16.09: In the circuit shown, an electric current exists in ygl9yswd 2q(+the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow t gyl+s9w(2qyd hrough the resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four re59 dyomtfz*ee *6cy9tudx; 1psistors are connected in parallel, the_________each resiseytez5x* ;916p*mdcdftu o9ytor is the same.

  06.33: A current through the thin filament wire of a lightbulb causes ) )e*v-j obeegju5v9fthe filament to become white hot, whb-) vgv5efejju* eo)9 ile the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are beyp6q fi(;*fur5 8ug*p j sn-, d8lrfqeing replaced with LEDs. LED is the acroi6;se8fdu*up 5rfy -j ln *rqpqf(g,8nym for which one of the following choices?

  05.16: A cylindrical graphite resistor hatxw d (64v1zrys length L and cross-sectional area A. It is to be(t rwy4dvzx 61 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 resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the r: /u,tej0i . zdwwgt42fnz k9same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has resistanwdzgwjrk94 f :tin/u 2 tz0e,.ce

  99.31: Wire Y is made of the same h:y3gjo9u- stoecg0 +material but has twice the diameter and half the length octj 03g+yu g-os:o9hef wire X. If 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 piekv) qiwspo 3(y vm2a(9ce of material is then draw v9qy2(kai3om )spw (vn 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. He yu ym/cg+xf.-l95; bzb;p- mhrhp sh0decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light p+h / pfcy5x.slr9buh0bhm -g-m;z;yat a given voltage?

  16.07: Three cylindrical ru dbd;0)sd2it5rtol 0y u(aq+esistors are made of the same material. The length and radius of each r(d;)uuy0ati r5so +t02q ldbdesistor 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 battet rxcsx*,js tw;)kzj/jau46 ,ry 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.” jszr;js/ jxwca*6xtu ,,k4)t What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompani; /80k6 u g p+ht0n4ifbpjnpzying circuit diagram has internal resistance 10.0 kW and the amm4 nnbp0hf+ i68;kgtjuzppi/ 0eter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound cirbs cc9 9yg(yb5z,lrk tnq(w17cuit shown to the right. The three bulbs 1, 2, and 3 - represented as reyb wrck(, g1t99y z5n(lbs7q csistors 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 circuit4.xasp ;qgu 9zsd*0gqj , odwx7.5kz z at the right. If the current in all three resistors is equal, which of the following statements must be trjdg .o,z4xu9zpdqkxq;sz5sa *7w0 .gue?

  99.37: The diagram at right represents a simple electric co-+aebvt 0 hs-f4jd7rp;paed(k ; 7ip ircuit composed of 5 identical light bulbs and 2 a ; b -;-+df 4va(t77pejprd0eikso phflashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT3wzp jng;*s 9 ,c ebx5syni;aq*fao7* true concerning the simple circuit shown where reoix9 3*a fz*nc;s* ,wjbga5;n s7p eqysistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X i9on;,k9,qefnvqw(at/ xv:15nk gpj folm .u0s 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,mv:9loe0o9qwj., xkn ft u ,( pnv/qnf1;agk5 which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identif-zmq5niz t2 v7ied resistor in 5 seconds once the circv5 -z qimn2zt7uit was closed?

  00.23: If all of the res p2h4n* ph/gml4fpf :pistors in the following simple circuit have the same resistance, which would dim4pl/fp:p2 nfghp4h*ssipate the greatest power?

  98.34: In the accompanying circuit 26 r:myp+m skwj )pgu6diagram, the current through the 6.0 Ω resistor is 1.0 A. What is my2kg 66+w:u) p jspmrthe power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are codw *rf 63x8tmuc,e m( o3o;plks 2ggt4nnected in series to a battery. Suppose R1 carries tmfpw(;g32* 4srle ktou c 6 dgx8m3,oa 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* 5-ml mdk4 krnbx08e8-zjhsc parallel to a battery. Suppbdx--h k*40me88lmr5 nkcszj ose R1 has 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 and ;q ++y;kfzqtj ,5bag u)q*toh 120 volts. What is the maximum value of thyaqg)u+tt 5h ;okq ;j,+ *qbfze current under these conditions?

  99.23: What is the resrj*zk v4e7+pj istance of a 60 watt lightbulb designed to operate at 120 volts7 ze4*vrp+j jk?

