16.09: In the circuit shown, an electric current exis a1)p69j x 4io kr)bkoxml;bjh0zqh110 9yi bmts in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistori1z oma qhy bkbj9lk)0r1ph4;xio0m) b91xj6 and the direction of the electric field through the interior of the resistor?

  98.06: When any four j:nfpwwl+ zw5o2+iw8*vk q+i resistors are connected in parallel, the_________each resistor ik++o fwzwj5wn:i2 w+8pvq l*is the same.

  06.33: A current through the thlu)0jdgf :,cyin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happc) fd0: y,ljugens because

  13.08: Some standard household lights are being r9xkaq,f4 dif/ ve.2rh eplaced with LEDs. LED is the acronym for which one of the following chx92, fqa /rd4vkf hei.oices?

  05.16: A cylindrical graphite resir(7u a*hd agx/ 3q;khs8m iq5zz2ft ;ystor has length L and cross-sectional area A. It is to be placed into a circuit, but it first mh 25 uri 3szymgfkt*7d/xah;;a(zq8qust 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 resistor?

  98.20: Wire I and wire II are made of thhe,k a4ujsj:s p7x 6* 6mnvk0ke same material. Wire II has twice the diameter and twice the length ofam0se:k *k, u6 4jkh6j7nvxps I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the )se1a9ib-ma 1jadgh;u i.2vukic+i42 ;c uaxdiameter and half the length of wire X. If wire X has a resistance of R .-u21acuvi)j s9 adi xka 4+ h1a;ibeg;mc2ui then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radiwu s0az-r9pc4(z4v.cxxhfy 2 us r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the( u-x c .0zxzcaryw2 s449fhvp resistance of this material because of this process?

  07.27: A junior Thomas Edison wantsz*zr/ cmi gps.xzl6i s:+19q ih;b1tx 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 c;1itlmp+1iizb*.:x sgqr s/z6zh9x lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistxsx6bl 5rmjq3+t(:i6v-n gjhors are made of the same material. The length and radius of each resistom6jj vgl(x53 qx-ti6 rhb+s: nr 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 batt fg;7: ozfdr.dery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in r;dfzo:7d f.gparallel 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 t 2zz.qfegz( d4he accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal r4. 2 dzeqzg(fzesistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shows)4t 8o pm mj7g)ukwv6(na- aon to the right. The three bulbs 1, 2, and 3 - represented as resistors in thak(sj4up ) 8)omn6tw a7g-o mve 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 electricp2zl,f 2 xmro;al circuit at the right. If the current in all three resistors is equal, which of the following statemel r ;z,po22xmfnts must be true?

  99.37: The diagram at right represents a simple elec:xwqpln+)nh9. s/ywa tric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bu .qn:9nxl/)w+ ahp sywlb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements - sdi xytb0-c7is NOT true concerning the simple circuit shown ybt7 0sc-xi d-where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a batt;*z6v9ffwb to *atfnnp/t( a 5ery. 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 choices best represents what is observed? bz 5;fat/6*ft* vowfn p9ant(

  06.34: How many coulombs will pass through the identified resistor h6 2eignibw :5 in 5 seconds once the cbih : ei5wn26gircuit was closed?

  00.23: If all of the resistors in the following simple circuit h6ukvib) (rog u.d;2zhzwx/ c (ave the same resistazkwu.h br)(; x6vd(z g/2cuionce, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω remszfw 1v9d *(aqe:3qzsistor is 1.0 A. What is the power supply mda:fzv1*s3 (qe9zwqvoltage V?

  97.27: Three resistors R1, R2, and R3 are connected i +j+1totlt+)iig4tg.ez. *+ g pqumsjn series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, ag m+ .+ie+tgs uoj 1gzp il4.t*qtjt)+nd R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected m; lp51btypl7in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the cutpll7 15m yp;brrent in R3?

  99.13: A heating coil is rated 1200 watts and 120 vol/sqq) ni/802 (hiujfldeaqb;ic)4z ets. What is the maximum val)n0b isuh a4(j /qz/;2lfqd q8e)ciei ue of the current under these conditions?

