16.09: In the circuit shown, an electric curre( p/ yq9ukdz+ b+4i lxpwvqq0,nt 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 fielw+x pl4d+q0qq,i9kyz p/buv( d through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the__fz 4l 0s 2qdc+r3i+qgg_______each resistoc q+402rgdsz+ ig 3flqr is the same.

  06.33: A current through the thin filament wire of a lightbulb causes the y;hki ozh.6dt.5 pva(filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens bec h;.(ihvy 6 .oktpd5azause

  13.08: Some standard household lights are being replaced with LEDs. LED is(eca g8*ps6v43dxr q xx4pyn* the acronym for which one of the following choicesqnd3s*vp xxr4xe8 ypa*64c(g?

  05.16: A cylindrical graphite resistor has lengtw6 z2ocuj* bs6h L and 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 resistivity cz6sb*2wjuo 6 to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire uij6xk/qdn3 8m* i ,vya:ii.p II are made of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance Rinv ayujipikx i:,*6d/m 3 .q8, II has resistance

  99.31: Wire Y is made of the same mat f:4mmgv )1vvzxb8g0yqt48beerial but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would haveq :vymx v1g 4f8b)e0z 8gt4vbm a resistance of

  03.23: A cylindrical resistor ha q 0e 3cdy0m:jjomb;y*s 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 thibj: y mo0dm;0eq3j* ycs process?

  07.27: A junior Thomas Edison wa. y qn;/yvx+gints to make a brighter light bulb. He decides to modify the filyxyv g;n/.q+ iament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are madefohza5,utj* + of the same material. The length and radius of eachaz+j5ou* h f,t 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 connect jtx g+f/v7jneke6re3 .p nt.ow(3n v+ed to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connecte(3t.jw+vxp/r 6ne .n 3gen7fj+to kevd 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 ;abxuhelo -is.yo,g8/l r-h,accompanying 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 nearlylhloa.xr ,8/- -; byoie u,shg:

  97.37: Consider the compound circuit shown to the righ +n45 1he,g gbvj(uwsrt. The three bulbs 1, 2, and 3 - represented as resistors in thbr+ge,nujv g wh541 (se 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 eo6snz,m +0u;hm o0d gnlectrical circuit at the right. If the current in all three resistors is equal, which of the following s,ongmud+n ;m00sz6oh tatements must be true?

  99.37: The diagram at right represents a simple eleok *mtlzlr:2w4 p8zf/kjxs-l dp8h3/ ctric circuit composed of 5 identical light bulbs and 2 flasht8fo2:-dxw*jlszr 3/p p k8kl4h m zl/light cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following stat8 zk46abk.eq aements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have e z. qab8kek64aqual resistances?

  17.29: Two lightbulbs X andY are connected in series to a battkqa3 v:fm46wxe pkh4(wh gu8z6pwn:5ery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with 4phw6mz xwe:wk a : k6gqpn3h5 f4v(u8each 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 identifijez,-:1i6st x f hoar9f8-dzted resistor in 5 seconds once the circuit was closed-e8h:o-srd jf91 f,attz zi6x ?

  00.23: If all of the resistors in the following simi. a s0xp xk56pyew;-dgmq8+rple circuit have the same resistance, which would dissipaq680gsy r ;pp. +d exia5m-kwxte the greatest power?

  98.34: In the accompanying circuit diagram, the curwrbn5ua31j* g j(vqfn8 c)bt *rent through the 6.0 Ω resistfrqga3j w5jnunc t8 bb*v*1()or is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in sy +nigv;zrd8hl/3 2, li; mq-jyjbwl*eries to a battery. Suppose R1 carries amhyd*y/,;jv z3-8l;r2g+l bi ql wjin 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 in paral ef bn+/0bn88 ut)chcklel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the cuu8 bh8kf/tne)n +cb0c rrent in R3?

  99.13: A heating coil is rateq tt1fl 3 wxlb-m91i6lu-pd ;gd 1200 watts and 120 volts. What is the maximum value of the current under these condtd1i3 gm9- f tlxl; u-b1wlq6pitions?

