16.09: In the circuit shown, an electric current exists in the meta0y.3 asbs-8b-pbr9xfl lu qb3l resistor connected to the battery. Which one of the following choices best des p-l 0ab.y 33f -rulbxss8b9qbcribes 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 connected 4vh 33nub nl3kin parallel, the_________each resistor i34k vuhn3 3nlbs the same.

  06.33: A current through the thin filament wire of a lightbmrtuy)uly i09v cr9tb3)zui il * *8n1ulb causes the filamenty9830imnruutr *izl1iv9l )uc* t yb) to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs.dbo y1rn 25l8d LED is the a285 no1ryblddcronym for which one of the following choices?

  05.16: A cylindrical gra gy0mm0 r 7bc8rso4bj4phite 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 m0mb7 oj48y 04grcrb sthe new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the e3as4jidxuor 3 + f(2dyg9 .)qkczu4osame material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has resiqdojfx3ue.)z9ik g4a4o c32dr u (+ysstance

  99.31: Wire Y is madea8f )ofig-ia6 8rj /mc of the same material but has twice the diameter and half the length o6ma/cj8f af8orgii-) f wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has w;a,-z lhjlsv :k ar,bt ;;2aglength 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 resistanc lg v2alskrb ;j;h,a-t; ,zw:ae of this material because of this process?

  07.27: A junior Thomas Edison w )8wxcuj4 n3fmants to make a brighter light bulb. He decides to modify the filament. How should 43m)8wxjf unc 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 the 34 s7tmgqw6r msame material. The length and radr43q mgw m7s6tius 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 resistance R, are connected* jhi*e)tawba*d , st(o:e/sm 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 resist*)o (s :,wimatt*a d*be/e hjsor. 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 themoqkyhu8pk4c :ic-7.nf/l n. accompanying circuit diagram has internal resistance 10.0 kopu f8. qnn:h i4lmcc /-y7kk.W and 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 compound circuit shmb )u/x atqk;3own to the right. The three bulbs 1, 2, and 3 - represented as resistors in the /bx3)matq;ku 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 7iidn 7w6bvqi5a17bw three resistors is equal, which of the fol 677wiivb1 q75wdnaiblowing statements must be true?

  99.37: The diagram at right represents a simple electric ci-7,8ps hnctvng* e1xu rcuit composed of 5 idt g n1svu hpxn,-7c8*eentical light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple cijutgs/pbt9i7r; 9* y gvziq-a- sjv;9 rcuit shown where resistors R1, R2 and R3 are have equal resistaazj9; vs -i-9u;ygjtqg7 psb* iv/r9t nces?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb zttf6tmr , ji-;i;rf0a(/lv h X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X a( r;l;hmf/za,t 0j6 itvitr f-ndY 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 co v8+z n/+dv+enk 6mo(iqhixxx18 (psgulombs will pass through the identified resistor in 5 seconds oncez ed n+m(q 16(io+ vs/ xhnik8gx+vxp8 the circuit was closed?

  00.23: If all of the resistoyu+7b 1zt8ntzcuj1)a rs in the following simple circuit have the same resistance, which would dis+78z )1 yatctn1uzbjusipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 r8j+6 x5t/u fw55wi d+:ghip yszkse* Ω resistor is 1.0 A. What is the power supply vz56*s++dsyrt5wf pei8kjh 5wu:g/i x oltage V?

  97.27: Three resistors R1, R2, and R3 are connected yh9 d 5+xuljpo.5x(zzin series to a battery. Suppos5 ujo59ypx.+(dhzlxz e 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 voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel.)wt5t . kw )*gambgwv to a battery. Suppose R1 hasv.w gg)ab5mwwt*kt .) 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1x pa fh2w0s8 vwh8jyp v+3h4p;hn0+eu200 watts and 120 volts. What is the maximum value of the current u0hv f+3v2e 8n h h8;spwhya4wjxp +p0under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to opefc m4qi:c;wf9rate at 120 volt9f4cqw:i;m cf s?

  03.09: How much current flows through a a 6l*ms u) *j1:kth, hyotyvz;4 ohm resistor that is dissipating 36 watts of )*1hta ;t,svjlo: yu6 m*kzhypower?