  03.09: How much current flog 0: xaoh51fqng 1uut4j1m0my ws through a 4 ohm resistor that is dissipating 36 watts1ggm u tm:0 unq0 4afxh11jo5y of power?

  05.21: A household iron used to press clothes is markeu *f5ga p;b;yzd "120 volt, 600 watt.” In normal use, the current in ga zbp;;5u*yf it is

  01.05: Which of the ffjq( bdur1( a2ollowing resistances could NOT be produced by a circuit con 1duaqj2frb((taining only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the follot7yep 9 4 /o+cahmlpe 7w5ft9ywing equivalent resistl99tw5ao/ftehm7y7 py 4epc +ances CANNOT be produced using all three resistors?

  02.06: Three resistors of diff3wi agkk3jnai+;l0; p*iilr 5erent values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be pg k0ilw* nip5l;;+3irai ak3j roduced?

  97.35: When a single resistor is connected to a battery, a total power P i mph)k ekl*dj7e (ra-0s;k7xt s dissipated in the circuit. How much total po7 )kt*-;r0xelmehjdskk (7apwer is dissipated in a circuit if n identical 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 connected or,s bpow,,v9 in parallel, ther sobo,,9w v,p equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is d7hpaa u6 2 fbvgefzu i+mr*4u* )( ubn3n4.dbfesigned such that it has a resistance of 12Ω when operating at 120 volunh i4pv7u f*3fu a4b*gb2r+dnmza. u )be f6(ts. 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 currenf4li- qk79u usls3 + vl8ff4lit flows through a 4 ohm resistor that is dissipating 36 watsf8 7vqiklll 3+uf9flu-i 4s4ts of power?

  01.24: An electric heatf:/s8k stmsup/neiz5a+ :e 9 ser draws 13 amperes of current when connected to 120 volts. If the price of electrs +ts:u/pe k/sf:s5az89nei micity 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 ci+1,y3;jkgj y ;uh ycv0gjt+d9sa3e tontinuo+;y 3uge3,t j vcdkaiy;jy0 t+sh1gj9usly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in a pow jx 8sim/5j)eq: :xeqyer of 24.0 W associated with the bulb. Which one of the following choices best represent:8jqxm 5 j sqe:ix)ey/s the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computerh4d92u(,l2b;hvilplz 0ti pk rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 amperdpu 9k42 l hhlv0zi;lpt2 ,(bie 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 forxsb7-q u )reavo h.xr349q:bsm a simple circuit :vasuqb47 se .qhr)3b9 -xxo ras shown to the 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 f o4ik ssltu54o 0d;c5vorm a simple circuit asss oktvl5544cdi u 0;o shown 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 and three resistors are conjww9egr/ 5 /fa3f7u; btkg(xynected as shown. With the switch o7gxw uj; 5 re/f k3ytabf(g/9wpen 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 rey6 j4cd* brl:h +:e dzwqm1q/zx3vy5ysistors are connected as shown. With the switch opeyrjm5ey :y +dwqq*/ 3h6z lb1:vc4dxzn 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 resistorsrzvpjk**9f2l poo/ .x4 pgihtq0b+k * are connected as shown. With the switcpf2rv4qxlo ht0*bj+g pzopk k9i./**h 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 rigk mjj*:kha) 2yht, what is the equivalent resistance? Assume that all wires are ideal, the battery has no jj)hk:y m *a2kinternal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown txoptsr 1,rt)8 o the right with resir,)t8t px s1orstances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identih2 th g0r7ac) s q0g;z.iu1tnxcal resistors connected in a combination se)r 2 0t.7 0zhs1qggxn;hui actries and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram belowg7.ek:aw e6zjye qk/ 9 shows five identical resistors connected in a combination series and parallel circu keq a:jw/.6y9ke7eg zit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the -o snq/hd(w*ungldi ;k4r6:a bulbs are identical. Which bulg 4nh6/kw:ld ;qdar n*s (uoi-b will be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three reslm1j ) q*;go.uy/on msistors are connected as shown. Wmy 1osu j/n m.*l;gqo)ith 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 o*owxcuq(r ( ,q8tv:r8xaw z+ammeter, a switch and three resistors are connected as shown. With the switch open as shown in,(w8oocz: (+q8r t qwxrx* uva 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 amki 3ayn n7g+ci*9tzvu6 g,9ukmeter, a switch and three resistors are connected as shown. With z6g a3nv*tc, k k9gnu9y+ii7u 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?