16.09: In the circuit shown, an electric current exists in the metal resisuph mwj, dx* 1j9 w5v6hg7xd.sw gf45ftor connected to the battfmvh1*ps6xww54g ujd7 9 xfwj5,hg .dery. 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 are connected in parallel9xoa56w, zste , the_________each resistor is the same oest5x6 ,w9az.

  06.33: A current through the thin filament wire of a lightbulz-4xnug7yv d vv6 s1.ub causes the filament to become white hot, while the larger wire 67vu.u-vyn xg4s1dzvs connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard hz: u8n ;zowfx.0ja( irousehold lights are being replaced with LEDs. LED is the acronym for which one of th8 z0az ;o:jxuifrn.(we following choices?

  05.16: A cylindrical graphite resis.yyeo gc ap3wu5w4r +/tor has length 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 1/2o4y3gu5 wpc y/re.w +a L. What is the 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. Wire II has twice th f0:+efff: e eij0ls3de diameter and twice the length ofjlf efsef+:e3i 0:0 df I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the samexokj (4kx(/wkz0 cr4s 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 resistance o (k xcjox44 wks0r(zk/f

  03.23: A cylindrical resistor hacas n.:4*ci t2m1xd .wjsj,ac 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 this process.adajj,c:tmcn w.4 1sx i 2c*s?

  07.27: A junior Thomas Edison wantsn w8 tneetko(ic4l;ywo y77gj7-70je to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a gk iy ; 4l yj8o(e0g7jnetn-w wct77e7oiven voltage?

  16.07: Three cylindrical resistors//fd8 0 zkpqyz teus:; are made of the same material. The length and radik/zet q/pys;u dz: f08us 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 e7 c(es2lv8ue 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 resiec27u(see8l v stors 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 accompanlcji0l uj);tlf p4.jcm9b q:9ying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.c4ji9 tl )cpmj. b: 9;ujfq0ll0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The tho5jo0lb.-ifp+gorl/olc / 3 uree bulbs 1, 2, and 3 - represented as resisrl poj-ogf ulib 30o5.o/lc/+tors 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 righ/rnlbf.smf hd r2j8+ 0t. If the current in all three resistors is equal, which of the following statememlh0s rf ./j rn8d2fb+nts must be true?

  99.37: The diagram at right represents a simple e.vy6v ohz4- ;ruhfcwii(+h (ym: o;dhlectric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which6 civuhzryo .-dv;f4io(h+m;: wh(hy bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following states8 t(fbn 04 wope1ztrt 1hum/4ments is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equanfwu otetb1z14hp8/m(4 s0 t rl resistances?

  17.29: Two lightbulbs X andY are connected in seriqz0nrqox6w; j 7 5g2+0zkrjmpes 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 thk;oqw+j0q x 07r mjg2zrzpn5 6e same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identified resi:e vmgc70p*vvfy:v0:jy j zl3/ bhm (fstor in bfh:g z/vmf: 0lvv jcj0:yp3vem *(y75 seconds once the circuit was closed?

  00.23: If all of the resistors in the following simple circu5 a ory22tkwu5it have the same resistance, which would dissipate the greatest power? wya 25to2urk5

  98.34: In the accompanying circuit diagram, the current through the 6.i(u hbi4khgalf+d8m.77fq 3 u0 Ω resistor i4f3(g.bf77ik d ah +hlquum8is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a batter/;u :vjwn.gti(v 2drqy. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 du(;it g:nrv2q/v .dwjissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel tck/jv z+t7k xy:u 3jh5o a battery. Suppose R1 has 2V across it, R2 = 4Ω, j7u +jkthv z/3ykc:5x and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil iszc k hzr59-u*j rated 1200 watts and 120 volts. What is the maximum valj-*5 9zucrk zhue of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate qiv 4)4g: ,fahn4rpl/jl0mro at 120 volts,ja:m 4i4fp0gh r/4l)o q lnvr?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36k(dkr1 2pru 8p watts (u1 rdppkkr28 of power?

