16.09: In the circuit shown, an electric current exists in the metal rec g85gd5g lyv0sistor connected to the battery. Which one ofc5ygg g vd08l5 the following choices best describes 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 in parallelazer/bw( vgj b r;)bvx e ql/9/-ka:q-, the_________each resisto b: kzax/jvq vbw(gr-)q/;r9l/ beae -r is the same.

  06.33: A current through the thin filament wire of a lightbuli1wki v)8rko8z tv i )c2 qvic.j39d5hb causes the filament to become white hojq 2icchtk o)iivi8 d 1 kv9z3.w)5rv8t, 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. LED4; / cygxa.ecfiox.7k0afxn, is the acronym for which one of the following choices?aenoi xyxk g0 cc/.4.x,fa7f ;

  05.16: A cylindrical graphite resistor haazkgyy57:b sd9iq d80s length L and cross-sectional area A. It is to be placed intks8 5g7d 0:qyydzb9a io 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 wireg81)8tw zpewye (a9xj II are made of the same material. Wire II has twice the diameter and twice egtxyp)zea (8w9j1w 8the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made o;uf-u/u*di(,dg/ lmv(v rc csf the same material but has twice the diameter and half the length of wire X. If wire X has a resistance of R t(-cdv s;iur(/l uvfmu/*,c dghen wire Y would have a resistance of

  03.23: A cylindrical resistor (j *r;1gg,h.su,( ay1mlqpemyo9zejhas length 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 material becau gm( z.(usph9,ryq, om j11;*ljye agese of this process?

  07.27: A junior Thomas Edison wa*s ;4 lojzrk*5.vu ace jf6t;jnts to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in ou4rj. fk stjl6v5a *c*ejoz;; rder to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The length anft3-3bls15,.vq hjvp pvdd2 nd radius of nv plh.1v 5jdb f2,v-p3dqt3seach 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, ea()tcm9w m dmj-ch 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 resistors is connected in series to a fourth resistor.” What is the equivalent resimwcd9 (jm-) mtstance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying f544b-3 m) bilb*m jva/ rqmrqnh(;jo circuit diagram has internal resistance 10.0 kW and theh4jbq )aj5*lmbr3f;qob(/ i vnr- m4m 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 shown to the right. The three bulbs 1, 2,)0 wjqqdwsepclc .*1 , and 3 - represented as req scwwc) d01p.lq*je,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 elm/it6qe vo. xo+0yr5h5d6 h zmectrical circuit at the right. If the current in all three resistors is equal, which of the f.eo 55+mx romq66zv tdhh/iy0ollowing statements must be true?

  99.37: The diagram at right represents a simple electric circuit compo-71qyb i xdi1esed of 5 identical light bulbs and 2 flashlight cells yx1-dqi 1ib7e. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following s1id c2nmtoh0/eoba bag +ml ;6,tg 2,statements is NOT true concerning the simple circuit shown wa1 tgb6 d,o m,/il2 +aoenmg2cth;bs0here resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Buly*( e,4z0:()nlin zc*vujbh6 t tmn tzb 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 one of the following choices best represenn,j * in40uvz*:c y()b(het tzn6mtlz ts what is observed?

  06.34: How many coulombs will3nsc ro.v9-,w zuar zho 86+xq pass through the identified resistor in 5 seconds once the circuit was awqcznr h,o3vx-u ro6 z9s.8+closed?

  00.23: If all of the resistorsvphb;46uge - g4gf6mu in the following simple circuit have the same re4pge u4gbhm 6fv6-gu ;sistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagr v pbgl5id3u*bm6n.s0 am, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply volt 5givbbpnu* sm3.06dlage V?

  97.27: Three resistors R1, R2, and R3 are connected jka8 3sfgx98c in series to a battery. Suppose R1 carries a current of 2.0 Ak a98sjcgf 8x3, 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 uf9et7rjhg6p. *c lmhmmnyi 3) d33 t:are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 d*dy)ge3hl9mtp6mrhj3u : 3n.it 7mcfissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts andvc0hgy(yjd8 m (0ft5 b 120 volts. What is the maximum valu5 0g dth(bjymy( vf8c0e of the current under these conditions?

