16.09: In the circuit shown, an electric current exists in the metal resistor n6lc9k t hjv:n*i wqj548wxv-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 elewivx 8cwh* v:9-l4n 5tkj6 qjnctric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_________eahufay06b xh3c .ed 3x+ch resistor is the same.xdx. 6aeucf0hy b33h+

  06.33: A current through the thin filament wire of a lightbulb causes the *d0xd/8h q g 7a+*y0akc 3st/ybavhdufilament to become white hot, while the larger wire yd0huc/7ks/a+8ba *x*03 agdhdvtyq s connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is t.px;. )hnw agj( tp00hg f(te1bp8oze he acronym for which one of the foltx(p8g0z.b e0hp.(jp )eg nw1;f a tholowing choices?

  05.16: A cylindrical graphitj(nv/zm +n5lbn s ,i;he resistor has length L and cross-sectional area A. It is to be pla(/ij nn+n;shl mvb,z 5ced 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 II yd crnii - tvf,/lsuhu9s8xl1 71o(0rhas twice the diameter and twice lrc xsfo8i/-1, hir7ntv1us( 0ydl9u the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material bug8e:,lk0) x ytda) fedt has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y w)ddfyle80a xktg, e) :ould have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece 7twbfz.n8a-3e ugpq8 of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material becauz g- be3n7pt q8fwu.a8se of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. i-ljts( hxbwk 52d(8 6hygowm4ft* i:He decides to modify the filament. How should the filament of a lightbul5d:jgh4y -(6moilt2(* x8fkw wthsibb 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 material. The ley)h7oe sc .vix/ k7:ajngth and radius of each resistoj.7haxvy 7 o/):ksc ier 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 to a battery in the f+pb/ha nau0tt (r7 w,jollowing way: “Two resistors are connectej upra+ 7hbnta/ 0(,wtd 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 resistors?

  95.35: The voltmeter in the accompanying circuit xi-5v/cwm dt 1diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammec ti/ xwvmd51-ter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compoun qs5rg 0ew)9bjmsks( -d circuit shown to the right. The three bulbs 1, 2, and 3 - represented as resistors in the diagrakwb)g j-e smq s(r059sm
- 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 electr/g8 sx) 45we e(tpwfpfical circuit at the right. If the current in all thpt/e gx pw8sfew4)5 f(ree resistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple eleo4ba )blbhu8mp- e1/nctric circuit composed of 5 identical light bulbs and 2 flashlight cello8pbuba4bml -1/nh) e s. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple j6ut-j1wqfb/ circuit shown where resistors R1, R2 and R3 are have equal resiswbjtf/1- q u6jtances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is brd 6mbtitme./bp2*gh *yv+ 8jgighter than bulb bpet8i+2jy.g6mmvgthb / * *dY. 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 following choices best represents what is observed?

  06.34: How many coulombs will pass through the identih- )immy n9 irzoio,2;fied resistor in 5 seo, riny9 o)hm2z-ii m;conds once the circuit was closed?

  00.23: If all of the resistors in the foll 1)j:i45xgq0e ) w cffvgc*gsiowing simple circuit have the same resistance, which would dissipate th) 0:gx cgew1cqfi5*j vs4gif )e greatest power?

  98.34: In the accompanying circuit diagram, the cur qc 3y(zm 1slrosx0h;*rent through the 6.0 Ω resistor is 1.0 A. What is the power supply v*sl1 3schromqz 0x;y(oltage V?

  97.27: Three resisto z 70 yel(zu7j5smfzk2rs R1, 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 dissipates 6.0 W of power. Wha7ez0uk z5 7 2zmfj(ylst is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are.1;b uvef1m s d: l7)wx30rhx1uz uqan connected in parallel to a battery. Suppose R1 has 2V across it, 1r;3x )z qnal :wudm1107ub.xseuhf v R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is ram-ka ht+ z ux(4yv *xp0a+g,f8n/heo kted 1200 watts and 120 volts. What is the maximum value of the current under these condition -a,vxx0g*hf+ozu8h( ntk ak4e+py/ms?

  99.23: What is the resistance of a 60 watt lightbulb designed to1) 0lvjs,llyc operate at 120 volcv,l)0sj1 ly lts?

  03.09: How much current flows through a 4 ohm resisto/fa3hrnu.(8n y)sw.z xy yn: cr that is dissipating 36 watts of powesyh rc3:y)z.u(n .f /n8nx awyr?

