16.09: In the circuit shown, an electric current exists in thd/6a+m9nuye + azap3b e metal resistor connected to the battm+9+d6a3 u/pz aeybna ery. 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 the resistor?

  98.06: When any four resistors are connected in parallzb ,eb y:6 wvs9ce.t 7ispa 00jmx1b7bel, the_________each resistor is t1asbp7 stib.0ecbmyz, w :je7 90 6bvxhe same.

  06.33: A current through ttexwxj; m.itq i(avko*:g-- (he thin filament wire of a lightbulb causes the filament g -tji-(;xi xtkw m*q.oa(:veto become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lb1t920wo :bphko ly*v ights are being replaced with LEDs. LED is the acronym for which one of the followiv2o 1ybk9*plt w:hb0o ng choices?

  05.16: A cylindrical graphite resistor has length Lqx:10mia0j4 yt 4glg n 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 thlmgi00 4y4:xq1a nt gje cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has twice kj3h0z8a0acxy eg d+4 the diameter and twice the length of I. If I has resistanz0kyj3a gh8 0x+ced4a ce R, II has resistance

  99.31: Wire Y is made of the same material but has twicg gdxv+o4g 9sf:(ncz;z 6id.he the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would hav9nhxic f;dg+z ggo( v6d.z4 s:e a resistance of

  03.23: A cylindrical resistor has length L and radius36op nmi;t2j)zef9qf r. This piece of material is then drawn so that it is )2 minj t;3oqe6fz fp9a 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 decides t paqo7s q),(hhmpwnc;vuk8 7 6o modify the fn(s)8pvhuk76,7a; cwpqm q hoilament. 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 )h9 pn0mqdaq6of the same material. The length and radius of each resi96q0dmpqnh )astor 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,ls)zvg5 0)yd-s .apjy6taayu55 fcy- 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 fourth resistor.” What is the equivalent resistance of this arrangus.0js yy6-ga v) 5f55 dp ylza)ac-tyement of four resistors?

  95.35: The voltmeter in the accompanyi6+1 q8dbutrau ng circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeteu8qb udr6a+1tr reading is most nearly:

  97.37: Consider the compound circuit shown to the rkihb 8wcr.5y( *)afbi.ws s;j ight. The three bulbs 1, 2, and 3 - represen( bc8a. i5w ; hkjfwiyb).r*ssted 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. If the currei5pqibzv*+eq b)02 f ynt in all three resistors is equal, e5f)bi 2*q0zyb q+ ipvwhich of the following statements must be true?

  99.37: The diagram at right represents a simple electzl ch-p51a f1hxg1/ (y somv1 .noj4v:1t jdmrric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bu1o-h111yl4 j(z j .o v/g5 p mhadx1tvrfmcns:lb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple circ t8c6eh-,dpryuit shown where resistors R1, R2 and Rh,8-6 dtycepr3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a batter4n z,r,bz3sklb; l 9zey. Bulb X is brighter s;lkz,bez9bz3 l ,r 4nthan 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 observed?

  06.34: How many coulombs will pass through the i qlf-qekpx: 68dentified resistor in 5 seconds qf:ke 6-lx8pq once the circuit was closed?

  00.23: If all of the resistors in the following sig jsyf e16mv;8mple circuit have the same resistance, which would dissipate the greatest powj 1;yf6vme8sger?

  98.34: In the accompanying circuit diagram, tl9 f tgj8,8pfehe current through the 6.0 Ω resistor is 1.0 A. What is the power supptf e8,lfjp 98gly voltage V?

  97.27: Three resistors R1, R2, and R3 are gvl 53 vl +x5t(:ub*wi-k-p qylqz rpwu4pw* +connected in series 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*rp 5gux4kw+lz pw+* wvy(vbull tq5:-q3i -p is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to ao++sglc. -zwp p bz,q; battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W+zp. gzqob;c+ lw-sp,. What is the current in R3?

  99.13: A heating coil is rated 1200 wategia6h 4 qgh0y3vplk*.(x: t9grv dh6ts and 120 volts. What is the maximum value of the current under .6a *hx:94kg y ph(0vdli3g v6retqghthese conditions?

  99.23: What is the resistance of a 60 watt lightbulb designe:/8i 76en3c t c)at6n/(zkcs 4g iptq1juonx qd to operate at 120 voltzjq c3:1gcs6un6/aqkinti/8x tcto e74 p(n)s?

