16.09: In the circuit sm,poot r .9 clylw,)er4k2uy8hown, an electric current exists in the metal resistor connected to the battery. Which one of the fe 9t 8op2yry4cor,u ,. mkl)wlollowing 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 conne-xwyhfzs: x wt4xa/ +*cted in parallel, the_________each resistor w a:-txx4/+xfh*z syw is the same.

  06.33: A current through the thin filament wire of a lightbulb causes the filamept6 2j71yfwy ant to become white hot, while the larger wires connected to the l7w6aypj tf12y ightbulb remain much cooler. This happens because

  13.08: Some standard househol;cmkxcp.0ufl:wgpi+bs0/8k 1 /s navd lights are being replaced with LEDs. LED is the acronym for which onewups. /vpb/1kl 8:+ mc xk0s fc0an;gi of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional auelf (75qu ;wmrea 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 n5uq wu;m 7fel(ew resistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has tw3.hspt r n3tn0f0lr -uice the diameter and twice the length of I. If If 0h 3.srnttnlp-0r 3u has resistance R, II has resistance

  99.31: Wire Y is made of the same matere1alt fw7i g5*8ez j(xial but has twice the diameter and half the length of wire X. If wire X has a resistance o g8ee1w 5t 7(a*jfzxlif R then wire Y would have a resistance of

  03.23: A cylindrical resistor has 4p906i5cvd21 vc3ylvzc nie glength L and radius r. 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 because ofvvcg04c215d9 vp i inczl3ye6 this process?

  07.27: A junior Thomas Edison w.vbo0 rj64r.see -dm 7u.rfa/rz f4yc(pl2dbants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modififr.06r fare. lebb(dy 2 zcu7vom4p/4-rj.dsed in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same materiauj4v 7epxin/-cf,;dml. The length and radius of each resis;,cv-/nf 4ux7ipmd j etor 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 resistanxqymy+c5 dg 49j; m(gvce 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 5g(jc m ;m9q xy4v+dgyresistor. This set of three resistors is connected in series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying cioa o4dj.f* rj l*ra /dl*atz83rcuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voldoda*a*frl *a4 jj8l rto. /z3tmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 1, ovc7z *dteu;j; pn45 m2, and 3 - represented as resistors in tdt4m;znv e u oc;j7*p5he 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 c 9pd 9qy2p4hirircuit at the right. If the current in all three resistors is equal, which of the followid9pry 24 i9hpqng statements must be true?

  99.37: The diagram at right represents a simple electric circuitw(4 qgklg1(/ jtu2al g composed of 5 identical light bulbs and 2 flashlight cells. Which bgjl((21u agk wq/ lg4tulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the followinganfxy m*2y5eo )ba2w5 statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are hava*oa5ym2n ex) y25fw be equal resistances?

  17.29: Two lightbulbs X andY are 0zl/ wqe1dj0 zcuje 63connected in series to a battery. Bulb X is brighter than bulb Y. A1wj60l j3uec dzzq0 e/ssume 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 identified resistor ins7fwpt3o 3mfve c3++6ects p8 5 secsp+ 3+c cve3te86mfot3w7pfsonds once the circuit was closed?

  00.23: If all of the resistors in the foawraozazw5f 1oai3vt/6. +o b-hm7b *llowing simple circuit have the same resistance, which would dissipate the greatest power? o1z7 3a6t*. 5-o+bow/ z wbvfiaharma

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω re0zk+o b1l,i irsistor is 1.0 A. What 1iib,0rz ok+l is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. Sum/ zsp46 k-9jvzn*yqpppose 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 acrosps* ypkm6 /-vqz 4zj9ns R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to a bxc/wpn uf:) os8r/ byc 42d yn7eun,c3at/ufc,x 7ynbpd2 )3 cn8s:oy ew4ucr /ntery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. Wt7*cp8br)9tk v*x gjohat is the maximum va ogr*k 7v*jtt c8pb9x)lue of the current under these conditions?

  99.23: What is the resistance of 1kh t h2/ugj(b/pzpoe l+hvqyv3 -e)*a 60 watt lightbulb designed to operate at 120 gq)h 2/1u oyp+vlvthp/ 3h- ebz(jek*volts?

  03.09: How much current flows through a 4 ohm resistor that is dissipati)j7/tmbx++ *mlt,watxndlc:i- ) z iing 36 watts of polbd i)x inl+m/mi aj,tc+*:w7zx- )t twer?

