16.09: In the circuit shown, an el- 1d ninuxj3sgh 7qu04ectric current exists in the metal resistor connectihd1 qnu3j4sx7gu0 -ned to the battery. 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 resistorq30r 9 f42 hmzhdj2etys are connected in parallel, the_________each resistor is the sr mzy3j dq4h09heft22ame.

  06.33: A current through the thin filament wire of a lightbu 5kv/ *r wlvdk)3)trq zo:d-dvlb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens becausr3-:k* vlvw/vt)q5dk d ozr)de

  13.08: Some standard household lights are being replaced wit5nw psu 8;ofy6il7,ru,d , rbarpk9o:h LEDs. LED is the acronym for which o sr,wbo 7y,6;,98rp iolun5k rd: pafune of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional arev 7s-1xnt zz;na 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-;7xzz tv1s nn 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 tlz8,3 jf iq*xowice the diameter and twice the length of I. If I has resistance R, II hioq jxl* 8z,f3as resistance

  99.31: Wire Y is made of the same material but has twice the diameter and half teli3ig-fq+y/ q0pd g3+u pt .she length of wire X. If wire X has a resistance of R t/p- .3y0q qd+ ltgi pueig3f+shen wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radiuskqbt m l3pr- z yyhsxu*b*+0.* r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens -*brm+0 qupsl.zt x3h*yy*kb to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulc;w ucw f;i5qjx(/6iwb. He decides to modify the fi 5wu(j;xiccf /iw; q6wlament. 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;2krsxxurt8ra3n / o 4 are made of the same material. The length and radius of each42rxa;o 8rn t/srxk3 u 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 r ,h fi)xlt/(go+afqj4k gwfj-5 xq-c:esistance R, are connected 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. Thisjf ) +cxg4x5 ka --fhtlg(oq:, /wfijq 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 cip +a.f7zu.yaf jz 60ehvk+/grrcuit diagram has internal resistancep+f+ay.zj/70f u gvzkrhe a6. 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. 8mvm oz:z4 + +tb.fnqoThe three bulbs 1, 2, and 3 - represented as resistors in the d.4b :fzm o8on q+m+tzviagram
- 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 electriqk1g2gp 5fnx v fmv2+*cal circuit at the right. If the current in all three resistors is equal, which of the following statements must be true? xvg*q+ nmk p521vgf2f

  99.37: The diagram at right represents a sim;e v:px*8 ybryple electric circuit composed of 5 identical light bulbs and * v8x;peyyrb:2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the f2tgg+. w7tonkwoi co*ss,93d:m8jboollowing statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resistancecwmot . n873 sjk+obg29dgit,s: w o*os?

  17.29: Two lightbulbs X andY are connected in series to a grq/** k oe9oy+jox v1battery. 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 followj/9y q+** gvookroex1ing choices best represents what is observed?

  06.34: How many coulombs will pass through the identifiedw(f*c u 0klwn+ z5)(( jwqet+ 8ymhnov resistor in 5 seconds oncetofn()zmu+ 5wjwv(nqy wklc +h *(08e the circuit was closed?

  00.23: If all of the resistors in the foap8(jo8 smgr *llowing simple circuit have the same resistance, which was*mr(og8j8 p ould dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6sp u y+jr7baq ,r-rd16.0 Ω resistor is 1.0 A. Wa1,7u s- +6brjp qrrydhat is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connkdhidad 1+ +0(2o t-pf. iesznected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What zkhdiid 02(t+e +o.- df1s pnais the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connectee,vpj0*ky6 jy: ,vdaxt zdz29d in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6yvz9d:yd ,j*2p0x6kz jeat ,v W. What is the current in R3?

  99.13: A heating coil is rate0jax8lxl1ah) dqhm -y )9 sdq.d 1200 watts and 120 volts. What is the maximum value of the current under thes jla .a-s91)yxqmx0dhd)qh l8e conditions?

  99.23: What is the resistance xf hh x2l56id )v+fg8z0ujmmg3 3 gf3mof a 60 watt lightbulb designed to operate at 120 volth3huf2+ i3)0mgf6g8zmfv3ld j x5mgx s?

