16.09: In the circuit shown, an electric current exists in the metal resistoltd 8 w qnrl.d3/tcbwh7m72jh w ck9+)r connected to the battery. Which one of the following choices best describes the direction of eleck9whtl 7 cwddwc3j. b/h r 28m+tlq7n)tron flow through the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are conshvd:; wi l+rx: p7j2enected in parallel, the_________each resis:x+;he sjrl2pw7 d :ivtor is the same.

  06.33: A current through the thin filyx4o,jgd jhl02k q4q -ament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. Thhq420oqyx j gkj4d,-lis happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is the - as9*p y9auy8hdnb q;acronym for which one of the folly snauba9;h9dp* y-q8owing choices?

  05.16: A cylindrical graphite resistor l x oye.44gv+ohas 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 lengg.+oe 4xl 4vyoth 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 the same material. Wirv)nd5q+qs+f y m*15 oi-*pqwwqmvs d5 e II has twice the diametf 5-w vs5mm+wdyod+p1qq**qq vs)5iner and 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 ankx wytfpv4 8+,d half the length of wire X. If wire X +w,kypxt f8v4 has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical4ra 5vcco/am*b0gc 5wz 2kc .c resistor has length L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the m5cac52*wc brcc ovgk0a.4 /zresistance of this material because of this process?

  07.27: A junior Thomas Edison 8uz4d3,k8 kzv-raqt rwants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbul r8,zqr34ad-tkuv kz8b 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 length ay.qvpzzfxg vbv5g1rh+s;2,etxr3* , 2pr9nl nd radius ofq2f;r,1gz xv5t3* h lv+yz9.sv rnepp x,r2bg 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 ofc x(ufdv+,* 6iszv mm. resistance R, are connected to a battery in the following way: “Two resistors are connected in series. This combinatio 6md.(z +xiuc,vsvfm* n 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 has internal j1i:b 75gf5o ft7o83sutt rs lresistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter readinggftbt7:8l i5j 51ts froso3u7 is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. Th)al5qlc*tig92 9)f1v n.etokic m 1she three bulbs 1, 2, and 3 - represented acsfi*mia )kt5.l tvhc e12 lo9g91n)qs 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 circuirwp ezz)drz/14 zda:5./ gv mit at the right. If the current in all three resistors is equal, whic zzw g4ia5 1z/ d).ervpz/:drmh of the following statements must be true?

  99.37: The diagram at right represents a simple electrhpv ke4 gmd9;u( v4wc+ic circuit composed of 5 identical likdvc m9gp4u v; ew(4h+ght bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the foaiqa-xq0gr p by ;p3undu21:2llowing statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are a1n 2up0ypq 2ui d-rxaq;b:g3have equal resistances?

  17.29: Two lightbulbs X andY ar4n (z(rl4en frnn. baj.,e5lte connected 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 parallel w .(( 4azrf.njtebnlnre 5nl ,4ith each other to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identified r9fmyg tg/w1/g3jb x ccw k++e+o y3z:desistor in 5 seconds once the circu1:bmygx +jwwtkd+/ occ9y f/ +egg33zit was closed?

  00.23: If all of the resistors in the fln-op585krhaww .rng yr44e c j,9sj9ollowing simple circuit have the same resistance, which would dissipate the greatest powwre yonc .-js 8a5k9nwl5,pgr j h44r9er?

  98.34: In the accompanying circuit diagram, the current k(qo8qg s+ 5sn+/qa7ewmj5b athrough the 6.0 Ω resistor is 1.0 A. What is the power supply vo a5qngsk(e q+s7aboq+ mw5 /8jltage V?

  97.27: Three resistors R1, R2, and R3 are connected in9,)bhlgt;o7mqadh,ndr g 9; f series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.09qdg9a 7 h,d;btho) g ;,fnrml W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallvrb/+4wbh g7 2(- rnoi;5xwd-q gglrlel to a battery-vrlrodb2+qr;( w-7gx b w/inl45ggh. 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 120 voltskq:1o dt6)nht. What is the maximum value of the current under these conditidtno)kht1q : 6ons?

