16.09: In the circuit shown, an electric current ex/ i+bmy /ctpf(ists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor /+ it c(mb/fpyand the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are c fxm2)n5g0ozpg9 bnb q;z/ ib2onnected in parallel, the_________each resistor9fmg 2 zbqz5 xp ogi0)b;bn2n/ is the same.

  06.33: A current through the thin filament 1,f7zjsmj fjyt+r(2 u wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much coo+j rfus2jymj 7,z1t f(ler. This happens because

  13.08: Some standard household lights a. doeqr;0rytq75 dm)kre being replaced with LEDs. LED is the acronym for whicketydo 7 m qr;0r.5dq)h one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional are)zo .n;y ;dwcmx0myu:a A. It is to be placed into a circuit, but it first must be cut in ha 0yc;uxo;ydmw:z) n.mlf 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 same materiaj1dtr8 .luhz0 ,q.w/ q k/cwutl. Wire II has twice the diameter and twice the length of I.jq uwtth /./.c 1w,d80lrq kuz If I has resistance R, II has resistance

  99.31: Wire Y is made of ti 8s(oc*d +rw pu1si-qhe same material but has twice the diameter and half the length of wire X. If wire X has a ressiqd 8pi1o *wru-c+s( istance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor r;k8ke7 tyk3 gyvh+a0 has length L and radius r. This piece of material is then drawn so that it is a cylinder a 0 ;ye87hgkvykrt3k+ with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to makqf n2a*6ziz ;ke a brighter light bulb. He decides to modify the filament. How shouldz af2*z6 qn;ik the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical reside2qce1kp8c qu 3t , 9didz1t.stors are made of the same material. The length and radius ekt1c ,3ddcequ zit2p198 .dqof 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 joa1bk . .;t rypoy7a g/8rrz:of resistance 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 to a third resistor. This set of three resi/t:rp.gj by r az1or78y;koa .stors 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 accompal9p:l k/:lknv :/fo x8hj8 )9xr nnpqfnying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The amme:nf )okvp:l: q/xn 98fh/9kp nl8lx rjter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the* ce7n 3:fqga 0sb:oghg18innt0gc1 u right. The three bulbs 1, 2, and 3 - represented as re n*7g1 entbqg u3 81f:g0soccghn:ia0 sistors 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 right. If /+a4 0twscsbw the current in all three resistors is equal, which of the following statemeab0s4t sww +c/nts must be true?

  99.37: The diagram at right represenz2l0:pm.,v 1 n9 yvs e,c vosofogi/(ots a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (oroio 2:ov l( n/zc,pvvy1fo0sm . sg9,e bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerpof:- i,s tlnw7m qa52xl3 vs0ning the simple circuiamnl pfo7-:,i 5s2qxvw s0tl3t shown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in ser(9 bpgb4 niw6xies to a battery. Bulb X is brighter than bulb Y. Assume all circuit elem6p bg4bw( 9inxents are ideal. 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 3ix rf7*9qbtw identified resistor in 5 seconds once the circuiqbrf97wti3* x t was closed?

  00.23: If all of the resistors in the following simple circuit have the jn3q(2pzr yfu ;ouv7*j4ng 1z same resistance, which would dissipa 7urju j z3fp *nz12ygv;(nq4ote the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 *k 5yhlduww h( 2ru49qΩ resistor is 1.0 A. What is the power su* l49(wyhk5duq uwrh 2pply voltage V?

  97.27: Three resistors R1, R2, and R3 are conn5zvkn8c*vb u ml8 zt8y( hb)rdob-8o+ected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates dmz crk(onb)zyuo8bl8 b8v- v85h*t + 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors fz0sil jmmw) q)qlj:6.my zp9 k9q-g(R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V q )6qm-. l g(pmm 9ys0ik)jfwqzj:zl9 across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 gp ,6qxu)t/xuwatts and 120 volts. What is the maximum value of the current un uu) ,tpqx/gx6der these conditions?

  99.23: What is the resistance of a 60h+68o k6scwh(qlhu2 l watt lightbulb designed to operate at 120 +oc lwlh (6uh28k h6sqvolts?

  03.09: How much current flows through a 4 ohm b hbx0kik2( mzi 31r2wresistor that is dissipating 36 watts of 3zkm2bb x(0 kh 1wrii2power?