  99.23: What is the resistance of *p7 ersadbr;u3rd2(m a 60 watt lightbulb designed to operate at 120 vu (r r;7mbdapd3*sre 2olts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 3no6 nxkj:2)dd toke ev;1e .6e6 watts of ee tn6jko6:x .ee1d; o2kv)dnpower?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watje a4jlcsp:) pjz 9/7ht.” In normal use, the currenl:9js7h apjz) p4j /cet in it is

  01.05: Which of the following resistances could NOT be produced by a circuq4uvxlbu.) ;c:k-)2 juxg fu eit containing only three identical 6Ω rel.uv k2guu):q;cexu) x4- bfj sistors?

  94.37: You are given three 1.0 Ω resistors. Which -jyq0i. 5 x5fdy9*/ha vuer qwof the following equivalent f . /wvy x-ieqhdr 5ju5*9a0yqresistances CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be conneco3(7r/6 ctm(pa qxpa qted together in different configurations. If all three rcpxapqaor(/m7 6q(t 3esistors 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 battery, avf: a6ug16sv 7tn6q8 iq4xhw h xg0(sz 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 sam1648xh0f g7u 6 iq h(:zsqa wtvgnsx6ve battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connecte: bj4uc je4r(ie.h, zqd in parallel, the equivalent resistance of the combination is 5Ω . Wh.ejhbeqj:4u 4zcr(i ,ich of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance ofi-.bq 0eo r6a 7nx;ogt 12Ω when operating .taeriq;gx 0n7-o 6boat 120 volts. What 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 a 4 ohm resistor that is p/++wkxll)cx gf* m2wdissipating 36 watts o+/lg*+xm pl )x f2cwkwf power?

  01.24: An electric heater draws 13 ampe7rcw/ qt0ubg-res of current when connected to 120 volts. If the price of electriuqctgr/b70 w -city is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how muchz25z5su x.pja bk5hlo1)nq8d would it cost to keep a 100W lightbulb lit continuously for nad.bz kj2hu81p55)oz qsl 5x1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb result, rshk5 4gd4v1ikz rf6 mj.b-v3gb*r ss in a power of 24.0 W associated with the bulb. Which one of the following c h 3b4jikds sr6*g5-.mv,g 4brzkfvr1 hoices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts in a 1sp+ax):1fc *bilg6 g kz8 ,ta.vo qqv-20 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 operatinxal)ik -bvgv6 fsqg z*.1,q +8a:optcg at the sametime?

  03.16: A 9-volt battery is connected to four resistors to fovuj (i+ki1gia1 pec0.rm a simple circuit as shown to thea1p(g k+ juvi0 1i.iec 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 connectedmed bj3/ppw545 nuks) to four resistors to form a simple circuit as shown to t3 wksj/pnb5d pu )54mehe 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 ar8 j4.,vx vqi0gcawe- oe connected as shown. With the switch open as shown in the diagram the ammew 40c-v,oe8iva xgjq .ter reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal batteryway b7x19 smv.gd0 p5y, an ideal ammeter, a switch and three resistors are connms xy7p vwda0 b5.9g1yected as shown. With the 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 1krtn3 8jggu( nrf,r( q4*uf pammeter, a switch and three resistors are connected as shown. With the switch open as shown in t(8fq1grr( f nn*3t4,upugj k rhe 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 resistan w2klxri l3 0dm-;pt5qce? Assume that all wires are pqd0 kxm2-5ri w3lt l;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 r ticbue b),hptf l7 ,cx*p 5hqa57q-g+ight with resistances qg )fppxt e- qi,utcl5*5hc7h+7ba,b $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identiu7ah a/nvkga.pq2tx-, 6y r8c cal resistors connected in a combination series and parallel circuit to a voltage-qht2p,g7/6. a n c8avk rayxu source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical rjo 7 4m3o-drv9ain 1,jypc 466roejcq esistors connected in a combination series and parallel circuit to a volti cda1 ypooq4m6 6ejvj4c r,j37-or9nage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit ) f2pxtqgs;gcj 86e(q diagram, all of the bulbs are identical. Which bulb will b)g2qjc8;6e tx pgq(fs e the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistobwms zhx +0g, vw2(q0crs are connected as shown. With the switch open as shown in the diagram th+,0gz0xhwsqwc(vm b 2 e 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 swill, r k)a46t8*tnkbsatch and three resistors are connected as shown. With the switch open as shown in thtab, lr k*k48nl6)tase 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 and2fgniev/tav) ,wqpow x0(2p8 three resistors are connected as shown. With the switch openn2 q2 p) 8,pwwifotvgv0a x(e/ as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?