16.09: In the circuit shown, an electric current exb4ebq4lid x)c 4im1 7oists in the metal 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 electric field through the interior of 47o 4m )d1ixebb iql4cthe resistor?

  98.06: When any four resispuik72w; vo,i+dn+jr tors are connected in parallel, the_________each resistor is th7njuoid+ri;vp,k2+ we same.

  06.33: A current through the thin filament wire of a lightbulb causs1b ngz,5in *ses the filament to become white hot, while the large*g n1 si5nsb,zr wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is the yq1blole0 8/ sacronym for which yb sqelo 108l/one of the following choices?

  05.16: A cylindrical graphite resistor has lenim:5pxx +6xuz3jn+i c gth L and cross-sectional area A. It is to be placed into a circuit, but it first must be cut in half so thmc nxij+zu5x6: 3px +iat 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 are mad 8m w8sm:o:bwde of the same material. Wire II has twice the di bw8 dmmo:8:wsameter and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material blmg e wf3go gvz41k7,;ut has twice the diameter and half thezgm1 gvwgo; ,e 4f3k7l length of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece osokvu2*f; 9psf material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material becaus vskos*9p ;2ufe of this process?

  07.27: A junior Thomas Edison w7 rw-65rhw 7 y3mxpva xjnmw;z, 8uoy5ants to make a brighter light bulb. He decides to modify the filament. How should th wo-7axrurjxmmy 6w8n 3;57yzw v p5,he 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 of the same material. The length *vmyp7* 3x enzand radius of e *x73en yzvp*mach 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 resistors2;rv8v5ee4i .+ wmvryj3p 7i owalg.tocwi;8 , each of 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 set of three resistors is connected in series to a 8c5vr;wtaom4yo r i jegi73e iwv.p; v+.wl82fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the bysld 4j/*gwjv/5iz4y t4pt6 accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The am/ lpbiz4tj sj4 gdt/5y4y*w 6vmeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. T.:5utn*pkc1tbc5z*fdt; zz , ;ord yohe three bulbs 1, 2, and 3 - rep;p5k z* 5;t cy,truotd1:zcdf*ob nz .resented 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 9qf.mk5+hzt tat the right. If the current in all three resistormk5tqf. 9+t zhs is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric c 9f ep1y4*1l o 6rm5 ga;uh.wigggngj+ircuit composed of 5 identical light bulbs and 2 flashlight cells. Which b h i9 1mggjn g;y.o6pfle+g5rag 14*wuulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple cirkcow1ll12 l 1wzew; u0i4e, )ax qxxd,cuit shown where resistors R1, R c 4k02,l )xlww1o1l;,eq xed wa1izxu2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in se i*o49m ix sd6zk.74jbgkaf.j* xn4 orries to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel w9rjj 64xbk* df7.ik. 4s4 oaxing*om zith 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 i2(c:9r nnp27dohog- frp ops4n 5 seconds once thr 7ppoo2:f 9do2rnhnp(s g4 c-e circuit was closed?

  00.23: If all of the resistors in the following 3 y*xrt,cehl kn q;g)y,+d*cysimple circuit have the same resistance, which would*hr c)*+k gl y,y;ndxy3 ,qtec dissipate the greatest power?

  98.34: In the accompanying circehg)za6ee4 p)im( u ;iuit diagram, the current through the 6.0 Ω resi eem()ga6u; hi i4pze)stor is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. n-s)2nj8y lemrr(zp( Suppose R1 carries a-srj znl nym (28(pe)r 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 connected in parallel fx o,vj*ipopdf;5x 4- to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current o;*pop f-x d54,iv jxfin R3?

  99.13: A heating coil is rated 1200 watts and 120 vol2+l ogcc;kz7 rts. What is the maximum value of the current under these condit2o l;+c7g ckzrions?

  99.23: What is the resistance of a 60 slz.a( edro+n-2k.u d,ofdz(qp b 8,zwatt lightbulb designed to operate at 120 volts(d poqlke8oz z+s d.-r b ,2,dau(fnz.?

