16.09: In the circuit shown, an electric current exist2/od6i( j2q)p0uxg9 ncdctl as in the metal resistor connected to the battery. Which one of the fa0jc tdn2o/u cqp6(2 x g)i9ldollowing 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 resistors are connected in parallel, t k6a8o t.74 plx8fbtsjhe_________each resistor i. 48sojlk 8apfx67ttb s the same.

  06.33: A current througgc1x .y6vb. onh the thin filament wire of a lightbulb causes the filament to become whx6bvy. og1n .cite hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lighta (aezxlz1h/ 5s are being replaced with LEDs. LED is the acronym for which one oe1h(x za/ zl5af the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-secti)sf veq7s;;y7vdoh + nonal 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 resistivie;dqoyv +)sv s7f 7hn;ty to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made oip 1(mugfej 2 nh56a0qf the same material. Wire II has twice the diameter and twice the length of I. If I has6q gae5 0mhf(n pi12uj resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter and ha -6kt5 5b/g;5gf e+ :sptxm4jt yqdohslf the length of wire X. If wire X has a resistance of R then wire Y wouldsqog5p h5mkj degt +xt64:t5s-f;by/ have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of 3st/9oxe8.bop 7ovkxo)mo77w-syud; x kg q) material is then drawn so that it is a cylinder with new lee)ybs 3o/p)kkd97m-xo. 8ovg sox qwx7 o 7u;tngth 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas E0/q.)v+oc *dhcr(k* ogdj zqi.l iww;dison wants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be mj;/kq gcvz).rw di.co+l i(*wqh0o d* odified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The length a /gxu bky rc1tx)hg/*2nd radius of each resug /k1/)yc t*h bgr2xxistor 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 b* 7u c-jgcwd6vattery in the following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a third*ucc -wgv76jd 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 j v)pvny;y);.e0 kt39baocbathe accompanying circuit diagram has internal resistance 10.0 kW a bka;v3ce );9 . anbtv0o)jypynd 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 the right.a;e5ig:qkcf - uxbf.) The three bulbs 1, 2, and 3 - represented as resistors in the dia;kifgx5c-qfa):.u e bgram
- 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 curren 7t+tz1ceo.a6pvkiot,k 13gbt in all three resistors is equal, which of the following st3ik aeogptt1 v. ob6c7,+ kt1zatements must be true?

  99.37: The diagram at right represents a simple electric cirh*h:p*nl qm)qol0m6rcuit composed of 5 ident* nh0)*rp lolmqmh :q6ical light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements 8vc..u6cgnxx0 m)o7q/lev.d c rg z i5is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resist z5rxgd.g8muoc7i.nx 0 l evv.)/6cqc ances?

  17.29: Two lightbulbs X andY are connected in se9yol vjdqt5/t-0 m q+cries to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are conntcdov0q/jy95 +qt-l m ected in parallel with each other to the same battery, which one of the following choices best represents what is observed?

  06.34: How many cozmmkre o) c;jc .:a)7mulombs will pass through the identified resistor in 5 sececamk).;z7rmmj:) o c onds once the circuit was closed?

  00.23: If all of the resistors in the followgnepif :d/ ;+king simple circuit have the same resistance, fdnk+geip:; /which would dissipate the greatest power?

  98.34: In the accompany o6 e..qbmp2ogb ;o6lning circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What bo pqb loemgon..26;6is the power supply voltage V?

  97.27: Three resistors R1, R2,k hy.hfzl7v- 7 and R3 are connected in series to a battery. Suppose R1 car. kz f7h-7vylhries 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 parallel tt pqn )s4 v-xpb9z(s0 ay*l3jf ti;gs4o a battery. Suppose R1 )pb9j (ygfqtzi4 *0ls 3astspvn-4; x 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 120 volts. What is the mrag bmj)m10* l,j)u hiaximum value of the current under these conditionsb ,mrg1jl iujm)h)0 a*?

  99.23: What is the resistance of a z0v5w-givynn9b:l6htk) k f g*ls3 p*60 watt lightbulb designed to operate at 120 voltb:yk-*n*9 g5vv0gp n wh3is flkz)6 lts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 waeqzhy. 8g h-s+5sx- gzu(v8zl;sr/rj tts of p8g h-zqs sre-85ujrylz ;z .hgx+s(v/ower?

