16.09: In the circuit shown, an electric current exists in the metyn ekbz6u :6ofr 3:xo3 i*cm1ral resistor 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 ely3 :orczn:*6u6mb 1kfroei 3x ectric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the__u-6;zv - b uj,qvk ,42f7ipfitr dbe-i_______each resistor is the sa ,2id7p6uirfjbebz - uq4;if-v-kt , vme.

  06.33: A current thr6i9 mpvyyp; qug*p,)iough the thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remaipuyvi py*9)qp ;m,6g in much cooler. This happens because

  13.08: Some standard houtartb ts- /g. u/)f4fusehold lights are being replaced with LEDs. LED is the acr)/btgt 4/asfuu -t .fronym for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area A.ox6qb e4t myfy39h4-g 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. What is the ratio of 4h tgq-3yyx4e6mbof9 the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made 2/ee+xb ai,a6kcs6ne 98k sfrr(*ejl of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has rislr,ab8(6j xr6c2 nes/eea + kekf*9esistance

  99.31: Wire Y is made of the samejlneo* y2wk p+p72l ptc876vg pbht 07 material but has twice the diameter and half the length of wire X. If wire X has a resistance of R thep2j26o0*vwplett7nphcl77pk b+ 8y gn wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of materialg 5-h1 y*spbj/v us9nq is then drawn so that it is g/*1q9bsy n hpu-jvs5a cylinder with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edtq; xk,zzou;/ u / ) z9:zhqfhf4mi;xpison wants to make a brighter light bulb. He decides to modify the filament. How should th xff;z:pz hhqu tkoquzm);z//9i ; 4x,e 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 made oe gv4;(ndj8l of the same material. The length and radius of each resistor is: e8l4vj;gd (no
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 resistoroo p -2x2jyt3fs, each of resistance R, are connected to a battery in the following way: “Two resistors are connecteyt x-jo3 fp2o2d 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 diagramo,n-xp4a wg/.vmj4y 3s( lcr n has internal resistance 10.0 kW and the ammeter has inteym/w arl4jn(x ng.43,-ocp v srnal 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 rigl 2ocy0x) 7a 2nqdrklj,y)i-qkl;4 ught. The three bulbs 1, 2, and 3 - represented as resistors in the diagx r2y)k2gc0u;yn)l qd,klqi oj4a7-l ram
- 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 ci6m1g80xvio8ommy9n ercuit at the right. If the current in all three resistors is equal, which of the following statementsy ivonx 80mg68m91ome must be true?

  99.37: The diagram at right represents a simple electric circuit ;j lk /*ob ds4j-nr5gccomposed of 5 identical light bulbs and 2 flashlight cel ;donbjsc/- g* l5jr4kls. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following sjog 4 qjmkke2 ;zuf4259sa.t ftatements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equaljouf2kk az e g4s9.tjf2m;q54 resistances?

  17.29: Two lightbulbs X andY are connected in series towh3zc bp e4:d8xht2. y:t*c2o x pfzb0 a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbsxt t 0exh3zzob:cf2 d2b*chw8 y :p4p. 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 identified resistor 2tb*m7i)9w ( xkzhr qxin 5 seconds once the qkbiwtz hxr(9x)m2 *7 circuit was closed?

  00.23: If all of the resistors in the following simple circuit bjgak5n* .uq0 have the same resi0ua kj.n5b*q gstance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram,h /fe73g r)f2h eu1ric the current through the 6.0 Ω resistor is 1.0 A. What is the power supplu7) ef2/ghei 3fh rr1cy voltage V?

  97.27: Three resistors R1, R2, an zuj1 h-sa(9nod R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 hn( oa1s9hzuj-as a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different p nh64.o ie: dzbfdn;5resistors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is thp: ;. dz4oe6nnd5bfi he current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. W-* gzh;4 *qkuifeh*vbhat is the maximum value of the current under ;hkq4 uvei*-f*bzh * gthese conditions?

  99.23: What is the resistance of a 60 watt lightbulb desis i88h2f4mf wbgned to operate at 120 voltb 8mi fh2w84sfs?

