16.09: In the circuit shown, an electric current exists in the metal resj+gxs w-d8 wf.,f :pmiistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the respdm :f8gj .x fsi+-,wwistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in pa;g2 zyp/pmg (t-m.huorallel, the_________each resis g-2zmp(h/ot p.; mgyutor is the same.

  06.33: A current through (rt +c/rije)dom 9fy*p l) gm0the thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much coolylomc9d+(pfe rgr)mt*j/0i) er. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED is th7 t9 frjir- ne-k5yl/,enh6nm i+-rqse aq9er 6mil7t /yrkn5-e +rnnj- h,s-ifcronym for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and e : wyr6jso/s; )cdp-pcross-sectional 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 resistivity to the r)e6 p wdoc/j ;yp-:ssold resistivity of the cylindrical resistor?

  98.20: Wire I and wire II are made of the same material. Wire II has tw0 wae .umri,)rice the diamiea)m , 0ur.wreter and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same0j*c o iahn*j7 ,iv0ik material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a resiknj 07ai*v 0*h oc,jiistance of

  03.23: A cylindrical resistor has length L and radius r. 2e9 eud4on3/r sik a7pegr+ h+4lkq;tThis piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this materialnp+rdu2+ao s 7 k43tq gei4/ lh9er;ek because of this process?

  07.27: A junior Thomas Edison wants to makrwsl rc b3a9shd07 h,,agg xe,2gf99ue a brighter light bulb. He decides to modify the filament. How92e rlah 73s gd0,gu,ga9crh9 f ,bwsx 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 materialpbe//n- 9u(nastyl i5. The length and radius of each resistoiapu/nebt95- y (/ nlsr 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+;q-y0c ayqt w, each of resistance R, are connected 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 aq0y;+-twq c yis 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 internal resi0f )v( to2zfzc9gpdi/ 9uawd2stance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The zwc fv2) 2z9uao / 9f0dit(pgdammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compougsk7lcri:kf(c 1f 8xn*yx*,s nd circuit shown to the right. The three bulbs 1, 2, and 3 - represented as resisto(1yck7n s*c,g f8x*xslrkfi: rs 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 circuit at thk(fnq65lc jl./3 e voorst14le right. If the current in all three resise lool45s. 1 kcn(6r/v3q tjlftors is equal, which of the following statements must be true?

  99.37: The diagram at riseno . 4d4cu*yght represents a simple electric circuit composed of 5 identice*un4.s dc4oy al light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements do::u7 lx eec3lt8 p;iis NOT true concerning the simple circuit shown where resistors R1, R2 87cpdi ;lo:ele:x3tu and R3 are have equal resistances?

  17.29: Two lightbulbs X53 awg*dtla-n andY 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 otheawn3 *d t-alg5r to the same battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs wilpdsm f799zz, ll pass through the identified resistor in f9 pd 7zz,ms9l5 seconds once the circuit was closed?

  00.23: If all of the resisto6ftwwxvls.5x2ehq0 n-3mb a 5rs in the following simple circuit have the same resistance, which would dissipate the greatest powq 6nb sw hx-2f3xvmae5t5l0w.er?

  98.34: In the accompanying circuit diagram, the cuc5tgjswukqe7p,m ,wkha u i9/4i/s7 tl1f/i. rrent through the 6.0 Ω resistor is 1.0 A. What is the power supply voltage s59c7giuh.e/squ m, w/,pi /kiwt1ltjk 7af4 V?

  97.27: Three resistors R1, Rq-* r;zo c.utlwjny k ex/j,4+2, and R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A,jcz.+ -;j qukerl y*tw x,n/4o 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 resi*7 ;ojz -a5us:fhjfrx stors R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissiuzfra:x o 7;jj-* 5hsfpates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is the mau8tv4 x 0s-ogiximum value of the current under these cond0-ox 4 istuv8gitions?

  99.23: What is the resistance of a 60 watt lightbulb designed tr gip gtehdm;az. v(sic (2ws2 71+ek5o operate at 120 volts2dm.r;5hkawig vc( 7sspt12(z ie+ eg?

