16.09: In the circuit shown, an electric current exists in the metal resistor cvv s ubbn/qryp- f3;)+3eo rf5onnected 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 int-;nb )rs3ry bfof /e3+vp5vquerior of the resistor?

  98.06: When any four resistors are connected in parallel, the_________eac8rg. xuj (ofk74kdr62k3ag8 3mbgmx uh resistor is thu27dx3 jf (6m8rka.kgukoxr 3g84m bge same.

  06.33: A current through the td))fcax;5j jqanl4e/ hin filament wire of a lightbulb causes the filament to become white hot, while the larger wirescj;enql ad) 4)j/5 xaf connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced wtxyt e1(9ugnf 0e/: zwith LEDs. LED is the acronym for which one of the following choices?9f0tn: ezg( ty1u/wx e

  05.16: A cylindrical graphite resistor has length L anly 1h /nvsc(pd* (*tc5qtg.t vd 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 new res5 cp1 d(y.*vhc*ttv ntqgs(/listivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has twice theu1k/i u)dl tg(-mkg f7f s+k-q diameter and twice the length of I. If I has resistance R, II has r qk1mk)i gt uk(fl u+s-f7-gd/esistance

  99.31: Wire Y is made of the same material but has twice the atx+md:z/rp(1t m1 8 kh4 ywgsdiameter and half the length of wire X. If wire X has a rwptm +xs48gd/z1hk(:1a y rt mesistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radiusyrdm b,(0v/(xrah wq,:ep/x johv:e( r. This piece of material is then drawn so :r(/ ( bo,vjawhr x vme0ey(pd/q h:x,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 mj m8it+k9u xg tz5 6iq98gmgu7ake a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to mxutikugm6 i+5j z7 9tg8g m89qake the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resisto/ ( fqf4ajbfr/-3lmt((l qmxors are made of the same material. The length and radius of each resistt( /3-(q /fllf4x( mrfobjmqaor 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 resio.)wa t-s t)cnstance 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.” What is the equivalent resistance of this arran)waonst.-ct) gement of four resistors?

  95.35: The voltmeter in the accompkxnfcbf8ezf: 1; /9; zj bu(lhyi2nh5anying 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 vol5hhf/yn;zf ebfnl :9 xzk;2 b8(iu c1jtmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The thrhtaou*tl/ls/vuz(/0 0e x e .uee bulbs 1, 2, and 3 - repr0eluutv ou atsl0hz(x/. *e//esented 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 at the right. If the curqpx.71uva aruqm ;5wz7 ql46orent in all three resistors is equal, which of the following statements mustu7a 5rxqlm1aowq6pz. ;47vq u be true?

  99.37: The diagram at rightp nyhnh6is .;+ represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cesi ny.phh ;6n+lls. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning ,h3m f ldjvc53the simple circuit shown where resisj ,d5vhlcfm33 tors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X ir. zfvuy 8y(c4ivj 6x,s brighter than bulb Y. .u46i 8r,vf(yzjxy vc 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 v88ubb7.nh j+wljji wh() mj, identified resistor in 5 seconds onchujhj7)limb 8wj8bv,j .+wn (e the circuit was closed?

  00.23: If all of the resistors in the following simple circuit have hihn3y). illg6d oaf* j,0f3othe sa.gioifd3hjh yl) 6,al f3on 0*me resistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6mct jcm, 8 u98oks w/av9bwp;(.0 Ω resistor is 1.0 A. What is the power supply voltc pwv8m; cuj9tmb,sw( 9o8k /aage V?

  97.27: Three resistors R1, R2, and R3 are connected in series tog sz5r5/(5l-e rae8qb v gjr4y a battery. Suppose R1 carries a current of 2.0 A, R2 has a r 4 r5z/58grv5ea(ry lgsjbeq-esistance 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 in parallel to a blqx c*t+co.y l;ha6 d2attery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is thecd .*q26lyal+ot ;hxc current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is (ocu9 s x3ox2dgl .7wpthe maximum value of the csuc2d7p ol3 (xo.9 gwxurrent under these conditions?