  03.09: How much current flows throughqp slsb;gly))j1 w6zxs9,1h k a 4 ohm resistor that is dissipating 36 watts of pss;b)kgwy1l )l9sz,xhq6j 1 power?

  05.21: A household iron used to press clothes is z,hvp8 9 cpusriyt.*/marked "120 volt, 600 watt.” In normal use, the current in it iszt r h /spu,yi*89v.cp

  01.05: Which of the following resistances could NOT be p+ )3k s5qalvyqroduced by a circuit containing o kqs)q5+ lav3ynly three identical 6Ω resistors?

  94.37: You are given thregr,m d yqes8;:e 1.0 Ω resistors. Which of the following equivalent resiq ;rs,:ymd8e gstances CANNOT be produced using all three resistors?

  02.06: Three resistors of differentl(aw 2nio *5t3 g ela:cst4r6sl+im ,k values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total renk5gr e4 ta6iltwi3*2lo m ,a(+lssc:sistance can be produced?

  97.35: When a single resistor is connected to a battery, a total power P is dird/uy py1tm l53 f8)ffssipated in the circuit. How much total power is dissipated in a circuit if f1t/l)u 5fymy8 drpf3n identical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors,l 7cslrqm0: w - pu0fup.jh*gpf6-/fn having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combina0wcm-q- : g.l0 phfjnp/slu up*76frf tion is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has aw76 y;euuxgc* i.v. va resistance of 12Ω when operating at 120 volts. What is the minimum amountyex6w*. gcu.v v7 a;iu 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 4 ohm resistor that is 2p a bykd z2v/7yg03am+rrj 1cdissipating 36 watts of pog+/3b1v2dpcr a 70az rymj2 kywer?

  01.24: An electric heaterz: rztu27:mf xsec992doa+ jv zi*) fz draws 13 amperes of current when connected to 120 volts. If *2:i+xzf9smvz:)cdr e fjo972 u zatzthe 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 kc 14.c 4ey an*i+dkmxfeep a 100W lightbulb lit continuousl *fdcmy x4. a4ikn+ec1y for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant cur qwkqu i;:2-akrent of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the followingk-w:q;2a iu kq choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a c87eb 8t ,mlms 5ty)gtuomputer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what i7 mlg8y8s5 ebtttu m),s 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 sim;5i j9t3c,kc ouexz0 iple circuit as shown to the right. eic509 jtk ioz3x,uc;
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 to form a simple circuit ys3(/4jgh5 . ;zuyscnv0 ghji asv/hjyh4 s3n(gucjz5g ;y i .0s 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, a35g qv0ws*9ozoft,(. le cxga switch and three resistors are connected as shown. With the switch open as x,5w.0oov f9* gqe3ag zl(st cshown 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 ammeta4h7 pt(rr cb6er, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.4(r arth6pcb7
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 resistor(8w2)przfg .bq 8b wfus are connected as shown. With the switch8pg8 wb zqwf(b.)ur2f 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?

  12.14: For the circuit shown to the right, what is the eqy7(- oyesb6d luivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R. sol7 ey-by 6d(

  09.07: The equivalent resistance of the circuit shown we. xxxf*n*)lq7iq9d7 ey1 ck to the right with resi)1cw9q yikne .fx7 e*lx*7q dxstances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below sbsb,n ez9: 3a:vuxr4 zhows five identical resistors connected in a combination series and parallel circuit to a volt :v4e39z r bb:uxn,zsaage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical rbxl,4hhsrq, . esistors connected in a combination series and parallel circuit to a volx sh,bl,4.rhq tage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circur( is2sfm3(-cbf f7ht di/o7git diagram, all of the bulbs are identical. Which bulb will be the brisi-os m/(d tfffgicr2 3(77hbghtest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are conx,y2;vdlbf c/ nected as shown. With the switch open as shown in the diagram the x/ vyc ,bf2d;lammeter 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,kf- aaq (npdy5;y4 xq7 a switch and three resistors are connected as shown. Wit n ;5k7x-yqa4qydap (fh 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 and three rld7 pysb p 1x/b.mi31sesistors are connected as shown. With the switch o3/7bypi .s pslmd1 1xbpen as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?