16.09: In the circuit shown, an ele;0 re 1npowx1mu,/qvcel;edwmr9* j/ ctric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of el,roxqjrw10 ;9pl w *1;deme/uc/e mnvectron 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_________tx2z). cebk d yne -376rpyy-peach resisto3xb z)p pyyn 6 -ce-kreytd72.r is the same.

  06.33: A current througx9 as1-kudd-gh the thin filament wire of a lightbulb causes the filament to become white hotkua -g 9s1x-dd, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard housawbw entw)1f jz 5(:j*ehold lights are being replaced with LEDs. LED is the acronym for which one owj 5e:zaj*f)wb(w tn1f the following choices?

  05.16: A cylindrical graphite reg-jhgdea 2 3x4sistor has length L and cross-sectional area A. It is to be placed into a haexg4gd2- 3j 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 etdz 7r/fm8 2ware made of the same material. Wire II has twice the diameter and twice the length of I. If I has resistanceez 8wdr27ftm/ R, II has resistance

  99.31: Wire Y is made of the same /k3x m9 eq/ctkmaterial 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 resice m3t/qk xk9/stance of

  03.23: A cylindrical resistor has length L an r f;nqu40b gl/5m7 po*kpeujt6h eq0:d radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What ha /p*q ugmk 0erophe ju;btf6q 5:4nl07ppens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighnta 6isu f;pcvzd3f.;:r)w 2z ter light bulb. He decides to modify therp6uz;nif .w;3 fztdcs a2:v) filament. 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 made f 8)b 7g3s/bb gfu,vzikrxx o3 96ae9npd4/ ghof the same material. The length and radius of e3zxfx9/4 g 3bvbnepk hgo7gf sbu,)a9d 8ri/ 6ach 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 connected4 3swjip7m+ey kk-4yapo1)6pqgo inz1e w0 q8 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 four3e41 q) 4woy apgmniy opsjkw-0ikq17z8pe+6 th resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in tektq*zy v3g d6 pv0z4t0b *2slhe accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. Theqg z006v3dt lv *k*2z4ptesy b voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown ;wy0u(+hl wdqto the right. The three bulbs 1, 2, and 3 - represented as resistors in td0 y+lq;uw(w hhe 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 jz uy9)ua1 h tz2q:ys*the current in all three resistors is equal, which of the following statements must be tr 9tuyzh2 *q uzsja:1)yue?

  99.37: The diagram at right represents a sik)r+y :ehjpna :6mo9kmple electric circuit composed of 5 identical light bulbs and 2 flashj rn:9:+oa)myk 6 epkhlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple3i5jjxpgmc5 3 circuit shown where resistoxj5pj m5cgi33 rs R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X iwc(csj 6jg7o:) 8mvxw v mf28is 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 represents what is observedxmw gv8j2w(icf)s7 :6o8j cmv ?

  06.34: How many coulombs will pass jk1m:.,k ffzmc n, (gsp) t3fcthrough the identified resistor in 5 seconds gff sjnc.p) 3:mf(zkcm,k1,t once the circuit was closed?

  00.23: If all of the resistors 64x8 vtl0qoq blr .2 drh1wcm0 in the following simple circuit have the same resistance, which would dissipate the greatestb 8ldq6c0o .4qvhrrlwm01x 2t power?

  98.34: In the accompanying cir2hhk3 wxvzp8kc5 je4)cuit diagram, the current through the 6.0 Ω resistor is 1.0 A. Wha23zc8j phk4k)v hwx5e t is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a ba:s4 r f*mtx2ehttery. Suppose R1 carriesx trhfem:*2 4s a current of 2.0 A, 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 afsbc;v8jn* q0- dymn: re connected in parallel to a battery. Suppose R1d-: bvs nn08fcq;my*j has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is pzn:q 91emn* ithe maximum value of the currqn:iz pn19*m eent under these conditions?

  99.23: What is the resistance of a 60 watt sm0h,bylx jt*tv, x:6lightbulb designed to operate at 120 vo*lhv s 6mbt,x,y x:tj0lts?

  03.09: How much current flows through a 4 ohmztc;wf5ec 0z7 resistor that is dissipating 36 wac;ctz7 e z50wftts of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.q;.mf/rx2u gae5weg (n 3ey*i” In normal use, rg2/ 3x5qn.ewuy;g(im eaef*the current in it is

  01.05: Which of the following resistances coux bj,qm v ,,uylm)3.ield NOT be produced by a circuit containing only three identical 6mimuq vb,),x,ly .je3 Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equiva 3cw.azx r,i32nhg n2ufrys; 9lent resi rw nz9y2h,a rscx.;uig2 33nfstances CANNOT be produced using all three resistors?

