16.09: In the circuit shown, an electric current exists in the metal resistor 4x f.4a gu0bxb41xg ijconnected to the battery. Which one of the following choices best describes the direction of electron flow through the ab 4g4.1 4uxixf0xjgbresistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in p m1rskeqg2-kx qpd ,+b5)thr9arallel, the_________each resistor+ 9mrts)d5ekh2xpkg-b qq1, r is the same.

  06.33: A current through the thin filament wire of mt0ci0dqd32q/s g l( na lightbulb causes the filament to become white hot, while the larger wiretq/q3l(2n g0dds0m ic s connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights arvjy 9i8q3oza 7e being replaced with LEDs. LED is the acronym for which one of the folo 7vz89yjiqa 3lowing choices?

  05.16: A cylindrical graphite resistor has length ht ;lzal*08(s9wuer8 1vqwnl L and cross-sectional 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 resistiva8zsl* 9u t0nwlr l1ehq8( v;wity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the saw 0 tj-bjs 1/d4bqemp(me material. Wire II has twice the diameter and twice the len 1j 0dj4stb-/(wmpbeq gth of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter and half6g(qb:uw-g g z the length of wire X. If wire X has a resistag(bq6g:u- gwz nce of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This pm)b1tgjrif(m 0mu* v-iece of material is then drawn so that it is a cylinder wim1vui mjr)* m0 g(bt-fth 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 yvh.ep/v009por 6g2c4gd i0(hgm s oebrighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make thr. 0m h/hd e9 v6c0 4ps(iyge0povgg2oe lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resir9e+b6cj s1 yhstors are made of the same material. The length and radius of each 96+hrsjebc y1 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 zc*g;k.dz ag o8zx)9c the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a third resistor*xdz98;zck ao.g ) gzc. 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 alekk*r(la1 hjx b/t;;2 w rl.rb:;fl occompanying circuit diagram has internal resistance 10.0 kW antoe2wj( ;;.:hl ra*r;rx/flkbl 1lk bd 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 compound circuit shown to kxhy l -q 7w mdcvwj4 w8x-bq-,--0eahthe right. The three bulbs 1, 2, and 3 - represented as resisto ,hw- y m-hvxjx-4ad-ke-cwq7b0 lwq8 rs 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 current in all 5cw,sp-qyw8g three resistors is equal, which of the following statement-5 y,pwqg8c sws must be true?

  99.37: The diagram at right represents a simple electric circuit compwmxg uas6 tsa86h7 es- hqm+b/1 y9dt6osed of 5 identical light bu-thy9hw1tmae6s6a6dgu sm + /xsb8q7 lbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statemecbr dkfbq( /35* k2 hpnf2dl9dnts is NOT true concerning the simple circuit shown where resistorsk29qd fk r(*f52 /d n3dbbclph R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series toa.s 2u+a+:x,* ccn3se zap qun fk,.dg a battery. Bulb X is brighter than bulb Y. Assume all circsc+fasqd *3pg2cz. :u u+n, .aa x,eknuit 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 coulomn +pgqt-zg xpg,,n +squ3ox;7bs will pass through the identified resistor in 5 seconds once the circuit was c7q osugp+,txqzg-;,nxp 3+n glosed?

  00.23: If all of the resistors in the followie /o;rg4q s4rrcjv ;3vng simple circuit have the same resistance, which would dissipar4r;j ve/ogcs4;vrq 3 te the greatest power?

  98.34: In the accompanying circuit diagram, the current throughqt8d d1 (xjq,ggb* b)y the 6.0 Ω resistor is 1.0 A. What is dbbqd,(tx)yq gg8j*1the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. Sups,d-up7vbe29n:hsh0 rbulm hz): f .npose R1 carri:shvb lhs dne,u-u .)m9 7rp zn0f:2bhes 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 resistors R1, R2 andR3 are connected in paraj ogi0pn3*9 2qqyr lk+b6kcf9llel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 d f0 qokqc pr96lkj9n+*igy3b2issipates 6 W. What is the current in R3?

  99.13: A heating coil is rated90k4rhz fq ./r/ire 4mv.i7*/gqta3ccp mbro 1200 watts and 120 volts. What is the maximum value of the current3r/ mrrig tob.c /qr4c7phi .9fmz*qvk /a0e4 under these conditions?

  99.23: What is the resistance of a gts h6pppxqj7*(i :ihp/0 3ko60 watt lightbulb designed to operate at 120 volts3p ih6poqppg/ ts7h:kix *j (0?

