16.09: In the circuit shown, an electric current exi,bx;vboj g(, gsts in the metal resistor connected to the battery. Which one of the f g, gbbvxoj;,(ollowing 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 pa2eo 2/zy4.fxs 0rb ugtrallel, the_________each resistorb0. s r4/ gufytxoez22 is the same.

  06.33: A current through the thin swj1, ht5tc: lb(tis 3filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remainish: wt, cb53tj s(l1t much cooler. This happens because

  13.08: Some standard household lights are being / y foz 1*tuk)h8k2vq+iclio +replaced with LEDs. LED is the acronym for which one of the following chof/+8uhio q+tik zlvo2*) 1ky cices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area nyt(-kvvwe6lj-iymf j 7 ,+w1A. 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 tv-,k-nf l6 (tvy y ew1w7jj+imhe ratio of the new resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II a0y.j9 m3sbeuts) hw kh)u8c*lre made of the same material. Wire II has twice the diameter and twice the length of I. If I has r.)* u jw3mtl ucks8y0s9e)bhhesistance R, II has resistance

  99.31: Wire Y is made ofzb)i 8l5r6 1x ut)yrcu the same material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a resistanctru y1)zbr856li) xcue of

  03.23: A cylindrical resistor has length L and radius r+ qh, s2uimxf 53;oc u9t;zkjl. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material becauui9t+m sq x;;3uk 5fzhc2,ljose of this process?

  07.27: A junior Thomas Edison wants to make a brighter l,h97o -wsirw )p5 wgt: ti5jpbight bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more ligs 7w5ii5:pjt9- wrbwhtp o,)ght at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The length andz+ft2z qyi k2t)knb:4 radius of each resistor iyz4iqk: n fbzt )+kt22s:
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 0svg,qd 0ltbt p,9 ge r-w:zg* .rdx3wR, 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 resistotpgzl d3xwsvq,:.* ,0w0t9 rg d-be rgr.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circu/bo/( g+;1xvrhknskn it diagram has internal resistance 10.0 kW and /b;+hrkv (gx 1sokn/n 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 right. The threc hzsw:k,5) lr kkh*5ve bulbs 1, 2, and 3 - represenz )lc hv:w,kkrk*5hs5ted 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 ce)9zpt:fns8 ie a.tr+omrw8 i9u4-:.qrutkzircuit at the right. If the current in all three resistors is equal, which of the following statements must be truer.w8:-if9.+rk :894uzrtso eemutt zpaiq )n?

  99.37: The diagram at right represents a simple electric circuit 9clthv.l k1(t1nga)7 dqshm* composed of 5 identical light bulbs and 2 flashlight cells. Which bul) qd7 *h1cgn sv.mh(a1 tl9lktb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true conc,a x hd + h3kplx1fpp+17kagw-erning the simple circuit shown pw lx7 kf p3+11+kpa,hdg hx-awhere resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected i*d7 ztxh722kq ivw4rbe;s ig)n series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY ahi7tz kiq27dwbgv ;)es2x * 4rre 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 identified resistor in 4i/oi dtog ;kpa1b1,n 5 seconds once th knato ibp ;/di1,go41e circuit was closed?

  00.23: If all of the resistors in the following s8 0vuo go.l vip95cm3qxcu5t 3imple circuit have the same resistance, which would dissipate the greatest power? p5i3 0ctlvcuq. x95go v o3m8u

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω redjkuk / y3m569niz4jzsistor is 1.0 A. What is the power suz k/km4yd5 69unjj i3zpply voltage V?

  97.27: Three resistorsqx+4lu,g g ffs1cbo, j 7r4bx; R1, R2, and R3 are 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 is the voltage across Rqfc1;bsgfu7x 4o ,r, 4jl+gbx3?

  99.40: Three different resistors R1, R2 andR3 atx yi9ft:;h m eh:b*h;re connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the curr*ye9 t:ft:ix;hmh ;h bent in R3?

  99.13: A heating coil is rated 1200 watts and 120 volnk7c9eri2px ag0o6cwd1 e)xxbf+ l;1ts. What is the maximum value of thi xel fr)dn 16eb7xa1g0 +2wpc;k xc9oe current under these conditions?

  99.23: What is the resistance of a 60 watt ls q: qqvx-61tuightbulb designed to operate at 120 volts qt1-qvsu:x6q ?

