16.09: In the circuit shown, an electric current exists in the metal resistoq)ld2s,il3 qfob5wsm1 o+ f4lr connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the direction of the electric field through the interi + lflo1ld23f,b)5owis s4qqmor of the resistor?

  98.06: When any four resistors are connected in parallel, the_________eachfmg 8ln7hi5+ m resistori8nlmhg m+7f5 is the same.

  06.33: A current through the thin filament wi7z16:mi/:vov* o onwx*gqr h rre of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because71/* q z :hxg:voorinvmr* w6o

  13.08: Some standard household lights are being re:0ur7e(dsbhpvnnlvbt0i 16 , ; kfi7splaced with LEDs. LED is the acronym for which one of the following choices? i bhfu1 r6,sbln kv;p:st7e0id 0nv(7

  05.16: A cylindrical graphite resistor has length L a4i0be8r(b;k m f7zntr3p1dhpby2e m .nd cross-sectional area A. It is to be 1pb;pzd mykie e(b0 .fh3 7bt84mr2rnplaced 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 resistor?

  98.20: Wire I and wire II are made of the same material. Wire IIr;g:rxu)i1to4* ly) t 1 b fwqkt+y.ht has twice the diameter and twice the .lqy1iuxt k;)rb 4h+wtt: *yfgrt) 1olength of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has tii,g6t .;qtv k2d 4ukiwice the diameter and half the length of wire X. If wire X has a resistance of k 4uv26 .k;qii,t gditR then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and ra q60+lmwgyz, 86 bbpgsdius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens 6wsp6 m0z by,lqgg+8bto the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter ligztw 64ztg n*t wnbp9+*ht bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb *4t*pt n 9 +zwn6bgwztproduce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The y.vl 1 v0gcz,)7mobm:.o3u gxbrkvr(length and radius . y v v:3ormc1uxv )z,.blmg70b k(rgoof 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 resgc x8q b;4l/mtistance 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 resistors is connected in series to a fourth resistor.” What is the equivalent resistance of this arrangement of four re4 gb lxmc8qt;/sistors?

  95.35: The voltmeter in the accp8g2i 2m2d j :iopgmz4y x*by9ompanying 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 voltmeter reading is most2y g zi2d 2m9x8pjg:4oyi*mbp nearly:

  97.37: Consider the compound vi djhy83y1pg ppu+. ,circuit shown to the right. The three bulbs 1, 2, ap , 3yy8upjpdg+.1 vihnd 3 - represented as resistors 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 the currej9iu(w yp*8kh nt in all three resistors is equal, which ofh(jykpi89 u*w the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed -tov;kk 4n7tsxdldwc 4v.;o w8*q *snof 5 identical light bulbs and 2 flashlight c* x84tt d;kqo -s.k7nvns;wwlvd4co* ells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simwb77pp1ozezhz9d9(9 l+4fas+ ru yb gple circuit shown where resistorzp l+hb7ode97y (ug919p4s+ azf bwz rs R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery(7q4ezbr7 zw1-drog/ufn pz , . Bulb X is brighter than bulb Y. Assume all ciwe14nr gruz(b,qfz/ 7-dop 7zrcuit elements 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 identioy*y(k:,i4 bu ijo6mrauv . 1gfied resistor in 5 seconds once kyy 6uju:br*i,1v iam(g oo4 .the circuit was closed?

  00.23: If all of the resistors in th , ( -f-cwj/i3)gz3croystjm b6jzm 3fe following simple circuit have the same re),(toz mr 3bij6-wyf3f c- sjgcjm/z3sistance, which would dissipate the greatest power?

  98.34: In the accomp.nnqu1,d8 v27:fs j.y 5twp m ibf4mnianying circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supplqs82n.t b .d,nfujn5:v imfpw7yi41my voltage V?

  97.27: Three resistors Rugq 37g 20 b+4iihxidl1, R2, and R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipatiuhgd7bgxl0i2 +4 3iqes 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to5 s:/qop:brnpukm -i - a battery. Suppose R1 has 2V across it, R p-q5- biporuk/:sm: n2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coilq2;eh27l5nkzm xc s 5poix7e/ is rated 1200 watts and 120 volts. What is the maximum value of the current under zcm5skhoxe2x /;27l5ip eq7n these conditions?

  99.23: What is the resistanc*jw) (q5tfkv1m 6jzcqe of a 60 watt lightbulb designed to operate at 120 vfj * tzw1mj5qcvk6(q )olts?

  03.09: How much current f1ys htbcpt 50aimuy- ,l78 dp(nhv6b5lows through a 4 ohm resistor that is dissipating 36 watts 1t5(bm7ndl h ytpp8 ,i vhu05-yc6sabof power?

