16.09: In the circuit sh*-rq-v.6yibhfo 9bylown, an electric current exists in the metal resistor connected to the battery. Whicqv i-lof -.hrbyy6*9 bh one of 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 parallel, the__4nx.zt gtj+f6 r9ylf15dv nk5 _______each resistor is the same tznngy1dj krt.954xfl5f v +6.

  06.33: A current through the thin filament wire of a l/c, ,d cldaq5)z-11gp p6c7j6xlt pxc7pdmv rightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This hap/ pd5acm6rzg7,vp)1 l7t1d xlc ,px-ccpq6djpens because

  13.08: Some standard household lights are be tw0b w19z-cfking replaced with LEDs. LED is the acronym for which one of the folltwfz9 b1-ck0wowing choices?

  05.16: A cylindrical graphite resistor has length L and5 m8fpwfhfi :om82zt8 cross-sectional area A. It is to be placed into a circuit, but it first must be tffw8o8ihmf85:pz 2 mcut 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 wirgb9 x rhg.acfl edb3;r)i5tht*w:;q, r bo.+he II are made of the same material. Wire II has twice the diameter ibcx:g+r;h h r)e.obr3,lb;twgqf 9 tha*d 5.and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the n cqh:qq3 hlb .-ambib1j6a8(diameter and half the length of wire X. If wire X has a resistance o-8bb:1alhqb. 36cami q(nhqj f R then wire Y would have a resistance of

  03.23: A cylindrical resistor has le o.:2o6r c. 5yyzrlxc3fc9pl)dmm6olngth 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 becaus:rl69o ml3pdc.c2 )f 5o.mr6cz ly yxoe of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. dvg0 4ki*h9nbHe decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltn4 kidbv *9gh0age?

  16.07: Three cylindrical resistor5 ot/2 p)ectbqie,1r l deo5t*s are made of the same material. The length and ral1ter*,2 qo 5 cotdetp)ei5 /bdius 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 cob)ygg)xi+j i0nnected to a battery in the following way: “Two resistors are connected in ser j)y+igixbg0 )ies. 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 a 7pws6p;oz m8yk,x y)s0mma r(ccompanying 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 vom7sz(8yx;sro,am ywp)m0p6 kltmeter reading is most nearly:

  97.37: Consider the c6 jbh shl,;5jhompound circuit shown to the right. The three bulbs 1, 2, and 3 - represented as resis bjlhj5 shh,;6tors 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 current. h8m,un(9a q)asu* ) tegmtqy in all three resistors u)hq na*mtst.ma 8qe(),9gyu is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed okxr egf zrkx 36+7z,5hlbsj*e5 j8mc;f 5 identrs; lfm7, 3+he ejbr gkk55zzx* 8jcx6ical light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the foi pej/ow4o,1l,.+dxrz:i xc nllowing statements is NOT true concerning the simple circuit shown where re d1z,cxi.+wri,p:/ e x 4jloonsistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a batteh*(xa s,n+u f2mc.d9wxpe w)ery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connex, c f9pse+duea hwwn*). xm2(cted 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 throt6nzkyd(2fkay;7 : qsa bc( cky15f, wugh the identified resistor in 5 seconds once th5 k; (k6:zdfbq(, n cywk2fa 17scytaye circuit was closed?

  00.23: If all of tpvlebo4x3fch:-vy-d0,ky w we0+e3b he resistors in the following simple circuit have the same resistance, which would dissipate the greatest powe +e0f,ew 4ylhy-wpod:x3e3kv-bb0v c r?

  98.34: In the accompanying circuit diagram, the current tkl)m z*y8ete1mhj t)bw)-*cwhrough the 6.0 Ω resistor iwl j1kw8eh)z)m)-mt yc *b*te s 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a batter (b-poojmg cm:u8iwhl -7jm.ddjmuh ,:v :x5* y. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 disvm:hg,uj 5djp:x b-7-:.mdim(*m wl juc8o ho sipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to a bat)6j3z9/v auenm -wi wbtery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What imvz9nab)j- /w3iw6 ues the current in R3?