  99.23: What is the resistance of a 60 wattkn 9ht kvz q/f0m)5u;p lightbulb designed to operate at 120 9v5/ kquz; pn)0tfmhkvolts?

  03.09: How much current flows through a 4 ohm resistor th97enn,aj tu 0qat is dissipating 36 wat, tuq7jann90e ts of power?

  05.21: A household iron used to press clothes is marked "120 volt,pvduc,ud pi3f1b 9mwsi. d2.7 600 watt.” In normal use, the current in iddibiu pwcpusd2v m93,f 7..1 t is

  01.05: Which of the fo:9tw m,c0f j2tl:0nv xbl z5plllowing resistances could NOT be produced by a circuit containing only three identc b 5mt0xw,pl0vll2 nzf::tj 9ical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of th wmr)(8;k --hbsyans re following equivalent resistanc8w- bhkm)-ry; r(snsa es CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can-kz..l. lzo tvw(v/jf be connected together in different configurations. If all thrtvzjz-..(fllo wv./ k ee resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor/tz hapaq b*qv)y6g y:8d.5uk. la qb9ohd 78b 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 i7k bh:uztob )qap 86vdhbd9y/l.5 qgq.*8aayn series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resi vv,/ck9rwg c- aur2o3stors, having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following sta oc,3k /v2ruv w9rg-catements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistancq3h /3wjq: hfke of 12Ω when operating at 120 volts. What is the:jhq/h kwq 33f 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 th 50i68yw0tjokxb ilggck8x( 6rough a 4 ohm resistor that is dissipating 36 wattk(lg g05j8xbx oy 8k6t0i6icws of power?

  01.24: An electric heater draws -ij- jj)mcv/g13 amperes of current when connected to 120 volts. If the price of electricity isij mc j-gvj/)- $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 keenok/o+ 2cst il.j *9tep a 100W lightbulb lit continuously /t2n elko t*cj+ .o9sifor 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbv3:kvun ux p)l4l(h ,rulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistanceh)nl(3:p kru4 lvx,vu of the lightbulb?

  01.10: Each member of a family+kkp41+ . roby ytn5 -zrz,mnm 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 numbezno .-15pntk+z,m b4mr ryky+r of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple circutlqe s(-v+- ptit as shown to thse qp-+tl(-tve 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 re kl-1up :nf)bz2 qm2udsistors to form a simple circuit as shok:mz2n2dfpqu - l)b1uwn 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 c6f9yojl*r7yj 83on5u)-qm u3tbn da are connected as shown. With the switch open as shown in the diagram the ammet5uoqn3 td * 97j fju6cmyo8ayn3brl-) er 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 z5mttgz02z8 civ a v-3three resistors are connected as shown. With the switch open as shown in the diagram the ammeter rm8c- vg zt3a 05tzviz2eads 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 swil e9f5 :) bz6s ;-.v2gixkpway6jkdbstch and three resistors are connected as shown. With thewy6bv:z9x2-sei6bs )5fagl p.jk;k d 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 l11)ge56eoy ep0 dt )j*jep isi w5/qf shown to the right, what is the equivalent resistance? Assume that all espegd w55o y11f)*6)0jplje/qetii wires are 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 right spla2 aar:nf(: n.p l8with resal8 (sfn. :lpa2r:anp istances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connebcu:8+uaixe + 5goc)p/t ;ie r8ylp x9cted in a combination series and parallel circuit to a vobic8;y+e5pg xu ex98:curtl )pi +a/oltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistor4/ ;-au thhs3f5twb bss connected in a combination series and parall-u5thfbw /3s thbs4a;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 identi(vw +bzh(nm0ncal. Which bulb will be the briznmn(0(w vhb +ghtest?

  02.21: An ideal battery, anlwrk)89 ,hvz y ideal ammeter, a switch and three resistors are connected as shown. With the w)yk9hl ,rv8z switch open 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, a switch and three resistors are couz (xiv9,ql a5nnected as shown. Waz59v ,xq(u ilith 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 switchgk91zbkpbqit*s.4o4s32 i2u gzz2 av and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter re2ib.pzs tq kb v2412gkua zsoi 93g4*zads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?