16.09: In the circuit shqa+ dic2itx+ 3h6p3dk own, an electric current exists in the metal resistor connected to the battery. Which one of the following choices best d +236cii3qhp+a k xtddescribes 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_________each resio4 l,rhdw35 rus3 urh,w4rd lo5tor is the same.

  06.33: A current through the thin filameghc -x9ks+1qn nt wire of a lightbulb causes the filament to bec xn+c1sgq-h 9kome white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard househo3j5b)nu5qp 801 vgmx jl5m cnfld lights are being replaced with LEDs. LED is the acronym for which one of the following choic1gvn3 5)5b8jj05lfq xn umm pces?

  05.16: A cylindrical graphite resistor has length L and c) w9nq7orp jm7. a6cdyross-sectional area A. It ismn9a do6.qrwc y7 7)jp 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 resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has twice thetrtfcd j-ik + 6nl8(9h diameter k tnhd+r-8(fl jtci9 6and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made ofm3ty3s0 fy.fp the same material but has twice the diameter and half thes yf03ty p.m3f length of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistohjpddml(8c:4l*a56sklnei lnd f9* x/ j e6,or has length L and radius r. This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this mate pl*4lj/9lm8a *dhxk5j(el s,n:f6ed6di ncorial because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb.-0)dwajks3i -unk3 cfe:v lb7kes2 2q He decides to msde)kqc w3a0-sl2k 7-k j:2fu n3 ebivodify 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 resistors are made of the same material. The *y4t4(5 lrpofm+m o dilength and radius of each resistm+mp i4y4o*rold 5tf (or 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 th--i+tfg:c lnf e following way: “Two resistors are connected in series. This combination of two resistors is connected in parallel to a third resi- cft: -fnig+lstor. 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 accompanying circuit diagram has in43z;wzddwt0z p tb++ iternal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The it+tdzz 4w 30zw+; pbdammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shownmop(9 9 s 9mdysd+;edj to the right. The three bulbs 1, 2, and 3 - represented as resistors in the diagrd9e9mdsdj;(o py m9s +am
- 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 kw7 xbzn5k l9.-;kqvhcircuit at the right. If the current in all three resistors is equal, 9k;vbwk-k57 qlz hx.nwhich of the following statements must be true?

  99.37: The diagram at right represebo g.,cs/ xp;knts a simple electric circuit composed of 5 identical light bulbs and 2 flashlighg;k/psbox. ,c t cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is Nxn ;j4tg5)b 1+nc f4kszis 1ifOT true concerning the simple circuit shown where resistors R1, Rsi 5 f11n;b fzkgt4isx+4j)c n2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY 5i k0 e(iua9r l.9 lg*h+sbxhgare connected in series to a battery. Bulb X is brighter than bulb Y. Assuilr9(a x s5gbg0e9+hh*kul.i me 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 identified resistor in 0m2kuilebyc1i)mv p a) * s*p05 seconds once the b*)m *s1k0pav2 c)pim ie0luycircuit was closed?

  00.23: If all of the resistorsh2urndp 0rw 96 8a)sch in the following simple circuit have the same resistance, which would dissipate rh6wcdrhn9u 20ap)8 sthe greatest power?

  98.34: In the accompanying ci(89fbaqlggb .rcuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply voltage V?a gb gfb8ql.9(

  97.27: Three resistors R1, R2, and R3 a e.m4f 1g r-d5)v d:*dlpiflgire connected in series to a battery. 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 voltage across ipml)ffli5 .dr1d ev dg*g:4-R3?

  99.40: Three different resistors R1, R1 *1ups3*ldyb/dl yzg2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. 1s1 *zlypbyud*3 l/dg What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is toek5*i:tk 4 cjibc )7id- aal+he maximum value of the current under these)7:clko ck -*ijiaed+tiab54 conditions?

  99.23: What is the resistance of a 60 watt lightbulb de7(v porr/(bvbq9vhyhcdo(736gqs i6 signed to operate at 120 voltcsvgph7 (7q(odr6qvv9i6 r byb o3/(hs?

  03.09: How much current flows through a 4 ohm resistor that is dissipatin z6,kko z cn.2e+c +-.jkg)y fuvvlv2qg 36 watts ck ,zf)zku -+ 2kj. v6v2eq+gl.vyocnof power?

