16.09: In the circuit shown, an elecjeepa)c )7( 41n8 gic+gqpnfstric current exists in the metal resistor connected to the battery. Whpefq84)p n 1(j sicc+geg7na)ich 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 are connect w jixt,jl3. e1,*rxc8mqua3g ed in parallel, the_________each resistor is max jgil,jq,3 8tc*e.uw3rx1 the same.

  06.33: A current through the thin filament wire of a lightbulb causes thc76p o,9lo;k no1 fxoxgkrb). e filament toc,r)g.b pkoo961n7xoo lk f; x 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 replaced with LED itm01ob(5 u5eh2e ffcb-*mrxee)la.s. LED is the acronym for which one of the following choices? - rf*mflehc(a e0x bbet2o.umi55e)1

  05.16: A cylindrical graphite resistor has length L and cross-u hed40a id50jsectional 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 cylindrical riud0a 40jhd5 eesistor?

  98.20: Wire I and wire II are made of the same material. Wirzez-h *vgw -u :iy.b+he II has twice the diameter and twice the length evu :igyhzb-hz-*+ .wof I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the 5y,; nt.)s-vsjmbdisslq f 2+ same material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a s.n5d2q ;sjliv+t y)- fm,sbsresistance of

  03.23: A cylindrical resistor has length L and radiuso8e oyp7p ,2po r. This piece of material is then drawn so that it is a cylindopo2p7p ey 8,oer 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 buli-2r/ 2ku +invee+:kxadcc3hb. He decides to modi u2hk rc23+ie-/kdivac:+nxe fy the filament. 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 made of the same material. The lengthopas6kc(+zm dj 87rs+ and radius of each re87d sr +mk6(z s+jocpasistor 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 the tmak,)msz4 9(ss7 w+jzd. buc following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel 7smbjsc)9. ztzw,sk( +mu4 adto 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 accompanying circuit diagram has internal r1a tfra- 0rt5sesistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The 5f-srta1a 0tr voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the rig -8p:t/atntjt -vdx8g nupc61 jxc l+4ht. The three bulbs 1, 2, and 3 - re8 8cj:a1jc- 6gnvttux /+- l dp4xnttppresented 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 lca (w8jnb( uvhl:7u l3: jk4uat the right. If the current in all three resistors is equal, which of the following statements uj 4lu nwch j(l3l7:b (8:vaukmust be true?

  99.37: The diagram at right represents a simple electric circuit cosq4ue /fxq-+t/kgtf 3p d )hz6mposed of 5 identical light bulbs and 2 flashlight cells. Which b+ f-34guk/sxp)eq6ztq /hd t fulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning thed05h6l -pt st9mc(n bh simple circuit shown where resistors R1, R2 and R3 are have equal resis-m5hplt6d 0( shb9c tntances?

  17.29: Two lightbulbs Xbl8d9)y;z+cw)dq y 8kmr,f xr andY are connected 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 ch;lqd9y xzm dkrrwcy,) )+8b8foices best represents what is observed?

  06.34: How many coulombs will pass through the identifiezt d6j ,fat.5ed resistor in 5 seconds once the circuit wa tfeaz5.t6j,d s closed?

  00.23: If all of the resistors in the following simple i.zar s.41(jh, jygv ocircuit have the same resistance, whic1r syo v.(jj gih4,az.h would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω 9azro iw4r+ h5p3-mu e resistor is 1.0 A. Wh- uw i3zmre4r+5aop9h at is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in serie :xj ,sbxoc z5qm:es51s to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates1z, sex ::o5qbcjsmx 5 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallep 8b:ey-q6 vx 7tpsz5crcv2:pl to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates cyzrv-pp5 :6 c8s2:pb7q vtxe6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts andfg20q ; yyt*; s naj3cx0scoer49nwd4 120 volts. What is the maximum va0e3odc;gqcya2 ynx40t9 ;rsnj4fw *slue of the current under these conditions?

  99.23: What is the resistance onez ,yxwv6fi6iy17f+ f a 60 watt lightbulb designed to operate at 120 nfx1i+e vy zy,66 fiw7volts?

