16.09: In the circuit shown, an elect95vh o+q.k)s* h1dfay np lc.wric current exists in the metal resistor connected to the battery. Which one hq5cfd .k.yvwh)+ o *9lsap1 nof 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 con )q;xg ia**box 0*jpmznected in parallel, the_________each resistzj) i*q m**;g0bxao xpor is the same.

  06.33: A current through the thin filament wire of a lightbulb cau8pnq,mjg j8w n(hs0q 9ses the filament to become white hot, while the larger wires connecteqm 98wjqn hp(s0jn8g,d to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEacxt-7kaj2 e0d uujg 6fbv.u; 1)g -mgDs. LED is the acronym for which one of the following choicb-072)u. gxfad -ugua;ve m6kc tjjg1es?

  05.16: A cylindrical graphite resistocshf2685lafpsb v. w*r has length L and cross-sectional area A. It is to be placed into a circuit, but it first must be cut in half so that the new length is 1/2 L. Whflssfv8a.*b5cpw 62 hat 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. u5p1l c xfgt-+Wire II has twice the diameter and twice the length of I. If I has resistance R, I5 u1gcfp-xl+tI has resistance

  99.31: Wire Y is made of the sau m;zn9 u:) glffw;2lsme material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a ;g ;ln:9uz )ff2swumlresistance of

  03.23: A cylindrical resp76sv7klf gek2ju w 7blwv85 -istor has length L and radius r. This piece of material is then drawn so that it is a cylinder withgb8w 77 fl6lk7-vwukp2 5jevs new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edisoavltsp30 +tu*,8k h)x sdr hj+n wants to make a brighter light bulb. He decides to modify the filak ++r)8t hhsup dxv*ts 3ja,0lment. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are mad7z-44 3bl jo phwdfw2le of the same material. The length and radius o 4wfl-whjd43 p72zolb f 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 57lxle:vzlbpuc bk m,)t:6-kof 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 se :5tl)l7p lck6zk x-vbu:bem,t 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 ci*ul8 w5ppf1qfq mht3 5rcuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter readip51fq m 3 5utph*qfl8wng is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the ce i y/o juvd5j/k6y-4iompound circuit shown to the right. The three bulbs 1, 2, and 3 - represeney/56 iivy4d -/jkj uoted 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 t4emq(2 i8iytv.pvo6d 6s 9sj current in all three resistors is equal, whiyt. 6 veio 692mijtspd8(s 4qvch of the following statements must be true?

  99.37: The diagram at right refe s sz+(tw7-kpresents a simple electric circuit composed of 5 identicafk(z-e7+ ws stl light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements ica c; g q.euh.ro aho:*m7;ap0s NOT true concerning the simple circuit shown where resistors R1,m rohceg:u7 cp 0oa;*a q.a;h. R2 and R3 are have equal resistances?

  17.29: Two lightbulbs Xmq8 udgfm clu-6 e3*4q andY are connected in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in p4e* fuqmgu3 cmdq 8l6-arallel 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 identified/ z2-.zm 0f;aok zkkpw resistor in 5 seconds once the circuit was closek2fw./kz;m-pz0o zka d?

  00.23: If all of the resistors in theta 70nr u03 e+v8xy aunl+w1fk following simple circuit have the same resistance, which would dissipaten0+3v yk xwf0nuret 7u8al 1a+ the greatest power?

  98.34: In the accompanying circuit dia 74ag: p)mnbgagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply voltage V?b7)a 4 pnmgg:a

  97.27: Three resistors R1h)74b-f(qb hhl)xg +z dc,nxm, 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 fd,c()gx7)n-lxhbh b+zm 4qhdissipates 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)k1ysh j45vx2zosj9o battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W.ks2vszo1x 4)y5 oj9hj What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. W 5r qjxm/2pi0jobiki (d)nb()hat is the maximum value of the current ujj))0 /2im(nod5q(i pi kbxrb nder these conditions?

  99.23: What is the resistance ofm 5u cj3fv,l5p a 60 watt lightbulb designed to operate at 120 voltlp j5uf,vm5c 3s?

