16.09: In the circuit shown, an electric current exists in the metal resi0qmq5i wzkxb/o-ptp 02am 40s stor connected to the battery. Which one of the following choices best describes the direction of electron flow through the res awkbt4qppxo0 m-q mzi5/002sistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in pab+4z hq2 jx a(mo c1bjg*g:.ylrallel, the_________each resistor4 b+c. *a:2lyghjob1q m(zg xj is the same.

  06.33: A current through the qrpm-pp:d4u 2z dz9:q 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 bep :d9pd z-:2 qpruqmz4cause

  13.08: Some standard household lights are being replaced lz:e.forxfui p+l.(z2( i zh:with LEDs. LED is the acronym for whehoz: :z. p.l+uif2i z((lf xrich one of the following choices?

  05.16: A cylindrical gr wf vk/m(-5i.7fdp xbj+ nvn9eaphite resistor has 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 length is 1/2 L. What is the ratio of the new resistivity to the old resistivity of the cylindrical 9n/5efd + jp vxwi(mn.7v-bfkresistor?

  98.20: Wire I and wire II are made of the same3:pq ,sde9jo n material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has res3sn:pd,eo 9qjistance

  99.31: Wire Y is made of the same material but has twice the diameter and ha jnxo(prv;p,n- ++zellf the length of wire X. If wire Xoe(pl,vxj+ +p n- ;rzn has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor hac/ c 66ihanp)ms length L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. Whatip)cnmh66c / a happens to the resistance of this material because of this process?

  07.27: A junior Thomas Ediso 5f)v trg23a/6srlfr/y ej n1wn wants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in ordef e5/asgwnfyjr1 v)/ 623rlrtr to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same l9.)+ xch6slimq bq v0material. The length and radius of each resistor c xsqll9iqv+6bh m.0)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 inacf-vij-udvv +; .did-)s0y j 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 uvsi v)- j d-jddyc-f.i+ a0;vto a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internwbpfwv0ty i.v-+7 .h eal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. .vbeiy.w -0fh7pwtv +The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The threerdaysio , 3 qd-rwsydp0 c vm n.hg45*f*)m+z) bulbs 1, 2, and 3 - represented as resistors idd+4c vifsyrm)g wd,0-h*s q.romypan 5* 3) zn 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 circui/ jfv/ pd03bitt at the right. If the current in all three resistors is equal, which of the f jbvp3f/t0d/ iollowing statements must be true?

  99.37: The diagram at right represents a +76 t3i 07zibxhw lavksimple electric circuit composed of 5 ideni7hv3i lx+0k t7wbz a6tical light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following stj k;ns,)joma5 atements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have e,jmjokn )a; 5squal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X isc;pu;6k+9xrux mmjap+ n(fy( brighter than bulb Y. Assume all circuit elements are ideafx;6k uppn;crx+( uj(am my +9l. 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 resisto j7/zq/s(nndbcgfnnc(6 i:s,3 vd 6cz r in 5 seconds once the circuit wasnd,c(ncz73:ss i(6bf/g jd6zncnv q / closed?

  00.23: If all of the resistors in ki6 dfm i+*,blh ;lop5 the following simple circuit have the same resistance, which would dissipidk l6;pbmfih 5*l,+oate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 hb*lyjhv 2rikclo) m8;-:nn: Ω resistor is 1.0lc;lh hjrm-ik2:nbn ov:8 )y* A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a b:(we)dmcyu l:6v3va. vt ,lnkattery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of pow, c w:vyv.ea m3ukd:6)t(vlnler. What is the voltage across R3?

  99.40: Three different resistorsdi(g 2,5cq+v aqc vy.z R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What zi,.5dvq vagc c(+qy2is the current in R3?

  99.13: A heating coil is rated 1200 watw ks7kx4*sbi( ts and 120 volts. What is the maximum value of *b(sk7ws4i k xthe current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to d+pno3lz,rdohx : ,/j,it 0cnoperate at 120 v3h0dnd+rloot,/, p, :cnz ix jolts?