  03.09: How much current flows through a 4 ohm resistor that iq pb,zdid(;, v x+gk*v 5sn7cbs dissipating 36 watts of poq5 zd,v (nk+,sbg*ipc vxd;b 7wer?

  05.21: A household iron used to presnc ruhb-kppm3-z87f q.l )3lis clothes is marked "120 volt, 600 watt.” In normal ln)mu-hip .-l7qbrkcf3 3 pz8use, the current in it is

  01.05: Which of the following resistances could NOT be prb1 lq*la2:16uq.-s x2qgik vgu;r b ifoduced by a circuit containi-.q;2g xksbii*2ufulga 6 lq1 v:rqb1ng only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of t,w ia6*91vlir pu*km2g7cjb1ypwnc7 he following equivalent resistances Cr,pcuanw21g* y7*ki bvjwlim671 9cp ANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be ca62v -la h,dgq d*,htoonnected together in different configuratioa -hgv ,*a26 o,tdqhldns. 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 a batylg k . vj,b-p :b,uns22wz,zltery, a total power P is dissipated in the circui uz,b2b n-v2.kl,lw,sp:z jgy t. 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 R1.7c pvm psu a.t5y6 jbyk*(s/b and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the rea bp5sky./ u bp6jmc*ts.yv7(sistances is correct?

  02.46: A hotplate is designed such that it has a resistance ofzq m,o70 h3jst 12Ω when operating at 120 volts. What is the minimum amount of time that it wo 7q3s0,t ohmzjuld 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 dissipatt.y3,-dbof kc cnz0k )ing 36 watts of pckztdo.n0k,-) 3 f bycower?

  01.24: An electric heater draws 13 amperes of current when m:n0fylie o-2upw4 sc* o6q z6 wd1x2kconnected to 120 volts. If the price of electricity is w40wi - s xl zyekp*fd n26oo:6q2mcu1$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 li / om;ia2e r;egn26pzat continuously for 1 year at a ratep2 ;/zr eng;ai6 o2aem of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a powe ;cw(l btwi(k)r of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the )clw; it( w(bklightbulb?

  01.10: Each member of a v338;ti 8n iuub )hcmzfamily of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit prnb8uz ;u8h)3miiv3tc otected 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 resistors tz i *mz.1+sjtbo form a simple circuit as shown to the rzz jb+1 *itms.ight.
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 cih9gf +*eyxe. gdeh5co- zf7 j4rcuit as shown to *d54che.eo7+e 9-x zh gffgyjthe right.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, an i y+lpy-f7nh1h deal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads h7 pl-hyfny +12.0 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 switju09kwd9 )hdi9yzz - 0+ ahgysch and three resistors are connected as shown. With the switch open as shown in t wzh0jks+gyuy -9 dh)9i09za dhe 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(+p:: axflie za;jvo,1m b/so ideal ammeter, a switch and three resistors are connected as shown. With t+i:z jo;fa a,xle/mo:v p( s1bhe 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 equivxc15t. ibk4-b 2x jbofalent resistance? Assume that all wires are ideaikb t-jxb 4fx1 .cb52ol, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circ2xw zzo+s62cfh4by2 tuit shown to the right with resi4oz+f 6 yxc2 hb2t2wzsstances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistorsrpjr 63m r 6 1u4+;xo;srazalo connected in a combination serx1 rro;jp+a rzol sa;663m4r uies and 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 inba,qyzfo1*xm29 g.s k a combination series a2*k, ysob 1f q9x.agmznd 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 bulbspi5c5k,w v;9y5vcx qb are identical. Which bulb will be the brighqyicbc 5 5v;9vkwp,5x test?

  02.21: An ideal battery, an ideal ammeter, a switch and three resi3+w 2 hsdj/0nm(q7oqhixz(destors are connxmz w(7d0 i3dn/(hojqshe+2qected as shown. 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 resistors are cjsnc-cj4 5 mq;onnj -qn mcsj54;cected 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 and three r- aq,x8wqs qct.v z*y*xola*hf v.r/7esistors are connected as shown. With the switch open as shown in the diagram*7val ,csq /8vw a yq*x.r*h-ox tzq.f the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?