16.09: In the circuit shown, an elect16d h*a x1agrsric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flh116 a xrg*sdaow 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 az)mx o.wmjhkhh ;sf tuh 2u3-8)k(i8 resistor is thw u(j.8ahk)x2omh8 ) f mh-zu3s;hkite same.

  06.33: A current through the thin filay6wor0dk 8 fs85 jtktj5e3 0zument wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happeso djkf 3yz850trj5 8tek u6w0ns because

  13.08: Some standard household lights are being replaced with LEDs. LED isy/o6ihvxhq3zo q8 ;i*x k.ae4 the acronym for which one o8ixv6q; .yh*i 3zxke4hqao/of the following choices?

  05.16: A cylindrical graphite resi6j*xjw +yy. i-x rw3xustor has length L and cross-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 tox*ir.xw-w xjy+ y 3u6j the old resistivity of the cylindrical resistor?

  98.20: Wire I and wirevtmzkb 0 pte-drs1006 II are made of the same material. Wire II has twice the diameter and twice the length mv-1t sz0t pr0keb6d0of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but hake c;gk -5, v)mvr tnvd/3b)nes twice the diameter and half the length of wire X. eg kvm;dv, vnn)kb-/53c)tre If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resgx4r n/ /udxt0istor 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 material because of this proceu/dx xr4t/gn0ss?

  07.27: A junior Thomas Edison wants to makex:ybawf8 1yv7 a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in8a y wfby7x:1v order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. Thc,e6* +u75yumwgk fat0 q9dbx e length and radius of each ky6cgq0*m f, wtaudb95 x7 eu+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 resix q3+jc) txi.3pa;bndstance 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 is connected in series to a fourth resb + xi)t3naqj.;xcd3 pistor.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuit diagram hw, whl2u aa9a0as internal resistance 10.0 kW and the ammeh0a, a 2luww9ater 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. Thl)z8vl v-c ze8,zqzq2e three bulbs 1, 2, and 3 - represented as resiv-ze8c2)q8 lz q,lvzz stors 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 the right. If the curr1 gb:ri*e k(ppent in all three resistors is equal, which of the following statements must be trug ber 1p*:(pike?

  99.37: The diagram at right represents a simple electric circuit composed om :bpdxu rfj4e(0ar 50 ack6v6f 5 identical light bulbs and 2 flashlight ce xfa jv504k6d:mr( ace0b6purlls. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements j cugh fl6nyod 64;3l2is NOT true concerning the simple circuit shown whnd lulf; 646yjg2 cho3ere resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected ii;8we /xn8 cravvi 8aa4r0r93kwr4 bin 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 same battery, which one of the following choices best represents what is ;bcx8 riaw ki4evran4a890irr 8 /3wvobserved?

  06.34: How many coulombs will pass through the identified rei0ayc4ee r **1 l0hg v2use2mhsistor in 5 seconds once 2 0eemu4veih 2*ylca *g10rhs the circuit was closed?

  00.23: If all of the resistors in thmtw0+ tbceh :9w2a9cp/vr cro -; z4mxe following simple circuit have the same resistance, which would dissipate the greatest0;c / t rcw9:24c -ax9br pwehmmotz+v power?

  98.34: In the accompanying circuit diagr6rwn gc2jo42y nfd ,g8am, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply volf w46 yo2cnj ,g2ndg8rtage V?

  97.27: Three resistors R1, R2, and R3 are connected in series to a battery. :jeajtq5k8 lxd0ji +:Suppose R1 carries a current of 2.0 A, R2 has a resistance of x0ea+djqki: 5l :tjj8 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2*q/10jn lmczlczz:yy4 y m0*d andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. Wh*czjny0:mq/40 ym y*z z lld1cat is the current in R3?

  99.13: A heating coil is rated 1200 wat6cxt6d4 jq )snts and 120 volts. What is the maximum value of the current under these conditdq)sxjnt6c4 6ions?

  99.23: What is the resistance of a 60 watt lightbv vkxbszs l .v;tu(a:82rd/2je b5 5wiulb designed to operate at 120 volts?t5 kr2(sjz ;bd w. /vve85lvxu ai:b2s

  03.09: How much currek:uztxfwbt dh02 :)z :nt flows through a 4 ohm resistor that is dissipating 36 watts of powebtz0fxuzwd:2)h: k t: r?