  05.21: A household iron used to press clothes is marked "120 volt, 600 waz5 s7k: mpf0wgtt.” In nor w:gk0f5pm 7szmal use, the current in it is

  01.05: Which of the fdj j-q;a8s+pi ollowing resistances could NOT be produced by a circuit containing only three identical qa+jsp-;8d ji6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the followi(.sx vapyq 4m uyovow;p-;; l(ng equivalent resistances CANNOT be produced using all three asux;(op4;w qmy y.- (lv; povresistors?

  02.06: Three resistors of different values can be connected togezvt/ogfpv8 h2l*z3qhm 0 g+ v)ther in different configurations. If all three resistors are used in af v /gzv02 o)hqp8mhlvtz +3g* circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, a cz((p-k;f. q nzv3wrgwk;:de total power P is dissipated in the circuit.;ww-(v:3ke;c nfrqz zkgp( .d How much total power is dissipated 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, having resistance R1 and R2, are ckctus7p965h5 6k 2+r 6xo5htkgm gfhmonnected in parallel, the equivalent resistance of the combination is 5Ω 9 k6 pkgur2xk tth6cho5 6+5f7shg5mm . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω whqa:av)hj 506 :avu cwuen operating at 120 volts. h) 5q:vawaa v06jucu:What is the minimum 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 thf.., z*cm 8l3qfqs v8jtb l,lhrough a 4 ohm resistor that is dissipating 36 wattt 3h,q.*ffcs88, jzql.lblvms of power?

  01.24: An electric heater draws 13 ampere-2wxrzx refv,pyiv7i3 )x2 2xs of current when connected to 120 volts. If tx7y 2r,)xiz3px2 ewx ir- f2vvhe 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 14zxj ch1mkx1 400W lightbulb lit continuously for 1 hxm4 1z c1xj4kyear at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a 6a42nzy/ s -ve +zobyhlightbulb results in a power of 24.0 W associated with the bulb. Which one of the following /eh46za-n+y v ybzos2choices best represents the resistance of the lightbulb?

  01.10: Each member of a famil0we6xb8s,wf yy of six owns a computer rated at 500 watts in a 120 V circuitw s6xfweby,08 . 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 sametime?

  03.16: A 9-volt battr (6sgw/ glihms-c z,,ery is connected to four resistors to form a simple circuit as sc6 g, wz/gri(,hmssl- hown 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 resistor4 b8v4u 6yhyyj; 6wpfqs to form a simple circuit as huy 4f; 8jpwyybv64q6 shown 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 anzv;nib drj/) /d three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amj/ ;dnzvb)r/ iperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ammeteqb32-m0 dopjk8o5y xe 0is cj/ yusn(:r, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.-/m50sdp(qs 38ye :onkjux oib0 j2cy 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 re,o yqz6nu:7 e)vf b,sjsistors are connected as shown. With the switch open as sho:vjbyuf,qoe 7 6)sz ,nwn in the 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 t2- lzt zu7 k*(xbh-kj +hgy0nvhe right, what is the equivalent resistance? Assume 7+(uxk2 hb-t0znlg*y -j zhkv 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 84 w v-al:ah nhw8)yrbshown to the right with resistance8w l- h8 vbry:aaw4hn)s $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected ir9 izt6su2jko(v ;zt(g4 ;uoi n a combination seriv zr 9t2;o(zg4 uistuj6o ki;(es and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connecte b (kr-:mrjhqd 5t50ynd in a combination series and parallel circuit to a yr:h(0 r tmbn 5qd-k5jvoltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuxpu 1xu n1g+3t-.pd,nzvdb *cit diagram, all of the bulbs are identical. Which bulb will be the x tv1cdun.,ppn31dbu -xz g*+brightest?

  02.21: An ideal battery, an ideal ammeter, a switchuos,jhi0rt 4( and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter re0 thuj,s(ori 4ads 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 an yqa6 w-8c)ep3jdv7)lkt 9awv d three resistors are connected as shown. With the switch open as shown in the t9el67a3 k)qjacdv )wv- wyp8diagram 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/l rj5.ef tfe/ut 5om2 switch and three resistors are connected as shown. With the switch open as shown in the diagram the amme5/5 .ume2 tlft re/jofter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?