16.09: In the circuit shown, an elhuto/ 10o t 7zhm,jow7ectric 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 direction of the electric field through the interior of th,m j1 hzow0/ot7 7huote resistor?

  98.06: When any four resif),ayogu l9i -stors are connected in parallel, the_________each resistor is a)ylo9,g-fu ithe same.

  06.33: A current through the thin filament wire of a lightbulb causes the fi-h3j *m*7nino9ukhnbee:0 js lament to become white hot, while the larger wires connectedo9se 07h:eknu n3j* j-bimhn* to the lightbulb remain much cooler. This happens because

  13.08: Some standard household blmmsdx +5eve+ u4hxv: pk693 lights are being replaced with LEDs. LED is the acronym for which one of pevbxmvh9x kml+ :53ds4u+ e6the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area A. p,hh94ojo z ravs3f.*It is to be o*9h. jasor 4,fp3 vhzplaced 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 cylindrical resistor?

  98.20: Wire I and wire II are made of the s44xe83)vaj qkr9 jikkame material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has resistjr38k)94j evxq4kk i aance

  99.31: Wire Y is made of91eesm7geu9*+ *fjp xx+s zup the same material but has twice the diameter and half th +pu 7e9f+z xs g1xpuejm*se*9e length of wire 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 and radius r. This piece of m,xvmgwb o149saterial is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of thim4xv b9sogw,1s material because of this process?

  07.27: A junior Thomas Edison wants to mg1h)fx q s4sb6c( h.hz u8/inaake a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a give4x18)gbhfcn( hqu.6/a hz sisn voltage?

  16.07: Three cylindrical resistors are mady1 *mi 9p09jc fj0whfee of the same material. The length and radius of each resis9j*f10e90 my hij fwcptor 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 battecz8vu 0upy;* ery 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.” What is the equivalent resistance of this arrangement of four resistov yue8p*cz;0u rs?

  95.35: The voltmeter in the accompanying circuit diagram has internal resis+adcu tb//m t3tance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. Td u c3b//tatm+he voltmeter reading is most nearly:

  97.37: Consider the cok j 9erhepn-l7/r9ptd hq582dmpound circuit shown to the right. The three bulbs 1, 2, and 3 -req/n5rt 8p-pd9 h lhd9k 2ej7 represented 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 electrica u, gb+7wj+eyvl circuit at the right. If the current in all three resistors isuj,g7ywvbe++ equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed ofoktq b.: ht7.k+rhat+ 5 identicat.rotqkhka+.7t+bh : l light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statz tn08t0rec9h3*olwd1 tdl 1c;iwlf,ements is NOT true concerning the simple circuit shown where resistors R1, Rh iwe*nc 0;ldcz,3ftr0wto1ll t981 d 2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. j):xcxr-u+lu /f/ x2zhz1xdwBulb 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, wcz h2f1 rl:x )//+udu-xwzxj xhich one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identified resis 7,k+ticq. uu*,fq h5 gyz1kqgtor in 5 seconds once the circuit was ct7+cz yfq,u qu*ihqgg, 5.k k1losed?

  00.23: If all of the resistors inapv o7fgf(tx)wr28 eo. 5z. k9kwuwc/ the following simple circuit have the same resistance, which would dissipate the greatekupk( 5w/gox2w8 cf.z9)raw tv.e7f ost power?

  98.34: In the accompanying circuit diagram, the ms (dk:- z l8ss;iobkn-xxo *6current through the 6.0 Ω resistor is 1.0 A. What is the power supply voltage V6ox --k sdi*skx ls;(bm:zn8o ?

  97.27: Three resistors R1, R2, and y ns2 2z(i qvfg8h -2:ifo+xcd,sfkv1R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resisi12+gqi nsfzv(h ocxy8kdf,:-sf 2v2tance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different revk4;cr3bzdu nz(nzrdf, n : mo -6c,;rsistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R rr 3-z4nkr zdf,m6;ncd,bz:ucn;v o(3?

  99.13: A heating coil is rated 1200 watts and 120 volts. Wha5ur*v ugnoa2 (9)kx+yi9kslq t is the maximum value of the current under thes (+9*yq)kos5ugilk n9r 2axvu e conditions?

  99.23: What is the resistance of a 60 watt lightbuxh t*nwgne9 6+of9+pfsp/ .wvlb designed to operate at 120 voltfog* 9xtfhnw/n6 vwes.p +9p+ s?

