16.09: In the circuit shown, anjwr12d, e+wc0w :3bb,qc;k7bb ci zrg 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 through the ini2,7rrw ge:z1bq ccbbc, j;+0bkdww3terior of the resistor?

  98.06: When any four resistors are co36rhtz9l p8 + (xwrmplnnected in parallel, the_________each resistowtrp9lpx3lhz(6rm + 8r is the same.

  06.33: A current through the thin filament wire of a lightbulb causes the fila; 3sjzpzme u* ,qg/3wmment to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens becauqz3w 3mpm/ge* su,zj; se

  13.08: Some standard household lights are being replaced with LE88jl. tup wyjfp, tt01Ds. LED is the acronym for yj8fl tutw1pp,j .0 8twhich one of the following choices?

  05.16: A cylindrical graphite resistor has length L and crosv9n5n1xw qkymd*ld1- s-sectional area A. It is to be placed into a circuit,ky*5m1v nxdl- wd9 q1n 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 of the same material. Wire II havyv4.3ume /c /,hu ylsbqc5g 1s twice the diameter and twice the lengt.u 3lc45s v/by mg/hyqcue,1 vh of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same materia3aab x5fg/14(iai-4 pfgrpm a l but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would hpm a-ai/3f5a4 p4x(abg1fi grave a resistance of

  03.23: A cylindrical resistor has length L and radius w *plo3d0xrd a38sf y(*tpq2yu0)lsrr. 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 of tyltsus0l ow2r3 qpyd8*0 *pf(3a) xdr his process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decides to zh rged;g*m/oh-(c d* modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more li;d-d** c/mh(gz rhoeg ght at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The length a efd)trs 6d5(odj(an.nd radius of each resis5nf(t. j6esr dod)d(a 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 of rem;a bq2erey +0l f7 9he2kztp,sistance R, are connected to a battery in the following way: “Two resistors are connected in series. This combination of two resistors is connected ityr +z e;,mf2 q2 9hlaebpe70kn parallel to a third resistor. 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 accompany9oop bn7mjs5 /) s(+a bpdid,ming circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA dm /+(nja) i md5o,ssb7pp9bo. The voltmeter reading is most nearly:

  97.37: Consider the comp5ktn1 r3.xbtpound circuit shown to the right. The three bulbs 1, 2, and 3 - represen xt.p 5tb1nrk3ted 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 circ 759mr 5lpt 6(ylap neb,.kwdhw*ij :huit at the right. If the current in all three resistors is equal, which of the followinkm5lhr 5 w t,j b9p( ayp:*ni.l76wehdg statements must be true?

  99.37: The diagram at right represents a simple electric circuit compos s ypny30k4g/yed of 5 identical light bulbs and 2 flashlight cells. py g y/y3n0sk4Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the sc *+no(.(.gvvm1dkxdthmf :fimple circuit showntg om. :h1v* .(fvd(kmfdnx+ c where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a batttw09* :zp dlyeery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with each otz:p9d wt0 l*yeher to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identifie * 6rok4(j(ln8sex kc3yt4 kvod resistor in 5 seconds once the circuit k34r8kvc jonk*e4(l tx y(s 6owas closed?

  00.23: If all of the resisoh 6wrw8h9eso;pj kpl9h qe6: n9r811yup.vutors in the following simple circuit have the same resistance, whiu.hevlu1ph;qsk 669 8 rr pe8wnoh9:p9 w1 joych would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the s0r3h0ixun t. 6.0 Ω resistor is3s0n tu.0h rix 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a batte8y/t grre o9/-kj/d izry. Suppose R1 carries a current/gt kzjd /r8oi- /eyr9 of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resiston5guy ik) ;8*lb09t+znu zriwm .zkx7rs R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the currkinu8zng9 ur+ lw).* i xbk0mzt 57yz;ent in R3?

  99.13: A heating coil is rated 1+rz e/7n q*ir zz(k r/:,;tnqp dpfuv1200 watts and 120 volts. What is the maximum value of the current drr/uz (p7n iqrzf/p,tn+zk: *e;vq 1 under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb des5s*k6vihkzm h63noi4ok *+:j 0dvtkpigned to operate at 120 volts?khk o p6*h6s +nmkkvd40jt:i 3zi5v*o

  03.09: How much current flows through a 4 ohm au62iy.9,4vak:o 7kbbxf h edresistor that is dissipating 36 watts ofk :u.oyhb 7xbdafikav9 624, e power?

