16.09: In the circuit shown, an electric current exists in the metm6scs1fm /l/l czt-um . :h4fsal resistor conn: -.t /l4f6cl fmshu1smzm/csected 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?

  98.06: When any four resistors a7m9i)sujym7t/ ed qsr y6)8wbre connected in parallel, the_________each resistor is the samq)ryswued j 6/9 m 8bim)7sty7e.

  06.33: A current through the thin filament wire of a :y, cun i/b0qz+hkpq .lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much coolk,0ub:zqp/ +n .yi cqher. This happens because

  13.08: Some standard v m/qr4(e.hbthousehold lights are being replaced with LEDs. LED is the acronym for whic4 mbvq(rth./e h one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-swn8v)w 9,h:u f(dbq afectional 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 resistivity to the old resistivity of the cyli wbnau(8v,9 )f hwdqf:ndrical resistor?

  98.20: Wire I and wire II are made of the same materm-j uels41 ulzba-l06 ial. Wire II has twice the diameter and twice the length of ul a-su4ll60em-bj1 z I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same ma1j- cjid o6nm)terial but has twice the diameter and half the length of wire X. If wire X hai) 1omcj6 dj-ns a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r.l d*9cxl*l hzp-6hqn8 This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material becaun8 p xh**9h-zql6dl lcse of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decides :tu,b 98 /ymrysno s-pn-2j4zzvwu (5zm kl4s to modify the filament. How should the filament of a lightbulb be modified in order tov5b zt sy /9mrny:l(snj zu4p2,-oswu8km-z4 make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the samaz zbb3y9e :)afm4njrgs6) .g*ob k j*e material. The length and radi fob*sbnz 6. 39j )4 kz*)er:gjmybagaus 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 R, are connected to a battery in thefu7(zn6,k.(sr wigt 7eu6fa e 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 arrg7 f7ez6(a,6uns ek ruf twi.(angement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagrsxt ;bfojwvlr5 f 7h- bt8fhz2g*7++p3 qey/fam has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter readiwf f+gz8rhs -;yf /p7q37fbtx*o2t b5+vhjelng is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right.kx z(vrtj,:0e,bt, us:b*h )glp k ;ty The three bulbs 1, 2, and 3 - l(h : grb;t, zxty)vsuk0,, je*:k pbtrepresented 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 sims /tknk8e:.3j 3jbdl yple electrical circuit at the right. If the current in all three rek eydb. 8:jj3/nts3klsistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electriv2paxmis+7(k w3s4pd 8v wg q)c circuit composed of 5 identical lig(sxmwdv+)wvgqa3 7ps 2 i48pkht bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the follzsr+rbr yux+80a,rc *owing statements is NOT true concerning the simple circuit shusbcya 8zrrrr +x*,0+ own where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are c+pv l5. ;pzcerbinr -)onnected in series to 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 other to the same battery, which one of the following choices best represents wl+bi czpp-r er; )n5v.hat is observed?

  06.34: How many coulombs will pass 8-9yzt* z)nw3qws,nzbjw m 8w through the identified resistor in 5 seconds once the circuit was closed?z 3zw8mz)s9tny8*b-w qjw,wn

  00.23: If all of the resistors in the following simple circuit have etcrlwk)6vp7bq5 e1xrx p/ e(--q1gmthe same resistance, which would dissip5 vg6/( 1mrc1qp tp-rqk -)b7 elwxeexate the greatest power?

  98.34: In the accompanying circuit dbn c5x15(gpm 35bmdf piagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply vp(mxcn5 5 g3pd b1b5fmoltage V?

  97.27: Three resistors R1, R2, y 7pqlo og-5r+nii/4m 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.q o7py -5+imior4/gln What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 aa* fh)ikz +:exre connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the)exf z :hi+*ak current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What i3n +y 2eqlkjl(s the maximum value of the current undejke+y 3lqnl2(r these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to o o57uj( lfv/ xemxn 3l:8g*qxzperate at 120 voltuf/gj ox5n8v(:7lq 3emlxz x*s?

