16.09: In the circuit shown, an electric current exists in the metal resx mx o tk;7*wkhv-r3c2istor connected to the battery. Which onew;h7vkk3tr-2x *m cxo of the following 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, the_______ fer.c al)j5u;__each resistor u elfja;.r)c5is the same.

  06.33: A current thr( 0l (l;nhwscyuy1gv:pxw0 h:ough the thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to thlhwsly(p(u w x;v nc:h0:0 1yge lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replacee p+l0t( 5 oaf5d05f,ecu1 +6(lddr dtvsisbnd with LEDs. LED is the acronym for which one of the follodp+0ltfsved+dc5ut d5e r(l i,5 0(1ns6f obawing choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area A.6 j1ru.uxvb 6x It is to be placed into a circuit, 6urjuv1xb .6xbut 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 has twicef3m8/qj mk5pj,bqoo ; the diameter and twice the lengq pm8b,fo/kqjmo j53;th 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 hn. i c+qb/oy2vc l lqyd9b0*+nalf the length of wire X. If wire X hyqc nnlvyob./9 i2db0 qc+*+ las 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 material .b 7jh*0tlu a.ax6kn fis then drawn so that it is a cylinder with new length 2L. What happens to the resistance of th* kan ft7.ual j.6b0xhis material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decid;)9 aona* quufo +)jso79wbfv es to mof) ; v9b* 9uq7)sf aunawooo+jdify the filament. 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 reso*2c zmn7vi qhpyovn.2qt:,1 istors are made of the same material. The length and radius of each resistoivq *h:z vq.n2 ytn 1co2mp,7or 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 connectcqu mh-v ;u-q+o.z/b,xknu/zed to a battery 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 conneuhn .z/vu,co/m +kqq- x-b z;ucted in series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanyinc*vln hl jd ,mu8:c97xg circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 2vu:m*lld9hjxn, 8 c c75.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three f,n2rl mjpl7 :;x8mtj bulbs 1, 2, and 3 - represented as rej ;l nmrx7f:mjpt28l, sistors 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 electrica) yas e//tw4ljl circuit at the right. If the current in all three resistors is equal, which of the following statements must be truelt es// a4)jyw?

  99.37: The diagram at right represex+ rs;urky/ s0nts a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells;k/r+x ru yss0. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the fz p-itw3x3mw7 ollowing statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are havemxp7-tzi3 w3w equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a batter),0h)ah7k b /vlera4kbypay.+v q2sfy. Bulb X is brighter than bulb Y. Assume a bhvkb. )p sa /,f)a70ah4+yl2yqkvrell 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 identified rvc-8(0(trn o kidfi.zesistor in 5 seconds once the (orf(-ickn 8zt.vdi 0 circuit was closed?

  00.23: If all of the resistors in the following8 wo8b,)v1ld mtsr8o yi1s -vd simple circuit have the same resistance, which wouldoy8,vwo v d l)ssmd1-8br81it dissipate the greatest power?

  98.34: In the accompanying circuit diy t:lk(tr fsa8*.6k mx88 s2d3yqa isjagram, the current through the 6.0 Ω resistor is 1.0 A. What isk8s8ai *kftd .j 8 y(t3 rsm2xysl:6qa the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. cba 9q1i mn6 a,yxeswpufn 2,5; hq/xfr pf/3-Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3 dissipates 6.0 W of power. What is the volt3e2q ia f/a pxc/, m1 pb-wsn;qx,5nyff6r 9uhage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel tcccv-+8, p. pl-.kjt rm v6tw wmv/fn2o a battery. Suppose R1 has 2V ac2k-tcf6.-vv .vn/ tw8cm,r j l+pwpmcross 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 maximutw3,) yxtbhy1m value of the currenty) wt3tb1yx,h under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb /m;rki-a-dw c designed to operate at 120 / kiawd c;-r-mvolts?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 w+k75iw kh-y/pf*q f8vguv5hzrg n*9 latts o*yfh gg5-pih vw* 8qz9l5fv r7uk/+knf power?