  03.09: How much current flows through a 4 ohm resistocgp* -p c*sv2wr that is dissipating 36 watts of pow*2gp pcsvw*-cer?

  05.21: A household iron used to wq0u ib6e954x: vpnuspress clothes is marked "120 volt, 600 watt.” In normal use, the curren5v qpe9ws u: 4ux60nbit in it is

  01.05: Which of the following resistances could NOT be produ)y/p 1m(wfk ticed by a circuit containing only thty) /ki(m1p fwree identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistor.z)pe9ar 7ikznr n(n9s. Which of the following equivalent resistances )nk r.p(9z zni79n earCANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together in dibqaw*w b()ip *fferent configurations. If all three resistors are used in a circuit, how man )q**wbi(bpway different values of total resistance can be produced?

  97.35: When a single)l:hok.j 5p*zfd fppnwnn7- * resistor is connected to a battery, 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 resistknpl.* zh- )p*jwd:57fno p nfance of the battery is zero.

  96.16: When two resistors, having rnhy-z mt zmm0o9jrv;,j.8 4 paesistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements abav;j nmh -pmyjomz, 94 zt08r.out the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when operats/32n;i tmy* lkyti)xka ia 73ing at 120 volts. What is the minimum amount of time that it would take to warm 0.45 k*y3ak /2is)7tt a;i3 yixmnlkg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows throughbdpr(nqi9u .: a 4 ohm resistor that is dissipating 36 watts ou q9pi. (d:brnf power?

  01.24: An electric heater draws 13 amperes mo/ er+j;sl(*wq ul.q of current when connected to 120 volts. If the pr;ue*+.j/mrqllwq so (ice of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately howz(drx5yw e54 llb*d(a1 ge+ge much would it cost to keep a 100W lightbulb lit continuously for 1 year at ( +5e(*d1lgbgae4le wx5rdzy a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A throulxj m2,06 dhitgh a lightbulb results in a power of 24.0 W associated with th ijm06 htd2xl,e bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of ais 70hs d,vpxu*6ydk5 family of six owns a computer rated at 500 watts in a 120 V circuit.idv h0*7,56kpxd syus If all computers 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 connected to four resistors to form a:1k un pi7b6hu x3a t-55gqsgk simple circuit as shown to thep:b ngtu-ki56gsh571ukq 3x a 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 circuit ypo ,rtm .yqfbdskr5, qa61: 8as shown to the right. 6 b.ray y,m5rtq :dsqo1f8p,k
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 arm4kx 82 3ydfdje connected as shown. With the switch open as shown in the diagram the amm 3 xd2d8jykf4meter 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 a-axj3r+ jtbvbrqcje9y fr.th84f*+ 4mmeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperfeb .948j ctrv-h3 +btj+qr f4ra xyj*es.
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 .2b -hq4pt 4e9kc3y.pto q q swkqt029yvid; vconnected as shown. With the switch opekdv9p4.st9 2q3p -oq4q e02vwqyytb;t. ki chn 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 w4.83hub:/hygu rb l-fa r us(the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, an.b:/(us 38rl-fwrbyuh4 h u gad all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the 33bya1 aytbc-rrp ; -r right with resistt3r-;ry ab-cp31r aybances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors 4ia 50kyxdts i67ar:q connected in a combination series and parallel circui y q7ia :tid56sa04xrkt 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 combinati/* to: fsjyzs(on series and parallel circuit to a voltage source. *s(/ ofjzy:st
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of t p7c tl9tjt/ace:8qz5he bulbs are identical. Which bulb /5ac87zqct:t j tep9 lwill be the brightest?

  02.21: An ideal battery, an ideal ammeter, a swi7 .4kgoe pt 9thn-x86f tagdz;tch and three resistors are connected as shown. With the switch open as shown in the diag4dz6g a9tp-tt ;n.fhk7e8gox ram 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 three resistors:ij fic bao4;0vj0z7s are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 am;0j74f vb : zs0aojiicperes.
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 re7-yheeceh.cmm x0 u7 ;sistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampe7e7eh xcum0c-m.y ;h eres.
When the switch is closed, what would be the current in the circuit?