16.09: In the circuit shown, an electric currenfs q/0u2m m1ovt exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of elem12/qfm usv0 octron 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 in parallel, the_________eacrjv ej*r/n6 1cr/.kl qh resistorn jlvrjrr*6q1./k c/e is the same.

  06.33: A current through the thinrk(w z icj((bh56hfmt8j8zop( o2w7 i filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain muc rhpw5hj 862 z( (z7tfb((kc 8imoiwjoh cooler. This happens because

  13.08: Some standard household lights are be,uslwh lld/++d+ dr6 fing replaced with LEDs. LED is the acronym for whic/su+hf,d w+ dd6ll+l rh one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-semit pmou-9l /02 :rtojctional 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 ratiot2i- j09/pm oml t:ruo of the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has twiul j11ldd3a( nrxz*k.51st0gvt o, xice the diameter and twice the length of 1r t l1lo*iud,5xk(1tajgn dsz3. x0vI. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same matethcw6p6nsxa ;80gg)x7n ij 3hrial but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y woulxwac6hx3)pg 0tj n68;g hs n7id have a resistance of

  03.23: A cylindrical resistor has length:4; zouuyd*js 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 resistance of this ms:*uz ujyo;4d aterial because of this process?

  07.27: A junior Thomas Edison wants to make a brightfp,ry i.h40npy,wqx7er light bulb. He decides to modiff,q0pn4yx7 .r hyiwp,y 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 the same materi2yw l qz.,l( -7blmkroh.7fmv al. The length and radiusl727lqrv y fh-mlkob.( , z.wm 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 txujorh(c: +ny8 ),-w xhatxo3o a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connecteh3x(w-ou8 :rh ,o atnx+ cj)xyd 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 resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internal resistancliilpik mby p s6* y01(1hy1;re 10.0 kW and the ammeter has internal resistance 25.0 o1p iykyl 1(lm0 ihi*sp r16;ybhm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the ,8maz5yp7ez5m8vnns1 a) glc compound circuit shown to the right. The three bulbs 1, 2, and 3 - represented as res 7zyn8laem mcs, 1n55 gz)8apvistors 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 electrical circuit at the righ5q1:d8f*x:ag j o kskbt. If the current in all three resistors is equal, which of the following statemea:d: qb*oxksg5 f8k j1nts must be true?

  99.37: The diagram at right repb1q 6kee f0 f2dnc9s cw,8e-yeresents a simple electric circuit composed of 5 identical light bulbykn06eccdfe b qs91e2- ef8,w s 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 simp(p d(mm aw jr:1zw6sg8le circuit shown where regs(rm8w:6w zdm(ja p1sistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in vfkkgcc9.rsxf (; 1 w: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 o:gc( k1c.srk;x vf fw9ne of the following choices best represents what is observed?

  06.34: How many coulombsfc sd;r:t .8wx will pass through the identified resistor in 5 seconds once the circuit was closesr .8;tf cd:wxd?

  00.23: If all of the resistors t fixx94beg-f3a + /bf a3z)ne in the following simple circuit have the same resistance, which would dissipate thx ben94x ztfi a/)a f3+-fgeb3e greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.*rwv/c 2xd w9f0 Ω resistor is 1.0 A. What is the po9 r/wwdvf2*c xwer supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. Supji -sv9wj6lg7 j*p7:s pb ay5ypose R1 carries a current of 2.0 A, R2 has a resistanp6wjl7* b:7sysj a5yp jgvi 9-ce of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1,+ce3t. g;4 +dmmwnnp,5w ree g R2 andR3 are connected in parallel to a battery. Suppose R1 has 2Vngd5p+w m3 nmcw+,rge ;4te e. across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts.tdle0j c dcnb 2cv0a*t+:o1d6 What is the maximum value of the current under*t n c1tjcdbod2e+6vd0c l0:a these conditions?

  99.23: What is the resistance of a 60 watnfrew)i8cpcyq49i e75u- dx9 t lightbulb designed to operate at 120 v8)r 7ui 49d9qxcypfc5 ewine- olts?

  03.09: How much current flows throuoda a ik k) (+e(c-pmmc8*h.wggh a 4 ohm resistor that is dissipating 36 watts of igk. o+c w) 8h(k- aadec*(mmppower?

