16.09: In the circuit shown, am g+md. wjy3w0n electric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through w03mywg dj.m+the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected infv h+gz 8(q-rc parallel, the_________each resistor vz+hf8 gr (-cqis the same.

  06.33: A current through thy0 xl (xf-u7k9c c xn8nrt.;une thin filament wire of a lightbulb causes the filament to become white hottn f-.n n7;cxxu0lx(cr8yu k9, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being rep,cr 5b8hcmbk/laced with LEDs. LED is the acr m bcb8rk,5ch/onym for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and5e5g3ph; r0v6h:tiwze ky k 6 dyu08nl 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. What is the ratio of thek 0n53ugp; e6e z6ykirh:8lw0 yd5t hv new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are mad4g, xttq skn/;7o,wct e of the same material. Wire II has twice the diameter and twice the length of I. If ;x,twcotstkg4/ ,7q nI has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has td.5vt3od 7,pqbd, xqi wice the diameter and half the length of wire X. If wire X has a r7x3o pdiqd,vbq5, t.d esistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has7pbikkvpk 4)9 length L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens topk) pikvb79k4 the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter ligh2*9 8hv(no k9 kadcnyut bulb. He decides to modoh92y kunank (dc98v*ify the 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 rer22g;lhhee 35h)tqf ffmt;zxv 6n.0xsistors are made of the same material. The length and radius of each resistor hqhtm23 f;; 0h 6v )2gefnxrx l5.zfteis:
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 resista4.n 6s(acgpxdmgk -z khme/56mhr7; snce 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 resistance of this arrangenk6-s psa6xk4 rz;.md(hg7c 5/ghemmment of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internab4o u8gac((akp m27 na+g i-nal resistance 10.0 kW a g(u7nnab ga-m+c4(p o8ai2k and the 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 righihb-k7 gtvg 9h5h,3oy.m-aq it. The three bulbs 1, 2, and 3 - represente7a-h.vy 59khb,t mghog i3 iq-d 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. It/5ww6/mt:u:ffe gdkw9d p0 nxq x w12 f8k2udf the current in all three resistors is equal, which of the following stw w wd26f/ge/fnq:1 md:2utptk509wxfk xud8atements must be true?

  99.37: The diagram at right rex0k a((ebg.vak vn0 6xpresents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which.6 ve(ab ga0kk x(0xnv bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statem.1y dpr;ndn2xw pw;:xe: tt1ments is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal res;r:;new :w2 nxp 1p1 .xymddttistances?

  17.29: Two lightbulbs X andY are connected in seru9f s4lw5 :k ig2aqz5nies to a battery. Bulb X is brighter than bulb Y. Assume aw9nzgq:2lfsia 5k4 u5 ll 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 observed?

  06.34: How many coulombs will 8bio:) o bbwm8 pass through the identified resistor in 5 seconds once the circuit w:bo)w b oim8b8as closed?

  00.23: If all of the resistors ,wp kve/f.du)-3f brb in the following simple circuit have the same resistance, which would dissipate the greatestr w3eb)-bku /.dp,fvf power?

  98.34: In the accompanying circ6i,zw)upks2 zj5ab7 w uit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply i z,wzu6swa)j2p7kb5 voltage V?

  97.27: Three resistors R1, R2, and R3 d+261w4q agoom l oabt+k) mao-u)jy1are connected in series to a battery. Suppose R1mldg6b y)+ 2w+q) a4aoomo1u -1jot ka carries 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 are c k3dhv )7 g8aqcxucwu.5p+:gkonnected in parallel to a battery. Supwukp5c +7 u3)8ckqhg. a:dx vgpose R1 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 vm tb8vf08t;j0k6p5o. c hzbsnolts. What is the maximum value bhjnvtb85z pft.;0 s68mck0 o of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb desie 2xcaq1t;n6 m8k)pbxgned to operate at 120 vobncaq exx1 t8p26 m)k;lts?

