L a4 .qfdordblr(k(ggk+;n1vzatx .w5 ;nd cross-sectional area A. It is to be placed into a circuit, but it first must be cut in halfgo(kkd(d+b 5q .;n rv wxrf4l.1tz;g a 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(hpm5a 6 qk7ny made of the same material. Wire II has twice the diameter ann ma7(pqy5kh6d twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the samhsgsx4ejk7 )7i k6x/zsb +;zge 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 szx)e4gkg ;/jxs7zbs7k ih 6+ resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of mat10 vl+s p3bp4xk z(ihperial is pixkz4(spv 3hb lp0+1 then drawn 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 wants to mkkuafmm.+ 7z/)xp ju/ 3lm.mqake a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified ij)/p m.+a mq3m/ mluxufkz7k.n order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors ar6b:xz /plm* *5/1n iranxv, hhn0q y(oyk;oqoe made of the same material. The length and radiu6:nkz p/y/ox 0r oo*nh1;h bvqim,( * 5lynaqxs 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+q+x,,j sv77 qkalfdy R, are connected to a battery 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 in series to a fourth resistor.” Wha q q+y,adsxfjl+k7, v7t is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internal resistanc; 6t b.b8z5qt7vs ctwc;6honce 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter readingbc7; swt8 qozn6t b;cvct5 6.h is most nearly:

  97.37: Consider the compound circuit shown to the right. The thre6 d,o d)w,p(kju duk,ce bulbs 1, 2, and 3 - represented as rcokwd u,kdu,(j6 p),desistors 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 the right. If the curr1z vb3yn9xxst );gr *iefq 2y8ent in all three resistors is equal, which of the following staxx v ;ni)b*et 3q yr82zgf9s1ytements must be true?

  99.37: The diagram at right represents a simple electrkv.8qht*sb) o v/e8cg ic circuit composed of 5 identical light bulbs and 2 f 8c/q. *oe)tvhvbk 8sglashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is532wekgky7 /5hgf-b-s, k:vf uza dbg NOT true concerning the simple circuib5ygfkakhv z k/7ugedws - g b:-f352,t shown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series o1 zazh8k c5.nto a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with each ot1hn8. okaz5 zcher 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 resistorv mf8mk zmig 8wv(.r2/ d9nx:k in 5 vdkv: mzwk8fxg/9 2(r.m nim8seconds once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit have the qu 16/y,jj r d5recdbx7+ 5s2dk3x pozsame resistance, which would dissipate tjs/ dxc7zk 5 u2r op5qj3r y+b6dexd,1he greatest power?

  98.34: In the accompanying circuit diagram, the current thfw, 6e vbru6vn(e7 *tarough the 6.0 Ω resistor is 1.0 A. What in a(, v7r wfevut66e*bs the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a bgv64uss9p0cp s )uzirzdc 16/ attery. Suppose Ru1 u6 9isrsz6c4v0ps pcdg/z)1 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 andR3 are connected 55;.fdnw rqkhwl k) ew).4kfkin parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, 5 ;f.ewqn k5)wklfh.k k)4w rdand R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 vjl+izsjt htw2l soi4e05;s++)fw6m dolts. What is the maximum value of ozh++6f+ ;t 4t5 emsl2d0s wijisjwl)the current under these conditions?

  99.23: What is the resistance of a 6;*w 5zmb39v .mhzhds y0 watt lightbulb designed to operate at 120 *.zs m95vwm hd3;hbzyvolts?

  03.09: How much current flows throug))09u,ix; z avapxxqn h a 4 ohm resistor that is dissipating 36 watts;i)uxq a p9)nxxa,0zv of power?

  05.21: A household iron used to press clothes is marke1snli-g/ 5yrey 6x-vxf89y nk d "120 volt, 600 watt.” In normal use, the-ke- ysxn9i/ yx68l1fg5 rn yv current in it is

  01.05: Which of the following ia / f ;nx*-j:p gu+lzdgz2ix-resistances could NOT be produced by a circuit containing only three ideug z-:2xi+p*gdf;xaj-zi /n lntical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. We xa*vx9) *ra9wako 8vhich of the following equivalent resistances CANNOT be produced using all three resistorsa9*v9kx)vrax e8o *aw?

  02.06: Three resistors of different values can be congs q/4.cwdb .tnected together in different configurations. If all three resistors are used in a circuwc.t. d/bg4qsit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a to agf)xe 0zbdxo 6.o4z;+ k2qf/kyy*l qtal power P is dissip 40 */eabffy6q+xqkzxygl2doo).;kz ated in the circuit. 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 resiknpon.9 aos29stance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is c9 9onak2po .nsorrect?

  02.46: A hotplate is designed such that it has a resv lx6,fvn/pvb 5njf)/*d s1 ahistance of 12Ω when operating at 120 volts. 6/5xnbvl,f/sdvnj)h f* 1pvaWhat is the minimum amount of time 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 through genmdeux i4d)7 tkf26a m*02ka 4 ohm resistor that is dissipating 36 watts ek4 mxn d2u)dte 0a7 2k*mfgi6of power?

  01.24: An electric heater draws 13 amperes of current when :bd( bq o7;aocofh )9bconnected to 120 volts.9b(do7c: ;hoqab ob )f 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 lightbulb lit:: oveq mcd.d9 continuously for 1 year at a rat:.od qc vmd9:ee of $0.10/(kW.hr) ?

  12.09: A constant current offp/pdrz 3 xi23/gpr )b 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 represen2f/p/ p3) br 3dxrzpgits the resistance of the lightbulb?

  01.10: Each member of a family of six ownsz54 rj1 smz1tn a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is s41rjmz51tzn the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is c q iut5:3yr5/b7x4y qj4dz 4fmxjd4emonnected to four resistors to form a simple circuit as showe m34qrxx 5 z 7qy:tifm4bd/jyj4du45 n 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 to four resistors to form a simple c qff6*qn5 d2bfircuit as shown to q56 d *qbnf2ffthe 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 cois(unm0yzh v..+7df,ci h:w f nnectchifs7: (ndv hz+miuwfy..,0 ed 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 amme6i)ksd p 8b+esz4yzj,e8xc 4 zter, a switch and three resistors are connected as shown. With the ,e)e6kyzc 8zjx 8+ssi4d4pbz 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 ammet c-zw5b im jq0yn3c(fzlb.,p/ er, a switch and three resistors are connected as shown. With the switch open as shown in the dw flb-5z n,( pz/.03mbyiqjcciagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuitv+y hhz9 (wz8l4wws 4r shown to the right, what is the equivalent resistance? s(9+ 4r lhzvww wh84zy Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right wix8aic..gwf,p th res8pacw.x g,i. fistances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected uhd(i4 suv 89l+1wy hjin a combination series and paral 4s9 uh1+yhuvjd(l8iwlel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connecu1omu5+0l m 44yrb gysted in a combination series and pbr1+suu45gyo lmm4y 0arallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identicalizokzx5 h1y+cw:g:ys 9c*i+n. Which bulb will be the briizz c*syhg91 :oky ncix:w++5ghtest?

  02.21: An ideal battery 3fsp sf//u/qw, an ideal ammeter, a switch and three resistors are connected as showwsf/p q/3 /usfn. 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 h5vkq) .rgsb2ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperevr sb )k2ghq.5s.
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 uwc:br:5bx)rpb 9 (bhresistors are connected as shown. With the switch open as shown in th b5xrb9u:bcp r()hw: be diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?