16.09: In the circuit shown, an f.n1 .qxyys)relectric current exists in the metal resistor connected to the battery. Which one of the follo.sq1rx .y)nyfwing 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 parallel, the______q ajpjp0455i 0rb itt9___each resistor i4 j0qpt5aitib p0 j59rs the same.

  06.33: A current through the thin fila p zau/hg7oc l;s jm3ak,*m.r6ment wire of a lightbulb causes the filament to become white hot, while the larger wires con7m/ mapjc3 6, ruaogzk s;*hl.nected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights aress:ud8dr.hq) d/p ydup b(s0, being replaced with LEDs. LED is the acronym for dd hss u prdd,0/:)(s8 puybq.which one of the following choices?

  05.16: A cylindrical graph wstz,os**np +i )v.a +,ngbnaite resistor has length L and cross-sectional area A. It is to be placed into a circuit, but it first must b npsz,gn)o,* tsa+a b*in+w.ve 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 resistor?

  98.20: Wire I and wire II are made of the same mav9v uo7*l+su7 z amhk2fym)h 4terial. Wire II has twice the diametmafum+ y)2oh 7 lvz*us7k9vh 4er and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter and halzt8w.0 kxjd 8kf the length of wire X. If wire X has a resistance of R then wirez.wtk xjd8 k80 Y would have a resistance of

  03.23: A cylindrical resistor has lehokg3,i( a hz b0mxni* 2/whz7ngth L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happen*/xzi3,7 hkbmh( noha i0w 2zgs to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He dec,.z vk jkk,v8hides to modify the filament. How should the filament of a lightbulb be modified in order kv8,,. jkkh zvto make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same materialw *-g) s15c-gervcwrhv8swr-06sg ab . The length and radius of each resigss b-rg)v-e*-wcw0r5 v6ras h8g w1cstor 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 conne2zba-7-2ca -skrxknqh 2; oydcted to a battery in 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 resistors is connected in series to a fourth resistor.” What is the equivalent res2obsk-2a z7a k ;n-c-2drh yxqistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuitud) 0ulqk4o b- 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 i)k-q uodb0lu 4s most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 1, 2g;+bp jl:w.lm dm,bzsbqe , 02, and 3 - reprqb e .ls,m;j:gl+d0,b pmwzb2esented 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 electri3r(vs:: xzs9xo1eve s cal circuit at the right. If the current in all three resistors is equal, whicxv1s ( s3v esxe::ro9zh of the following statements must be true?

  99.37: The diagram at right reprefqg5xe 7-3 sjrhir-1asents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bulbs) -xfer1j-aqigrsh375
would you expect to be the brightest?

  00.03: Which of the following statem+/ 7jjgs)6fz aej8he ments is NOT true concerning the simple circuit shown where resistors R1, R2 anmaj zf68j jse/7eh )g+d R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a boh hy)c6 , gc2k3hhoe84ev8y zattery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parall yoh2 6c ozg 4e83he8chvhk),yel with each 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 identified resistl2:eo4 v 9np3lk ca0 r71a wvpqn5qf-hor in 5 seconds once the circuit was closq519a3 vcn o-la0lw7q: hkerpp42v fn ed?

  00.23: If all of the resistors in the following simple circuit ha f/k . fjil j9qwj27ympen*7:0hta+5j)ipspyve the sai+ 5ppw7ksfie2nh jjyq* . pj9fjt 7):l0amy/ me resistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω .dkc 2:awrn kyi01( hkr gm(m/resistor i k (hm awr01kg mkr(n:dci/y.2s 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. Suptd02 h c*/.qt 2yblsscpose R1 car0yc*h qb2s /ls2.c tdtries a 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 parallel -zm(bnu.3rfw to a battery. Suppose R1 has 2V acr. fbwnm-uz( 3ross it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 wat y;vb0s1euec2 ts and 120 volts. What is the maximum value of the cuvu;es2 c y0e1brrent under these conditions?

  99.23: What is the resistd 9(qgt q13vq*khy4 flance of a 60 watt lightbulb designed to operate at 120 voly(39hqq vq tg4*1ldfkts?

  03.09: How much current fl) quxye5j ) up42wp/oa-8fgvbows through a 4 ohm resistor that is dissipating 36 watgu) v) x pebf4u2wqo5j/8-aypts of power?

