16.09: In the circuit shown, c 56)obwenl:3o y (aiflc abb+n51yz5an electric current exists in the metal resistor connected to the battery. Which one of the foloz+ :1yw 5cfo53len )bb6nibc(5yaal lowing 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________y ipco+/ pygjc h(b5m,27j8wu_each resistor is the suopwjyp2( ,jy m7 8ihccb/g+ 5ame.

  06.33: A current through thea/t:w4- vxja( i a.ltkc05j fid1r(mu thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens jda1 ir:0jw5v(a .-(tuxtf kail/cm4because

  13.08: Some standard household liev 9ywh tnk -29nf82ub w5jbt4ghts are being replaced with LEDs. LED is the acronym fo9v 4 9jhynettw-825w2bnu fkbr which one of the following choices?

  05.16: A cylindrical graphite resistor has les- 24h4jijrpk ngth 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 resistivity to the old resistivity of the cylindri jp4rhji2s4k- cal resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has ufa1 ;zdqp kz cm*-e*9lae14btwice the diameter anuq9f zm-e*; pk4b*dzcl 1e a1ad 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 aneox:b9e ;wzdz y;(;t cd half the length of wire X. If wire X htbw;yd9z : zec(ox ;;eas a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and ra. d t g*alkzddc3+ i2wmxbf*3;dius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of thik*l;a .xc3b dtd2g mdw fi3+z*s material because of this process?

  07.27: A junior Thomas Edison wants to ;dt7esa1ta 7c* .hdb amake a brighter light bulb. He decides to modify the filament. How should the filametc7 ed a. ;dt1*ash7abnt 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. T : tuhp*bj9e(ry,e4iw he length and radrhp y,w eb:9(*uitje4ius 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 resistance R, are connected to a battery i-5 j90 qp:3mhkxpqff1e b bjxqh(*w-jn the following way: “h*hf f 5x(qp b3:wj jmp9jb1qqk0-xe-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 resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram hasnoy o.11 oc5hu t1wbx/ internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter read.5ty /onuoh cob 1x1w1ing is most nearly:

  97.37: Consider the comp4aiq ,5k.n syyound circuit shown to the right. The three bulbs 1, 2, and 3 - represented as ren 5isa,ky4.y qsistors 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: 1 yo(.blnovm electrical circuit at the right. If the current in all three resistors is equal, which of the followi (nv 1byoo:.lmng statements must be true?

  99.37: The diagram at right represents a simple et ., .y+dyrdmilectric circuit composed of 5 identical light iyd +,tm.y.rd bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true conc)4 j yqo4-frewxd j0l5erning the simple circuit shown where resistors R1, R2 and R3 are have equajjw0fql4 ry)o-x4ed5 l resistances?

  17.29: Two lightbulbs X andY are connected 8d)war-2:pob 2cihwhin series 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 following choices best represeniwad)r hpw 2hb:2- oc8ts what is observed?

  06.34: How many coulombs will pass through the identified resistor in h ,t :mkhubrl4w5y4b .a.a;tr 5 seconds once the cirhah4y:54.r, u ta rb;ktb.wmlcuit was closed?

  00.23: If all of the resistors in the following simple circu1zj 5j+otqo 9wza 6e/94px fxsys3*yjit have the same resistance, whics 4 91f5+jp*9j6ta3ojyeszxwoq/yxz h would dissipate the greatest power?

  98.34: In the accompanyin tr, qotvi)7k4bt7;pbg circuit diagram, the current through the 6.0 Ω resistor is 1;bvttbp)7tro,7 4q ik.0 A. What is the power supply voltage V?

  97.27: Three resistors R1,uh/cl35de iax52 te,q R2, and R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, andeal5, 35q itxh2e u/cd R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three differen90w0hys*n yf+x 0gc/ jyxh g5mt resistors R1, R2 andR3 are connected in parallel to a batt5+j9/s 0ynw c0hyx my*ggf0hx ery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and x a7cdi3(xao 3g2lde 8120 volts. What is the maximum value of the current under these cdga(a3ei7l8oc 3xx d2 onditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operatv5 onqwwj1hy158 7h sai7 .jyne at 120 57.7 11s nnjvywqih5a 8hyojwvolts?

