16.09: In the circuit shown, an electric current exists in the metal resistor xbjna o)4hn52tvf-kqc, k u/0connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the d4x50n,ahqb ) n2kuvft -/cjokirection of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_____dnuva )co7ytj4+(,hu____each resist4vdycjou(antu7 , )+ hor is the same.

  06.33: A current through the thin filament wire of a lightbulb 9ak o(pug8rp h1k v//ujx z*o6causes the filament to become white hot, while the larger wires connected to the loug r//k hvap8z6(x*oj1kup9ightbulb remain much cooler. This happens because

  13.08: Some standard houzbn7sfyqh+n )l fbr8 q9 p,+c0sehold lights are being replaced with LEDs. LED is the az)bp0y+7nr ff qb9nsq c+lh8,cronym for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional u3(j7xp7 i0moexi 0ff area A. It is to be placed into a circuit, but it first must be cut in half 7i3 emjo0puxxi f(7f0so 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 g24yori:p, nd same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has resisn,py :gid42o rtance

  99.31: Wire Y is made of the same material but has twice the dip e75fsd4w-sl c/dh c*ameter and half the lengt- c/w*dfhs csle47dp5 h of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resi0t8 nmrg6d dt/zh hc;dp;o6 ;nstor has length L and radius r. This piece of material inpd/tt g0 o;mhc;8;6r6hdndz s 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 make a brighter light bulb. He decidf23 ar*1.p ejx pbb*zdes to modify the filament. How should the filament of a lightbulb be modified in order to make theebf zpx1 32r**pb .jda lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the samlh5.a(3y aso ye material. The length and r.3oa s(yla5y hadius 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 re74w, xhpzwsx f05ed)z sistance R, are connected to a battery in the following way: “Two resistors are connected in 7xe5fw)h0xz dzs4,pwseries. 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 a5 4gmf .1svqpfd4)ar tccompanying 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 most nearr4gf5.qvtm 4 dafps1)ly:

  97.37: Consider the compound circuit shown to the right. The three bulbs+llckc(n t,46 d jlzrt8)0chaei;8 ye 1, 2, and 3 - represented as resistors in h zci; e, kc4adnel8c(ytl8+ j0t r6)lthe 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 en94toaohv lyk *9 q/(electrical circuit at the right. If the current in all three resistors is equa 4(9ql*ono kh9eaty/vl, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit d,c h3eh-*ox4(zsfmb composed of 5 identical light bulbs and 24hxh,(* 3 seozfb cmd- flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the folm d5eko4. y*vk ) 4lne-i1ihoolowing statements is NOT true concerning the simple circuit shown where resistors R1, 1 h4 od4i-me5nvo.o*kkiyl) eR2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a bawr;tjmu(r u21 bd86el ttery. Bulb X is brighter 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 choictl8we( mj;2 6du1rrubes best represents what is observed?

  06.34: How many co ns .ns2jl.0jg+grdm74j g3ovq,i c0vulombs will pass through the identified resistor in 5 seconds once the circuit was closln+,g2 3gj.sjvijgcd v.7 00nom rsq4ed?

  00.23: If all of the resistors in the following ivco)b2w)7tmdy6v ur:mswi1 ,,uxl 2simple circuit have the same resista2m,2o 1vc :w,i)dybtmuvwusix)l7r 6 nce, which would dissipate the greatest power?

  98.34: In the accompanying u jp kzpm yh0g557i,:wcircuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is i5,jyz wgkpm75 uph :0the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connm + wiu8/to5z 7yv3wi-xi zwu.0va)njected in series to a battery. Suppose R1 carries a owvj wx08umv)3/t+y z uia.i-57wzincurrent 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 differen58 kcri,awn*.w:iajc t resistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, Rcrickw,5.jw *n ia :8a2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 vol4dp4,qzl a:auq.-x c6:h owlwts. What is the maximum value6u 4hz4q:apd.wlc a :loq,wx- of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate hjrwq 8ovtsr 4 pd6a+1ly l0(0at 120 volhqrt 0jl+1s aoy (0v8pdr4 6lwts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 3hxl34a:b l) cxf 3t4dw6 watts of power?l )wd xbl4xfta3c4:h3

  05.21: A household iron used to press clothes isaz ), mth0eud. marked "120 volt, 600 watt.” In normal use, the current in it,metuahd. z 0) is

  01.05: Which of the following resistances co; rgaplbyq*kv4pays;;x -m t o9zt.q/1.e oc)uld NOT be produced by a circuit containing only three identical 6Ω resqo g ;t4e-svo1mr/ )qxyz9ck a;b tp;y*a.p.l istors?