  03.09: How much current flows through a 4 ohm resistor that isa - b73jqm6n qaa7-ccb dissipating 36 watts of pow7nma- b qc63 c-ajba7qer?

  05.21: A household iron used to press clothes w/vgde6jo9tw.o ,:jzq-y3 mj is marked "120 volt, 600 watt.” In normal use, the current in it /te9z- o:w 3j,v owy.mgjd6qj is

  01.05: Which of the following resistances could NOT be produced by a circuit 8n9zb/x afay -jq.n2f contabq fy8n af-azj/n2. x9ining only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivabros86 pwd3 j/lent resistances CANNOT be produced using all three resist o/wr6sdpj83b ors?

  02.06: Three resistors of different values can be connected toget,c flh*x)qw,g her in different configurations. If )*lg,hqw c, fxall 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 bae0umirn f*0 5b8; cadjttery, 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 n j8md5*f bri0c; u0aeusing the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance +qq78qt.k spcx 1x)1kkpxq m:R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . 1k 7xm:q 1psk8 ktqx)xpc.qq+ Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a+o * lwuke* -jj-f(gjx resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg of water-we j-+lu*jkgx oj* f( from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissipatc,uv.a1z;rsa a14w ;7 dfu pwling 36 watts a1af7ul14,zvcp;a wr uwd;. s of power?

  01.24: An electric heio ;2swq3j c--qex 7uiater draws 13 amperes of current when connected to 120 volts. If thi2 u c7 qqw;-s-x3ijeoe 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 1hsv+v*(xe+o vvo)b ./l r5vu o00W lightbulb lit continuously for 1 yehvo(l.ov +oesv)*x /r vu5bv +ar at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb re czdz10eg* uo*sults in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lightoguc* e0*z1dzbulb?

  01.10: Each member of az)vkei/vpo1mth)kn4 m1)jlzf ; j)5 e family of six owns a 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 the computers can be operati)z1hle)j/z ;mp) n1tvf4k )eiokv 5mjng at the sametime?

  03.16: A 9-volt battery is connected to four re ;hk ieff:25.hs7hg qk ql8t4isistors to form a simple circuit as shown to the lffi .284 hs:5qhth ;eq 7gkkiright.
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 7 74tf,bdpaqp 5ze-whform a simple circuit as shown top7dzw 57 tpeqaf ,b4h- 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 swie/v d ,*lat: ba3:wlzrtch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampeztde* b,ll vaa:3/ rw:res.
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 resist p5tj;dvw*v f6qvknr2 5)ey-sors are connected as shown. With the switch open as shown in the diagram the ammeter re k)e5 n-wp2 5vq6jsyv;trf*vdads 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 resistors are c e6 dhr3cbks.so.9xb2onnected as shown. With th b39rk x2se.cobd6h .se 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 7( h:dfxevny(right, what is the equivalent resistance? Assume that all wires are ideal, th:fx ed(yv( 7nhe battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with ri 3dnz3w/r3 a/ /lmywkb xoehx9 0x.f)es do9yxnekl )f//wz0/b.mr3 3w3 axixhistances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a coph:eybw0m/-quttto*v:9484ig u9ua l nm y2a mbination series and parallel circuit to a voltageutyy uit eoa wlq-/8mbt:nam:g994 p 40 vh*u2 source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a com:b0i7ll z)ugnoszd/ t6/ 6rtabination series and parallel circuit to a voltage soul)ugltr:in6o 67/ a sb0z/dz trce.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all ofkg-jdrwfgg7., fw.o-3 a jq/t8.n 6gy0 hcxwc the bulbs are identical. Which bulb wd aq,yc8w-. jjf..06xrwg7n3kot h fcg/wg-g ill be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch )mfg.pf- t3 bwand three resistors are connf-w3 ptf .gb)mected 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) n/zo;-olx;l1uvezh fen(5n3u lw)n , a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter read (lfn-euveo/nu zo)x;nn )w ;1l 35lzhs 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, n,u)+r*/ qxkvl(7wbc- 6 xi5v b rbc nqt*no7kan ideal ammeter, a switch and three resistors are connected as shown. With the switch,br* 7cqxxb n/ kr5ubv-kicw(ot7n)+v l*qn6 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?