16.09: In the circuit shown, an electric current exists in the m v)hlt) vgdgv:az-3m:l oi,o4etal resistor connected to the battery. Which one of the following choices best describes the direction of a-o)hv vlv4 :) imztg :o,d3glelectron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors a.gp*j /pvu b,rikzj50 re connected in parallel, the_________each resisto /5pipr kgbj.jzu, *0vr is the same.

  06.33: A current through the thin filament wire oo5o ij+ hs.z/of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much ooj5o zhs. +i/cooler. This happens because

  13.08: Some standard household lights a (9z zzmmk8h2dqu1o)nre being replaced with LEDs. LED is the acronym for which one of the f1k )9mo2hd muq8 z(zznollowing choices?

  05.16: A cylindrical graph- tq7 ap3r2w *w2 q9a(0c+hn.vct yljte 0nctjite resistor 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 1/2 L. What is the ratio of the new r7ctte( 0l j *3.2tpvwh yqctj0 cranw+nqa- 29esistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made ofp-c y9ug 45ktlfk2 dpcay /9v i6t.kb. the same material. Wire II has twice the diameter andakpfgp4t/2 95vk.9k. ci -ycdybu t6l twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of twbw5; tt 4nvxdc7)ij8t* 1b gthe 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 wocb7x8wd41j)tb ttw i; * tnvg5uld have a resistance of

  03.23: A cylindrical resist, hu f 5xczob0*6zchc*or has length L and radius r. This piece of material is then drawn so tch6zx0*5*, fh zuc ocbhat it is a cylinder with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas E .:dpj ik dwnx ,yvw0)jcy/:m;dison wants to make a brighter light bulb. He decides to modify the filamenx)p wi0dk ;:.cv ynj djy/:,mwt. 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 resisb*mfk./tpy u 0 h/k5mxtors are made of the same material. The length and radius of each resistor is: x *ft.kk y5h/ m/0mpub
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,z8w a5zqj1t ;s each of resistance R, are connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is con 1w;sz 8q5jtzanected 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 accompam)fcm2n 9.v q7bi 7rp+ zbcdx7nying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter readinqcm.bdxb+p )cn9r77 7 zv ifm2g is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit sk m--jxl6z/o8eb qd d1hown to the right. The three bulbs 1, 2, and 3 - r-jbdx8k6 /omq e1-zldepresented 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 at the right. If the curr;dfwc9u z2na 1ent in all three resistors is equal, wh z2awf;u91n cdich of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit coz49u .qoe q5c:+qbv(dk gg,nz mposed of 5 identical light bulbs and 2 flashlight cells. .nqq( ,zk5ze uocbvd:qg+ g94Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT trues9 2mjelxfjzx *6 i.szo(m3 x7 concerning the simple circuit shown wheo*f9mx3m. ijl(z s2x s7jz6exre resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connec,ntoe/tmc x:(ted 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 pa:,t(ocen/x t mrallel with each other to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs gzz7b,lt wd0*p ;xv 3fwill pass through the identified resistor in 5 secondft*b0;3vwp lgz x,z7ds once the circuit was closed?

  00.23: If all of the g *nw5da7,pz hresistors in the following simple circuit have the same resistance, which wou7dhg z 5aw,p*nld dissipate the greatest power?

  98.34: In the accompanying circuit diagrao) (fn j dz:4ni9wl59o7zg mfdm, the current through the 6.0 Ω resistor is 1.0 A. Whatom9d9)i7zdfzownfgn (5:4lj is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in sqjolls oq)-ye *q)3t 75nbid3eries to a battery. Suppose R1 carries a cu oby lq-jq*7)3)dqone3l5tis rrent 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 p,:vm k qclfq;.arallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 disscmf.kl vqq:,; ipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is the maximum m.cvj:vl6n,jh x3w. svalue ol:wn6vsjj.hv3xm c, .f the current under these conditions?

  99.23: What is the resistasy bwvink:(:5sig; e++, elw knce of a 60 watt lightbulb designed to operate at 120 voltsvkw+ kw:+sigen:(y,i; l bes 5?

  03.09: How much current flows through a 4 ohm resistor that is dissipd4n)( ya nqyh(ating 36 wa(4dyhny nqa)( tts of power?

