16.09: In the circuit shown, an prf d7k0a-0vp adml hi w0 ;uj/x:4sd.electric current 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 and the direction of the electric field thro .al-0f 0mhx7sjpwi4v;apk 0 dr:d /duugh the interior of the resistor?

  98.06: When any four resistors are connected in parallel8,ipwlew;t 5s1n e3 zc, the_________each resistor is3w ,n5siwe;lec tzp18 the same.

  06.33: A current through the thin filament wire of a lxe:75jjyll3efen)vs .0 4uits /s4 vuightbulb causes the filament to become white hot, while the larger wires connected to the sjt:.l5xvy u)j e7 ie4 0usf/nlse3 v4lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with vpe ) 8m-mrii0LEDs. LED is the acronym for which one of the folm-pivremi0 )8lowing choices?

  05.16: A cylindrical graphs 4bmpeah x;m:8f86 uxite resistor has length L and cross-sectional area A. It is to be placed into a circuit, but it first must be 8a4sh m b8x;m:uep6f xcut 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 m5uaz b cm1tz332fyo6nd5zn: f ade of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has resist3z1:mnb53znt5 uda fzyfc2o 6ance

  99.31: Wire Y is made of the same material but has twice the diamg-wz0:j7+g.xlyipv 3kp2/ocnq prl.eter and half the length of wire X. If wire X has a resistance of R then wire Y wyrvl 3 glk.zpj n:cpi2. 7pw0q-/+o xgould have a resistance of

  03.23: A cylindrical resistor has length L and radius r. To iiw2 2teqj di 51d-oj768al;r,zhr ehis piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the restdw ,q8; i1iel2dj2 7-56eo izrrahojistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decidc9u b8;+yvo/yu df vj37rt8zb es to modify tyjuuor8b8db 3/fyc+ 9;tz7vv he filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors:+d m3vfkqy (qby.ecqj v1( x- are made of the same material. The length and radius of each resisvdc(3q1qfvjym :be+qx.yk -( tor 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 obgpen0 o) i42rf resistance 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 isnr)p g 0e4o2bi the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram has internal resk4m* jy.7 ibl2c ,pmqszy5g 0ristance 10.0.grc40slbj7 m k5pyziqy,2 m * kW and 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 compoundz.y d pt yez;918xmau8 circuit shown to the right. The three bulbs 1, 2, and 3 - represented as resistors in the diagram 81mydzx;p8 . yzte9au
- 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 simp)-epg+lw r- eqle electrical circuit at the right. If the current in all three resistors is equal, which of the following statements must be -we-+pglq)r e true?

  99.37: The diagram at right represents uyuu( 80at0cfobsa3* l( dhj8a simple electric circuit composed of 5 identical light bulbs and 2 flash3 yuub( sla0o0 *d jat8cf(hu8light cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statmjbb0)zz2/vy (d; 8eh-u but z 6:ljmtements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resistancedb jjy2u)lt;ue t(hm 6 -bzvm/08 z:zbs?

  17.29: Two lightbulbs X andY are connected in series to a u :vz)-xi 3dizbattery. Bulb 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 bu)-zx:vi d3i zest represents what is observed?

  06.34: How many coueim73xst f(d 9o.dn.k lombs will pass through the identified resistor in 5 seconds once the circuit was close.9s nefmt ( o3x7kdd.id?

  00.23: If all of the resistors in the following simple circuit have the xnn 0q8qdzj 01*faey56c lyk;igrq :2 same resistance, 0a1gqx *ey68iqkn: z cdyq2 0flrjn;5which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through tw9 sl5gt0y4b6 s4 ;/y anqx dgke-l9dow+feu5he 6.0 Ω resistor is 1.0 A. Whatg9 wnl6oxg54tbdws k y;uqs /9y4 eef0+adl 5- is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in serie2of2a a0 f(qm-yfxr, bs to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipatesr -am,qaof fx 2ybf0(2 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors xp5,iy5y9 i1(q d:ezr b ug,gcR1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dis9q1y g:r,cyu 5pgxi5i b( d,zesipates 6 W. What is the current in R3?

  99.13: A heating coil o).p+5 3uzdps1g lavzis rated 1200 watts and 120 volts. What is the maximum value of the current3gdls)5 p oavzpz.+u1 under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate at 12fk);rl ax*o4m0 voltrxl 4* fk;oam)s?