  05.21: A household iron used to press clothes is marked "120 volt, 6h /jac t/nefe b-c8-d000 watt.” In nor cb/fjtnad-8-0ce/eh mal use, the current in it is

  01.05: Which of the following resistances could NOT be produced by a cir:r(2kd nuc l97dp1q rgcuit containing only three ircdl:9rpk2gdnq1(u7 dentical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistohcdon +p*hw ,dh-8( (rbb:atk rs. Which of the following equivalent resistances CANNbdtaw,hcnhob-k *rp+: ( h(8dOT be produced using all three resistors?

  02.06: Three resistors of dwtgm)*me:r3pjz tn( a*pph*/c 8q.3efvxl v0ifferent values can be connected together in different configurzhfx*) 8(*j m/nppe.r mpvv33cwteq a:t0*lg ations. If all three resistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor isi8gdnp 0p+vdn r+ph jn4 8n6h1 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? An81nhpjvpn dd 04n 6ig+r8+phssume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connected in 4tq4v :zdscqh(1f,n 5p *mxwbparallel, the equivalent resistance of the combination is 5Ω . Which of the following statements abox(w44qnt5m :*qc s,vpbf h 1dzut the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω wh- ema xt1dwb96en operating at 120 volts. What is the minimum a-t1 ae xm69bwdmount 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 flows through a 4 ohm resistor that is dissi(ig,wr:(gwjghc cz/ l0; d0i8d1 ljispating 36 wattss;izwlc :(8il 0hgdj cdr(g/wg 10i,j of power?

  01.24: An electric heater7(w;j2ax4pkcbh kwh+ dt-wo; draws 13 amperes of current when connected to 120 volts. If the price of electric47dtw j(hp- ch2wbo k k;x+a;wity 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 keepc u:)a7xi9 tpkt ps;v4yc, ce2 a 100W lightbulb lit continuously a24 )tkv;9 puc ,i xcs:cty7pefor 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 1f95d:p ts5nc;nq kcf-igd ogkx c 8;;A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices bepdi5gq5g; 1;t skn dxc :occf kf89-n;st represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 6 qb9qvcb-.gut /v2 obwatts in a 120 V circuit. If all computers are plugged into a single circuit protut6/ .9v-2qbqcg bbv oected 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 c vz)d- , z.zpbkhb:m-ionnected to four resistors to form a simple circuit as shown to the rigzk,m. zi b)--h:dbvzpht.
How would the current through the 2 ohm resistor compare to the current through the 4 ohm resistor?

  03.17: A 9-volt battip6ee u rcy,vh 67zz rny;6z/)ery is connected to four resistors to form a simple circuit as shown znrrz6 h, pyzeiy;6u e76/)vcto the right.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, azvppc f5t2nfyifx:m .8 j 2 dac:a;a9+n ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in :82;d:fi nytxcpm av5+jc za .fp2 fa9the 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*cxg h2o3;nvial ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 22i3ghv;xo cn* .0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter, avtjje(l)ik)69j+2x1v ostr d switch and three resistors are connected as shown. With the switch open as shown in therl )vov) dst91 jxj62+iket( j 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 to6,bj hbbc*6rf)k84p l thv+gc the right, what is the equivalent resistance? Assume that all wires are ideal, the batth6hk4b 6*b vc brl)8gf,j+tpcery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalentj0pthq mmjvba*u1 30( resistance of the circuit shown to the right with resistances 1jphjmm 0q 3vat0*u(b $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resi.+7z)zab7g d e0 ywtupbx 41zrstors connected in a combination series and parallz+r 0e )b7zuy.wa px14z7g dbtel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical1+jbn +dxm l6f resistors connected in a combination series and paf 1+lj+ 6ndmbxrallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, azwdyo )x fq yb2ltx8+g (rhi udp2.0,,ll of the bulbs are identical. Which bulb will be the brightyutq p ,2 do0f yx8g.w)xzhi+(l,2dr best?

  02.21: An ideal battery, an ideal ammeter, a switc5wba7 )c uy+:mxz+y zph and three resistors are connected as shown. With the switch open as shown in the diagram the 7 z) xbmw+z:ya+cpuy5ammeter 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)li9e5:tx i vy three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0xe9t5:ylvi )i 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 thrsntwu ;znlfcc8y7: -5hzx0l7ee resistors are connected as shown. With the switch open as shown in tyfuxt7c zlh78;n0: l wc5snz -he diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?