  99.23: What is the resistan70 fpa)ffkpa.ce of a 60 watt lightbulb designed to operate at 120 vfapp0a kf )7f.olts?

  03.09: How much current flows through a 4 ohm resistor n.ftng-gg2zjsqk 0y;17; ajf that is dissipating 36 watts ozjf2qjg70ft. ng; ks -yna;1gf power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.” Incs0 2 rslnq5u5 normal use, thq5 2 ul5crs0nse current in it is

  01.05: Which of the following resistances could NOT be produc- szyn16 o1x:sjq,uzh ed by a circuit containing only three identical 6Ω resisyxnzo-z:sj61uh ,1s qtors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalentesfu;/yn n:m + resistances CANNOT be produced using a ue:; nm/fnys+ll three resistors?

  02.06: Three resistors of different values can be connected together in diffmma1n,ms,8nl erent configurations. If all three resis nmm8ns1ml,, ators 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, a total power P is dismt k l*3q wpa)yuhj8))sipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in series usiny)mwjl* ph q)uk 8)3tag the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance /f1o h -ahg,xrR1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances 1o a/g,x-r fhhis correct?

  02.46: A hotplate is designed such that it has a resistup 3dg bog6a i3sx0l3+ance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take t3s6ub0oi3gpd x g+l3a o warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flow7lqr:fiz qpkx l( 46z9s through a 4 ohm resistor that is dissipating 36 watts ofi( 9lzkq 4qpf xz6:lr7 power?

  01.24: An electric heatez e2jpk7,l(5e(s egj nr draws 13 amperes of current when connected to 120 volts. If the price of electric2ee 5 n(ze,lpjk7gj(s ity 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 lightr lc9/xws9qogr4 c0 u3bulb lit continuously for 1 year 9c 0c/93x4ru lwqsgorat a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A throug-bvxds+ a a sn)(i7 r;ege(z6sh a lightbulb results in a power of 24.0 W associated with the bulb. Which one of ;vez a-se7g x+ias ( n(d6)srbthe 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 sipdre6, l;v,1,yxlk in a 120 V circuit. If all computers are plugged into a single circuit protevipd lk6exy,s,1; , rlcted 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 connecte lz/qx. nz o7a:ace2,-bnjh0ad to four resistors to form a simple circuit as shown to thee hjnc2:a-q z70a nbo,z/lax. 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 a simple circdazfc3 r+jc9aw(jx.x)pd(omn1 s7 .buit as shown to the right. xcoz9 )1(3f ara(p.xcwdsbdj n7.mj +
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 con gne,,nk yx8r z.c7qp)nected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.nxkpgq y, n.8rce 7z),
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ammeter, g*rof qj2a,p( a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reap(q fjoa*gr ,2ds 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 resi o9oyjz 6 57aiy7jfsky)* 6zhgstors are conne g*7yi75skjzf6 jyy6)a9ozoh 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 res3e)gu*)hkyi histance? i 3kyh)ue)h g* Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resix-ta t;y,ce 3pstance of the circuit shown to the right with resis xe, a-yct3;tptances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identicaqdr-/b,n k*m+)bluwgl resistors connected in a combination series and parallel circuit to a voltanb kd, b*mqlu/w)+gr- ge source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a co-ofef(l1 at b6 it6g4xmbination series and parallel circuit to a voltageo1lgx 4 6tae fit(6b-f source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are ez0d*z-4pf 3zra s*kzml ws1-identical. Which bulb will be th*fs4lkm sezd0r1 zza-3 -*p wze brightest?

  02.21: An ideal battery, an ideal ammeter, a sw+y--605vcmjqfq idca1dg 8k )fg b,eeitch and three resistors are connected as shown. With the switch open as shown in, -g qy+g6d)ckqba05vfm e8fid1 e- jc 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 thre* r 1; uzbwqrzxy0 ,ii4ztl.y8e resistors are connectwrxb .*1 i8;rqiyy,u40zlzzt ed as shown. With 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:r1bdbktjt xggv98 u+i1-3tm , an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reatk trgtx :1 -v3gb8jmu+ idb91ds 2.0 amperes.
When the switch is closed, what would be the current in the circuit?