16.09: In the circuit shown, an electric curren.hxxffruu p13.6t3ebt exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow throu3ffxhp3x rbe.16uu t .gh the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_________ewt543p ,fj9 -mpfr agkach resistor iwg4 ptrf9 3j5pa kf-,ms the same.

  06.33: A current through tvd:uc*v1wd8 du 5v5cvhe thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to cwu dvvd5v5v u1 c8:d*the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced.) .:,3k6y8z6z(lzc- hrg: laxbgdgkfxy yf q with LEDs. LED is the acronym foq,)kydg:b xk3rf6fyhzczl8 lgz-g 6..: ( yaxr which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-secsncc z gf*osj 2swkb1;( b63q2tional area A. It is to be placed into a circsqsw3b 2ck1z2nf;os jc(* gb6uit, 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 cylindrical resistor?

  98.20: Wire I and wire II are made o gd(gzux 1 /9sdg4y6dxf the same material. Wire II has twice the diameter and twice the length of I. If I has ru /d9xsy g1gd(gzd4x6esistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter and half vl lg96u2gefv* ee 1 vg0 w07rwz8fs)hthe length of wire X. If wire X has a resistance of R then wire Y would have a lrhv zu1208sw90wv g6 eeg*v)g ffl7eresistance of

  03.23: A cylindrical resistor has length L and radius r. This punmygn7 :v:0tiece of material is thn0un y:: vm7tgen drawn 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 brighter light bulb. Helv:+tw6ehj e 2 decides to modify the filament. How should the filament of a li +tv:eej2w 6hlghtbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the sam ;pmux224 inioe material. The length and radnum xo22 pi;i4ius 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 R, are connected to a battery in hx zmmb6rk2( (wj tkd129 k5qethe 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.” Wh b6e1 j2t(5h9wmqr 2zkkkdxm( at is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying h4(ab zwm y6zszl84e2q/bkn*circuit diagram has internal resistance 10.0 kW and the ammeter has ia(4s8l4zn b62/zqwe ym*bk z hnternal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound ciryo :/p htb i3mhw dn0;m:)od5ncuit shown to the right. The three bulbs 1, 2, and 3 - ;oh bwi::d)5ydm p0nmt3h o/n represented 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 cu-kfjow3e b,5g rrent in all three resistors isek jbgf5-,wo3 equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit comp . /q,pdkno9llosed of 5 identical light bulbs and 2 flashlighl. pokdlqn, 9/t cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statemyc8.4ga :c dpql(v* gnents is NOT true concerning the simple circuit shown where cgy(vg4 a .8l: ncqdp*resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a batter3:o;f j zunvm*y. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are conv;*: 3fzojmunnected 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 2e u ws g93;:sk*8/zuthbdgsh through the identified resistor in 5 seconbgsh/edk8h sg3*u;uz92:tws ds once the circuit was closed?

  00.23: If all of the resistors in the follo7tk s0dit+cy7 wing simple circuit have the same resistance, 7ds7 tityk0+c which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the curren)u)je3 2 mccy0pli b7ft through the 6.0 Ω resistor is 1.0 A. )bpcyium03lfje) c27What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 9s kev/xw6 :gl8c 4wjm(dr7kid73bfa are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω,vfg43wlx d:r /97(jea kicswk bm7d 68 and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistor ayy7 cabd4l/oya:0 )ps R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it,claby:d a4a 0/ypo)y7 R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 v6xju)r8syjmy x1s q1: olts. What is the maximum value of the current ux 6)xm q11:yrs jj8syunder these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designeztucuk*(x 6 2qn)6;qfuxp e 5vd to operate at 120 voltsnq65 *x (kvu)cefx6 p ;u2utzq?

  03.09: How much current tl5wae +ij/ tc-q2rs(flows through a 4 ohm resistor that is dissipating 36 watts of poweri ts2rta/5qw +(jecl- ?

  05.21: A household iron used to press clothes is marked "120 voltkzhf7p, 822 anf)nuyv, 600 watt.” In normal use, the current in it iyaz82kh )2, 7uvnnfpf s

  01.05: Which of the following resistances could NOT be produced by a circuilk6b fcf zz-z+6ps k ;;s/mv:ct containing only three identical 6Ω resistorcm;fkk p/fzz;z:s+6v b c-l6ss?