  03.09: How much current fl44h pawd33 9yal rd493y dmjsnows through a 4 ohm resistor that is dissipating 36 watts of pownpjd44dm9 lrs3a h93yw 4d 3ayer?

  05.21: A household iron used to press clothes is marked "1h0m p04djdmy2 y2sop*u, a) ha20 volt, 600 watt.” In normal use, the curr4u2 mdh00o aj dyhp)sp2y*,maent in it is

  01.05: Which of the followif*gohac5lw* h10eq-lue9ns y*: 8dic ng resistances could NOT be produced by a circuit containing on1dqyccfu0*e*8soe l *i9wh- lhagn5 :ly three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω res6s sc 0s(hik/pistors. Which of the following equivalent resistances CANNOT be produced using ack ss0h(/6 spill three resistors?

  02.06: Three resistors of different valuunt) -exl j(u/8oeac0es can be connected together in different configurations. If all three resistors are used in a circuit, how many differl8(utjue)/n 0x c-ae oent values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a tx)ra-nc,cns+d a0 p0e gol2ex;jda .3 otal power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical.n) adg; aaed,jx2e-r c3 pl+0 nsxoc0 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 R22l*r)xiydc fdt .c 9:a, are connected in parallel, the equivalent resistance of the combination is 5Ω . Whicildt cdya*r)fxc2 9:.h of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω wtg9ek.o*-tq then operating at 120 volts. W- ttko*g.9eqt hat 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 resisjsfj8( tn9x6fui5 8ud*ugcd 1tor that is dissipating 36 watts o65 jnfix8cdjt d1(*s uuuf 89gf power?

  01.24: An electric heater draws 13 amperes of current when connected to 12 0qjc9-ncrpr4;a33; hpn 7svhbu0u vb0 volts. If the prv7shc3q n3 j-n 4b hra;v0prp0uu;bc9ice 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 cosmf4n yt- (p4qxb ec1a4t to keep a 100W lightbulb lit continuously for 4fn-pcyxet4qam b 4(1 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 pow(ue4s3szy v z0er of 24.0 W associated with the bulb. Which one of the following cs u3z(0zes4yvhoices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a(yt mskg6z 4-)vvsau7 .k m7uh computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the maximum number of the computers c6 .kz7-mua7uh m 4kvsv)s(gytan be operating at the sametime?

  03.16: A 9-volt battery is connected to four 9 tay0eo9 s 5.1bbsxveresistors to form a simple circuit as shown toaeo5b1s9 yes 0 vb9t.x the 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 conngi5c xd-gsrr) six*zys9dhvn48 15/rected to four resistors to form a simple circuit as shown to the 95 8x/rgdx isr*isz1ysgh-r n54d)cv 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 ammeter, a switch and three resistors arer2 b-mepxc7m00db l,t connected as shown. With the switch open as shown in the diagram the ammet,r c7tp dl x2e0mmbb0-er 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 three4 ri;klql1+bjn1y agb - o1mh* resistors are connected as shown. Wi ; h4 *yq-n+lmk 11largjib1obth 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 ar:mj ydlcjf9w1 9z.z l:olp+(me connected as lzmjc1w m.9 z l::(+ylfjdop9shown. 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 resbe nd6v: g1f mg;.(nyhistance? As:(;1n bn.vg6dmhfy ge sume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with (rc 3x*;ydubp resistanrcd;3ub pxy (*ces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resisto-5j svbq/kg2*xmk1cj 0upy x ,8pk lw2rs connected in a combinationx-l5cbg1pkv/2 wmjxy0 ,k 8 pju* 2skq series and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical g4e. hos +conj-l+r*v resistors connected in a combination vlo4sjg+*hr+ -enoc . series and parallel 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 5/wr2vf0mnk7;ych+ah t et5y identical. Which bulb will be the brightesty5nwt ah5mr7+vy2 / hce;tk 0f?

  02.21: An ideal battery, an ideal ammeter, a switch and three rs - y9tbq*.hex0ssn3kesistors are connected as shown. With the switch open as shown in the diagram the ammet htks* 9ybsq-s3.e0n xer reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal batteryzez)/5 v*xo6y8xuv qy, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammet8yq5u v/x6v) x oezy*zer 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 are consx/x co8usz8- +wh *b7d1lvnanected as shown. With8+7wns/bdzsv1-8 hlo *uacx x 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?