16.09: In the circuit shown, an electric current exists in the metal resistor 7w5kjy9: hfdd connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor9hwkf y :djd57 and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_________each resv,m-s/ oq ;llih5cwy- istor is th iqwo;lh/-, svmy-c5le same.

  06.33: A current through thw(8f m( xs8imje thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much coo 8 s(8mmfij(xwler. This happens because

  13.08: Some standard household ligt aj6mxi y;,x5hts are being replaced with LEDs. LED is the acronym f56amyi ,jxx t;or which one of the following choices?

  05.16: A cylindrical graphite r5ss7whk1.3hx zesm z25w-vxp un)qc1esistor 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. What is the ratio of the new resistivity to the old resistivity of the cylindrv5whu1)z71pkehsmsxx s.-5 c qz3 2 nwical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has twice the 6imkf2k ;v1b udiameter and twice the lenivkk ;fb26u1 mgth of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material buk1y2wo-d:anczt/q oompze.a: oam.,ua026v t has twice the diameter and half the length of wire X.6/01q2ayv2oo zkt,:aampo da: m . u-cozew .n 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 of materialzewyv)* 9g m.f is then drawn so that it )*9vg. em ywfzis a cylinder with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He dec-9+icpa,7 . k3to1 cip cesyeyides to modify the fiieck +-1c9 sp c,p3te.oiy7yalament. 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 of tou2i4v +x+hdr4pawasj *g0tg h 4 v*y6he same material. The length and radius of each resistor ihdaa*ggvtur *wv4j 0 42piyh+ x+so64s:
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 rajtb)5 f24w5t i6mcbz esistance 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 inb4zwa fj2i c ttb55)6m series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompancw vks: o.)d7i b3t.il1zu( csying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammetek7zl.i. s13)(vwdictbo s :cur reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The *cj6uf a 9*wrfthree bulbs 1, 2, and 3 - represented as resistorsf9cju6 rfw**a 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 simpnhd,qv0q) ,xt5* t +0 ehoftpfle electrical circuit at the right. If the current in all three resistors is equal, which of the following statements must be )q0t +,hhqendf5t*tvo fp ,x0true?

  99.37: The diagram at right represents a simple electric circuit cqkz4o8)h h +xif,n9nfomposed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bulbshkn,8fi+9f 4q )zo xnh)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerninkd+k2-n8 (auubxm9 g ny uw7;kg0tsu1g the simple circuit shown whem8uas 1nu+bkgd;9wyku2k(g-xun 7t0re resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulbh*s: mkt 1ubl7 X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andu:* sk mbt71lhY 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 couyqav4ee j4h89lombs will pass through the identified resistor in 5 secondsvqyj49e4 aeh8 once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit h:9 w/eet5w9*spnehyq ave the same resistance, which would dissipate the greatesee5s 9eh t9wwq :p/yn*t power?

  98.34: In the accompanying circuit di/0ep5 bq y2aaiagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply voltayb2p/ eiaa 5q0ge V?

  97.27: Three resistors R1, R2, and R3 are connected in seriebg r r13rzwd* -*4whdsd.u h4ts to a battery. Suppose R1 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 Rzuhd h44rstdww.rd- *gr3 *b13?

  99.40: Three different resistors R1, R2 x9shu27nkv (candR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and snu2k(vc97x hR3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is the mia1 khub7e )zn3j(y,7z qj +mkaximum value ofz 7j 71,nqa(i m jyeb)h+kzuk3 the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb 1v,pw 6bx )ejjaarvds+n+,5r designed to operate at 120 asb pj,rwad)5n+vje,6 x+ 1vrvolts?

  03.09: How much current flows through a 4 ohm resistor that cgsk-i)sqfw 5+1nid. is dissipating 36 watti- g.c15+fsk widn q)ss of power?

  05.21: A household iron used to press clothes is s12*f ( j;s a b8 8,warpym+seix4omxnmarked "120 volt, 600 watt.” In normax8 (aas8+y 2i*xp ewbs4jf1mornm;s,l use, the current in it is

  01.05: Which of the following resistances could NOT be produced by a56p x auqcp,9z circuit containing only three identical 6Ω resistorq,apz96uc5 xp s?