  99.23: What is the rn(skwy.: i u.oufn*0pesistance of a 60 watt lightbulb designed to operate at 120 volts wn.f*un o :p0iksuy(.?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 svyxmu7k3y+0 watts of power?0sxv +73yy muk

  05.21: A household iron used to /n d2po2br*t *jtnh9 cpress clothes is marked "120 volt, 600 watt.” In normal use, the cu* 9tcn*n2rhdo/tj 2 pbrrent in it is

  01.05: Which of the following resistances could NOT be prodhuj /dnx 4**3f-t84lh . smzb;nklqthuced by a circuit containing only three identica-b44 h*/fj* zhtdt ;x8lhuqms.3nnl k l 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which6jcwa3d38wx3sub, 8t gvlz;v / 9qttb of the following equivalent resistzv98x t86 3, db3sgj3qluct;wbaw v /tances CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together in differewwsxw veakq*w 44w8 ,.mxc81lv iomxu:0-6yd nt configurw84 0wamcoyi,xx k1 vxuwm8e4ls6vd- :w.wq* ations. 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 connected tlnpxkndp(8 ,s 1g-2 43stkj emo 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 series using the same battery? Assume the e4 tld8ks1- g3np2jm(k,spnx internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, ake08mma +l0o8ubzb,x ; tar)are connected in parallel, the equivalent resistance of the combination is 5Ω . Which x,bm kaa08auot8 ; blzrme)+0of the following statements about the resistances is correct?

  02.46: A hotplate is designed sk ibq sg,wl65/ds/6ynj4 2sn+seps(q uch that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of ti5,ns42(bg +ylq wpi 6/ qssn se/s6jdkme 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 a 4 ohm resistor that is dissipating 36 wayd+ 4b2j wwyxz:flrlp8n *6h2tts of pwlj 42rx yzd26 fw*l8n: ypbh+ower?

  01.24: An electric heater draws 13sr 9/aji5 qbq5 amperes of current when connected to 120 volts. If the bs jq955qa/i rprice 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 c72;s +sdab ayhost to keep a 100W lightbulb lit continuously fd ;s+aabs7h y2or 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results ind.whp mf +(*r3iu*am7hhj8f h a power of 24.0 W associated with the bulb. Which one of the following choices * i3+ur. hhh(fmpfd8ma*hjw 7best represents the resistance of the lightbulb?

  01.10: Each member of a family of s e-8 cc;8kcmluix owns 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 c8ckm eucl-8;the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resisy9un eb ks(in(w-xl//t kn1/wtors to form a simple circuit as (nt//u/i1xesnk y(knw l-b9wshown 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 yv1obr-1l +f/a ftityb1b. q+four resistors to form a simple circuit as shown to the right. b.iyotb+1+/1tf1l qv a-ybrf
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 resistorw yr2idq w f09a8iq7z-v 89lkbx. 1kwes are connected as shown. With the swif8q 8q 7ibk109.dz9 eirv- alxwkw 2ywtch 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, anud. :p/ ; 9bqpcu4hmbo wf1fbb-y i,9m ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.bbu4y;mf m.bo fi1hc-b/p99wq p:u ,d0 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 resisxe 59vv: lw gfyrq2vj w/u4,f(tors are connected as shown. With the switch open as shown in the diagr5j gwyffx/eq4u 9lv,(2vrw :vam 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 t u 70zjktn(u.oy5:mj+ratn*b he equivalent resistance? Assume that all wires are ideal, the battery.j:0jn7 ua tkymt5ozun (+*br has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right r*nq xu+( iikr6)fx6uwith resiu k(+xfnix*qri6u6)rstances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors c n+ jyo:,s48hc8eun hponnected in a combination sern+uoph:yjs8 8nc4, e hies and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fizt(0 c1bps :gove identical resistors connected in a combination series and parallel g(s 1z0cpobt:circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all ouwgmcn1fg g r2ln n p4 -w)8msp2x*8-pf the bulbs are identical. Which bulb will be t-l8*sf-xc8 pm 1up2rwnn2w mpgng4g) he brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are co(eue+e xlc 3+x5h eioc+e;)bunnecteuhee3 (o5ce e;)b+i l+xcue+ xd 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 thr2 f5y2xwn)u9*/p3af j - jwdxxk .isjxee resistors are connected as shown. With the swit jw xj/*x-aiw2n.fusj pfxy9 k)x52d3ch 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 resistors are connh y . ol))9s.+qds*kzl5sri xwected as shown. With the switch open as shown in the diagram the ammeter rears*.h)q.s5xkd + wo izsy)9llds 2.0 amperes.
When the switch is closed, what would be the current in the circuit?