16.09: In the circuit shown, an electric current exists in the metal r mowovvfr,2y5r(j (g) t kc4:tesistor connected to the battery. Which one of the followifo2o( ) wrv:rjk54t,(vcm ygtng 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 +qor .axcmz(*parallel, the_________each resistor is * (caq.m+rzoxthe same.

  06.33: A current through the thin filament wire t4ctcryz .c : oybatc+6-1s1xof a lightbulb causes the filament to become white hot, while the larger wires connected t6a-+crbx 1 tcyys4ct1oct.z:o the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. vm-(lkv,oh 5* x 3hdbnm- ra9mLED is the acronym for which one of the following choiok3h9h,l5-*mbv( vd am xr m-nces?

  05.16: A cylindrical graphite resistor has length L and cross-sectional area A.c.qn/ 55p+x3rjqcb xa 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 renaqb 535pc c rxq+j/x.sistivity to the old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same matz.x 6fqr 0z sa(mwr*r q+1y1ckerial. Wire II has twice the diameter and twice the length of I. If I hasa(.6rzrf w+z1my x 1qrck0*s q resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter t a+a6z)io9kd and half the length of wire X. If wire X has a resistance of R then wire Y would have a resistanc)o+itakd6 za9e of

  03.23: A cylindrical resistor has length L and radius r.cehw5tg+crhj1- n-9 v ;t6xin This piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of thiswc +x6-- hjhc5;nvetgt91nri material because of this process?

  07.27: A junior Thomas Edison wants to make a b6vk6pwwm:sjpv9 v1* erighter light bulb. He decides to modify the filament. How should the fil6 em wk1s:6pj*vv9 pwvament 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 l7) kvd;n;jpf2.hjj sn *z ktq3ength and radius hj*v; jjkqnftnsz2 dkp7;3 .)of each 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 btvf::cxfgx/v tytpp*u+) )) tattery 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 connect)g)xv:+c*tp p/vytfx)ft: uted in series to a fourth resistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in tn:chc/x:o1( n w3ybjy yjy)u2 he accompanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The awx 2ocyyc:jnhjy/:nuyb13 () mmeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit show zuaq)/qb5+g, n 2jr75muyj f+*wjsyf n to the right. The three bulbs 1, 2, and 3 - represented as resistors in the diayqrbgs+ ,2fwa)5j yu f+/j5 mzjnuq7*gram
- 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 adfyfnjh q9eeoqj;1 zo:e-7 -/t the right. If the current in all three resistors is equal, which9q-f-/7j q fehenzj e:o;y d1o of the following statements must be true?

  99.37: The diagram at ricf-zv2y7vc gyk1s1 *br)bl(c nag 0 q h0;mej8ght represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or gr0;bgb7q 1kn0-lcc)y 8 cjvme2y( a zvfh s*1bulbs)
would you expect to be the brightest?

  00.03: Which of the following stateu cn8ns7+vt4 wments is NOT true concerning the simple circuit shown where resistoru 8 w4v7stnc+ns R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X an9uatsl: f 05ufdY are connected in series to a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected in parallel with each other to the samatfu : lsu09f5e battery, which one of the following choices best represents what is observed?

  06.34: How many cou8) 0i.pijftwd lombs will pass through the identified resistor in 5 seconds once the circuitf0 td.)p8i wji was closed?

  00.23: If all of the resistors in the following simplehjh0zt7 rk* y2 circuit have the same resistance, which would dissipate the greatest h trkj7h*yz02power?

  98.34: In the accompanying circuit d/civo f8*mkz +7.slfha lg7y, iagram, the current through the 6.0 Ω resistor is 1.0 Agi8o7hl sf+ayl,. z/*7 mfvck. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are c:lt qsaw) t7sqm: pvj7lo+:x -onnected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3-q:sps :)j lwxtv aq+t:ol7 m7 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different res*hmxkbax/6 o; istors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is th h /*ax6;xbokme current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What i.v b o)efk*;yasg )h t,2:iomxs the maximum value of the curre ;s,f ik )ho*tog:ba.vye2 x)mnt under these conditions?

  99.23: What is the resistance of a 4) reidpx/g7d +ohk7b 60 watt lightbulb designed to operate at 120 v oed) rdhk4/p +77gxibolts?

