16.09: In the circuit shown, an electric currenb+m 1b:p(cfpet exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor mf:p c(1e+b pband the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected ind)c ai/xh)3: xdk5orz parallel, the_________each resistor d/k5 d ) z)rah3cx:xiois the same.

  06.33: A current through the thin filament wire of a lightbul;yu uecgmj((- b causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens becaus(- c(gu;yujmee

  13.08: Some standard household lights are being replaced witl ivihg1gb)+ug*d/zj8 g3n m0h LEDs. LED is the a g u+h3gn lg8* /bg0jm)vdizi1cronym for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional arg ad:9,3j-pn.m br vzvea A. It is to be placed into a circuit, but it first must be cut in halfj.prb-mvgad3 9 zv, n: so that 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 x yey3rvx0qa;e)v6*j/5l6 4retn m homade of the same material. Wire II has twice the diameter and twice the length of I. If I has resistanceh/j ner* 0vy6r xqx4a m36;e)el5otyv R, II has resistance

  99.31: Wire Y is made of the same material but has twice the az08g dbg7ae.diameter and half the length of wire X. If wire X 8e0bgda 7zg .ahas a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and ah78f00ktsvt radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens 7k8ftsa0 0tvh to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a bk gc pc*(aa;a 5jkoo01 xtyy82righter light bulb. He decides to modify the filament. How should the filament of 1y8g ok;2 tk*capojac y (0ax5a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resi s*7*aoi+ ;fzbgt 1ldystors are made of the same material. The length and radius of each resistor i7o*dblt;sf*y +g1 aizs:
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 resi- )wzf*aorq 13-ch jue2f d4yystance 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 equivahz*fj u4dc)fyqoe-w-3ya r21 lent resistance of this arrangement of four resistors?

  95.35: The voltmeter in thp:h. k6dph+f4 :keve ge accompanying circuit diagram has internal resistance 10.0 kW and te p:g4d6hv+ kf.kpe: hhe 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 f ,)wp4) ug0 0hgcd gu)1hxbomto the right. The three bulbs 1, 2, and 3 - represented as resistogu f4chx)),m 0)hdgp b0g uw1ors 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 ts3 3.0h ma1bgkppx7kxovze 12he right. If the current in all three r 3kapkex 3bv7pg.2zo 0sx11hmesistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electr v18rv psk)f 7cm+:lxhic circuit composed of 5 identica7vc )f hm 18lrvs:+pxkl light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following v/tjx e/q8 . 9skh5hsz t+9rlustatements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resisrj5z9stxl 8ek.+h/ut/ h qvs9tances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bu)3qr2ze0;xchf12giar tbu5 a ml u-4 : *onyqklb X is brighter than 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 on r y:2fqlcagr2*1b4u-h0kq ;tx5 ze3a u oi)mbserved?

  06.34: How many coulombs will pass throlbwu2x6 0d,6 ia;y76wovqmegugh the identified resistor in 5 seconds oym,;ww0e 266d76aux volibg qnce the circuit was closed?

  00.23: If all of the resistors in the following simple circuitg-8/ji e87 ( dknzjbtn have the sameg 7k/8j- bn8jt(dzin e resistance, which would dissipate the greatest power?

  98.34: In the accompa, o)u rpx)qlkhvdv8-+nying circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. )+vhkp8 lxru-vq ,)od What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a z6o w 5gqo/x( uhu0y.0b yji6vbattery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 disuxyyw0 0v j6o zgqb6(ho5.ui/ sipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel1mb b-ty bbp:7hm rc/)c 3fxbs*4tao* to a battery. Suppose R1 has 2V across it, R3x:by) op1b/m * 4 t*7f-rcmsatbbhc b2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is the max5b+we+mj6pa hrp(y+, ufc3tm imum value of the current under these ch+ufr5p , 3 6++wa(emtjypbm conditions?

  99.23: What is the resistanc goh qj7gn;j0k98cr +ue of a 60 watt lightbulb designed to operate at 120 vo0 ur;c j+ g9nhq78jogklts?