  03.09: How much current flows through a 4 ohm resistor that is qkn /opvh7fil0 3/sv9dissipating 36 watts of sv30p/o/fln9iq 7h k vpower?

  05.21: A household iron used to press clothes ixe c3 vykvfh1h (8rq+bb1 24azs marked "120 volt, 600 watt.” In norma b1hzyb(kv+hxf4rav82 c 3q e1l use, the current in it is

  01.05: Which of the following resistances could NOT be produced byr.ekvl8fm*:t w :s / 8qcitp7j a circuit containing only three identi8 8. t:e/lkrtmp fvciqjsw:*7 cal 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which op ou;4ce; ns5xf the following equivalent resistances CANNOT be prpcu5on xe;;s4 oduced using all three resistors?

  02.06: Three resistors of different values can be co4 mp( r( *:wxyqecwl4unnected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be producerex w 4l(w cuyp(qm:*4d?

  97.35: When a single resistor .9goj+.chnrhd.yo/z )o yvw *m 0lv8y is connected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circu o +od.wm yv.clzyj)h0nyv8ogr*/ h9.it 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 ra)s7oq 6*dowtiobcy( -:gc:m esistance R1 and R2, are connected in parallel, the equivalent resistance of the combi:y* md7bg :q(sao c-i6oo)twcnation is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when operan;k(nsm ;dc (bting at 120 volts. What is the minimum as (ncmd;; (kbnmount 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 thro9e . b,x;qo5*zbtzpqv ugh a 4 ohm resistor that is dissipating 36 watts of po .;vxb9bopqz5zt, e *qwer?

  01.24: An electric heater draws 13 amperes of current when connevzw(3bl x w-k9w1lcsiov,s.5 cted to 120 volts.,lz3 1bi9c(soswwv lxkvw 5.- If the price of electricity 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 co jauos8kv ., ye)tke83ntinuously fo.oesy kv k,ut3je8) a8r 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbaflua9xap1/nt n+- j0wiqrn()5; m ubulb results in a power of 24.0 W associated with thn59+bpmn/0;a l u-an tiuj( arxf1wq)e bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated k8wjxu(m*j,b i.zo e +at 500 watts in a 120 V circuit. If all computers are plugg8e+.o(ziu* xjm,bwj ked 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 circuiyjg+f+ cfbdvhqplum u ,in(a8 8w*6/t0s6au,t as ,mnh pub6, f6 *ag8faysd+qt/li0 uc(u+v8 wjshown 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 simpler 1iab tfel)27 circuit as shown to the right. ba1)lt7e2i rf
What would be the potential at point B with respect to point C in the above circuit?

  02.21: An ideal battery, an ideal 0 tv4 8ej*0y7yfxctbf ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter readsyttjbfxcy 080 7fe*4v 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery,tfsw20sqzt*t g n; 5l; an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amp*s t ;gs5nt0 2;ztflqweres.
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 are conr: qld rc17a4wp k4a/pnected as shown. With the switch :cr4pdk1/ qwr aa4pl7 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, what is the equivalev2u..pbfpfc b;s7a gor:s4 c 1nt resistance? Assume that all wires are ideal, the battery has no internal resista cb:rgspb..sv74 fcfao1 2u;pnce, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuidjkwrcy:c4 x8 )x,( il)5y ztgt shown to the right with resiskzyy( l )wj ,x:gt4r8d)5cixctances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connect(kx (gwr4 w1 gnd/kn*aed in a combination sergw1((4 nrg/ nawdkx*kies and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistor9a)3lb(9d he qu/rtg(i ed g)hs connected in a combination serie hi)a)3qugghltedr/( 99( deb s and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, alldyuxl8 c -it11 of the bulbs are identical. Which bulb will be the y1xld 8c uit-1brightest?

  02.21: An ideal battery, an ideaq mswza;/ s;rq* 7/vhol ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the s aoqr7hw/vqm z; *;s/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 e7xujf 7p2p (bare connected as shown. With the switc72x b7f juep(ph 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 id/ch c3)ns,b7yjw f js3eal ammeter, a switch and three resistors are connected as shown. Wi/s37 hf cjb )jyns3c,wth 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?