16.09: In the circuit shown, an electric current exists in the metal resistor wj0ivax :2 2y ku1t*-rynqnp9connected to the ba-a n92yk 2ntpvjwx1* :0qr iyuttery. 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 connec 3yoxs.s de,( f)mz+ee32j)l7nujqskted in parallel, the_________each resistor is the same.jum( keeofnq)s),3. + se7s3jy2zxdl

  06.33: A current through the thin es9 lv4(w/v mml 8z/uzfilament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happ /slz w v8m4u9(ml/vezens because

  13.08: Some standard household ligh6 b 3 ,xwxti:ld+spr5tts are being replaced with LEDs. LED is the ac,: sb6irtxp 5w+t xld3ronym for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and crzz ntzl )z),c;+tob8x oss-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. Whatzz+ x)l) ,z;bttz8ocn 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 I p):ouc3k pxph2 9o/etvugo 13ast6/w I has twice the diameter and twice the length of I. a/c/s 63vowgp29tt:xoeu )op uk1 3phIf I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but *y .;me 3rf jac /x-8mklbqljbvhd64* has twice the diameter and half the length of wid-ej/.br8vh m cy6lfm kjq3xa *; bl4*re X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L -a09m85qh txbn1pu-kq vb rg 0and radius r. This piece of material is xq- 01uq98bb5mpkvar -t 0nghthen drawn so that 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 Edison wants to make a bfdt8k+sl i)- krighter light bulb. He decides to modify the filament. How should +sl ifd )8kk-tthe filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The lengthbb 3ym.g7h+l;/ t evbd and rb+b vl ;/b7my3t dge.hadius 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 rumh drv53:j0 1oq,qoqesistance 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 q:rqm dquhj,o5o1 30v 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 accompanying circui+aynoijmaia+*n uu y7 )h-j5/ t diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmetuyia)u a/hj+iyn+* j n-m7 5aoer reading is most nearly:

  97.37: Consider the compound circuit shown to the righkx6o fk:- 845tgyqviz t. The three bulbs 1, 2, and 3 - represeqkg584:6 fxtovzi -kynted 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 he9s nqof,xu 9 1:1airthe current in all three resistors is equal, n1,s io:a9uh 1qfrx9e which of the following statements must be true?

  99.37: The diagram at right represents a dai k-;bla(m; simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (orkbi; am ;-ald( bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple circu ;cht29 tmi3 a/oziw,eit s wce2iotmi9,ht;za3/ hown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in suj*+lcde bgihox-di- w, 71z2.7fud l eries 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 the same battery, which one of the followinhzieldd,+ou1 c-- *i g 7x.l7f2juwbdg choices best represents what is observed?

  06.34: How many coulombs willhrcbm5 tuj8j ))zk k3) pass through the identified resistor in 5 seconds once the circuumc)rt5k)hjj 8zk3 )b it was closed?

  00.23: If all of the resistors in the followinn+xd/fowx ;eye5ot 2- +f: urkg simple circuit have the same resistance, whic+edywxefox/:;-uf 2no k+5tr h would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, -vpu yl106hhb the current through the 6.0 Ω resistor is 1.0 A. Whvp h6yu 1hbl0-at is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are conzyx y 1r+3xsz9nected 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 is the voltage across R3? zr1s yy39+xzx

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to1mflza7.d ay ( a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the1d7m fazal. (y current in R3?

  99.13: A heating coil is rated 1200 wan:4t,5dkl arp tts and 120 volts. What is the maximum value ofpa4l,5 rktn:d the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 127ks/e endys8fc.n/k)7 wo-w+* mwhcz0 vol n w7ow/w- kd*)+8s/.zesfnmkcch7 yets?

  03.09: How much current fl p 8rdzk-/tru2)osn .fows through a 4 ohm resistor that is dissipating 36 watts of po sp.-/otd)2zkrr n u8fwer?

  05.21: A household iron used to presf.f )-6 pvmm/8eyr ciw a3dw,ks clothes is marked "120 volt, 600 watt.” In normal use, the current in it is ,f-3me a ydk8rpci 6mwv/fw.)

  01.05: Which of the following resistances could NOT be produced by a circuit vun(,o+qqd0x ;;0dug cxz9rn containing onld;vdncqq x ,90xnr0ug(ou ;+ zy three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistor3tdnpu5bn 7b/8x+f z0 b )fdoe ,trkp-s. Which of the following equivalent resistances CANNOT be prdkb,b 7o8tfe z 5 upr30d)n-pxt /fnb+oduced using all three resistors?