  03.09: How much current flows througr dz+ajt:/(dw0z p0x th a 4 ohm resistor that is dissipating 36 watwtz:d0+d (xp/t ajzr0ts of power?

  05.21: A household iron used to press clothes is m0jg:gx;5vt0g1 rfk )j 0fnaqvarked "120 volt, 600 watt.” In normal use, t05kjnvr 1 ;0vajxg:qggf0)f the current in it is

  01.05: Which of the following resistances coulooh9 0-lyzeydrtl xoz4 t -h+c64 1;did NOT be produced by a circuit containing only three identcldtohhl 44+ ;9zoit y0zrdoxe-6-1 yical 6Ω resistors?

  94.37: You are given three 1.z,xk)4 m tku,w0 Ω resistors. Which of the following equivalent resistances CANNOT be produced using all three rem,,x) k4wktzusistors?

  02.06: Three resistors of different values can be connected togeth8 6. qsw: yil/q;t:u( d)uunwqa) hfmyer in different configurations. If all 8t l/qumd: hn6qa)uyifu; qwy.w:( )sthree 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 batterk (ul-umr5,ypnvemp 3,w)llu z35cz+y, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistorvmc+,ep u3n5pru)yz wl 3m k(z,l5-uls 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, ar-m rcp3ek +1yfbf zf5;c5 s;ice connected in parallel, the equivalent resistance of the combinationipymsc cbcf ;;13z5r+5ke ff- is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has ahwkmp *il3,5r resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it 5m l,k*3prwi hwould 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 resistor t v3m1j1 1ww2g z6k ho8gcyvls+hat is dissipating 36 watts of poy8 2o vzjc l6+1wg3wgvm1k h1swer?

  01.24: An electric heater ;e yg8 qg4*d9 k k4d46oigqudzdraws 13 amperes of current when connected to 120 volts. If go*;edd q4iy864zgqukgkd49 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 ,4sg:ql5,xsw zm 0bd za 100W lightbulb lit continuously fo0,mq xszgwsldz, 4b5: r 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a powe3 kq (zxmb6gxe0*sg:yr of 24.0 W associated with the bulb. (qmbx:ggsx06zke3* y Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a famia(gfd, k p,o;ily of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a ,ipd;ok fg( 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 connec(g2 d /*k 3sc-i)gtwrqf mh)ulted to four resistors to form a simple circuit as shown to the )i cru/lw f hgg-)dqst3 (m*k2right.
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 x/l7x4vyw;p y, ha5c zto form a simple circuit as shown to tvp,lwz;4yxh/x 7c ya5 he 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 r,9;qrn/az yc8 vs+o2lv wy2pand three resistors are connected as shown. W qc 2rwynv y/v,p+;z82sol9ra ith 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 gq5(1pr atgq-are connected as shown. With the switch open as shown in thq5ggr t-1q(a pe 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 three resistors a:l- l*ivbn..mwi wa8kphng) / re connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 nl8-wa hl inpw )*/gm.. :ikvbamperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shown to the right, what is t0s(jf3 m,(/vvuhd+kq4by p i 1a a5ujkhe equivalent resistance? Assume that all wires are ideal, the baj4mfy5vk/kb jsiuu qp0a(( , 13+ah vdttery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance ofq+tunv*alu;7e*j34; ndb g +. stm fqa the circuit shown to the right with resistances s.fa4b+nq*d q;t+m u3lu j a;tv*7 nge$R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistcp(vqn476 i(kmjv- j gors connected in a combination serij n(g-v4mq6( kjiv 7cpes and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows1h pu6 hpwue3* five identical resistors connected in a combination su p h31*whpue6eries 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 ide+u8c70 5df+1iugr thzzvhqg2ntical. Which bulb will be the brightesuzf0guvrh5c1 tqidg 7 +h+ 8z2t?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are connonjql4h. eu/9 c3rbo6ected as shownb q6 .leo4r3j co/n9uh. 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 resimx,6*f ,5okrpvulyj )stors are connected as shown. With the sw,,fu)6xv*jk mp5 lo ryitch 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 sobi)-kyn ge70 witch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reaebo)7k-giny 0 ds 2.0 amperes.
When the switch is closed, what would be the current in the circuit?