  94.37: You are given three 1.0 Ω resistors. Which of thez s dnz-gmszxlqx/ ;ud5:g5/n /anwlt,kv +,9 following equivalent resistances CANNk:n z l-q zv/dtg5/;us+w9 /,maxn,dlgxn5z sOT be produced using all three resistors?

  02.06: Three resistors of different values can be ce,gwj,ls fu ss4p ikv q6n,)9orl5/,connected together in different configuratipiflvg ,96,s4ucjs5ns,klw, r)eo q/ons. 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 is connected to a battery, a total power P i vvwr(mfzj+lp ,-ay806(vac sr3brm: s 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 inte-rmabf3,y8 vrvr 6plc+sw(:j m vz0 a(rnal resistance of the battery is zero.

  96.16: When two resistors, having resista fgdw/mwzj ,5ml1gm8 v-go2-) 6oj fwsnce R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about oog zs-g6/ d,)w 2-gj fvw8lwmfm5 m1jthe resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when operati ;(9q/nup; oi bo3hw.q vgrkn)ng at 120 volts. What is the minimum amoun o(vq /nh.)wp3kunog; 9b;iqrt 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 dissipating 36 -/6e o +wa)nl ohdg/ m2v8dyvgwattsl8d/h ) +-gnyvgodmv6/o ewa2 of power?

  01.24: An electric heater draws 13 amperes of current when connected mb; 8 umd*u hkn+a*gi +j7zo5uto 120 volts nmd bzuhgo aj5 i*;8k+7muu*+. If 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 cost to keep a 100W lightbulb lit conti/f8,s tvi-;sk/ zz hlxnuox/l- zs 8fik;t/,shzvusly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulbeswa4vog5tj xqs- 2tt8 s19g9 results in a power of 24.0 W associated with the bulb. Which one of the following choices best repre g92st59st4jgtoev 1a-s wxq8sents the resistance of the lightbulb?

  01.10: Each member oa aey8g:be 54jf a family of six owns a computer rated at 500 watts in a 120 V circuit. Igy je 48baea:5f 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 ak.b5 +j7m09ev bqz zap simple circuit as shown to the right. k5. bq m e97jap0zz+vb
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 form a simple circuit*1 / (dzznps;zng-l wq as sl w d/*ng-nzs1;zz(pqhown 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 a0ohtl ) kk t+3s*bnw*49cix .otkcxy2nd three resistors are connected as s) k*xo 0lct2k.cb 3ho wn9ytkxt i*4+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, a switch and three resistors areq: ,r ab,aj.h8wmo4ut connem.q4 jr ,tw,ouabh :a8cted 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 idealz3hqjiweng 7t *w+4 l1 ammeter, a switch and three resistors are connec7 4nj qlwe+z*i1 wth3gted as shown. 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 is the equivalentc*f 9m1sbj.abq +mo q0 resistance? Assume that alasfo c.1b +mm9jq*qb0l wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shg v)r joqj 3v7kd 9hxxuinr3+bz +/z((own to the right with resistan r vqh ri()xd+ (+z9gj33bn/kxzo 7uvjces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors conn4np m q/uhvd ttpr:k .)j7a1(nected in a combinati pv(r 7qtmtha /1dnun :4)j.pkon series and 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 connected in ad);y mtm e1m1nm/+ betk*6b:myq/j nw combination 6m e1 bn;+/mmmjbw: kn tq1 /d*y)teymseries and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Whgac pkz3kk *+2ich bulb will be theac+kgz 3 *kk2p brightest?

  02.21: An ideal battery, an ideal am0vb4yk23dwc f meter, a switch and three resistors are connected as shown. With the switch open as shown i4vbfd3 c0ywk 2n 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 are conn; ygfgw82;cdwected as shown. With the switch open as shown in the diagram the ammeter reads 82;ww;g ydcfg2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battw4b(1y)rt qb kpp 48blery, an ideal ammeter, a switch and three resistors are connected as shownytlqpw 1(4b bp4kbr8 ). 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?