  99.23: What is the resistance of a 60 watt light m,qk.tjd. n0hbulb designed to operate at 120 volts?dkj..q,tm h 0n

  03.09: How much current flows through a 4 ohm resistor that is dissip cdobiovi(zz, ,f7n()ating 36 wa),zo(n( voifzb7i, cdtts of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watcv g;sh21eb /jt.” In normal use, the current inh12 sjb ;vcg/e it is

  01.05: Which of the following resistancep f:i),rf q 7sswp(gj i33yf,ps could NOT be produced by a circuit containing only three identical 6Ω resistr p3y,)3s:fp,pwfqgi 7f is(j ors?

  94.37: You are given three 1.0 Ω resistors. Whichl:c0tgkc8qn)e e k wj)el5 3f* of the following equivalent resistances CANNOT be produced using all threek0c)38:t lq eefn)gjl w*5kec resistors?

  02.06: Three resistors of different value9rr txgms36*r(u/a i ns can be connected together in different configurations. If all agrm9r/ in*x6s(u 3rt three resistors 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 pua m.4a3;va9. d9y7 or)n utzdq .zkyvower P is diss9 )vmod9u 4y.q tz..ar;vaaydn7u3 kzipated 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 internal resistance of the battery is zero.

  96.16: When two resis6n hd 1cq h7 m2)fden4sem;yylz+3 gkid;0sm0tors, having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following stakd46e70l 3s in;)+m0gd ndchey2msm fy hz ;q1tements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ωli*+b gf ues)+ when operating at 120 volts. What is the minimum amount of time that isf*+ bu)+ lgiet 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 resis .l0hvsev; l+k0x5/wg uq zw5vtor that is dissipating 36 watts of0 q5w. kvg0+u ls5/v vwe;lzhx power?

  01.24: An electric heater draws 13 amperes of current when connect.olc-.1 :fsqu* kaboaj9 (es o q+9ofoed to 120 volts. If the .o1+o . ojqofq-:fs(cou9aa9lsb*k eprice 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 i+ko9n w(3xa( p/(lt, olihbr wt cost to keep a 100W lightbulb lit continuouslyh3x(/l9woowt ir((pan l+b k, for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lig sm sfeaj,j8r/v /2fm:htbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best repre/m,s:fjvj 2srfa /e8m sents the resistance of the lightbulb?

  01.10: Each member of a familgm2n(fc 0+ukul*ao eb )g5p.e y of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a sea b.gepucg02ufnm+ *ol5 ) k(ingle 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 fo ,zo0qj8 dvss)ur resistors to form a simple circuit as shown t8q0zj, sdsv)o o 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, h,hc8ctcvb 6 to form a simple circuit as shownbcvtch6 ch,, 8 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, g-h*( 1yer hxu7(zsul1 -uvsr a switch and three resistors are connected as shown. With the swit y(us11h7 vux surz(g-r-hel*ch 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 i ,tv/gn tc,+ij:rl/t0tqu tf,deal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the atvtfjgq/c+u:, ntr it0,l/, tmmeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal amm 7csw7c-l ryuoegob81r 9cx68k61i(ndca 6r feter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.-c f ro7 ad9l866crr(7c1ei6x ukyn8wgscb1o
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 equivalequyb 74v45fsr nt resistance? Assume that all wires are ideal, the battery has no fuv b54s4y7qrinternal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the crk - b2 xlt8-hi*jt;a0dx-nw circuit shown to the right with resistc;t nb*x ---lk awr8ihjtx0 2dances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected ip2 zsp/4kuy r;n a combination series and parallel circuit to a voltage source.up/ ;kp4 2syzr
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below showw3in fzls* 2pl- o1n,w 7np-sss five identical resistors connected in a combinatis*fpnso7 3wizw1pn2 nl- ,s- lon series and parallel 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 identical. Whf9i:wa de)2u mich bulb will:imwd uf)a29 e be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are v,qgc5zex-vs 7; p 5teconnected as shown. With x75zs,pc v5eg-;qt vethe 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 i*;hmfvnu i 77ge s(i.cdeal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter (c7enhf;m.ug iv7 s*i 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 resistokjwo i( x(spv) 0/uy)zz+*mkhrs are connected as shown. With the switch open as shown in the dz0ypk w/xkvz)i(m+*js( hu o)iagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?