  94.37: You are given three 1.0 Ω resistors. Wh6nhuo hz9p)3m 2g +e,/ vfcqqgich of the following equivalent resistances CANNOT be produced using all thru9/hq,3 v +2gnpo fhmqezg)c 6ee resistors?

  02.06: Three resistors of different values can be connected togetheapij sm2zn(f:t3/vy.:m miw3 r in different configurations. mj :ptzym :n(3amsvw /3if2.iIf all three resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resvi6nk .x-p,xc(euuu /qr za( s o8l+,zistor is connected to a battery, 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? Assume the interna(psro6.iec(uvk+z -x,ua z/nx8 ,q l ul resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connected in 2vh 7 j,ppw w93*kui: 0xx3jkffk da)zparallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about :vp7zuahk k kj 9),w*j 23p3wi0xfxdf the resistances is correct?

  02.46: A hotplate is designed suc+f,us5 n2)wjd g:p6dv qwij, zh that it has a resistance of 12Ω when operati2dj,qzpf)ud gi: j5v+,wsn6w ng at 120 volts. What is the 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 frve 4dvz o*ez l5,9m3blows through a 4 ohm resistor that is dissipating 36 watts of vobdr5zz 9*ve4e3m l, power?

  01.24: An electric heater draws 13 amperez q)6q h0q5vwns of current when connected to 120 volts. If the price ofq)06 hw q5vzqn 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 m zjtm etpi1.3* 3k z*uj)5c6sbqz6vcto keep a 100W lightbulb lit continuously for 1 year azj6mmku5*t 6*q13zjspbz 3i.v ct)ect a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbuqk.18nzw1 hjflb results in a power of 24.0 W associated with twnk8h fq1z1j. he bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family xx, gz.fja4-nh d)qj( of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protectenahq xx4-j(.gd ,jzf) d by a 20 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt batterzs 1 uuakih:9+9srcml e7v:r8 y is connected to four resistors to form a simple circuit as shown to 7+u9e s:v a9:klhsr 1crm8iuz the right.
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.eyy;mau- 7y /kdt xi( to four resistors to form a simple circuit as shown to the rigx/yiym-. edu ;(y tk7aht.
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 swf kwax)5xa/ m,c)z gi.itch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter 5ga )m xxif/k .awcz,)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 co91t/)lkta,-izs d7 qqatl .dannected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes1tdi-laqa7 q z/ak.d9 )stt ,l.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ak zz+e ;ln,ih7g3bl d ,x v0uk3+(rxrxmmeter, a switch and three resistors are connected as shown. With the xk +h,lzedg(37zx0,r kv3+i;xrb unlswitch 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 sb)vlzur1r d kzr ::hmnr:lmr1p7rh0++sh.r- hown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has nlr:7 r .h1rkm+v-1h)lr:rsbmz0:+u nhdzr pro internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right witbmhrv4o3i:pm p,2cnl1.mkj i u 8 lj* (tcw3b5h resistancek .jclum18o:rmp h(5itwin ,*4b3c3 bl 2mjvps $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistz .e 4mll*v.ilors connected in a combination series and parallel circuit to a4lv*i z ..lmle voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows f9cejc7,f jw p-z -r3xcive identical resistors connected in a combinationrx -p73zjj9ccf ,cew - series 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 identif/o4b aabz-kg9 w5q ;scal. Which bulb will be the brightesbo4kba/-fqw5 z ag; 9st?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are connyxo 6 nnn(mtujzsnp;q)18 10 wl2jis6ectepn6)1 6ys x lsqi2zmwnj(jt0on 81n;ud 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 4wu;bsen 51vsgbo1l,z1 af r 6connected as shown. With the swz,w1avsl6gue1b or4s b1f5n;itch 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 ideaxe pql x9 9ukt04buoiq.yn 0+-l ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram tht9quon. +k9i 4euxq x0 lb0yp-e ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?