  05.21: A household iron used to press clothes is marked "120 volt, 69:4b6jn u jje h-o:3 r jgmg7epu8jv/p00 watt.” In normal use, the current in it i/3eu9v j h 7:gnu:b4pm-opjjegj68jr s

  01.05: Which of the following resistances could NOT be produced by a je4h8lzy 4,f acircuit containing onazh4jf, 84ylely three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the y 18e,i v*+dofqqx-o tfollowing equivalent resistances CANNOT beqq fo+,y8o x te1dvi-* produced using all three resistors?

  02.06: Three resistors of differen d2 wq0pz3w1 3b3sgci v, vkemvv05dm)t values can be connected together in different configurations. If all th)c5mvm30w2 wq ,k 3vvdeg dzi3pv0s1bree 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 battery, abwpk9u :8 *kiy;c6hw m 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 m8buwwc*kh: 96kpi; y resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connected owek9:a t95 pf8h8fz1- spvru in parallel, the equi: p9ohf-sv 8 pwa9ez1 5fukt8rvalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such th: z7m,vnlt*w uz- s,ghat it has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that il,-u7 wm z *hn,vs:tzgt 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 oh*q7lucb (cm:nk, q3 ghm resistor that is dissipating 36 wauqcgqhlk 7 cmn3(: ,*btts of power?

  01.24: An electric heater draws 13 amperes of currekq:rcx: /h hq(nt when connected to 120 volts. If the price of electrici ::/( cxhqrhkqty 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 lightbu:b1x; x8omkr0fe kj/3,u pxwulb lit continuoux 3eu,1f:bxk 0/jox mruw;p 8ksly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current ofgso+-xcw1j1o3u 6 0v5 kczl se 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents3-6vjecogx+0 k5 1cwu1zs los the resistance of the lightbulb?

  01.10: Each member of a famiigzyu w+g5o7x8x 0 . (unb)jqdly of six owns 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 t. w)x+ux870(zgog b5ydu jiqn he computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four re nh3tb 5tb,rcabu+ c/0jwjr8k6es4 1v sistors to form a simple circuit as shoa18s4 vbk0cnj 6r,brbt5 +ujwe3/h ctwn 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 form a ycuswi d7kvpm0 9.bv, (5k m8dsimple circuit 7iywksbpd0 dm, vu.5cm(89 vkas 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 a(7algbmwu *p 6ffrd2xsz 5 8k4nd three resistors are connected as shown. With the sw4 gk8m2wxr (6 bfl7fzp d*5ausitch 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 batter;w.bd nr7f m(d vujz3*y, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown inm(zn 7;v.rddfjwb 3* u 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 thre9j2q 2nsu9om 5v skh2x9f 4dvbe resistors are connected as9 5jxhsm2uvv294d2okq sn9bf 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?

  12.14: For the circuit shown to the right, wrsrsj p3h ;;5yf4u sq4hat is the equivalent resistance? Assume that all wires are ideal, the battery has no internal;43 h;yp4sfjs ruqr s5 resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circss4,i3ecrl) zl:jd8 luit shown to the right with resistazl8) jdrc:i,le3lss4nces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identicat/fg6kwb/rw h l +sis6v24n:i l resistors connected in a combination series aws i2n tvksr6/lwf6 4gb :ih+/nd parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below -0b*bzrcajzc+dz ;izps9b8e dt; 8a/t xy 7w,shows five identical resistors connected in a combination series and par r9 /pbt -js8dazbzcdzz 0y+;*tw e ac87i;b,xallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of th2*hns0dvxb lzx(dyux1 q6w55 e bulbs are identical. Which bulb will be the bri5z ydxvwsd 5xn2qx*u60bl (h1ghtest?

  02.21: An ideal battery, an ideal ammeter, a switch and three re :bdi3l:-g0nfw/foam * /hkb jsistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amp:jo:h 3fag*n-/0d/ il bk wbfmeres.
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-vhgn)r7e oxbh o; -z3*jz ofkt ,/n:w resistors are connected as show;begrow/z hnv of hzjn3:o),7-t*kx- n. 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 battery, an ideal ammeter, a switch and o dmi+fn52gf -*ilxwnb 04 dv+three resistors are connected as shown. With the switch open as shown in the diagramon-2nx0ffbmw+ 4dgi5+ vldi* the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?