16.09: In the circuit shown, an electric current e3zq 6*ig7jk:sq 8, jsiog,p/4riq ikwz6mgd5xists in the metal resistor connected to the battery. Which one of the followin k p *3 wd7q/j q4gj6 r6ss:ig8iiig,zoq,5zmkg 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 resist f;*g.+tt bvwtors are connected in parallel, the_________each resistor is the samet;fwt.+ * gbvt.

  06.33: A current through the thin filam;u(yvdxzq k+. ent wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remvq+kz(xy u;d .ain much cooler. This happens because

  13.08: Some standard 7gn d0qyv: w7vhousehold lights are being replaced with LEDs. LED is the acronym fvw qg:dv0n77 yor which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-se)by+o: xi kbx;5 2vbspctional area 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 new resistivity to the old resistivitykb5is o+ ;bx)y2xvp :b of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same materialjk1e, k 7wsnx+. Wire II has twice the diameter and twice the length of I. sj7x,k1we k +n If I has resistance R, II has resistance

  99.31: Wire Y is made o 5sr9nbx(xd t:f the same material but has twice the diameter and half the length of wire X. If sx( n9:5brxdt wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of materia84707 )u/c-xsc: ev8h4 c hsgoch e4i camzgtel is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material becau4h0m7cct s: /ex 8 oz87hcgghsicvea)4c4u- ese of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decibtt:dws0yg0)bdj*o u 8n7 4whs -6b wqdes to modify the filamentd-6n0 h u7s4dgyt s0wqj)w * bowbtb8:. 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 are made of the same material. Tjruc* m5 h6-hphe length and radiuscrh6*u5j-hmp 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 bj3b3baxwy (;a battery in the following way: “Two resistors are connecba3y j; bbxw3(ted 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 equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in tc2nboaxg -s.sr7: ) rche accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmer7 s:cnxosr2-ca ).bg ter reading is most nearly:

  97.37: Consider the compound circuit shown to 7a9fl tg1:(lsj,y1qibj y3giyis 7 u4the right. The three bulbs 1, 2, and 3 - represented as resistors in the diagrillf4js7 t19 a:y71y,iq b3 (uyijggsam
- 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 ely1 m2zd a.t5lkectrical circuit at the right. If the current in all three resistors is equal, which of the following statemena.tz kmy51d l2ts must be true?

  99.37: The diagram at right represents az(sm 42 rg7t0tj.bpxr simple electric circuit composed of 5 identical lighsm xgz2t .j7pr4(t b0rt bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simpu j51zqv 3 pysacl)3,ile circuit shown where resi5s)3ya,cqvu 13j plizstors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected -sylypm(+vl.;bm u. ein series to a battery. Bulb X is brighter than e-y+. y(;ll svupmb.mbulb 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 observed?

  06.34: How many coulombs will pass through the identifie6k3or gz 5i*ffd resistor in 5 secof*g3fi 6zo rk5nds once the circuit was closed?

  00.23: If all of the resistors in the following simple circuit h2 db(5(sfiw c 6qiq0byave the same resistance, which would dissipate the grcwfqbi062sy 5 i( b(dqeatest power?

  98.34: In the accompanying circuit diagram, the current through the 6 rgx;vc r;*lv/.0 Ω resistor is 1.0 A. What is the power supply vg l; rv/;vrc*xoltage V?

  97.27: Three resistors R1, R2, and R3 are c4ohsg:t 0 ryzcg96bg+6w;dzl onnected in series to a battery. Suppose R1 carri clzgsbrgdzh yog9:;t+6w4 60es 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 across R3?

  99.40: Three different resistorz,vqm9:, i*ds- uiqwt s R1, R2 andR3 are connected in parallel to a battery. Suppose R1 *:mv9 zisuq,tdqw -,ihas 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 a:6r9kfg8l27bj pgugh nd 120 volts. What is the maximum value of the cur6kgjr8 bh upg7f:2l9g rent under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb de lknraj (+e+g *-bw4nasigned to operate at 120 kg(jna+b a-4rl enw *+volts?

  03.09: How much current flows through a 4 ohrnhhl +2l q7d.fsq j*1m resistor that is dissipating 36 watts of p+q.1l f j hsdn*l2rq7hower?