  94.37: You are given three 1.0 Ω resistors. Whi ko/ 54usu+6sgmkj(guch of the following equivalent resistances CANNOT be produced usk6+/g oumjug(4ksu s 5ing all three resistors?

  02.06: Three resistors of different values can be connected toge4yzn*q-xx1t8hmmy 6p, *tyzs ther in different configurtynm6-ytxh,*ymz z 4 spq1* x8ations. 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 connectew ahh(gvb fr5:v3p4t5rlkf 91d to a battery, a total power P is dissipated in the r 5tv:fvb53 l(k9grh 1apw4f hcircuit. 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,gne )gtxwb2r lo7. j )9z-jg bo-o;bw* having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination -b tjeojo)gozb2xw ng )9b;g*r7w- .lis 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed suc;h6geb x 0f5cox5 bdwio2 .ei9h that 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 09o; we.65hgob2 iidx5xbe cfkg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is,d(*fxt0a8f:)s jgrc dyag xya (5i5q dissipating 36 watts of power?yfjdf( 5)ayg8,t:g a0qix* r5cdax( s

  01.24: An electric heater draws 13 amperes of 0 zg,hz6+ u(2mshwxe ecurrent when connected to 120 volt h sexh 0ge+62(zu,zwms. 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 contn9 (fz eo-fmj*inuous f 9mjo*znef-(ly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb r7ggp.shn o1podf,.h-b1l wgy 2v26 qgesults in a power of 24.0 W associated with the bulb. Which one of the following choices best 72swqhdh v-2 g6glgog. pn1f bo,.1pyrepresents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated j6mmcp;he ,xvzf/+ f loel76+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 the maximum number of the computers can be operating at the sametime?m ;h 6jef z+/7+xco,mell pv6f

  03.16: A 9-volt battery is connected to four resistoj1 d/vp m:0o3f-crro. yb2pm brs to form a simple circuit as shown to thed-o vr:p yr2/j .p31cmfbm bo0 right.
How would the current through the 2 ohm resistor compare to the current through the 4 ohm resistor?

  03.17: A 9-volt battlqhtna4c-7,d -q-d(fk 7acma. j ,bnl ga/r x:ery is connected to four resistors to form a simple circuit as shobq-7c(a7jcmq ,-,4nlklx naaa g/h - .r:dftdwn to the right.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battervx-uivhf. r:n u ax6ok.c .*s7y, an ideal ammeter, a switch and three resistors are connected as shown. Wnas o7 vxufr.k:-h.*cu6. ivxith 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,2wo do8mi 3lp7 an ideal ammeter, a switch and three resistors are connected as shown. With th7m8o 3 ipo2ldwe 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+80gddob-mn 8d/nutog+h 8pf switch and three resistors are connected as shown. With thu8o8 g tpghn d0m+dob8fn/ +d-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?

  12.14: For the circuit shown to the right, what is the equivalent resist +hrbinxhq:d f:c4x66ance? Assume that all wires are ideal, the battery has no internal resistance, and all threc:d :64xnh6hrxb iqf+e resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit,wtd spx au:*.; 5ufku3,4z j-sj hmifwa:d,m shown to the right with resist judfs,: u uh,t*m,5fx.;ip:w z4d-m 3akj awsances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five rqywr,b63 z6yidentical resistors connected in a combinationr3 q6yy,z6r wb series and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identicle 0 4bzp:x,c-x9sartn6s; rv al resistors connected in a combination series and parallel circuit tsvx6lecbtzra: ,xr90n -4; spo a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of theehx /d)n/- oj( ns5 tmoj/wiq8 bulbs are identical. Which bulb will beje )wsno( j//d-n5ihtm/ 8q xo the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors rinnnd4c rz4kn:. rzn0ts 0 4)are connected as shown. With the switch open as shown in zn) rtnicz:04d .r4s40kn nnr 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 c7aei- nx fp9jko19g:d(fqc 5o onnected as shown. With the switch open as shown i f-7io a kg(59:ofqecd91xpnj n 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 rnx-h/i9,+m5dow tsub9q s, skesistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amqd,9ix /+nbwu59 k-ss hm,otsperes.
When the switch is closed, what would be the current in the circuit?