  05.21: A household iron used to,mt07)xuha) qxg3 isjk5rpd - press clothes is marked "120 volt, 600 watt.” In norq)-hdig k0 ,7)t su xx35rmpajmal use, the current in it is

  01.05: Which of the following ry1r h y*der p;4e),7gi-(iiskcg3qqgesistances could NOT be produced by a circuit containing only three idy4 ehe7sigi* kirgg;qd, c(y r-3pq1) entical 6Ω resistors?

  94.37: You are given three 1w/ fx,)y/c:j xonxpa).0 Ω resistors. Which of the following equivalent resistances CANNOT be produced using all three res//)jf a)wcnx x oypx:,istors?

  02.06: Three resistors of different values can be connected together in ol pek2pea2 b3)fv,; sdifferent clko;,p2fp eb2 sv3e)a onfigurations. 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 ba+ vd9bvki*x+ii w3s0+d 39ei diaarv;ttery, 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 samevw+vb9 i ediiix;vk0d3ar i+3+as d9* battery? Assume the internal resistance of the battery is zero.

  96.16: When two resie b7cbs5a )8ffstors, having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statembebsfca f75)8 ents about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when op8* -nn0 v9 rzi*ih(m1biv qgzf6ta6 auerating at 120 volts. What is the minimum amount of tigiai mnb* n0r 1* v9zhuz668( faitq-vme 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 od.z-2s t h2hi2mt rpb-(99y7 fpoqeou : m5skhhm resistor that is dissipating 36 watts of powertd.ps- 2h752 - k:9yh9ez2oub mprshmf(i qot?

  01.24: An electric heater draws 13 *9dz3ueu bvk zf+4o 8hamperes of current when connected to 120 volts. If the price of electricity idh3ov9fz 8ub+uez* 4ks $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately howzw0r g8v :dseo25.,s.e fed35moqdzi much would it cost to keep a 100W lightbulb lit continuously for 1 year ez5i.f5 8e mgs,.0d2zw osdrq: ed3ovat a rate of $0.10/(kW.hr) ?

  12.09: A constant current ofkjc*v s7omx08djj4 ;a 4.00 A through a lightbulb results in a power of 24.0 W assv;o *jcs jx84kj 7mda0ociated with 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 5ut+5hyucr3y jr +toh5 +f73aj00 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the max yjuhcry + utjf3rt35oh5a 7++imum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistor 1k7; r2jtfncys to form a simple circuit as shown to thef 2krcnyt17j; 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 connected to four resistors to form a simpleg6xtcxb99cgc 26wr(. c-i id n circuit as showntii2 rx gcc9 cnbx-.6(d9g6cw 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 a 3r*g 0,sbhfhn y,ww4ummeter, a switch and three resistors are connected as shown. With the switch open as shown in th0rwhu , b gshnw,f*y43e 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 o7kov5(7ypo vmt*, uv three resistors are connected as shown. With the switch open as shown5o(toumvv7, pvo 7k* y 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 i--f8:( egiqeoyfli e :deal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 a8: qioi-( gfe fyel:e-mperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circuit shownkmuo) pml)t;zp..3/z(g.cdllxv b q5 to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resitu5b. zlzl3/qm.c;vg l pkp m)xdo.()stors have identical resistance R.

  09.07: The equivalent rq1 .ni+ nqk3sresistance of the circuit shown to the right with resisqq n.rsk1 in+3tances $R_1=4.00\Omega$ , $R_2=3.00\Omega$ and $R_3=2.00\Omega$ is

  04.20: The diagram below shows five ;u q0bx lbhv8 oi+i-xfe3f):w identical resistors connected in a combination series and parall bb3q)ivu8fi-fh+l;x :w o0xeel 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 a +5 *yp0te4ao: ojtjtux s.lu, combination series and parallelj0t5p u u +t,tys.lej:* 4xoao 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.9tt(mhx 24pze)up* ow Which bulb will bw pp4mzx u*2o9t)te(h e the brightest?

  02.21: An ideal battery, an ideal2 :t p(mqr h*rech+1sg ammeter, a switch and three resistors are connected as shown. With 2sc+:*thqrep 1(r hgmthe 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 ammetb;q;- u:tol g.htp ;kwer, a switch and three resistors are connected as shown. With the switch open as shown in the ;p:tow.lh- q u tk;bg;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 conme a/67ol,re+hq * ltnnected as shown. With the *6,rom /eql+n thal7e 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?