  03.09: How much current flows through a 4 ohm resistor that isa9,v; ng30he l x3zyfj dissipating 36 wa,la gv0 e9y33jfznh x;tts of power?

  05.21: A household iron used to press clot 4 6ckypv+pbi 0:nx)gghes is marked "120 volt, 600 watt.” In normayxi)0g:kg46b +pp cv nl use, the current in it is

  01.05: Which of the following resistancy,j*:ranb : bpa /ysvryi,;m3 es could NOT be produced by a circuit containing only thr/v ; *jraabbsyp3:mr,ny: i,yee identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivaliotgl 3w9yd),s0vjjbg p) cu7 8)fx4jk2 wka1ent resistanfjb c8 g1)ju4v7gaditwk093 l)sy,p 2 wxoj)k ces CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connecte)jcw q:2v:srs d together in different configurations. If all three resistors are us)s qcw: vs:j2red in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resist;ork jd3v)w6r sm*l; hh.)a4wdfh y:cor is connected 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 series using the same battery? Assume the internal resista.r)lskjo:achf);y hw4*hd63d m;wr vnce of the battery is zero.

  96.16: When two resistors, having resisu;aaz6fnh/ jt.3p .lrtance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the followinja hnzr;u.fl 6a pt/.3g statements about the resistances is correct?

  02.46: A hotplate is designed such that it ha g+wc0l t,vkk+s a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would tak vk0,g+tkl+cwe 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 k 6vj 7nih.l -r,xtlk **ftd3sdissipating 36 watts oljk*h,3s tkvt.n 7*r 6-ifdxl f power?

  01.24: An electric heater draws 13 amperes of currewi1ykam6h z::nt when connected to 120 volts. If thm1wa:zi :hy6k e 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 lig wp;ex7 tql8j7y m44jets6td2htbulb lit continuously for 1 year dp7lt4t xs4 62tje mj w8;7eyqat a rate of $0.10/(kW.hr) ?

  12.09: A constant current okf n6uul0k1b8 f 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 represents the resistance of the lighfl8u01 uknb k6tbulb?

  01.10: Each member of a family of six owns a comp; 6btpdh65ilbjl v 1y 1u3sd)i 4vjp+futer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fusl4 l;1b3vy 1 s6)p5htivdbu fjd6 i+pje, 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 ivykv 101(n6i m: mae9v n4w.yua 4jpcsimple circuit as shown wypiyam:9 av4k1n0mie4 6 .v(j1 nvucto 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 connec hv/ 14d yof(ol4t:pfpted to four resistors to form a simple circuit as sh l4f1v oy/phpd t4o:f(own to the right.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal batteb cs ml6q*ne.q:v3e, a2acm;kry, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the am:be;kv26ce3,s.nq qa acmm*lmeter 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 - j-6x( hzmn 5 u0svzusyn.1xwand three resistors are connected as shown. With the switch open as shown in the diagram the ammeter vy jmnu(x -w50s-usx.z z6nh1reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, ac*c*5c yb3 lojjhne43 n ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperesenl 4*35 cjj*hboc3cy.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the rig ;a u3yzy4b rxb2c(va5ht, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors ubcryy(x2vb z5a3a;4 have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the rig5dsis7 p9pfk6)zy z onb -oa1;ht with resisbz6s1yio)n zdk f79s;p5-aop tances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identicaa sx4xq 8/t9o-w wo5bhl resistors connected in a combination series and parallel circuit to a voltageawhxx9so4 8-tw/5b o q source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identic/uecn /mf9rgu(24 ze mal resistors connected in a combination series and parallfme/ reznm24uc 9gu/(el 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 ide-h3b( d7xsedl(-1ma( ,g:zvamdsw igntical. Which bulb will -3 zsmmd(ehl1adx(,d :wvasgg-7 (bi be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are conavjx;4+ *wjf bnected as shown. With the switch open as shown in the diagram the ama;x4 + bv*jwjfmeter 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 r ;(itczx esze aly3;49esistors are connected as shown. With the switch open as s 3ts9;4yixzelz ;(ceahown 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 batterysfd*( zg8e 3 *twri0vt, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammtg*0 *we8f di vz(t3sreter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?