  03.09: How much current flows throuvpe0qdg n77 :hgh a 4 ohm resistor that is dissipating 36 watts of powp7v 07 qgenhd:er?

  05.21: A household iron used to press clothes is marked "120 volt, 600v3jsqya/7 l9jse2 um ,. 7akut watt.” In normal use, the current ikv/au7.2e 9u s7mya,st3lqjjn it is

  01.05: Which of the following resistances could NOT be produced by a 5yx e gf+l((h:ky2ofwcircuit containing only three iden5yw(kgl+hff : y(2xo etical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the following equivalen;;f0kq 46qixoqpvig.mf qp +-t resistances CANNOT be produced using all three r.mfpq vop f gqii0;kq6x;4q-+esistors?

  02.06: Three resistors of different values can be connected together in difp c+ 2h*4.zkwbmcmbkud+r0 :bx, hdh(ferent cdubhx crwhkb(cmd. 0mz*h kb,4:+p+2onfigurations. If all three 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 )o9dd*h3 ivqx 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 battery i3dh o9)qvx i*ds zero.

  96.16: When two resistors, having req1x* cgckjl *plw/ .a)sistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the followingl*1c*). pxlgq cakjw / statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a rov .gmbzkh ,x *ftxcz)j8i4)+esistance of 12Ω when operatingtzm g)k h)8.,zjibvo+*x c4xf at 120 volts. 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 flow9 x ; 4,dk:,i5i v*xvgq(drzk)jupblns through a 4 ohm resistor that is dissipating 36 wattbgr,xp)dxn4:k(,q 5dkv*i ;luj vz 9is of power?

  01.24: An electric heater draws 13 amperes of current when connected tuh8vwn1i)q c/ o 120 volts. If the price of h/cnu8 )iqvw1electricity 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 qd / 9(+ ep18wzs)nfon)-og jpcxd/me a 100W lightbulb lit continuously for 1 yearn 9d)8nz ed+ ps/cfo/ xop(je)-mqw1g at a rate of $0.10/(kW.hr) ?

  12.09: A constant curren j6l74 mbfv-idt of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the foll76l4idfj -v mbowing choices best represents the resistance of the lightbulb?

  01.10: Each member of a fam0 +)tix,s;/of c.zice 1jw qgvily of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are pls )/+. tif0w;czv1jc eqio, gxugged into a single circuit protected by 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 connected to four resistors to form a simple u+p pk-xtjgfsv:161d circuit as shown to the right gp-+ :1 uvtk1xps6fjd.
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 :uwvi-6g0)dw* gu brnpqc36 i connected to four resistors to form a simple circuit asgvqcind- w: gb) u0ip6*6ur3w 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 conn 21 qgwonr.25;rz xdsnected as shown. With the switch open as shown in th5rd1rzg2q;wx o 2.nnse 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 batterc l v4kond;5u0y, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammetern5 u; dlc4v0ko reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammete .ffh1 rd1ut:cr, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammrh1 1:utdfc. feter 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 equival+hl5kzmsrz.4e :-k xuent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.rk.54kusl-ez m+z : xh

  09.07: The equivalent resyn *u5 la;nc4mistance of the circuit shown to the right with resista 4cy;aln*u n5mnces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connecp tryajo99 c;2ted in a combination series and parallel circuipy9j;oc9 t ar2t to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below hpm:5hy x+;nhshows five identical resistors connected in a combination series and parallel circuit to a voltage source. :xnmhhh 5+p; y
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit7wb,pw0( * r0rmcrr yh diagram, all of the bulbs are identical. Which bulb will be y( c*rmhb,r0r7p0wrw the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors s;*5xpza*0lgxn + vj/xxoffc f*cbre)l) 63jare connected as shown. With the sw gleo)cl0fn )a*xs35f/cr*bxj+zj vpf6xx; *itch 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 o o* cbytc(d3:tu9+v dresistors are connected as shown. With the switch open as shown in the diagram the ammeter reads ovd* u+c c:(9o dbtyt32.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter,sqpghz/wijt a:,4h/i3noa ** 0lwe5a a switch and three resistors are connected as showni:jpg/ o0wtiaanas *q4 hzl* h3,we/5. 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?