  03.09: How much curr (ospky;x 2n+zx 7dhu7s4gv5vent flows through a 4 ohm resistor that is dissipating 36 watts2gkzo;sy7 svvu75 (xp+4 xhnd of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 wlls*y de8w 9pj2+n;m*)x oeovatt.” In normal use, the current m e+wl)ol9n*p*sxv e8; yj2odin it is

  01.05: Which of the following resistances could NOT bex /wf7 k5jcnb0 produced by a circuit containing only three identical 6Ω resisto0xc/7nfb wj5 krs?

  94.37: You are given three 1.0 snn ql.9pb+3v;fgxj/*k s /o mΩ resistors. Which of the following equivalent resistances CANNOT be produced using all three resfslkg/*3n bq.; s+m opxj /n9vistors?

  02.06: Three resistors of different values ca0x8rs o2aaizmk uaia/fc,u 3 9b)j-g-n be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance canrax asaa iuzm/-fcg 2u038-oj ),b ki9 be produced?

  97.35: When a single resistor is connected to a battery, a total pow;ccf9l)enhh (vx2 , je)6gkr rer 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 internal resisj x;n9 2ckh)gv6fecerl(h r,)tance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connbktrv9c91q p 8ected in parallel, the equivalent resistance of the co9b1qv pt9kcr8 mbination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when o (4iy)f/ *xc-z wpmfrxperating at 120 volts. What is the minimum amount ofz *-(4xrxc)fim yf w/p 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 flows thkk6 pm:wi+ ubms )p3-yrough a 4 ohm resistor that is dissipating 36 watts of power?wksm )i+ :mpk6byu-3p

  01.24: An electric heater draws 13 amperes of currenv(1gwx mdyxd,/au9x9y +f0d;whq x . ct when connected to 120 volts. If the price of electricity i uwg9x;d x( qc,dydx+9.m0a1yw/ fxhvs $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 ligh+zflg.q l,h. ctbulb lit continuously for 1 year at a rate ofh zq,. .+llgfc $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through afh6mc g-v;e*sa2, cru lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resi ;esach,r6u mf -*gvc2stance of the lightbulb?

  01.10: Each member of a family of six owns ar+b.1 ks3 y wirur 3bjb)8mv6h computer rated at 500 watts in a 120 V circuit. If all computers rsri)3jy 6bb.ub v 3 mkwh18+rare 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 a d1 6i/pn7tj qb,fo: ousimple circuit oiqjd6b7:upn,1t/f oas shown to 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 connectejwy6 n(agkkow 4y:*n3d to four resistors to form a simple circuit as sky3o w:akg6(nw yj n4*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 anll 1om)a+tl9 nd three resistors are connected as shown. With the switch openl ml9+tl o)1an 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 areep;,caj (kn0kj)t fyaza )l)9 connected as shown. With the switch open as shownlk )n )p z;9taeajc)f(kjya,0 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 batte7w9o v0r va 9j1objh0fry, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampereshofvw7jvbo 9 1 r090ja.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit wr,y y9-z 2qhaq1r,hk shown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has n9qh-wyaz q 1,ryr2k, ho internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuiep9h 7dy:y+wuvw02pq dy)h kr0 zft ,.t shown to the right with resist0 er9h+q zpywkp.ddfwv: yht) 0y, 2u7ances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a com mpgv9yg fweay(n+r5;kb- 76z bination series and p57fbzwgme k ;v(9n- r+apy gy6arallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors conna awj9 s:35 gzz djw0*9ogk/ytected in a combination series and parallel circuit to a voljwk dg9ojwz9ya/0 s ag3*:5 tztage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of thep:/smbw v: c 5ld6h)db bulbs are identical. Which bulb will be the brightes/h d5l)d:bm:vw b6csp t?

  02.21: An ideal battery, an ideal am ms *dkv,i.ww5meter, a switch and three resistors are connected as shown. With the switch ,miw dw.5*kvs 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, a2ppo4nwcal v*p+, u-xn ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampere- vl *pp2ua,nocxp+4ws.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ohcuy0 3 )p.3l1pfqr:su* )6qehhb plideal ammeter, a switch and three resistors are connected as shown. With the switch ope0e.u:c hp6)1q b)fpu3rl*s oqhpyhl 3n as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?