  05.21: A household iron used to press clothes is markuz;dr s40 ,bi1zh2my7kxc5g k0wwz26pbj* pned "120 volt, 600 watt.” In normg2bk,uhmjps6 0 kxipbnrz; wdz5ycz*7 4120wal use, the current in it is

  01.05: Which of the following resistances could NOT be produced byn8cdu -du5su) a circuit containing s5uuu - d)dcn8only three identical 6Ω resistors?

  94.37: You are given three 1.0 -0c0qgh-o xwi Ω resistors. Which of the following equivalent resistances -0g-w 0hoicqxCANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together in differeq kxnt-6tp .gxuj;z0: nt configurations. If all three resistors are used in a ci jtg6nt.z0x xpu-k;q: rcuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is0bzm2pb *r w4hy*y6vyn* te(g connected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors are connecv ybg*bwre4hy 2zy0* 6pnt*(m ted in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors,2k8ia 5fb)l v xeswf-4 having resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resisv25-lib 8wf)4fs exka tances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when operat4b: , yq-l6tjotkm0a zing at 120 volts. What is the mkz,qj:t y0bo-t6 aml 4inimum 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 flo1 x zr5fjc6jhb*+2enzws through a 4 ohm resistor that is dissipating 36 watts of pow5h rj+b zf*xz 2necj61er?

  01.24: An electric heater draws 13 amperes of current when connected fm 6b1 04o gigfo3 r:)mtr*d1fryiew7to 120 volts. If the price of electricityog *7tfo iwrfm1meb0)rr:6d1i3 gf4 y 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 contez4 j61jtz f2evfkux*56:; ,n blknapinuou ,vlzpnxk6 j6 k 1ebe2 j*z4nffa:u5t;sly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lif55b b 4g*nk/kt3m28,6 kabsrnutpy bghtbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistanctamk5k*5pr8 3n6n,bbu 4 ysb2f gktb /e of the lightbulb?

  01.10: Each member of a family i-.*p q q(gqjsrn2eapg5rr+1 of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plug q gp 5(ra*2gqq.je- sinrr1p+ged 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 circui ,oxh6xxh xny4g+ja57(bn w5p+2i nuut as shoh+2b xnn x4,hu7 jxynxo wu5 5pi(+g6awn 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 tcu8bc4i 7dqv/ zz1mw egb *( 9rd-thn8o four resistors to form a simple circuit as shown to d /8z m-4c eibgz cvw9n*8dtq 1(uh7rbthe 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 as ;h/y ip7m)okre connected as shown. With the switch open as shown in the diagram the am mkh ;yi/7p)someter 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 ammeq2 nxvu5r,-2k/w k pwtter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amp uq- /kvrtxnk,p25 ww2eres.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammetfiibk8f: 5x984vhzzz er, a switch and three resistors are connected as shown. With the switch open as shown ix 4fhiiz :z8k fvb859zn 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 .giam1gdi6- * +gahl nshown to the right, what is the equivalent resistance? Assume that all wires are ideal, the battery has n1al iadm +igh*.g6n-g o internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent r2(p5 l fgbixyp,dhx w98e0 1hwhcbn5 4esistance of the circuit shown to the right with resistanc,exflb g8 bnph d(xi2 y4wp 0h515c9whes $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a /1b/2y5:luvemyt; y :oyb hvqq)0ydi joo*p0combination series and parallel circuit to a voltage soiquy)jb 0h5e/ l tyqov:2;yo b :yvopm/y*1d0 urce.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five i7/idmp*ch9j vdentical resistors connected in a combination series and parallel circuit to a voltagcv*di/7 h j9mpe source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identy 5:5ih/ -r dqzfzxb6wical. Which bulb will be the brighte 5qzrw6zx yhd/bi5f:-st?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are coox2r 3 t+yf6yfnnected as shown. With the switch open as shfty x3y +6rfo2own 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, mlzftxaz80+j z*9,cj an ideal ammeter, a switch and three resistors are connecte t9zclza,f0x8+ *j jmzd as shown. 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 three resistors akx nlcn*-u2qt w)*3 1vx1m-m o6hwtqnre connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 c- *nxtt 61 3ku1)n2nwmvwxol- qhqm*amperes.
When the switch is closed, what would be the current in the circuit?