  05.21: A household iron used to pn.kl2 b6v4acz52dln press clothes is marked "120 volt, 600 watt.” In normal use, the current in itn4 n2cl.2b zap d65klv is

  01.05: Which of the following resistances could NOT be produced by a dqk+l glbi:.i) .+e+ kfv lsx8circuit containing only thre d klekgb8 lfxl ).+s+iiq.+v:e identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resis;ie,8zc .ykzvy 8f4sajph 4s lnd.kk77x4mi5tors. Which of the following equivalent resistances CANNOT be produced ui sz44kvn4 8klhyp7i7 d,s..ymfekx8j cza;5 sing all three resistors?

  02.06: Three resistors of different -dy.gxgj e+m+values can be connected together in different configurations. If all three resim-xj gdye g++.stors 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 battery, a total power P ieka+8 / rjb0gfnd:w2,q (gy.k4zol 2 ( njgtbis 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 intern+jggnrdq./ elb0 z f io2:j28t,k4agkbyn( (w al resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connecd7yoih9ovrj5 q41,p owm-ky/ ,kys, eted in parallel, the equivalent resistance of the combination is 5Ω . Which of the v h,q d7ysp1 -orw mky9yook i,4,e5j/following statements about the resistances is correct?

  02.46: A hotplate is8 p9 iezxt.u.2icd q3epqi7;l designed such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amounc.eqq7tpd;e8 2upii9 il .z3xt 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 5yiy.5a1wdm-oc xoe )4 ohm resistor that is dissipating 36 watts of powem1c. oywei5 x)a dyo5-r?

  01.24: An electric heater draws 13 amperes of current when connected to 12u ucqqy9l6 e w iz.8zhhmgj yc2a)54240 volts. If the prjcy u) 9448me ulazyhzq gi2ch56w2q.ice of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how mu n(rl:pvtl4mkbhj 1 5 n3sx:g(ch would it cost to keep a 100W lightbulb lit continuously for 1 year5p3r: lv1(:nhbsgxnlmt j(k4 at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A throudavg5 j /,a,dn w6bsg 3)d c zf-py,ca.02fwcygh a lightbulb results in a power of 24.0 W 5jzp0v6dw dc-ba32na,f g,g.,wya/ s fcy )cdassociated with 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 coag 4 a90i +qjvb2tx7xw74jvljmputer rated at 500 watts in a 120 V circuit. If all computers are plugged intivjqbv 2tax904+x gj 7wla7j4o 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 circuitaf(asu6wqz o( 6q:1; kabzu u gvz:w038xd) js as shown to the righ8(wqua;soujk z zsw) da3(a f0b6:ugz :6x 1qvt.
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 fou.mhc th s66dc9r resistors to form a simple circuit as shown ts9hhc6md tc. 6o 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 a4chfdf521i gh:kcq*04p hwo9 b 1vdcnmmeter, a switch and three resistors are connected as shown. With the switch open as shown in the 2hch0k54c1dvc b 4i1*:dnf9 wpqfog hdiagram 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 y:qj a0 tc,p5mand three resistors are connected as shown. cyt pjq0:m5 ,aWith 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, an ideal ammeter, a switch an/mwe fnvrwb*g pmz1d;(r s;xs75 j )0vd three resistors are connected as shown. With the switch open as shown in the diagram thew1 z nsd0p;)7;5vfrjmxev b s/(wr gm* 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 equivale z 8x*a*ixjw9ant resistance? A*xia*9 8 wjxzassume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to tm x 9zluzxjm6q)1 lfftp, .7p) e05yvkhe right with resistancesqyz5 ,tmk f6 xu1fp .lx))vemj0 79pzl $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identicalg:1om,/ ydjpfdo7e a+ resistors connected in a combination series and parallel circuit to a vol1dj,ad+/7: fm gopyeotage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows .etewn9t 1b*mfive identical resistors connected in a combination series and parallel circuit to a voltage sou1te*. nbte9mwrce.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Whi,m38 b,en/lwtzncrufxy6, ,qch bulb will /fq8n,r ,u,c3lb ey, tmw6 znxbe the brightest?

  02.21: An ideal battery,o-o l.gmk*/fath4,f w p2yge: an ideal ammeter, a switch and three resistors are connected aeowolkm f /,faygh:t* 2-.pg4s 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 ammeter, a switch and three resistors are.9c . paccw)v6d.yx io connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperevc.px. wdycoi9)6.ac s.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter, a s b3*(xoac(vgugy8q )u,pr-y lwitch and three resistors are connected ubuyapo( q)(*,8r v-g gl3yxc 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?