  03.09: How much current flows through u*bn,pkv3 k8 gjt 8*yza 4 ohm resistor that is dissipating 36 wau88b3y k kz ntjv**g,ptts of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.”i gh /f:3ma5hl In normal use, tg5lah f3mi/: hhe current in it is

  01.05: Which of the following resistances could NOT be produced by a k3csi8+zfi epwa66n gf,b n/yu74wy6circuit containing only three identical 6Ω reine c7if6snu+ 38/w f64akpbygw6 , zysistors?

  94.37: You are given three 1.05gvjcv 67p*cd Ω resistors. Which of the following equivalent resist5 cjv*p 6gvc7dances CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together ik* *sjkw95mhr9 rvtu.s9w 1wfn different configurations. If all three resistors are used in a circuit, how manyf m w.w*j9u5ksw s99r *tkhv1r different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a total power P is (z bs4gfm0wv. ghs;-x 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 resistancm4(vb ; .sh0x- fgwgzse of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are cuow(jyy :suru xz)72,2yk1 v uonnected in parallel, the equivalent resistance of the combination is uu1 sy:w7yzj uu,v22(y )k xor5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω whenrgft 7 ttqo /7ccplh8)+n x0u9 operating at 120 volts. What is the minimum amount of time that it would take to wr n foc08t xt)c+t9ul7 /7gpqharm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm reh+az- lohi0 v;5.2j cn, zmy* l3ufdpisistor that is dissipating 36 watts0mc uyp,il-ovnzh3djz a if5hl. ; +*2 of power?

  01.24: An electric h . ekxyc,o5c-meater draws 13 amperes of current when connected to 120 volts. If the pri.5,cyx- kmec oce 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 lightbulbbj,9utz8 13v leae6civ)hm8x lit continuously for 1 yeaj 3a 6vuv1mecx,8eb zti8l h9)r at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results inec( 1s oeeq8:5 j)xhjz a power of 24.0 W associated with the bulb. Which one of the following (5qox:h cz e1jjese)8choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six ownhwj s ,c4*(iews 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 the maximum number of the computers can be operating at the sametim, csjh*ew w4(ie?

  03.16: A 9-volt battery is connected to four resistors to form a simplyevbz; 7)p5qii+nc+ x)pb b/re circuit as ;pec vr57+b pnq)xy/b+)bizi shown 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 fouizrt (in1z,( 79pbnckr resistors to form a simple circuit as91 c n(,tpb7z nzrkii( shown to the 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 an2d50 qhvpm8r p wcpmnbgj .661d three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2j051pphmdnqrm28g 6pwb.vc 6.0 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 s kqepu;5 wu j6k).g fgc0;zlk8witch and three resistors are connected as shown. With the switch open as 0;gwl kfue ;)cq5.k 6gjpukz8 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 threvk0 s -hr,qix6e resistors are connected as shown. With the switch open as shown in the diagram the a6vqi0sk hrx- ,mmeter 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 equdd0/ o , b/cw4y-:jvd2lgab bfivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all threagdl jdb0v/ /-cf4d, ob: y2bwe resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with r,k jjgu+7oau3esiajug+ oj,uk73 stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below sh1zys d.k-i ri-d+w 8ikows five identical resistors connected in a combination series ani diy.d- 8ks 1+w-zrikd parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fivj) qj+oaqt5u.ue*i,mui8f y5 e identical resistors connected in a combination series and parallel circuit to o, ij.e8qyf) m+ua* iuqut55j a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbv2rn;;twg 7m cs are identical. Which bulb wil2rwg7;ctv ; mnl be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and t lxsfl d5m6n/;qyhu ./hree resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0q;yd5mu6fl/ n/s.lx h amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battcva,yx c961q2d j /gtqery, an ideal ammeter, a switch and three resistors are connected as shown. With thgqty,2 6aj1 q/cvx 9dce 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 switch and three resistors w4r2prb p ;a3jrs*j(aare connected as shown. With the switch open as shown in the diagram the jp 3s(2jbap4wr a;*rrammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?