  03.09: How much current flo) k0z2fxk4t* *p8 uhfdihyt.aws through a 4 ohm resistor that is dissipating 36 watts of power?82fuk* z p* a hxk.h4d)tytf0i

  05.21: A household iron used tm+yo(x. //p lqg5vd zco press clothes is marked "120 volt, 600 watt.” In normpvz /m(cd+5lg/y xqo. al use, the current in it is

  01.05: Which of the following resistances could NOT be produced by a circuitjnni +0;a ky+p5 z)qx trvs-5s containing only snk ;y+ 5nz)qtv-a5jsrp+0 x ithree identical 6Ω resistors?

  94.37: You are given //ejdssl lm5* three 1.0 Ω resistors. Which of the following equivalent resistances CANNOT be produced using all three ls/mj 5 le/d*sresistors?

  02.06: Three resistors of different values cai1 zv-q(q p9ygn be connected together in different configurations. If all three resistors are used in a circuit, how many different values of tg qqi9z(v1yp -otal resistance can be produced?

  97.35: When a single resistor is connected to a ks g8fo*sctr82 t60orbattery, 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 8f0 r tsckogo8ts6*2rsame battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connected in e.d/aft uz omz2 d(y61parallel, the equivale6a(e u1dtz2z omy/f.dnt resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that ife*fed mts1 0h9a p1i(t has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg 9( et1s0df p*h1ia efmof water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much currentgl,3pz q5t1lr flows through a 4 ohm resistor that is dissipating 36 watts of ,llt q3gz51prpower?

  01.24: An electric heater draws 13 amperes of current when connected to 120 volk pnwug6 j 07)+jhkm+sts. Iu6j+7jg 0pw) n mkh+skf the 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 v dyzhz+x+q( /, lsr5k*dt(so cost to keep a 100W lightbulb lit continuously for 1 year at a rate of s +(yvr*5x(lh+qs/ kzt,dzo d$0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulf4x*ax+w* sotgv w 99lb results in a power of 24.0 W associated withof x+4* wgawsxv99 *tl the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts in-cl8x;,*tws be trvp xk7:5bll :1 dsy 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 compustre;,slyk x v:* 78lx:tc 5lpbwd- 1bters can be operating at the sametime?

  03.16: A 9-volt battery ojw* )9hcqz5 s i g:-ijyv38;c5 egigyis connected to four resistors to form a simple circuit as shown to t5 5i jgvo 8chi)yyigj3 s*g- ;e:c9qzwhe 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 conyj e obv6(*oz;nected to four resistors to form a simple circuit as shz oojb*e(y 6v;own 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 and three rsi owrpr-- 3,crax,e;c nr*c:esistors are connected as shown. With the switch open as shown in the dianrrc e,oa x *icr :rpc-w;-3,sgram 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 ammeteru)vc* 3 ulxt6c, a switch and three resistors are connected as s)u x6vuct*cl 3hown. 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 idtplggi.pfmt :f7enl :/, g .e5eal ammeter, a switch and three resistors are connected as show.npp.g : ,/l tm:7ig tg5efflen. With the 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 isr h+kzyfns a 2,4r fk7p;hx08p the equivalent resistance? Assume that all wir0zak,yh2f;f rp87sh x4p rk+nes are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistanc / 4 t6bazb0r7,hanjuge of the circuit shown to the right with resistances7 an/r u4btbha0j, gz6 $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shqavs(z . g *ul+(pewkx *xd.v6* t7q/t/ztkabows five identical resistors connected in a combination series an*q gs(q.t/ a x.* l7u(/x+zdktvw 6 tapvezbk*d 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 t4n5u92 qn sifconnected in a combination series and parallel circuit to a volf95i s4nu qnt2tage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Which blh (th 6sd4bvc ey 7ei-l.x:*lulb will be the7bi*4-t6 s e (e hvyl:c.xlldh brightest?

  02.21: An ideal battery, an ideal ammeter yj +zn+v n/sdbml/m;2, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter r /mv2zy ;++jl /msnbdneads 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 resistojl8ze.6i qv+ vrs are connecj8qiv6el.z+v ted 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 resistors are conzqakj5 2 qd6m*cv*w3snected as shown. With the switch open as*qzm53cqw2s 6 av jd*k shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?