  03.09: How much curren2:3f 7ue -j x4ywt(8aksqo bwbt flows through a 4 ohm resistor that is dissipating 36 watts e-:j7bbfaku q txw (2osw4 y83of power?

  05.21: A household iron used to 5 au+-znqw) xwpress clothes is marked "120 volt, 600 watt.” In normal use, the current in i)q5-az nuw +wxt is

  01.05: Which of the following resistances.43dy hvc;c px could NOT be produced by a circuit containing only thre pccyhvx ;d4.3e identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the followin9frsrswl1s4c0ei n-0o;mkv , g equivalent resistances CANNOT be produced ue0vc,w o;0rlm14s-skf s in9rsing all three resistors?

  02.06: Three resistors of differentq aekc82 1 yx.okqy (e,uq1uj5olp8; b values can be connected together in different configura5 cxu.k1, k (ye paeq8;y8jboolq12 qutions. If all three resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, fio:4d8.vi mbk)j ph )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 zei)v4.:p di8)bokf mjhro.

  96.16: When two resistors, having resistance R1 and Rwyg h.b+4kp0,js rk2o,mr(nm 2, are connected in parallel, the equivalent resiyk+r(hw ,njo s0p,4mrk . gm2bstance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance2kqi/s *q, bp6siq3 fe of 12Ω when operating at 120 volts. What is the minimum amount of time2pefsis */ qkq36qbi, 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 (po7m,y/f: uz)qvlazis dissipating 36 wattu/v maoz)zpq:fl7( y, s of power?

  01.24: An electric heater draws 13 ampd w twb,,kf)9eeres of current when connected to 120 volts. If thdk) bwf ,wt,9ee price 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 lcu;5lnba b hte+)dxurw)- d90it continuousl b a+dw0xb)9trdcel5n )huu-;y for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb re2aw2(8e/mjn frw g:tf sults in a power of 24.0 W associated with the bulb. Which one of the following choices best represents thejf enwf:m/wt r8 a(g22 resistance of the lightbulb?

  01.10: Each member of a family of si mm47eo(id.fax owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 2 if4 em7.(damo0 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is iwjo2j az- u22x 8,e qzt ,8mpuose9q,connected to four resistors to form a simple circuit as shown to the righ,9wqjmz,upxseot22,8 -e8az ui j2qot.
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 ci(n(60x kdmr4kg5q2xw lxvm l.fbd .m-rcuit as shown2q kmxf.6 0(n vk5 .xm ldr-wg4xmlb(d 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 idea*f 7b+golc ti-y yok,5l ammeter, a switch and three resistors are connected as shown. y f+tg*kil y7b5c- oo,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 batte/j2llj x0xfkadwf: : 1ry, an ideal ammeter, a switch and three resistors are connected as shown. With thx:l2/:f xfw0 j ajl1dke 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 ib9 go dxj9eh2.deal ammeter, a switch and three resistors are connebg 2h odjx99e.cted as shown. 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? luueg-06;;j: hmw4 kw2vqwwa Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical reswv;;26e k u4uaw 0hqw:lgmw-jistance R.

  09.07: The equivalent resistance of the circui guon)z(k*s t+5nt )xbt shown to the right with reso*5 tb)t+) skn x(znguistances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram b ;mwu*dri1 t2pelow shows five identical resistors connected in a combination series and paralt;* r2umw1 dpilel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a (vdj qua 4it kds6wfu-7-7nj0combination series -7-(6i07sav dwuqkuj4j d ntfand parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, 3uo7+h exkg2nhv-ks 7c 8owc3 all of the bulbs are identical. Which bulb will be the b8ckc vg3 +eo hsnk27w3uhxo7-rightest?

  02.21: An ideal batte6i0h s s2yo/lnry, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the di6l n0/o2 yishsagram 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 switc,j6 nhw: (oxvl bw/hh 3k.2mush and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 (.2, vxlsubm k3hjww: /hn6 hoamperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter, a switch andilp+qpg6nc ;zk 3q80i three resistors are connected as shown. Wi i0l8c3 p6;zn qigqkp+th 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?