  05.21: A household iron use1bxgiipf epr(.f2fdm pz366zjf*3 9 vd to press clothes is marked "120 volt, 600 watt.” In normal edg(rzxj*pf93i 3 162 ff.i vfp zb6mpuse, the current in it is

  01.05: Which of the frmj o;y 0la/4qvag+sdz9 0ovjk5jq 88ollowing resistances could NOT be produced by a circuit contj kqoramjq /9a+y 0;jlv5 sd48o8v0z gaining only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the fo9j- +nhjp)2v(e4 jscfc 2hs*vk)(,p svs wquwllowing equivalent rjnf)*c-jpwq s v42us+v ,kp h)(ss9eh( vjw2c esistances CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can ;r6by 8f al/ou+apy +xbe connected together in different configurations. If all three resistors are used in a circuit, how many ao +f a/;xuy8y+l6r bpdifferent values of total resistance can be produced?

  97.35: When a single resistor is connected to a bat;m hbx- y d:s)lw5uqs zm7v3r8tery, 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 batv5 ;8hz )wsudq3rmmsy7l:-bxtery is zero.

  96.16: When two resistoa xz7bep1kix-6r f3r /rs, having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following7k /pr ebx-1aixr36zf statements about the resistances is correct?

  02.46: A hotplate is designed such that ip7 ew)oujl 57rt has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it wouldj)5 wuoerpl77 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 tha4kswknv8i2slfd/+k5 cpg2m blf6l, c.n: / la t is dissipating 36 watts of pow /slbcn4,mg5k /wflicfpv8. 2d +knka2:s6ller?

  01.24: An electric heater draws 13 amperes of currec,k.;tcela 1 ynt when connected to 120 volts. If the price oft.ye,1c ckal; 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 1zy l6cc/zh3-r00W lightbulb lit continuo 6crz3c/hyz-l usly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current o/e8o3dz*i8 ah6g5lrlffb1x e f 4.00 A through a lightbulb results in a power of 24.0rh5 flgeb*oel68fad3i/z x8 1 W associated with the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a famr jjiiuz ,wj*(0sk.w66e5actuh g7 h*ily of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a sinjr,(** k .u5e6i7jic awj ughz6w0hstgle circuit protected by a 20 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form aypqfxv s9 n)pa2,u9m8 simple circuit as shown to 9s9p) funy2xm8 apv,qthe 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 ew -3uv58 zlvna simple circuit as shown to th wlv -uv8n3z5ee 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 are cw5gxcb iz l 9gwr9j4 *-i(sx+o-i7ckaonnecwxk bx+g9o*5wgz47scla9 -(jiri c i-ted as shown. With the 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 conjt ez*pxv)v( ba(bpmu/z:q .(v sv55vnected as shown. With the switch open as shown in the diagram thv*j(uz.sv ep5 qp b)mab((v5 tv/ vz:xe 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 t9:x t9vhl h/bconnected as shown. Witb:v9h /htlxt9 h 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 resistancym(qsixx1157biu :vnsw y10t,g dc f)e? Assume that all wiresd01s:m(u i vys11yncxf i75t)x, bwgq are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistas2a2gew htg dzam ,zkf.*4i16v95ea ence of the circuit shown to the right with resistances 5ht,2kas6eza *azwdv1 9geg mfe4i.2$R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected 4/er+gsc;g fltsbn21 in a combination series and parallel circuit to a voltage soucggtf; +ns21/s4 bre lrce.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical re )r .creaw njpwo.yc6xfwnfh(5 5:u.h -2c.pisistors connected in a combination ephf5wa )orph n.(.un:c5c 2-r6wy.jc wfix . series and 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;t c jpl,p6z6u2ibr r5sackz3*y n ) pd+6zmd. bulbs are identical. Which bul*c6,ydppzizdr l2)n3uaj tzp56r;+mb. kcs 6b will be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switq(th3, hmba vnfm0a3 ,ch and three resistors are connected as t qhfb3 mnv ama0h,(3,shown. With the 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 ar*- w) 8-;egpolmdglvce connected as shown. With the switch open as shown in the diagramd* op;c8v mg -lw-gle) 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 thr( ,(o/2;/xrl ,4dypqeb pwt zq e+mgw1bqz(y iee resistors are connected as shown. With the switch ope4er(,ibe( zo qz;d/2x y pw+mlpbg/w q(tq ,y1n as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?