  05.21: A household iron used tzq +6cs*6 ozcxi3lf25ww xc*lo press clothes is marked "120 volt, 600 watt.” In normal use, the current in it ilccz*w66c25 qxfsio+*wzl 3xs

  01.05: Which of the following r 88tfypjf f( duu5q0h6esistances could NOT be produced by a circuit containing only three identj td50fhq8(f6 py8 fuuical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistoi m/p- .ag(*d uif0iuirs. Which of the following equivalent resistances CANNOT be produced using all thre0aip.imui/ud - *if( ge resistors?

  02.06: Three resistors of different values can be connected,. pqvjva8q+q together in different configurations. If all three resistors are used in a circuit, how many different values of total resist p q8,vqjv+qa.ance can be produced?

  97.35: When a single resistor is connected to a batte+i:+ e+fx/cs kaaci)ro683 xgxk b0lery, 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 f) cre l+a+c+6a3igb0o: ks xki 8exx/resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2,pocz 1 7bg1jjds am01( are connected in parallel, the equivalent res 1bjm ao0g dz1pcjs7(1istance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it hai3wkt jn8 vji/.wm)lf*vqqd*omq -)7 s a resistance of 12Ω when operating at 120 volts. What is the mini)vftmi) vnj8wd*-w m*i qj3ql/7.o kqmum 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 0eo adb euht 5.q4 j+6yu5yum/ h.kcb(a 4 ohm resistor that is dissipating 36 watts of po0jub.4y.5atkeu u 6(o5hm+cyb ehqd /wer?

  01.24: An electric heater draws 13 amperes of current when connected to 120 hrmb ;ei )4xfih;n7 ia+o ,i)ovolts. If the price of e io 4)i ;i,onxa)fhi+hm7bre;lectricity 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 kee*)p 2tlx/zgoe0 2 pkmkufovq:1xy d34p a 100W lightbulb lit continuously foe2o*z2l qtk f3gxop:0/y1p4)mxkdv ur 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4. usxe/n8h-c5 f00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resist eux5fch/sn8 -ance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated ati6r yqe1- npm q71sa8 eyzqmb 9,/;tht 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected b9y qei qzpm h,;6 t-tarny/se171mb 8qy a 20 ampere fuse, what is the maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is con(g k:k:.arn3bi sd-a lnected to four resistors to form a simple circuit as shown to the righkangbl(: a:dri.s-k 3 t.
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 h)q,-4b xk kmuform a simple circuit as shown t qxm u-k4bh,k)o the right.
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal batter +m p7,ugak,;znqax y3y, an ideal ammeter, a switch and three resistors are connecte,qa ,7nm3zgx;kp ay+ud 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 battery, an ideal ammeter, a switch and three resisvhw3700a6z01 vv gxya6v cvwe y(2 mgitors are connected as shown. With the switch open as shown in the diagram the ammeter reavv0g cw1amvygi2v(e6z0y 3avw x0h6 7ds 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 arb xeiz1 ql50jwao-2 h g.a:w8de connected as shown. With the switch open as 0qgjo5awebw1ha:li 8x2dz. - 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 right, what is the equivalent resistance bhw8*4 -wduvc? Assume th wdc*48-uhw vbat all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistancelv8 q 5y+.:z hqysuke1 of the circuit shown to the right with resistanceu.qe s5hq8k z:vyl1y+s $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in8o 0jqm;n;i+n a ,jfqq a combination series and parallel coqna +q;jmq;0nif8j ,ircuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistoh)*20om4 6okm-ukq0ey m vc*t1ozntvrs connected in a combinati*4zm6m2) q 1mtou*-eho 0ky0vnkctvo on series and 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 bulbsue2g1a1su x 5.wje gp; are identical. Which bulb will bu1jxau wg 2eg1.5e s;pe the brightest?

  02.21: An ideal battery, an ideal kq5:ro- y6t5bywi (neammeter, a switch and three resistors are connected as shown. With the s5 w (6-to ekyi:bnq5rywitch 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 ammeter, a switch and three resistors a sur wxu1u6 j )bk10wc7nplmm/h 67ga,re connected as shown. With the switch open as shown in the diagram the ammeterns7hm7c6 au u gp1x)muw,b0k/ 1wjl6r reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an i6c*a3/idebswdjuxi+ h 7m+ z3deal ammeter, a switch and three resistors are connected as shown. With thejc +sd ew+hxi6b7da 3 z*3um/i 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?