  05.21: A household iron used to vq*fs+62.utum wdlo ,4 iewzu 9.qgg/ press clothes is marked "120 volt, 600 watt.” Inmdf +w, u/q.i6sg9qzu o4vteg2 ulw.* normal use, the current in it is

  01.05: Which of the following reqot ,q4 (zbwk88f:u0v5 s fh/ry3cdlr sistances could NOT be produced by a circuit contain hf3 r/blqkrwoq(8: dsv f,z4c85uyt 0ing only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors5nv fb29bizim/b 0ow cc49b*w. Which of the following equivalent resistances CANNOT be produced9in/2c z*v o0bb ci9 5bmw4fbw using all three resistors?

  02.06: Three resistors off5tek-wsga)2ogukke :k1p) hc )nj./ different values can be connected together in different configurations. If all three resistors arekh) e)g tk g:-ce1.unkp)25/a skfoj w used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resist-t(3wgrb34vq e --fs(unmmdm zoby9 7or 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? Assumes4bb-d-mgo7uyt(3-3v nrz( mfq mw9e the internal resistance of the battery is zero.

  96.16: When two resistors, havingg3(gbr x t 0(mslems:;sw rp3v:/ yx7b resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statemen sbsm3s0: : lgt/e (pry7(vwxr b3xmg;ts about the resistances is correct?

  02.46: A hotplate is designed such that it hasy)wfu56( icj w a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time )y(fw w6cuj5i 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 resistor thatetcd f4f2 t3v7 is dissipating 36 watts of power?fde74c 3v ft2t

  01.24: An electric heater draws 13 amperes of current when connec( hi26zl nal 93xspm/kted to 120 volts. If the price of emshix 9p(k2 6la3z/ln lectricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much wob uzk.h9(dw2oho /14gu eg*c kuld it cost to keep a 100W lightbulb lit continuously for 1 year at a rate kgw2z9 4bu/k1*ou.cdo(e g hh of $0.10/(kW.hr) ?

  12.09: A constant currek tk9uc3qz7c.1e2g3 -d vapgmnt of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of thez7v-gmpaqc3k1k39 cgeu.dt 2 following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts6y9b; tej 0bfsp p5e-g2v8 bti in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the maximum numfb st6g82b b5i0 pt pvj-;ee9yber of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four f ;qu0,0wuuvm resistors to form a simple circuit as sh fvuu0q mw;u,0own 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 cj;n;2 svx g*gpl4u,* dd-jipis connected to four resistors to form a simple circuit as shown to,g dulc**nsv;xgdj2;j4- i p p 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 idbnl)i,6yym( 7:xhwmmina+vj5/)g ef eal ammeter, a switch and three resistors are connected as showimy)mixh:g5nfjw+/ybev a,nm67 ( l) n. 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 ideal ammeter, a sw rg9l,xtxox* -itch and three resistors are connected as shown. With the switch open as shown in the diagram ttgxr-xo, 9xl*he 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 res;l q+xu;-e- enpvns p;istors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.ev;slp-nun q-+e;x;p 0 amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuix1* 1ukzfet0k(e d9:p.hkwyki+q w ( it shown to the right, what is the equivalent resistance? Assume that all wiresz. py(: q+tu(0i9 i dk1wwhxe1*f ekkk are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistanz;u;j bspxq 32jg av62ce of the circuit shown to the right with resistance2 vx2ab;suj6p; gjqz 3s $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five dpwq39 moc i26identical resistors connected in a combination series and parallel circq6wo d92 mpci3uit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows q0r rct5(v4lhfive identical resistors connected in a combination series and par0c(l rh rv4qt5allel 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 ideh-si1 jzqvqmh;/ aj3d)w n+,sntical. Which bulb;-i1qj)h +mz sq3/jvs a,wnhd will be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and t umcr01 xp.pj4hree resistors are connected as shown. With the switch open as shown in the diagram the ammep4.mprux cj0 1ter 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 rrhsf 9gn89 /lammeter, a switch and three resistors are connec lr 9fr9/8hsngted 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, au5, x +yr,ubbpob+;fb naovm;d3 0x7zn ideal ammeter, a switch and three resistors are conneb; 3x vzorb0;apom +n+u dbu5yfb,, 7xcted 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?