  03.09: How much current flows through a 4 ohm resistor that rvr en ,cg 6*8;afi-e,zlvja ((l9t iuis dissipating 36 wat i(fc ga9;erjua*- 8ir nv lltz6,(,evts of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.” I09x 3b 13yuc slda8p(3xh ilekn normal use, the currentlkl83phsi3 93 xuyxa0b 1(edc in it is

  01.05: Which of the following resistances could NOT be 5gns*l /-6kg u i6misp7aeo;wproduced by a circuit contai-w/ae o lpg;67si6u* gsnim 5kning only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the foll*-owm9 7ss vjlowing equivalent resistances CANNOT be produced using am-j9vss*o7 w lll three resistors?

  02.06: Three resistors of different values can be connected together in differen;jb jlpw/x onzy7-hc) +rqj5ad- ks30t configuration-spljqc xdbw n; +azj yh 7kr/j-5)03os. If all 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 ,1 nza2ddxqpzs j068gt)j lv* a battery, a total power P is dissipated in the circuit *lnjq)a8jsxv0 1zgd,pz2d6t . 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, are ctr07w h;n2ypivz z2x/ onnected in parallel, yx/rvh7win 0;zzt22 pthe equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is design s95o0fjlp qg3l8w/ iuutr)6bed such that it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of timebs6/t)pi9 w0ugo8r jl5 fu 3ql that it would take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flo( -jvzr )kgoz9k- :hco gy8iw9ws through a 4 ohm resistor that is dissipating 36 watts z)8kv o-9ck(g-r j:y9gwhioz of power?

  01.24: An electric heater draws 13 amperes of u-dn lx1qk5ufe.m/ m2 s k,5bpcurrent when connected to 120 volts. If the price of electricity k-u5fe xq bsmu p./5kmdl 12n,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 lh m2na,o (nz1s)1sqgbit continuously for 1 h1 z2 mbo ,qg)n(ss1anyear at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb resultmpbkp67484w l 4ropiy s in a power of 24.0 W associated with the bulb.7y 8ppwmk4b4 o4p6 ril Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts in ab0uc-cn b3l iak/q13 9dmas*x1j(aup 120 ajabcp9m/-cb d0 x n3 u( 1s*qlui13kaV 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 sametime?

  03.16: A 9-volt battery is connected to four res)gal:l (ng0wbjw 7 j/gistors to form a simple circuit as shown to the g(lj ngj0alg )/wbw :7right.
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 re1myxg7 hhr)a;yr mf mv1); *cnsistors to form a simple circuit as s17a)ymxchh m;fv* rng;) m1yr hown 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 7 apqu*bvznf0 9zin2+are connected as shown. With the switch open as shown in the dan+9 0uivzqf7n p*2 bziagram 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 amk4dy 7( v /(ahloo*f;ogwri-jmeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagrafogvk* ai dhy;4o(7ow (-l/rjm 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 switch24 6glsy/dsdxtc(cuj7 c l od2b.fr8 7 and three resistors are connected a.sg2 4ry2t fojb d7dcc7(dxl/ u8slc6s 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?

  12.14: For the circuit shown to the right, what is the equ/ 5kqkp7e yh;kivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have id5yh;e7k k pq/kentical resistance R.

  09.07: The equivalent resistance 42 l8bos*pqhuof the circuit shown to the right with resisl bo284supqh *tances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows f2; oqs;p74kuqcr.r4xt xk,4pv,rk e five identical resistors connected in a combination series and parallel circuit to p4 rs4rpqtv4x uo;.rkqe;,kxcf7k2, a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below sho;9hszn n/bi f*ws five identical resistors connected in a combination series and parallel nsn* fhb/9;zicircuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of 99etb nd lm /o6cmj3v gh6w*ui( +ic4uthe bulbs are identical. Which bulb will be the bri+w vm6i/ecol(ubjud tgn3649ihc9 m *ghtest?

  02.21: An ideal battery, an ideal ammeter, a switch and sz.5a /)cr*f r/qpzw othree resistors are connected as shown. With the sw wa5 /o z*fqrz./csrp)itch 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 switcpsp6v- o x2vr;h and three resistors are connected asv ps62xpr ;v-o 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 idears/h tu+oc.7z) jm y+sl ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the amc )m.7u++ /zj sthysrometer reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?