16.09: In the circuit shown, an electric ciut.) / ;fvkkl.-oy 0hd/dfej7 (qt 2kfobbi9urrent exists in the metal resistor connected to the battery. Which one of the following cdkjk t.iyvf// e fo-i2ot0k9f (;. lbhdq7)bu hoices 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 connecte jk530 5ri df3nv0fo n8w0yabkd in parallel, the_________each resistorj8vk0b3owfa5005ry dn 3knfi is the same.

  06.33: A current through the thin filament wire of a ligh9+i; xld h+z.z ,x 4 atq9gfi4ds/jubgtbulb causes the filament to become white hot, while thehq,lx9 +ji4 d/a;.z+zg x94ib fgu tsd larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED l ;pbgbb,4tm 6vdxv 90is the acronym for which one of the following cvlbtbm, 0 g ;46pv9xdbhoices?

  05.16: A cylindrical graphi+3tyw ) foi+95 mcvc 65;c tgklvpe).7 bdmasote 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 lengthovtwc6.5lg+ eop 7avf +d cm;9)ckyst)i 3b5 m 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 mat(pd +1cloxufqj7o076 x buw; rerial. Wire II has twice the diameter and twice the length of I. If +jx7 b 0x(uwo7ufr ;odpl6q c1I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twifq(ykm xe ),fz +g(+dmce the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a resistg (+ +md emf)xfzk(yq,ance of

  03.23: A cylindrical resiz1 cj2fqx0b ;z1a5a9s tx;zzqstor has length L and radius r. This piece of material is then drawn so that it is a cylinder wit;xx z ztc j;qa51zb1faz092qs h new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a q9 p+yvqx p6q hu:de3)brighter light bulb. He decides to modifyp:y p6qv hdq +xqe)9u3 the filament. How should the filament 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 u 11lx3moh:/ 0-b tygaj8odf dthe same material. The length and radius of each r1h tdbd1 la j o/f8mugx30-y:oesistor 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 resga3e8qj:m7 pxia 3 zf1istance 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 to1 fzx 3j3:geq pmi7a8a 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 accompangr/jn2k :c6-wm lf6jt ying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeternk66ml 2 g/fcjt:-jwr reading is most nearly:

  97.37: Consider the compound circuit s+ (:mfk0fn 3yiaxib5zexawzf+8 xl -1hown to the right. The three bulbs 1, 2, and 3 - represented as resistors in tnf i(81++ iak 0fl:bxx-5zwezym3a fx he 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 circuit at the right. If the current in all 46p flrehu14l three resistors is equal, which of the follor4 ll4u1pef h6wing statements must be true?

  99.37: The diagram at right represents a simple electric circuit composj-q 5g.g6ddh 5sdf)goed of 5 identical light bulbs and 2 flashlight cells. Which j d-sgogq.h) g5d5d6fbulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is N8 j8o.iy9dsqmb 1qwu2z3g b88ymhi v/OT true concerning the simple circuit shown where resistors R1 qvidm.bh89zo/w31yb8j gy2s8mi8qu , R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andx *e9c lp6bq4; nos/jtY are 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 with each other to the same battery, which one of the follobsx4 p;j9l*nt6e/q co wing choices best represents what is observed?

  06.34: How many coulombs will pass through x 0.-rz,2a i+tadvvkl the identified resistor in 5 seconds oxkt lav .0z+-r ,avdi2nce the circuit was closed?

  00.23: If all of the resistors in the following ;ma;o 4wwfit 4simple circuit have the same resistance, which would dissipate the;4 f;awi mow4t greatest power?

  98.34: In the accompanying circuit diagram, the current through rj *zytbqiu 2vs.t(qh9*55as the 6.0 Ω resistor is 1.0 A. Whhqr ts5ay*. s592vtjzuiq*( b at is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. Sr-/ ny+5nh jnruppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltayr n-jr/n5+hn ge across R3?

  99.40: Three different resiq3 f x mg5u4f-5j06gmanoug9a0f 4ijkstors 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 tk6 a5ig4o590 jmfa3fnugjg4x-0 mfq uhe current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. Whatn(c* p+*i p4 vx7chpor is the maximum value of the current under these con c *h7(x4o+vpp*c ipnrditions?

  99.23: What is the resistance of a 60h+ajb)eqr7 ir3e 5 ,6ha q)itp watt lightbulb designed to operate at 120 volts7t,qj rehpi) 3 r a6q5i+aheb)?