  03.09: How much current 6umof1q+ 1/yn7q j *k7nh1wd 7vrfkny flows through a 4 ohm resistor that is dissipating 36 watts of pow1f6h7*1jqd mkqnry n7f1kn7 +yw vo /uer?

  05.21: A household iron used to press clothes is marked "120 t3s ebi(w*;d4 gmlk(pvolt, 600 watt.” In normal use, m3pi*(;kdse lwb (t4gthe current in it is

  01.05: Which of the following resistanca9v d2/a iesvmwa/hn1u8*nm5 es could NOT be produced by a circuit containing only three identical 6Ω resi/we*n89m1u h a2smvavd/5a n istors?

  94.37: You are given three 1.0 Ω resistors. Which of the following rhd- e;ryb .h( ye wc*ia-kok8 38ko zmxr*)y0equivalent resistances CANNOy(; cbhrkky hme)8 xe.*dy80-ka-orowz*ri3T be produced using all three resistors?

  02.06: Three resistors of different values can be(,n3gj 7i1 0a6jotw qbtmwo. p connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance cai7n p6.tw0j qobo(1jt3 gw,ma n be produced?

  97.35: When a single re,i; zp6mdb+o xsistor is connected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identz+ido 6;bpm,x ical resistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are m*w ebr6/ cd4n*uty6* bdln 0mconnected in parallel, the equivalent resistance of the combination *yd /m60 n*ewcm4 td r*bn6lbuis 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that itur64d b ubxl48 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 o6rbd u ux84b4lf water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 waqj:f8xm 3ezy (l8vf 9n3xfq9 8e: lnmzyvj( f8tts of power?

  01.24: An electric heater draws 13 amperes of curr 7ezmv5b.ka3sent when connected to 120 volts. If the price of 3k7a.zebs 5 mvelectricity 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 contio k6(grl+) pswk95o5xyy log2nuously for 1 year at aogy)gy( l2 powr5lxoskk+569 rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results)p3 vr 0yx*zsx in a power of 24.0 W associated with the bulb. Which one of the following choices best r)*0 s3zxp ryvxepresents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 watts d,b d0( g km+qv*h0(qozyz4 grin a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, wha(*g00gqdyh +rkz mb4(v qdo, zt 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 simplezo+-h57 z5tmslqv nk6 circuit as shown to the rs l6om-hn +t57 vzq5zkight.
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 resistorwjp*zhyy3- 874lh jvrs to form a simple circuit as shown to*-lyhhr48j3zp7v jw y 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 resit9*s e+ lknttb4 2rnz)stors are connected as shown. With the switch open as shown in the diagr9 *bt+ k4z2 n)slttrenam 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, rxl40jr lf;2mx h48gha switch and three resistors are connected as shown. With the switch open as shown in the diagram the r 0h4xmj rgflxh 28l;4ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, aaxnue6tb ;t0 9n 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 ampu te9nx06ba t;eres.
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 resiow2cuwr- e.a jf5zv-u,+pi l)37nceqstance? Assume tuvc.j-wq5,-2unirw o )3fzlcp+a 7 eehat all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent rlq hih4w*ij26tv 3 cthy*a94 vesistance of the circuit shown to the right with resi9hi j26yhiqavc*3twvt l*h44stances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram beloct3+ nkv2dn g/w shows five identical resistors connected in a combination series and parallel circuit to a voltage sourvn2/3 k+gc ntdce.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resib qp+) xom0g7hstors connected in a combination series an+o)gqmpbx7h 0 d 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. Which bulj4 o;+g /s bvov2w0 phproe4c7b will be the brightpo 2h70ew/po4co 4;gvb+sr vjest?

  02.21: An ideal battery, a .e/;kov t:+dmm)dqir f00fcan ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram thvmiad0d;)+mk /t:rf ec0o.qfe 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 a0)z yg p,hm(kx)z:p(utb7gq g re connected as shown. With the switch open ahxyz(0ggp, b):m 7k( p)tqugzs 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, ank /u ve7y2)abn ideal ammeter, a switch and three resistors are connected as shown. Wnu2vk7)e /yb aith 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?