16.09: In the circuit shown, an elec-pex.-jxwbuw +,n37ceo uy-ttric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the de-3b- x t- y.xn cwwpuoeu+j,7irection of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, thefi: 0,o/nrdrg ir ns ree;y9:(_________each resistr:fd i9sero(n0rngr i;e,y/: or is the same.

  06.33: A current through the thin filamn t q 5m0vyztal6xc72hbz*43h 4o0t qsent wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens becauseoz2t6n 3l qah40zb4t m*qx5sth0 7 cyv

  13.08: Some standard household lights are being reyk*vv d 2kq7 s,-y8aw25tyy mxplaced with LEDs. LED is the acronym for whic v8yxqk ,252w d7*y-ast ykvymh one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area A 5 a8f0pd,cl szyy-wx9. It is to be placed into a circuit, but it first must be cut in half so th5lpyycsfd9xz w , a8-0at the new length 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 mater2;eos ,4etjg mial. Wire II has twice the diameter and twice the length of I. If I has resistance j,e s4; ote2gmR, II has resistance

  99.31: Wire Y is made of the same h(b+z u l,zr3rmaterial but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y woullr bzr(+hzu3,d have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piehu (q:,oko --n rr5afsce of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material because of this procq- :h rfas5ko-, (ruoness?

  07.27: A junior Thomas Edison wants to make a brigzak p1 *pgw;m2hter light bulb. He decides to modify the filament. How should the filamentpp2wma 1*k zg; 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 sameu7 +qnmctcq3i rg:1 l0 material. The length and1 r 7 3cc0umq:ilq+tng radius 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 resist )s5unf:a -u e1ok8wjbance 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. This set of three resistors is connected in series to a fourth resistor.” o)185sej unak wb u:f- What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying / hjatwk ya(6(circuit diagram has internal resistance 10.0 kW anh((k6tawj/ y ad 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 rn3wqs*as( qa8 dvi7e v0*z9mcompound circuit shown to the right. The three bulbs 1, 2, and 3 - represented as rea**(wzi30snq8 9q evrdmvs7 a sistors 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 electpggpok5 z0) (+02ntq 6qtkg dj)nwx 6zrical circuit at the right. If the current in all three resistors is equal, which of the following statemnjo6zg5qt gzkpw+ xp)qd (g6k02n)0 t ents must be true?

  99.37: The diagram at right represe 0(fbqfcmca7ub: xsgb+wu 5 (1nts a simple electric circuit composed of 5 identical light bulbs and 2 flashlight asqc bu xgfu51bb+mfw0((7:c cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is)xjz4m jch3b. mc)/ez NOT true concerning the simple circuit shown wher)/b zj3xm) z4ejcmhc .e resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series t scggv 3a: l6 t;r8s7ofrbacn1aji 6:0o a battery. Bulb X is brighter th:7 ja fscctvr:g1na o ;r36b 86aglsi0an 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 represents what is observed?

  06.34: How many coulombs will pass through the identified resisty/ owwc 6u4jl;o4ud 5kor in 5 seconds oncel/oy;u4j d64wkwou 5c the circuit was closed?

  00.23: If all of the resistors in the following sijzafk.zb0x03u coi;3k8u d,h mple circuit have the same resistance, which would d8ax0j 0 kiu3c3hzfu ,z k;.bodissipate the greatest power?

  98.34: In the accompanying circuit diagram, t- qxfo+9wf c:)s+7 cqjy8 ckwjhe current through the 6.0 Ω resistor is 1.0 A. What is the power supply vqwo x-k 98wcjs q7 fy++c):jfcoltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a batteryzc95dtm *e af.. Suppose R1 carries a current of 2.0 A, R2 h.df tcea 5mz*9as 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 an :az 1.0od 7f pf/,d wmga3;ed2hbqhwidR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 d.dpgw1da;2 7:,oz feh0 im/awqh bf3d issipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What isql7pu ac +8d c)n;sj1a the maximum value of the current un78 dlq+ j;cupcns1aa) der these conditions?

  99.23: What is the r6xuu k o+480uup w,asvesistance of a 60 watt lightbulb designed to operate at 120 volts4uu ux aw6s8,uko0+ vp?

  03.09: How much current flows through a 4 ohm resistor.wxruzrl e47 o8pshoh 9l) i,- that is dissipating 36 watts of powero )h 89 .ix7-rws e4,prlzoulh?