  05.21: A household iron lfub(81p 44aacyym1s *fgwp2used to press clothes is marked "120 volt, 600 watt.” In normal use, the (8y1 4 1pa2mywuffglcbp4 a* scurrent in it is

  01.05: Which of the followingyjl +6, 9rtm ipxxq7a07ktdk5 resistances could NOT be produced by a circuit contay5t r aki90m7lkqt j7x 6dxp,+ining only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the fo+ k,1ijn9p-roz0jl m4 q-cvd hllowing equivalent resistances CANNOT be produced using all three res--j i1vc 9,40+orz hqkp jnldmistors?

  02.06: Three resistor(j+kb .94dco:j-juu bsn6 p 4qbgi v)fs of different values can be connected together in different configurations. If all three fbdu)qo+j ibj4:k n-vu( g94 .b6pcjsresistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is conneczi8 3b 7jr-sugted to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical res7-j3ub8 rz gisistors are connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, hl1shg9kpp82 having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following stl8 g2 hs9h1pkpatements about the resistances is correct?

  02.46: A hotplate is d99kc i( qpnqa07x ff1xesigned such that it has a resistance of 12Ω when operating at 120 volts. What is the mkq7cf1xqap x 9f0i( 9ninimum 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 curren+-; pep8zx vi.opm1 2n1stpkh t flows through a 4 ohm resistor that is dissipating 36 watts of z s1k2 +poh1 xppmnveit.;8 -ppower?

  01.24: An electric heater draws 13 amperes of current g5kpruj 3zp**when connected to 120 volts. If the price of electricity rkpg 3juz*5*p is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would it cogap:qw md95fbs/ocprm v32 6, st to keep a 100W lightbulb lit continuousoag6m mv: 3q5s/ppwc,2db9fr ly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb resulthj .vcho /;jt3s in a power of 24.0 W associated with the bulb. Which one of the following choices best reprejth .c/3vh;ojsents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rate * uxww.ygym *yd1ne44d 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 maxi*4x w1un*4wy eyd ygm.mum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resr;6qt+y:ic , u)by1ayws5 fwbistors to form a simple circuit asay ruyy:ticwb6, bf;s +15q)w 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 bb0b.(c0to mhform a simple circuit as shown to the right. m bb0o.hc (t0b
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 swiimq( yyyabe-pl3d,rx5 x ,x ,2tch and three resistors are connected as shown.5 (,xy irly 2axpdq3mbx ,,ey- 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 a 1et. afbi ss)xa3wz 3- zb;nv7e7flu:m/4fyresistors are connected as shown. With the switch open as shown in thfl3i .:4sf3b bse)mu7;-ae 1nf z yaav7z/wxt e 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 ammeterbpi.k) rclcy- 6hc,2r, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammetlrcb-icrp2 6k.y h,)c er 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,su g(rljcwf :ut*67b6 what is the equivalent resistance? Assume t6w7urc l *:fg t(jb6ushat all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit s l:z/ nzg:p t3/pxi(vvhown to the right with resist/ nv3 ppv:x(/t:izl gzances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combinawh3 -5/ak ygr 5tlc-vition series and parallel circuit to a voltag yc-a5 3vt lr5whigk/-e source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors co; ijfz:.d( zfonnected in a combination series and parall(ffj:.o dizz;el circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagrary.cxo *sb6b2f ch)f*m, all of the bulbs are identical. Which bulb will bef*hbsoby6 x*f)rc c2. the brightest?

  02.21: An ideal battery, anxxvemty r12 /l2wmmx 8jc+n,: ideal ammeter, a switch and three resistors are connected as sho c28mtmr2 ,xl wm/xv+:njexy 1wn. 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 resistors are conhb8r0dx cyq: ;.rx jc,n/5shi yn:le:nected as shown. With the switch open as shown in the diagram the ammeterj85r ;:y xcxrdb n:q./ie hcl0:,ynsh 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 resippken 3,*ertfbz7t)h 41is tmdxk:0.stors are connected as shown. With the switch open as shown in the diagram the ammeter r 1npfi7ebk3,kt40 :h*.tdmp tz)xreseads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?