  05.21: A household iron used to press clothes is mr7m5i9ay3) m, b wsigdarked "120 volt, 600 watt.” In normal use, the currewyd) ais3b, i75rmg9mnt in it is

  01.05: Which of the following resistances could N-4(znj x(e eagOT be produced by a circuit containing only three identical ea-nj 4zxe(g( 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the f.zw3 70stwm cvvym- 6at h.*htollowing equivalent wmh*7 m3y .s z0-wavt6v. hcttresistances CANNOT be produced using all three resistors?

  02.06: Three resistors of dvu ec 1(4od uk:tp3j7vifferent values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total ree14u(c3pdtv v o:uk7j sistance can be produced?

  97.35: When a single resistor is connected to a battery, a totax a1 aj8s1 )( fvxksevv8dn;lu:+4als 9m ccv5l power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in 5d vnx1lcl)8v aa uajs:;f k m(ssv ce+1v4x98series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistoqf9u cs bi:)-m usb 4dnl; ycs3u*6b4srs, having resistance R1 and R2, are connected in parallel, the equivalent resistance of thbl4;u 9y6qsssbdu n b:c3iu- cmfs 4)*e combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance or k3c..gma bfkvha4d4p: *m( im2w+ij f 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg (ivfakjbr .i2*gd k4w4mh a.p:c+m 3m of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current kxssm9r3(x97 q8pkukflows through a 4 ohm resistor that is dissipating 36 watts of pos(7rsq3 x9kx kpmk u98wer?

  01.24: An electric heater draws q6 ctk fp bh3c h0vi;ce)mm/2+13 amperes of current when connected to 120 volts. If ipqm )k0 /v62;cehhbmftc 3c+ 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 keep a 100W lightbulb l59p 5 4km wm-k(kdf )qho58n wksuu+geit continuously for 1 -wdokpehkknwg)( q 59k8 u455f+ umsmyear at a rate of $0.10/(kW.hr) ?

  12.09: A constant cu o sva4ibda805a5x9s jrrent of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the iad5 s s9b4v8a50 jxaofollowing choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 wato79 fyqgyi5 m:ts 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 can be operating at the sameig5y9m oy qf:7time?

  03.16: A 9-volt battery is con8 941xga4jkxg dw s4+ osvww-bnz3kp +nected to four resistors to form a simple circuit as shogb waz9nwpsj8owkx4v1 +k4 -3xg4+sd wn 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 simple ac 9wuwli.ie 551hh,zcircuit as shown to thc5 lh i wiwhz5,9.ue1ae 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 resisvl45i.be s+19tzya adtors are connectedaave4 1tzbl9is5y+ . d as shown. 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 ammeteohcz2g7fk.g1u7 tua9 r, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter read uokc29tzhug1 .a77fgs 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammekcw*vjp(z6(zpu rx ) +ter, a switch and three resistors are connected as shown. With the switch open as shown in thex+ c )z pk6*wrz(vj(pu 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 equit*q8frgr hyx5n qu0pmj) */7w valent resistance? Assume that all wires are ijy )n5/frx08 mq*h w tp7rgu*qdeal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistancbtzfx r9e- d3/8 )jksoo8q ct:e of the circuit shown to the right with resiso 8q8-ot 3ezfrdbxk :)/ sj9tctances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistob4c9 bdmsi +j7m9a c5wni3a .grs connected in a combination series and parallib+7mc j 9ncg3b5dimwa4s.a 9el circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fiv9d:as flle+8wr9gxp6 cut n+g3r ;n m/e identical resistors connected in a combination series and parallel c98w;+lnget+pnx g as3 r l:m6/udrfc9ircuit 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 g4aiq4n s . jp0x5y4dsxoe k;u5sa20xidentical. Which bulb will be the ko02a 4qeas0.p guis; 5xnsxy4j5x4 dbrightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors 3vtqq (x4-ri4lf mh ji zs1zs5:w og/2are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0izsf2zim/ :tw -4qv3(jx ohlgqr15 s4 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 7h yrq, b) ,6luytdv )3geo7x ;jvj1bsswitch and three resistors are connected as shown. With the switch openqv 7o7d 3vrytg sx6buj1ylbh),,e;j) 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+mksi liuup 8k3 +f-r/ three resistors are connected as shown. Witrkpim+ksl8 -/fu3+ iuh 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?