  02.06: Three resistors of d2kbvuxn2(02 ws pninv,t.x4; eg kl a6ifferent values can be connected together in different configurations. If all thr0i.,24sven kua2 ;n x(wplg6 tnkbxv2ee 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 batter7p mtg-o vc-a0 *e3c3p7yzclqy, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connected in series using the same battery? As-0tz3m*pgoccq7 7p y c-3 avlesume the internal resistance of the battery is zero.

  96.16: When two resist;8wx j3pj7p,t 8pb0r 7tzigcm-6qwsvors, having resistance R1 and R2, are connected in parallel, the equiw;z jqs-m8 06tg3i jrcxbpw78,p7t pvvalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it ted 22+ahp ,sljqc/y(cu 1zi pkv+ /9c6a+ve jhas a resistance of 12Ω when operating at 120 volts. What is theedpv+1a,c2 k/ t6 jlveq (zs9a cijp2uhy +/c+ 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 through a 4 ohm resistor r 865i 9n3etjhxxu bvno a*;7athat is dissipating 36 watts of poj6b8*h35ran nvt e7 i xox9au;wer?

  01.24: An electric heater draws g:3 j*gmx7kjojp 05flj 4kx8c13 amperes of current when connected to 120 volts. If t jjf0lkxj5ogc83 jpg:4xm7 * khe 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 100W lightbulb lit conte 4(h 4uyn y.cv9c7cgwa5ua r2inuously for 1 year at a 57cuaga.9( nv4re4hu yw2cc yrate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb reh vs6fqe :yst) ,dod a:e-f73ksults in a power of 24.0 W associated with the bulb. Which one of the following choices best represe)dsse6k:dqyv:e3-fof tah , 7nts the resistance of the lightbulb?

  01.10: Each member of a family of six owns at +wazr2o,*i lql,kuw5fvwkj60 q; h; computer 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 is the maximum number of; 5h0 wk2lf q;w ka+v,l rqtiju6ozw*, the computers can be operating at the sametime?

  03.16: A 9-volt battery iz2x mfa99 6n3zgrby66z5jjlcs connected to four resistors to form a simple circuit as shown to the right. rc9669yj zg2nf x3ja65z bmlz
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 mov +t0w5sdm,b 9wff;form a simple circuit as shown 5o9 wdfvm0mbw;t sf,+ 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 and three resistors are 3:tn6m ka q1deby g;7flw r7b4connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes. ;7f4 knb:g tdb167l yamw qer3
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 a03,pg 8gnat nl5s,zmwnd three resistors are connected n s tl0,pgg5w,n3ma8z as shown. With 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 2zd9efb8;el j n;izfrh3vq0)+fyfr- and three resistors are connected as shown. With the switch open as shown in the diagram the ammeterq fv 2h+0y9rdzfferz83 ) le-n;ifb;j 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, wr(09 gcrxlj ;hhat is the equivalent resistance? Assume that all wgxlr; cr (09hjires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the rigr k if,tn7v xusq0o4qb2;v0m+ht with resistan,r sb 2xfqio;0qumv7tv+k 04nces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identi-w8+ 1qtj buolcal resistors connected in a combination series and parallel circuit tootbqwlj -+8 1u a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five ident h1,d,y iptudy( k11:lelt4spical resistors connected in a combination series and parallel circui tuypi14(1, dl:ypsl, 1hd kett to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs sx09e/rh 99fzo,iqyv are identical. Which bulb will be the brightest?9qive hs ,fxr99oy 0z/

  02.21: An ideal battery, an/08 7h)vwdl 7yxkba.bk2cgr2k4a irm ideal ammeter, a switch and three resistors are connected as sygx7avw/ hk2am )klbck4.8 drib07r2hown. 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, 2ko k zb6dnoxt)f+y 1,an ideal ammeter, a switch and three resistors are connectedoxf62)ny ztok 1d+,bk as shown. With 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 a15g.l 1ul4j3dpc(-jic l t skjnd three resistors are connecttcjs4iljjp13 5u klc(.g-dl 1 ed as shown. With the switch 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?