  05.21: A household iron usedmykmr ,v5j. ;n to press clothes is marked "120 volt, 600 watt.” In normal use, the current inr,j my;mn 5kv. it is

  01.05: Which of the following resistances9i,neb-fd e2tdqg)n, could NOT be produced by a circuit containing only three identicafi9gnn,)d dqt-2 b,eel 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equiv0kug 43yn 9p)mod q 8y*zo7q wa3nguk;alent resistances CANNOT be producu 3)ngynymo;g*3p8 94 0qqwo kkad7 uzed using all three resistors?

  02.06: Three resistors of different values canpi yg:,cdxc d)e0 u mcdu07:3u be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be producec y, ucm7i)3eud 0xgd:0upd:cd?

  97.35: When a single resistor is cozt0hvs j.(tc)wczt( 5 nnected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if nsjh( .twztc )z vt(0c5 identical 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 R2, are connected in paraohjz,2ge3 as/xoq*es*t ( ky 5llel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistance/2*zesxg esjoh k3y,qo* a (t5s is correct?

  02.46: A hotplate is designed such that i )l,fbg3dd ka;),lzcot has a resistance of 12Ω when operating at 120 volts. What is the mini z)lg o;db,)fkc d3l,amum 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 resistor t dqj,nawh/i qd/)h*c2p n9uo 3hat is dissipating 36 watts o9/wd* oui )a,hnq dp/3 nj2hcqf power?

  01.24: An electric heater drawsbd8 axswnrdj( 44j,n7 13 amperes of current when connected to 120 volts. ( rnd,dwn4 b78j x4sjaIf the price 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 cost to kx-+vpb m,rld(i7it)u z u-5 dyeep a 100W lightbulb lit continuously for 1 year at a ra vdrl(puud5t +m-z)7b-i,yix te of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A thr * v;iip. rdso;2*b pe)krzr5gough a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lightsi5b2ip rr)*g;r o; *k p.dezvbulb?

  01.10: Each member of a family of six owns a computer rated at 50-ehfz+unf+vhwq088 nd(yw 9 a0 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the0ufq yv8d h8 +na +w-(hfnez9w maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is conzw7d* (vi4 e3aw(too fnected to four resistors to form a simple circuit as s 4o 3aof(z*vwi(we d7thown 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 resistors to form a simpy+m 2ki /0zt wqdo3k,jle circuit as shot3zo/ j 2+0kmqkwd,y iwn 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, a switch and three resis- 28 wa,o-eov 69 6bwezpl:sxwl fn-uru/;wictors are connected as showxlnw-fw,8w obe acr w26/ oup ;u9e6zvs-:i 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 r2 bvs;sjrb0 (switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads rsrj(; bs2 0vb2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, anug1z5(vdxyrl5bt 9 6 x ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.6y xxr 5 tv(zgbul1d95
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 resistan5a2syly cj -q+g/erxv7b-ug/, nt qc)ce? Assume that all wires are ideal, the battery has no internal resistance, ac//vjyn7qtey qg5-2l b r ), xuag+s-cnd all three resistors have identical resistance R.

  09.07: The equivalent mzgpe 2 sgi4q4/*msbp:c1m h2resistance of the circuit shown to the right with resistance*z14 s mb2ihp4g2m/empgcsq:s $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identiccvige: g;7 *yhfx75c sal resistors connected in a combination series and parallel circuit tvsg:cy5 7; *xhci fg7eo a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fig 36gyvw*b qyw21pp m3 k1ddp7ve identical resistors connected in a combination series and parallel6 q1m1y2p 73gdkppvyw w*bg3d circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, an9 lmyzs(ey; 1ll of the bulbs are identical. Which bulb will be the bryzy1(9 ne lm;sightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors aaure9fdwr ng /0c:)+4vo) ci tre connected as shown r)/9ofduw c:)+g ive04n actr. 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 ammete,.rmm , .bgnlqr, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter readrblgm..m , ,nqs 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 resistozcmp8d)3o j;brs are connected as shown. With the switch open as shown in the diab3 ;od zjcpm)8gram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?