  05.21: A household i f/j.slrmw:,6w omh6 aron used to press clothes is marked "120 volt, 600 watt.” In normal us/w hl 6ras,owm:6f.mje, the current in it is

  01.05: Which of the following resistances could NOT be produced by a circuit conu v/2mnk,vw(a taining only three identical 6Ω resisto2mukn( vwa/, vrs?

  94.37: You are given three 1.0 Ω resistoa/l yb-umgv1cqywn27 vbg z/*n4m*m+ rs. Which of the following equivalent resistances CANNOT be produced using all three r7q y* m+ /g41wn/vc z-gma*bbu mnl2yvesistors?

  02.06: Three resistors of different values can be connec4,dfffp9/or j ted together in different configurations. If all three resistors are used in a circuit, how many different vajfr/ p9,ffod4 lues of total resistance can be produced?

  97.35: When a single resisto(*uq:z x* ch0//h0 mqjihn7vkjoue,k r 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 resistance of the battery is zehu ju7,nx/q/oqk 0zh *ikm0*( c j:vehro.

  96.16: When two resistors, having resistance R1 and R2, are connected kp76 )hi4f mb*b ryjx9in parallel, the equivalent resistance of the combinationirfykp * 476bjm b9x)h 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 12Ω when o0 r 9x)h. bf heipmjq24s(cpwr0uc.5nperating at 120 volts. What is the minimum amount of time that it would take to20 i5p9hn4uces. h r (jw).qfpcmr 0xb warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flow( ovx,ee5q ic.*;ce2i1js y eks through a 4 ohm resistor that is dissipating 36 watts of power(5,;ek.2e1y ecivox*ce ijq s?

  01.24: An electric heater draws 13 amperes of curreyw: r96fjhu 4int when connected to 120 volts. If the 6yjfirwu9: 4hprice 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 lightbulb lit con3vw nnz 3v1xqc)i,n h;8 4wo5bangng1tinuously for 1 yearnnn;o 34 3ga)zbv,1gh1n 8xcwq 5nwi v at a rate of $0.10/(kW.hr) ?

  12.09: A constant curre*whuvffd(r)z gbw*8 xnzde 3(;.la +h x59pt ynt of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which zf(5zndw *8( *3) rxtgfel+ 9y xb;.ahhdupvwone of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six *qm mbra rci;:o1j5) cowns 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*q1m; j: m)iro c5rbac maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected 1 u9(/rxsvq gw2xpcjfm7el48to four resistors to form a simple circuit as shp7wl m4 u9qfv(128esjgr c/xx own 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 simple circul ,f 0cu),-q jqvf0mcdit as shofl j-)vf0,m 0q d,cqcuwn 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 and three resistors a/p:28 dhy dspcre connected as shown. With the switch openpd 82p:s chyd/ as shown in the 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, /i8x i4e xd5pva switch and three resistors are connected as shown. With the switch ope4xe8pd/ i iv5xn 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 sl ojn8dh 9:y/ywitch and three resistors are connected as showno hj yy9:ln8d/. 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 shown to the right, what is the equivalent resistance?xoi7tck+7h x( Assume that all wires are ideal, the bahxx7k( c7 ot+ittery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resise(tu*3cz5b zq-wosho5( f6qp tance of the circuit shown to the right with resisq*f(5 qopsut(ow3hec 6b- z5ztances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected tl kih)c :rt/-yjwz( 4tm7s5 qmow/9sin a combination series and parallel circuit to a voltage source.wm(zj-yt5rcwq k /ti )7:smsoht/ 49l
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a combinatib md9lkim+ w jo7ee-*,on seriem,l7j i9bo-w+de ekm* s and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagra/tlsmi 8s: 0fbm, all of the bulbs are identical. Which bulb will bsbs:f t8/l im0e the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch a yarv 8nc/bebq s70c.(nd three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampecb( bye8a nc.vq0rs /7res.
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 re3t u1mbq7w.4j6fps ae sistors are connected as shown. With the switch open as shown in the diag1t4. uaj 6qfs3pmw7ebram 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 are con2qgz3u j w/4owb9y 5cmnected as shown. With the switch open as shown iqb24 gmou9jyw 5c/zw3 n the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?