16.09: In the circuit shown, an electric curr5wh7) ww)/oq yia(q ofent 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 o)a7/hoyw qw5f()o qwif the resistor?

  98.06: When any four resistors are connected in parallel, the_________eaci6x6 s8os-icqh resistor is xq6o ci6-iss8 the same.

  06.33: A current through the thin filament wire of a lightbulb causes the fiqsg4.wxl(mn 1q :t+ vxlameqtw( .:nq 4vxxsm+ l1gnt to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being rek5vq(1 jjqr m4placed with LEDs. LED is the acronymjmq1vj 5(4k rq for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-secq4aoihsci;jcz-( 0gs0q; a0u v99h djc h( w2ztional 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 zjuj;s0h20 odqw ;c- savh9i(c i90c(zhgq4a 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. Wirep 20vn a1(pqbb9yjgy) II has twice the diameter and twice the length of I. If I has resista)y1q0 (9 bpg bn2pyjavnce R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter andxwomp lh 1(:.d half the length of wire X. If wire X has a .l1m(p: x ohdwresistance of R then wire Y would have a resistance of

  03.23: A cylindrical r wdsec5q(o*u:)1p mm desistor 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 resistance of this material because of this prw mc (dmp:e5 s1dq*ou)ocess?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He dececxg.-1 fjxj(hte9 ,oides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given 9g fj-e (1jc,.thexx ovoltage?

  16.07: Three cylindrical resistors are made of the samox vy8hyq9b kw -pa 6j0wnn-1)e material. The length and radius of each resisto) jyyxwn-8pa1 h-60ovk9qnw b r 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 r+ 4c,2r)zx7djsi)ey x9ieoa1azpj)tesistance R, are connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is t)s xeaojip7zr ydx)+ei41)2cja z9, 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 t7 ns7pgu d 3q50m7eayzhe accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter73dn70m5 7uga yep qzs reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bu)v* x 4r*dwosde6lxr* lbs 1, 2, and 3 - representedxlrdro* wd6*4 x*s)ve 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 civf+xdoocy43b7,kmn/ rcuit at the right. If the current in all three resistors is equal, which of the following statementsv o 3odmf+nk7/,y4bx c must be true?

  99.37: The diagram at right represents a simple electric circuit comptw* u(3zjzg m8 cwxpthr23 4v:osed of 5 identical light bulbs and 2 flashlight cells. Wrw t3h (zp 2vgmxuw3:j8tc4*z hich bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements i ckq39:i6caxc s NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have eqix c:9ak6ccq 3ual resistances?

  17.29: Two lightbulbs X andY are connectb:-beoe:)qddxw,*u 6 99tmsee hs3eced 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 choicee w9sxe:m,u 93h)b:stbqo e* -ecdd 6es best represents what is observed?

  06.34: How many coulombs will pass through the identified)jq.(olg hnhyz )s,3a resistor in 5 seconds once the ja,()yzqh h3g n .s)ol circuit was closed?

  00.23: If all of the resistors in m0euf z. mi18kthe following simple circuit have the same resistance, which would dissipate the greates m0 zu1k8mief.t power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ωk6-a ez3rfe.mbx a ((o resistor is 1.0 A. What is the power ex(b ra f6omaz.3- (kesupply voltage V?

  97.27: Three resistors R1, R2, and R3 are con xv0x (7mn*s5oo b+*/ 0f,8zm1ovclusyly tfvnected in series to a battery. Suppose R1 carries a current of 2.0 Am0xl vy,y 5vv u 0ozcflt81/s(*ofno bxs+m7 *, 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 conn0 t4t4w b)fnqiected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current inn44qibft w 0)t R3?

  99.13: A heating coil is rated 120tzoq;qgu. 7 p(0 watts and 120 volts. What is the maximum value of the current unde; q7g .(uotqzpr these conditions?

  99.23: What is the resistance of a 60 watt lightbulb desigz w3bm32z(3 2dkk(bwxgzd )okned to operate at 120 volts?2kw(gkbb 3dd mzzk(32 zxw 3o)

  03.09: How much current flows through a 4 ohm resistor that is dissip,zs+ e*/k0ktthof 7w3bnrzx ;a3 cn v)ating 36 watts of powk/wx r7vt f3 ;,acznto3 e* s0kzbn+h)er?

