16.09: In the circuit shown, an electric current exists in the m jssqni74n8 qb: dyh25etal 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 hnjq47sd82y5 :inqs b of the resistor?

  98.06: When any four resistors are connected in payiby a4e qlyynj35 z6 7v10a+rrallel, the_________each resistor is the s3aqa5re4 yn+lyyy10 7bj v6iz ame.

  06.33: A current through the thin filamentlo7g)s2/e e2h. hvftw wire of a lightbulb causes the filament t h/hweof).7g2stle2v o become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replacxm0ue mr3-,a 9pmpr+eed with LEDs. LED is the acronym +- arm0p,e p3mm9 uexrfor which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-t3 2(jmyve pa8sectional 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 cylam yv8 2(3pejtindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has twice ttf(udr7brsot0 kq :wml 6/ 11khe diameter and twice the length oft6/mlk0b fdr1sw o7u 1 rtq:(k I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same mat5byp xc:z;9q *ev)im ferial but has twice the diameter and half the length of wire X. If wire X has a resistance of R then e xpz*f5;) mqbci9 :yvwire Y would have a resistance of

  03.23: A cylindrical resistor has lengthd+qe *1zf,hj1iudr 4 w L and radius r. This piece of material is then drawn,ewdhfiz1d u4r+ qj1* so that it is 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 brighty)osas t :n,2uer light bulb. He decides to modify the filament. How should the filament of a lightbulb be to,)nas :su 2ymodified 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 lengtw/)l+l 6,hjl4 bxhe8cj ,pfnz h and rahbhfx4el6)j,p+z / l wn 8lj,cdius of each 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 Ru9s( zwor- 0fv, 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 arrangement of four vzfo0r (- uw9sresistors?

  95.35: The voltmeter in the accompanying circuit di kkb7 90vrsq2,2d-n er4djmzoagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading iz720brm ds,9 4dok- qrvenjk2s most nearly:

  97.37: Consider the compounn;m2 v0s8 phvvd circuit shown to the right. The three bulbs 1, 2, and 3 - represe; 0v2vn8hmp vsnted 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 curph(et7,sqh.b o,6zexez rd*f9a2 /lbrent in all three resistors is equ/ol6ea z2qbr h7,*b.zx 9sthdepfe, (al, which of the following statements must be true?

  99.37: The diagram at right represent7v yrffnh:3.u6abkgnm3n; /e i), jqys a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which beun.h:k, j yf3fym7)griq;6 /an nbv3 ulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statemusm a)5n:4:n *syrafgents is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal reramf5::s n*sua)y4g nsistances?

  17.29: Two lightbulbs X andY are connectedwh f lycuhs)k -x7a s:m7o/5a h8sr92n in series to a battery. Bulb X is brighter than bulb Y. Assume all chh9h r s :5fsya2nu7o csk7-mxwl)a8/ircuit 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 wilgo+7 9 arfz)ztl pass through the identified resistor in 5 secoz o9)g+7tr zafnds once the circuit was closed?

  00.23: If all of the resistors in the following c6c9a zv3ojwfw n938(1ifa k v simple circuit have the same resistance, whic6 v aw18f9f 3a(jiozwn3v9kc ch would dissipate the greatest power?

  98.34: In the accompanying ):x2ivrg d4l2e q7rfd circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply volt 42d:d ivql)r7rf2 egxage V?

  97.27: Three resistors R1, R2, and R3 are c:q5(wafc oe*o /xweb+ onnected in series to a battery. Suppose R1 carries a w w5+* o/xfa:eb(eocqcurrent 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 to a bat a-mb./ji.34wdw/ (pgt vooofe7+tfztery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in Ro/tfte o vog m3.4ia7-.wjfwd+zb/ p(3?

  99.13: A heating coiliz5c7f7w d: ul is rated 1200 watts and 120 volts. What is the maximum value of the cudfl 5z 7:w7ciurrent under these conditions?

  99.23: What is the resistance of a 60eqo: 7 8x8bzg2+wpgszpmzw .4 watt lightbulb designed to operate at 120 voltz eg2 s7+8w 4mbzopxzpq .:g8ws?