  03.09: How much current flows through a 4 ohm resistor that iqc,o, .ky /dbhfoq5s3s dissipating 36 wa.o,s ykhfq, c o/3db5qtts of power?

  05.21: A household iron used to press clothes is marked "120sbt mpq56ko*n0*)r rf volt, 600 watt.” In normal use, the current ipk)m*orqt s6 *f50rnb n it is

  01.05: Which of the following resistances could NOT be produced6k yb+2gqzup2 by a circuit containing only three identic2k b+ 26qzyugpal 6Ω resistors?

  94.37: You are given three 1j i25hua5lnou s9(tca g wq+ze-550id.0 Ω resistors. Which of the following equivalent resistances i-wiq a0c ue55sgz+ olua5th2j9dn5(CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together in t b 5;x(ds5v2hz7e dosdifferent 5tbe hsz2xv 5 7sd;(odconfigurations. 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 batteco d ,+5i6yv8ue ke*sery, a total power P is dissipated in the circuit. How much total power is dissi8v,yks+d ce6oieu5e*pated in a circuit if n identical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, havig*ngt0/ u2bzqng resistance R1 and R2, are connected in parallel, the equivalengz*bn20tug /q t resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is desi:qp /:9rm d*qtbd5ro cgned such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.db/95r pt*c:d m qrqo: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 dissipb+lkbj-d(z5sj+ch8 dating 36 watts of cd hb(zb5j-dj+s+l 8k power?

  01.24: An electric heater draws 13 amperes of current when connected bi1yz xp:u8v 3xlm4ok6 em0 m1to 120 volts. If the price of elect84emmki1ml b:0u6xvxz o1py3ricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would it co 2 gbq8fy.. omt*uq3g-qfa(3m hmg(v tst to keep a 100W lightbulb lit continuously for 1 year at a rggb8.(-q*q g( 3maomq tv 2mfy3ufh.tate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulnti0r-sxq lz(t- hx9 k+e rzrdz*-7 g.hdh6o3b results in a power of 24.0 W associated withrlz-s7+ h 6n0xqe o-thx9* -(kdr tz.d hg3irz the bulb. Which one of the 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 itma 39 efb1h:ch)o;fv n a 120 V circuit. If all computers are pluggetv com:9bfhfh3ae 1;) d 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 simple c3t-kz87jplh, ( drs vltjpe;, ircuit as s (7p zkt-,8eprjhv 3stll d;,jhown to 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 connected to four resiscirlgzmtf)3ee2xb gt ,24f p v1x xi 352c*n3ftors to form a simple circuit as show5t,x2 lr3tbxcizp1fx4fg)ng m* ev2 3fc2e3in 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 ideal ammeter, jh+v-h fg3n4 ea switch and three resistors are connected as shown. With the s-4hg3nfh+j e vwitch 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 ideal ammeter, a switch ans nnh.sp. *tht,z26)m+kmj u td three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. hzp)sntj,u h.6ttn2k.+ ms *m
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an idlzf63x7b*c b neal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amper6blfbc *7nz3x es.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the right, what is y, nqa,fh9 hw6the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistor,h6h wafqn 9,ys have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the y5+nb2 q vbk/i right with resikbq+yi52 vnb/stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five5 94,9cpewo6 admgpjm identical resistors connected in a combination series and parallel circuit to a4o, emw5 9gpm9p6 acdj voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in kpi j9.wqi63zm pb ;t/a combination series and parallel circuit to a voltage source.i iqk /p wt;36.mbjz9p
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the l2huw /.fae54,:+p njndrm e qbulbs are identical. Which bulb will b5nq uhj l,r.:n/d+w2e4 emp fae the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors atiyrui(9nac xe:.f h q0o7o ym 8rq)jqo003+rre connected as shown. With the s03irje 0m+9:7 tay o.oqh uirox (fy 8n0rcqq)witch 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 zydnx(z41 t70u*u2p00; vrb b os2tpnj1mzkgideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amper1vju0 ;*r0nmpk 24dyx2uozz 7n(tt1 spbg z0bes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter, a swi6;)xb 4h-u*zcd*bhuud kud b4 tch and three resistors are connected as shown. With the switch open as shown in th*dh z64cb;d) bhxu4dk*-buu u e diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?