  05.21: A household iron used to press clothes is marked "12+ l ) 0xtj0.lh*fbsfwpkx5 ahx;v9h+ t0 volt, 600 watt.” In normal use, the current x.hf0bal x+hkh 5 tv 0wjt;)flp *9x+sin it is

  01.05: Which of the following resistances could Nw ct:* 6djb6wc8r v6u*vuo 1pkOT be produced by a circuit containing only three identw j6:86k1cup6vd bucr** w ovtical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors sw,fhg)pa) u4gtpb7oemei 355u ;ls7 . Which of the following equivalent resistanp;g3u lothsmasfgb5w4 75)i7 ),u pee ces CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connectwl:/mk m/j n0*mf7p +(qhqkcsed together in different configurations. If all three resistors are used in a circuit, how many different valuewpkqm c* +jnk(sm7:lh0q /f m/s of total resistance can be produced?

  97.35: When a single resistor is connected to a batfr)/q0v nt hh1tery, a total power P is dissi1htqrf)0/vnh pated 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 resistance of the battery is zero.

  96.16: When two resistor8t1,nrqh ,kky s, having resistance R1 and R2, are connected in parallel, tt,81r k hnkyq,he equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such :umss:k :+76y trloij j7 +cyio0 wm1tpd*6 zbthat it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount ofib 6d:lzim:y mrs tj c1t*y6j7ok +sp 7uwo0+: 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 resistok )iz.(hpuf0 kr that is dissipating 36 wattszfpkui k0. h() of power?

  01.24: An electric heater draws 13 amperes of current when connected to 120 voltdh25zxt*pfq;i4 )dars. If the price of)dxti*;2q45r dz h paf 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 lightbulb lit con+vkrl5 jo)fk 7gul 1o5tinuously for 1 year at a rat+ll r 57kokj1vou5 )gfe of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through . mosr*f)1l mha lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices besrlo). s1mfm*ht represents the resistance of the lightbulb?

  01.10: Each member of a ffjz8.op2(t:*cm wjm.rq) on damily of six 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 the maximum number of the computers can be operating at the sametime(mjotp8rn. q mjc w). z*d:2of?

  03.16: A 9-volt battery is coa39me u1 ;a hjuh*;awonnected to four resistors to form a simple circuit as showou*u ahej3ah91 ;maw; n 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 four resistors to form a k,++io5ahwtj: r.xo f1fkbft,a;9ae simple circuit as shown to the right. aoba5keff,+h1 r;wtk.,+atfo j i:9 x
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 areba;u7;. dz j k-9svdsb connected as shown. With the switch open as shown in the diagramjkssu-7dv9z;d ab ;b. 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 switc4x-4m efcx/mqh and three resistors are connected e-qx4f/ mm4xc 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 lw:/uaz6rkh dqz g)d32 yz)a,ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter yquzgwa) zd2)z3/6 :d,lkhar 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 resistance?7d/h8 pjc(evk Assume that all wires are ideal, the battery j/p cdh7e8vk(has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resilpj82,hxc 6w zstance of the circuit shown to the right with resh 82 p6ljwcz,xistances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected iat1e5k x ox,r q:tfb*8n a combination series and ex5k1t*rt o,8:x bqfa parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows0q31 uzpra zc+ five identical resistors connected in a combination series andc0rpquaz+z3 1 parallel 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 arxv (oykagcr2 j*7*o9ve identical. Which buloy2cojv7 axv*rk(*9g b will be the brightest?

  02.21: An ideal battery, a+r .swz3v9d glvn* hl9at,gf*n ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in t h9d,* w+tlvs9zrna.3g*f glv he 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 switx(gt g1w- i 7i5z8v( 2w iqb 7ntpb7pmn7exgb9ch and three resistors are connectz(7p5b 7epg72tmn 98in(q7ggtbi1 ivw wxbx -ed 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 ammeter, a switcwf9p oi0p.0rxi(ik.5 l -vxelh and three resistors are connected as shown. With the switch open as shown in the diagram the ammep 9 ixo5likw0(fl ev0 r.p.x-iter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?