  02.06: Three resistors of different values can be conne p tj djjc5we/i02a5hsqvx1*8xe3f d8cted together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be produced?e53j2i8 cpe5*/1qh jdxs0f jt8x awvd

  97.35: When a single resistor is conn4o 9ypi 4 +szmhue2m g0uug+v6ected to a battery, a total power P is dissipated in the circuit. How much total power is d+4o0mvs g9m+y6iu hgu z2pue4issipated 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 R1 and R2, are coa(iby jl45tug0y 2gzfo/z4 biz+w 2 m7nnected in parallel, the equivalent resistance of the combination is 5Ω . Which of the fo5zuf+ y0 m b(2yo27ig lzbta4wji4/zgllowing statements about the resistances is correct?

  02.46: A hotplate is designed such ths fy 2)e)zso.pfi09xuat it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of tim))us x0foeiyf.z 9sp2 e 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 thatpw2(udd 9pmy- is dissipating 36 watts of powerppyd-9 um(d2w?

  01.24: An electric heater draws 13 amperes of current when co0b(9feed8 vz q ;ipj5ewj)u 6fnnected to 120 voltsiz6j eef def(qwj9u;vp)8b5 0. If the price of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how mu2vuq,vc3 xwo a0x:2 oich would it cost to keep a 100W lightbulb lit continuo v,axvwoqx2 c2o0:u3i usly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lw4ym.q-lvk vl1b9g 8 eightbulb results in a power of 24.0 W associated with the bq4. b-9vl ykg1emvlw 8ulb. 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 1g kky9uv2q,0caq0 kw0x ( f0zo20 V circuit. If all computers are plugged into a singl,kgxuqk (k0q ayf0woz9020v ce 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 resistup0+ h idqrwx1.lws 5*zo8a3p dj q8b3ors to form a simple circuit as shown to theiq8 3hdawr.wsb l5qx8*3p do01+ jupz 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 isfg*3 cpzt2h t fma:00d,)q1qv+rlz/0 ralrcw connected to four resistors to form a simple circuit as smr)pzlz+q2 :l *tc 3 ad0t/,wqr 10rhfcvg0f ahown 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; z .q,mlgt.ry;rh nn6)qjwsldk-w96 ammeter, a switch and three resistors are connected a6 hg)wq mw;lk-rsln9.r zndt ;.6,jyqs 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 and0)rysf4g.sotm r (5gqp/ l+x z three resistors are connected as shown. Witgqs54gm+r x0 )f/s(ro.plt yzh 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 switch and three resistors eh49()dj9odu sa wrl)are connected as shown. With the switch open as shown in the diagram the amr9 a 49hdused)wl(oj )meter 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 the7o6n *08blql kqo7 vvy equivalent resistance? Assume that all wires are ideal, the v* bn7y0q klo6 lv7q8obattery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right iym7l6u/niw 2djygyx 4y86 o- with resis2y/dy y 6w8ingui -6xo7jml4ytances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistorsiyr1f hs0 c5ja xm2ay5ds*n+* connected in a combination series and parallel circuit to a voltage2 +1dxia5hcs*jrna 5y sfy*0m source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistorsj7,ap (b8 f2xj :qehda connected in a combination series and parallel circuit to a voltj(ax2 aj bhe8:pq,7fdage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, 0( zjgvm+q51.bdhj tball of the bulbs are identical. Which bulb will be the0jj (m+b1h.5bvqd gzt brightest?

  02.21: An ideal battery, an ideal ammeter, a switch a,*dsk5iwsghr;o*k l y. wvs/9nd three resistors are connected as shown. With the s*wrk.dsi*osyw /hkvl5,9 g; 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 ammeu/3htxv uqiu)j*0dk 7 xz aw;(ter, a switch and three resistors are connected as shown. With the switch open as shown d*x(uthv q jui0/)u 7;z3wakxin 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 switch and thre/tn2lq pqizeyqflev /mxuo +-wa5 :8xz0h ) 5+e resistors are connected as shown. With the switch open as shown q)zq:/0qf ml hpv+xl2ywnzeiua85/ 5o+t ex- in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?