  05.21: A household iron used to(ejiqr.xbiw.k 35p;0q q dwa+ press clothes is marked "120 volt, 600 watt.” In normal use, the currenb0peiqq iqj+a( kdrxw w;.53.t in it is

  01.05: Which of the following resistances could 1may( 2. q z*c/8lcyv*nfmrna NOT be produced by a circuit containing only three ident* y* /8mc .alnan 2zy(cq1rvmfical 6Ω resistors?

  94.37: You are given threycpq0jvs,uwn37 tdn* b, -uj. ln-e57mtu8boe 1.0 Ω resistors. Which of the following equivalent resistances CANNOT be produced using all three resistors?uvd 5ue-b8tj 3j,p.m ql* onus7nn0-,ct7 wb y

  02.06: Three resistors of different values can be connected tognsc* .oqpf)q2wnsu a 26x 8si7ether in different configurations. If all three resistors are used in a circuit, how many differq2iuns8ocspw.x 6fqs n*72a )ent values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery, r1yu3fy; go9qt)h c k4a 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 batt trck4 q9g;)3yo 1fhyuery? Assume the internal resistance of the battery is zero.

  96.16: When two resistorq 5j8n4dz nqp.s, having resistance R1 and R2, are connected in parallel jp5zqqd8. 4nn, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when 4g3 w8pro z0dsoperating at 120 volts. What is the minimum amount orogw038spd4z f 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 fl cdx 950zba+lkows through a 4 ohm resistor that is dissipating 36 watts ofzl k5b +dcax90 power?

  01.24: An electric heater draws 13 amperes of current*:g6 wmqx-hz o when connected to 120 volts. If the price*mxg:hzq o -6w of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how muchd6tzr8 vtfv+ 6 would it cost to keep a 100W lightbulb lit continuously for 1 year tzt6 6+rvdv f8at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb res, k-qr:srng pph /0jz nsn3/7yults in a power of 24.0 W associated with the bulb. Which one of the followi n:3/sh0/g7r q,sypn-n z krpjng choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a comxk nz3geo+,/dputer rated at 500 watts in 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 computers can be operatingn /z3o+xked,g at the sametime?

  03.16: A 9-volt battery is colaq (m/l1imn7nnected to four resistors to form a simple circuit as shown to the r1mliln( /7m qaight.
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 conneco gl 9q-.-hm5lg3ga2da+zdzriol1/e ted to four resistors to form a simple circuit as s-ma+zdgir2dl e g q9h53oal- zo. 1lg/hown 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 annu +lm ib-4h9tjsm-*da/1 xebd three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2u imt 1hj-b-mbdxeal4+s 9 /*n.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 re 39gn-alb4s;uuu dkj3sistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperejgn 9usdu;bk 433 -ulas.
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 resis) 8+dnz5u2jzdt(f 6 o: vo3lwvkcihz7tors are connected as shown. With 2vi :3kzhovzd5 l t7()w6dc8 +onjuzfthe 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 circui+ (3efgk+ krb7xhvi.gt shown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.++ e3.vkk7 (xrbgih gf

  09.07: The equivalent resistance of the circuit shown to the 7 y :qzk0yn/2 zl6pndl,vly ;p right with resistances l:z 0zy p2y,nn7 6 qk/lvdy;lp$R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected i3rc82eh3j tjcb8 el7qcmqc* 6n a combinatio q2l7*3jcbtc3cjcmeqh8e 68 rn 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 identis;3y;fz l3px cl qs,k9cal resistors connected in a combination series and parallel circuit to a voltage sourcl;c 3;,szf9 kqpx s3yle.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the v0yb *k5lzf mny/ cum0.nlp*-eb b3z)s- vgk3bulbs are identical. Which bulb will be the brightest?nyzmkl0vpbb es- -u/c*k0nvm.* lbf)gz 53y 3

  02.21: An ideal battery, an ideal ammeq(ww ..tgs lb-/9k xq5q ot-zoter, a switch and three resistors are connected zwx-so-.qt5(q g k l t/qobw9.as 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 battec cyno/r;pep :09i7 2;o mipvkry, an ideal ammeter, a switch and three resistors are connected acki;p0e mnip coo;v9:yr7 / 2ps 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 batt idzixr-x/);qwefn.caw + 3x1 ery, an 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 amperesidx wi1nx/;e+ra x )fwqc3-z..
When the switch is closed, what would be the current in the circuit?