  03.09: How much current flows through a 4 ohm resistor that is disrpmt jdca7o ;o-o4 +8jsipating 36 watts of power? mtor8 cp+4o-oajd7; j

  05.21: A household iron used to press clotq;u5fgmyu 6 /thes is marked "120 volt, 600 watt.” In nqu fy5utm ;/6gormal use, the current in it is

  01.05: Which of the following resistances could NOT be produ la40+auyczm:ced by a circuit containing o4 c+u mz:ala0ynly three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalent gqa1bj4.rpugv . p6oi3:t u-presistances CANNOT be produced uoq3vugajt46 1p.ugbip:-r p.sing all three resistors?

  02.06: Three resistors of different values can *og 6fpqyxs vefep l.3t3n7h5; lxl68 be connected together in different configurations. If all three resistors are used in a ci sxhelleg*f3ynl ft v.365pqo; 7 86xprcuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connectw qmkrrb)5. tlec*t: y 95j45pquupd9ed 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? Assume the internal resistance of the batuplp jdbym54c 9q55:r.qtrw ) ekut9*tery is zero.

  96.16: When two resistors, havingmwea s/ )x;qc/d5k/s x resistance R1 and R2, are connected in parallel, the equivalent resistance)sqax ms kcx/5;wd// e 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 k ( jvx0six,:fle*w9rx ,*ib ha resistance of 12Ω when operating at 120 vo s* ,:xfv(webjl*ix0xk9h,irlts. What is the minimum amount 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 wa h ryz k(k+cb39in8 k2qtcilpe9+co .+tts o+kl 8t 29cikrk+z .p 9 (qc3onibc+ehyf power?

  01.24: An electric heater draws 13 amperes of current when connected to 120 voltv;7qac1m :nxz1c ;xm vz:an7qs. 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 ligacnb .) m /g f,t)fxggd//df2yhtbulb lit continuously for 1 year.f) g/)tdg// fmcg, xdnyb2fa at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb re fldm94+ojn l:sults in a power of 24.0 W associated with the bulb. Wm ofnl+j 9l4:dhich one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six oe1bk) v 0get*jwns a computer 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 1v0eke*g)tbj be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple cz*+j .kkpkcu bve74rvb8 w/8iircuit as shown to the rigevp 7c i8u*k8z bv/+ kwrb.4kjht.
How would the current through the 2 ohm resistor compare to the current through the 4 ohm resistor?

  03.17: A 9-volt battey2wi-8tz zep3+1dtvf ry is connected to four resistors to form a simple circuit as sho ew8d3-zttf+v ypz1 i2wn 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 -a,npu kdq/l3 13jo40wccy ,lph(wg hswitch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amper/cjyq -4u (,ahpkpl1d cw0,wo3n3 l ghes.
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 connamv0d no*m+ 5dected as shown. With the switch+vo0nmd dm*a 5 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 ideal ammeter, a switch and three resistmhwtn0g2 dh73gd.s2x oquf, 0ors are connected as shown. Wi.fsx0 u37hgdg o,2tnd2 mq 0hwth 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 rhj; p 8b5(8,: 1d,,hsks sjukjburuahight, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors haverdskj ,k 8a( 5ub1s j8hjbp,u hu:hs;, identical resistance R.

  09.07: The equivalent resistance ovtf ,yhcs/ k -,lzewbp ./25dkf the circuit shown to the right with resistanc,/.- 2kzw,h yvt5lckbfs d/pees $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors conne/:ml6 egue )v(l-ws8jq.)tgi,b3 b pltxff q7cted in a combination series and parallel circuit to a voltage soub eb/t)(g tfe is-fxg 7 8l: pwj,3qv.6lm)ulqrce.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five n ak mj,5a2qyy c+(.ojidentical resistors connected in a combination series and parallel circuit to a voltage (n y .,cak2a5o+mqjjy source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are id4lqyvn 1(+5zgqa6aa qentical. Which bulb will be the brightes agyq41na+zavl5 6qq (t?

  02.21: An ideal batterycenv . i)zym; .lgk3x2, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram t;g2k vl3m y.nix .)ezche 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 switch4wbd9yifsm) 10jx6o c frp;* /jk /kpj and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampersp/pfjb *jd;okw4jc6kmfy r)1i / 9x 0es.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, gy/v9, ft zf2 5opr(pman ideal ammeter, a switch and three resistors are connyp(grp ztfomv/ 2 f95,ected 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?