  03.09: How much current flows through a 4 ohm resistor that is dissipati8vwwxyge :n9j1- ur( cng 36 watts yr-ng(1je :w8xv9w c uof power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 w uxb4b 23esg(4u tl1ylatt.” In normal ubu 44by (tl xs2ulge13se, the current in it is

  01.05: Which of the following resistances could i m ew2q*eeh+5)9fes-z p hs/nNOT be produced by a circuit conze e9en qfih+/ms 2s-*5we)p htaining only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following,k+i +it*1h;spol q bc equivalent resistances o* qih+cs+ blp,t;ki1 CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connect lw17upr(zyu 3+a r3vged together in different configurations. If all three resistors are used in a circuit, how many different values1al(grp3yrw v7u3 z+u of total resistance can be produced?

  97.35: When a single resistor is connected to a b dgso3j u s2/:*nopxz*attery, a total power P is dissipated in the c*good/u p ns2sz*3:jxircuit. 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 resistancespvbn3pat7 0rj,w d*6- b3u pi R1 and R2, are connected in parallel, the equivalent resistancupp,067jn3 v astb*drpb w -i3e of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resis(u5nh 9. at*d28 mzubilfyr ;etance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.2;.itbhyl* m( en5uazur9fd8 45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much currentx ej z*sl5/pjtl *ishd .5)mo1 flows through a 4 ohm resistor that is dissipating 36 watts of powe5 *pmlz/x)le.osd15ij*s htjr?

  01.24: An electric heater draws 13 amperes of current when connected to 120k1txnso1c z17 volts. If the price of electrixzt o11cnk 71scity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how muc/xhr)w+/otaa (kkd g qt9)hq3h would it cost to keep a 100W lightbulb lit continuously for 1 year at a dkath /rkw3+ qt9hoagx)()/q rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbul.kh 6l,x 5qrwfb results in a power of 24.0 W associated with the bulb. Which one of the following choicw lxrfq6k.5, hes best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computl-hjdd-bt2,ih (pd 2h er rated at 500 watts in a 120 V cdd,2h h-l2h-tpdjbi (ircuit. 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 resistors to form ab 5 zjx7y(v4 -sbbme/c simple circuit as shown to thsc 4y5mj7zbbb-( vex/e 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 connect)hvmyir8k(;p l)ra00b zy qy2t2xp t, ed to four resistors to form a simple circuit a mqyt(r0xt ;2 y)0bvrp )iazhk2p,ly8s shown 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 swit+yq.+5t(jnbsii zq8 x ch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reaq8.q+yt (i+zxn5bjs i ds 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 ammetec5mrd-pt ;-ad r, a switch and three resistors are connected as shown. Witmdr-t5ac p d;-h 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 adj 8l-qnza7ep 6 ig)2vnd three resistors are connected as shown. With the switch open as shown in the diagram the ammeter rzv8dga67)-le q p2i njeads 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 equivalent 7g*iei im0gsa 92 w-0ultn+s mresistance? Assume that all wires are ide s0+ewl 0t92am7-u gnm *isigial, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistanc/7;e)hiwf jb- j q*vntj44bbxe of the circuit shown to the right with resistancesvnt * i4w)j;/ bh b-4jeb7qjxf $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical res6bo6bm nc,b+b istors connected in a combination series and parallel circuit to n6bbb+o ,6cm ba voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five ide/e5/;p.lg.- dpnaa( nacfp zu ntical resistors connected in a combination series and paralec;./n.(l-p 5f u/nppa aagzdlel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of thwsp s)t6: vw(we bulbs are identical. Which bulb will be the)(p s:wv t6wws brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and thre .g2xqn8ice.v e resistors are connecteg2.8iqn.ev c xd 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 ide ozd z897/ls *2b7tudgxo.jrqal ammeter, a switch and three resistors are connected as shown7g8 97xudozdozr. j qt/*lbs2. 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 ammetvv q9usz1yt:b8qc,/a*mk i3al h p6f,er, a switch and three resistors are connected as shown. With the switch o3lcvp8t zhm saqv9b6 i,*uf:q,/ 1yakpen as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?