  05.21: A household iron used to press cl )5rx(qc,qy j*j6ktg iothes is marked "120 volt, 600 watt.” In normal use, the current5 k) qjtigr*xcj ,yq(6 in it is

  01.05: Which of the followingonmk j:jg+0 24hxpbs 7 resistances could NOT be produced by a circuit containing only three identical 6Ωjb4:j s+n kxg2 0pho7m resistors?

  94.37: You are given three 1.0 Ω resistors. Which ofpcn r6 pm+-txfe46j- -maa*ir the following equivalent resistances CANNOT be produced using all three resistorip6*r +mjpcr emax-a- f64-nts?

  02.06: Three resistors of different values can be connected together infr.nh5b0 d* rk7tlryso 8.e0 o different configurations. If ..o8ydk nbesrrft0 5o*rl 70h 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 to a batteryg+zq ;th, l*as, a total power P is dissipated in the circuit. How much total;+ slaz*,hqtg 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 resistan0v)nd)lxy8 rf ce R1 and R2, are connected in parallel, the equivalent resistancexfn8ry) ) 0ldv of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 1 c /1ojuu07n8ez xit8v2Ω when operating at 120 volts. What is the minimum amount ooct1u/x0 n z vi87u8jef 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 a 4 ohm resistor that is dissipat1)eppbgd7g)l/ q tic6 ing 36 watts of)igp6/bt e )1lpdcg 7q power?

  01.24: An electric heater draws 13 amperes of current g k6(pg0p.pwu when connected to 120 volts. If the price of e6g0(. u wgppkplectricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much wouldct9 w:sv c;q*u it cost to keep a 100W lightbulb lit continuously for 1 yeast:vqu; 9 ccw*r at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightz8ij .b+,yp;c x+ekyq bulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the rex 8j+,p+yy.i ;e bqczksistance of the lightbulb?

  01.10: Each member of a family of six owns a computer ratede (i4c /xgdvg31 rxpz5 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 compute(xgdeg43v c5zp/ xri1 rs can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple cix6l*geznn l. 3e1q4f0q1xq)cxsqrg5rcuit as shown toe x )*0nlrs3.c1xlz4 xq1 egnq6qqgf5 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 resistor9c1dnq800: mf tvodris to form a simple circuit as shown to the rq0m 9tdo 1idfn:0r 8vcight.
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 52ju(u-sc ekvr6p4ojare connected as shown. With the switch open as shown in the diagram the ammeter read6(urc52uo4ekjpsj v - s 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal batter*0oonswo5a*wi7gb j+y, an 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 57 wsgnawo+0ibj *oo*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 resis0 g 2od dimu.goj;a-)utors are connected as shou o;doj).d0i g2u-agmwn. With the 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 wlz+q 0/i7ltho7 ob,ishown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance+77q,0 bizo/ihltwl o R.

  09.07: The equivalent resistance of the circuit )x: rc)s gvll 607i-u o5kakl+9fmz fkshown to the right with res: m u0xcfl sfgl7kv 6kr+-9)ozkli )5aistances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identicalb-d.ct 1, mrwn resistors connected in a combination series and parallel circuid m1c, rbn.w-tt to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a commmd0f7y 8x.e dy1(-e vn0m;vdifszh 6bination series and parallv8.00 (6fvmmi7sn eh x-dezy 1dm;fdy 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 identical. Which bul8+lp6 uchm5g0lqdy;j b willc pl6q d058uyml+ghj; be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors arercq h9 0mumougr)n4poxc*: -- connected as shown. With the switch open as shown in the diagram the ammetp:r9c4-)ur-oom g *n0q cxmh uer 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 thsunduq nr)24tuwky4q; tm *j d(/:td.ree resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 a/dqjnytwu*.utq()dtu s2: k;m n4r4 dmperes.
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 vcr.u3y h:9/ qik*+ 5y/arq/t tsxaf fresistors are connected as shown. With the switch open as shown in tr tf q5k/x9//tcaqu f s3+r hayv.:iy*he diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?