  03.09: How much current flows throug.+tvo)gm ,z dhh a 4 ohm resistor that is dissipating 36 wattsg mdv oz,.+t)h of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600.h(ub bmq4pw : pt,1kvo)zo6 l watt.” In normal use, q61vh u k4mplz(o:bow ).pbt ,the current in it is

  01.05: Which of the following resic * .y vkjf)j,fl/+;t0er:6emzvh mm zt0t:cbstances could NOT be produced by a circuit containing only thre:lm rc6f;t,*k0+tmj b vymzcet .0 h :fj)/vzee identical 6Ω resistors?

  94.37: You are given three 1.0 Ω ck qha94p v4yrd6 vac985r1qp resistors. Which of the following equivalent resistanpvq4qca vh 5 d48ary1kp9c69rces CANNOT be produced using all three resistors?

  02.06: Three resistosg(c/zkvi ege.i .1+id)d4 z(fo*a ma rs of different values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be ice*gmdv.d4((+a1fsa iozgeki z)./ produced?

  97.35: When a single res 00p: xcxh szx1dg .c)wp+(ltiistor is connected to a battery, a total power P is dissipated in the circuit. How much total power is c:tcx(d )pg h0iw+xzx01.lp sdissipated 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 resistors, having resistance R r+udc7sqot;bgad- 8b+u 5; xi1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω +r;s u5 b8gcqxa7t; udi+ob -d. Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistan4atvjdo12tn:+p:4p hcc +pw. ad/ nwjce of 12Ω when operating at 120 volts. Whatddn :a2ntjphp .1+4+vwpaoc/j ct:w 4 is the 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 through a 4 ohm resistor that n;/p/ ;wabx x59cwif zis dissipating 36 watts of pwf ixc ;/apz9/b;wn5 xower?

  01.24: An electric heater drqlw7f a+91cad8 lqr5k aws 13 amperes of current when connected to 120 volts. If the price of electricity i89drall7k5q a f1+cwqs $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 continuo q1gm.2cds )5yd* /km*mhblec;v /dvously for 1 year at a rated q;yb2s )mmvdm ./ohcc*dk*/ elg1v5 of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through u9tvw:5 mv(0q1 xoc gn +tly(sa lightbulb results in a power of 24.0 W associated5m( 1ln9wt0su:tg q vcox(+yv with the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts in a 12poj w0g;l8n03dtl 8g(o yky7v0 V circuit. If al3l 8v0oj;(wp y0gg onldy 78tkl 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?

  03.16: A 9-volt battery is connected to four resistors to form a si gltvqhb9/q1eetp n:ub).p - ,mple circuit as shown to the r: ) pq-1beqhl,uben9.gttv/pight.
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 fd h:wr;fc/z*5+jtm j worm a simple circuit as shownc+*w; dwjz :m/5tr jfh 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 ideal5)wh0lgn1 /7xiilzwj ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter 5j /7g zi)llhx0ww1inreads 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 swi8stvzmmpqc:jdd);/q q:q1n. tch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeternzd/q1d.msc qv8:; qq: tjpm ) 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 s fbqaey)h 2- /ra5 51bh0trvwtwitch and three resistors are connected as shown. Withtbf5 /2vab)hrr5h0t1-qe awy 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, whateob5 zrz* (sgo7rf8w8 is the equivalent resistance? Assume that all wires are ideal, the battery has rez8 8ozr *(w7fbs5gono internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the cg(r i +p:chhk5ircuit shown to the right with resistk 5(g:hri+p chances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identicaku.et- wvn gia.r h5iw 8:te6;l resistors connected in a combination serie.e i8etkw .rt i va:5h;6-wgnus and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five idnk9vg x2z3n7centical resistors connected in a combination series and pan2zgx9vckn3 7rallel 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 identical. 0 qy2u ;n9gzomWhich bulb will be g youz92; 0nqmthe brightest?

  02.21: An ideal battery, an ideal aes2 t+9flqe: p w3smh+mmeter, a switch and three resistors are connected as shownh32 fq l+t ms9:wspee+. 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 resisto*dhk3ybc r5//.urht ka-b .h lrs are connected as shown. With the switch open as shown in the diagby *3./lach.-k d5ut bhr/k hrram 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 resistot2ngg ,g;(piars are connected as shown. With the switch open ast gp( g2ni;,ga shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?