  05.21: A household iron used to press clothes is marked "120 volt, 600 wa, nfakiohb q,5)uj2)ftt.” In normq )ohb,,fk5f)i n uaj2al use, the current in it is

  01.05: Which of the following resistances could NOT be pvz uu;kf1/:uxroduced by a circuit containing only tuv;xk/f 1:zuuhree identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. am+i tssq3f+0 Which of the following equivalent resistances CANNOT be producis3++0 tq fmsaed using all three resistors?

  02.06: Three resistors of different values can be connecle*gq kh,cnn47 6f)t ated together in different configurations. If all three resistors are used in ah a,n4 n*q l6fg)e7ktc 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 p w7oh( c-ree..fl6x4 jn5te;fbrb9i is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in series using the sa behboref- .6lpf r(;.7tcnw5e ji9x4me battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resia7 l qf(;m8wristance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about t ; r8wfi(q7lmahe resistances is correct?

  02.46: A hotplate is designed such that it ha 52c daaw.;vu x56b -zrcboh,ls a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to waa5vld-,5c.6 c ;rzb2ow bxhaurm 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 is bg y9r,un4e s27sl4im6w e+sp dissipating 36 watts of power?m w2b,l96+yurs p4esin e g4s7

  01.24: An electric heater draws 13 a -msg( v tr5jhb5pvj5 57,igxfmperes of current when connected to 120 volts. If the price of electricity is, (xfgmt5vsj gbp5 5-h75rvji $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how 8nuo btv8c: -mzv8 mzxviw(9 -much would it cost to keep a 100W lightbulb lit continuously foimvm v-8uz o:8z8bt9 cwvn(-x r 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a po wxv86yyd*w7vwer of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of th wx* 86yvvwd7ye lightbulb?

  01.10: Each member okahn+ da:y,i sv.)8fc 0pn-vdf a family of six owns a computer rated at 500 watts in a 120 V circuit. If all comput8k0i,+ fd:sv)dha.v ya n-pcners 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 connec 2h8)aer:tn vz,cyvn 7ted to four resistors to form a simple circuit as shown to the rige7,2h:vn yrnt 8vaz)cht.
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 resistors0wed0 azid vu6r m,o g.8d2;ct to form a simple circuit as show,u e d0;6cd8wa t02oriz. vdmgn 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, an8bw .9id 8 ,unvxac+im ideal ammeter, a switch and three resistors are connectwvi ni98.ba,+u xc8dm ed 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 idealojt091epof3vts/gn7 t:u2d z ammeter, a switch and three resistors are connected as shown. With the switcptgtd10397n:/ vuo2st zofje h 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 arkfru./x8asp 0l+axo3i;9w o6nj: s kee connected as shown. With the switch open as shown iju3;k 8ar. 0k+xo6pnlsxo:/siw e9 a fn 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?lvmuulx +bktj9n/,e 0:0 q** gq bk/sp Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistanctlb gnev k/ +kjm*/psqxu*:u ,lq0b90 e R.

  09.07: The equivalent resistance of the circuitjpem w zii;jfe /,pynh2lt,( 0o),iue6h b/0w shown to the right with resiswyhj2 n ,,ebjuth 6iew 0mole(fi//i p0;z ,)ptances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram b1yw( vq.ht,t xelow shows five identical resistors connected in a combination series andyt(xv q1, hw.t parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identicam mv7vb+zx1u g,n1 2paxph8e .l resistors connected in a combination series and parallel circuit to a voltx2 +pe g1 8a z1hm,b.vuvn7pxmage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the gf0ezitkrsmhyt q)z, ar58 y- u13+4s bulbs are identical. Which bulb will be the brightest? grz),u 531z0qkety rsht+f8 ma4s-yi

  02.21: An ideal battery, an ideal ammeter, alovo q4 c o:c+ik/ed*( switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. ioo d4koqe:l(c *+/cv
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 conn4 ub6j: ary4l t-;hrbrected as shown. With the s al:rbyu4rbth r;- j46witch 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 resirud).y+o v3uvot6) ss( m 4bxistors are connected as shown. With the switch open as shown in the diagram the ammeter reads b ()6+vs4vyur mo3xti. d)so u2.0 amperes.
When the switch is closed, what would be the current in the circuit?