  99.13: A heating coil is rated 1200 watts and 12bvwa(z tmp*)gok4.d 4 0 volts. What is the maximum value of the current unkp4w a. dg4)bm (vtz*oder these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to ope e2m8fr 4rxnd q.t gx6z08g2zlrate at 120 vol2z e 8gqlr dtm8.rfzxn4g0x62 ts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating)q/c )7x c;mby qyfmty4u:elgu) 4ew0 36 watts t:cewqyy/4 emgy4) 7u)xuc l;fbmq) 0of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.y+n7h el-6 h:yqz5qfm” In normal use, the current in fh6zq:5 e7qlyyn+ -hm it is

  01.05: Which of the folloyqyecl+1em 71 0,qhnowing resistances could NOT be produced by a circuit containing only th qho mq071l+ny,e1yceree identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalent so. 1mj d7pq8:s- ab tnv4at0jresistances CANNOTapb-0n1m t jtavds:7sq 8.oj 4 be produced using all three resistors?

  02.06: Three resistors of different values can .uikph7v0g+,aa8cd/l nin0 d be connected together in different configurations. If all three resistors are used in a circuit, hohai8/pvdkau g.7c+in , dl00nw many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a batm6tne 6,v-cznp1l fk+tery, a total power P is diss lkfp1ze6cn6,+ vnt-mipated 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 resistors, having resistance R1 and R2, vpq:z(wgcs3p 4ykw7+y) ) rt mare connected in parallel, the equivalent r y3ts 4vpq7gr( c)y+w wm:)kzpesistance of the 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 of 12Ω when opeh ,xq6xowbz dcy.:*;hv t4 m+;*l cotbrating at 120 volts. What t:w*h tq x,z;m bo +xlcc;v*y46. ohbdis 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 6yjd i3efyfu3.n8p*kflows through a 4 ohm resistor that is dissipating 36 watts of power? 8y6ynffp.uid33k* ej

  01.24: An electric heater draws 13 amperes of current when connected to 13hg 57u iwx qb v+dy0ph,dzs. o.c5u.r20 volts. If the price of electricityrc0 s pwuovdz5g,by.qxuih.h7. 35 d+ 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 lit cogf) y sg,xgehkxp zd -e,8wb 891d+e.fntinuously for 1 year at a rate xzf+ds wxeg befgy hp1, de.kg9)-8,8of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb reso8p + cm, ;a8a4i eqvmg.-ethvults in a power of 24.0 W associated with the bulb. Which one of the following choices best representsqv cav m,4mp 8a.8-e;+togi he the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at zm ads2al15 +m500 watts 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 same mz2sl+ma51datime?

  03.16: A 9-volt battery is connected to four resistors to form a simple circuit j(/ zj heyp,)has shown t/j y,eh)zhp(j 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 conne2)8 cayq 5ljhrcted to four resistors to form a simple circuit as c528 lqyh)arjshown 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 /k.f cfl,xxmmk+j+g78y:fmk switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter read :/j f.k +ffc+m 7x8ykx,gkmmls 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 t l,41cd7 9rewags u+ofhree resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 9faol ds1+4u ,7egcr wamperes.
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 resistors aree xtbgp5x;kxapul,ns w(5 ; /, connected as shown. With the switch opa;g/wuxp ,(b x,;ke lnsx5t5 pen as shown 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 shoafvhe(c968+m rp , ed qr+zvn5wn to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resista8 6+frq,pevh9ndvza (ce5+mr nce R.

  09.07: The equivalent resistance of the circuit shown to th8m/e8/a dec6wv5(g0fwl ixe ue right with resistances /g6wlica/xee5u e w08d f8v m($R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in p)p0zi; dh:hob ; qvm)(mti4la combination series andhlmv d;mbpiohiq0() : )tz;4p 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 connected in air4nf3k m/j(m combination series and parallel circuit to a voltamm3j/ r4kf n(ige source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit dm 9( uvq9hoioocc9y: 58n/i t4sxwq. wiagram, all of the bulbs are identical. Which bulb willoqoih m9q9t4y/vw58s . (uoxnc9:ic w be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and 4tk9anzr;*1fgl ) v5 w:p3t z;gng hdhthree resistors are connected as shown. With the switch open as showv*d gg9 ;pfk4th:lzt w1rh)n;zna 53gn 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 resis nd-n.2si3xt:h-- jod ;jtz hwtors are connected as shown. With the switch open as shown in the diagzowtji-:;.-hxdj tsn3 h2-ndram 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 :2mele mymr1epj 9m 23ideal ammeter, a switch and three resistors are connected as shown. With the m2: meeem3 j y19lmr2pswitch 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?