16.09: In the circuit shown, an electric current exists in the metal resistor c xhn*:rkhfq/akp72 e. 1yu6cw onnected to the battukcp:2/*ax1k6 f7new. qhy h rery. Which one 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 resix r+tctwr+x,k brl::en0/ vs1vi -/fostors are connected in parallel, the_________each resistor is the ke1xswc-0tv/+nr orvil f::t/r+,bx same.

  06.33: A current through the thine f -su .)iy;.nbkz pdn-rm*e8 filament wire of a lightbulb causes the filament to eui-fmbsnpn -. .)8ed;zk y*rbecome white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced (vvw*;prjmalr d;: 3ewith LEDs. LED is the acronym for which onem;:d (ap3l w*v;evr rj of the following choices?

  05.16: A cylindrical graphite resist iv/jxzuy ji 8+(,2h4bjk5r ptor 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 pzk/i5,tbxi4 j2 8jur(+ yjhvis 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 samelaq /uqbr0ibx y-;w3 jn*jl 16 material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II has resistanuw3j-brnq;0 b6i1 lay/jl xq*ce

  99.31: Wire Y is made of the same material but has twi iswy.b9s pw+9ce the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a resistance ofi+9s. pw9s wyb

  03.23: A cylindrical resistoc5xq;rzdjq*-bm w ndef c4 36,r 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 w *z-n c r3def,j4bx ;dmq6q5cprocess?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decidec3 0:+g7 ry6fdju/ gctq.pqwjfehl37s to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more lightwlt7fjq hq3e :cg7cy ujp+g f/60 .dr3 at a given voltage?

  16.07: Three cylindrical resistors are made of0 yxh+y q/j-dwo:;eu t the same material. The length and r+ eyh;qo0uj tw/ -x:dyadius 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/wz 5m, d5(8 fe;bm:wogqo nzb 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 resistor.” What is the equivalent resistance of this arrangementnf; dzbgeq8mwz,5/ b wm: o(o5 of four resistors?

  95.35: The voltmeter in the accompanying circuit dia f;.q:hh zc8legram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading if:c eh 8.;lzhqs most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 1, (iv(njinxdv9q ;h1g0 :hv 7lu2, and 3 - represente0( nv9hunq1j hxdv(vi7l;: gi d as resistors 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 psd3xwo:tsj:7u wc,7 current in all three resistors is equal, which of the following statements must be: :j scsuo37pxw,twd7 true?

  99.37: The diagram at right represents a s e7 qi cb295kns(iamz5imple electric circuit composed of 5 identical light bulbs a5 ae7z iscikmn529( bqnd 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simpl 5zd wommg+ x2qi94nk9e circuit shown where resistors R1, R2 and R3 are have e4nio9+g2dz9kxmm5 q wqual resistances?

  17.29: Two lightbulbs X andY are connected in series 6/qltk ; adg1lto a battery. Bulb X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are c; 1ldk gat/ql6onnected 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 0s uhj(g1n.c6x5w)(w ynd ux* cveqa;through the identified resistor in 5 seco;u. v (cd5nwgsqw 6n e 1hc0ay(u*xj)xnds once the circuit was closed?

  00.23: If all of tnk eo:v8 vxd- 7zuhv51he resistors in the following simple circuit have the same resistance, which would dissnv8euv5d1 7 zho k-vx:ipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω rvrr) do;xt6+ oh v-un)esistor is 1.0 A. What is the power supply voltage V? o u)r)ndo;v-6xrv t +h

  97.27: Three resistors R1, R2, and R3 are connectedn8fiyjk0.y af 7-q*ar /nkl1 z in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistancf-y z/7j k aq.*nf180lrikn aye of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors ehvkms,/pn v:apgley ;- )jq(b*q+l0 R1, R2 andR3 are connected in parallel to a battery. Suppose R1 has 2,e;+q)gn/mh * e ( vjqpy0-k vapsl:blV across 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 maximum 0+ ,qxb yh/k u:4o2kkmae/qlzvalue of the curr,2 o ykhumklbq: /qkx4 a/e0z+ent under these conditions?

  99.23: What is the resistance of +)yx*q,s+2mh zlh oc r40i kes qj24ava 60 watt lightbulb designed to operate at 120 voltsovke js)h qz+2ih,0cx4+ 2lyqs4ma * r?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 wp1sr:n-dz 0fmatt1smp0z- rd :fns of power?

  05.21: A household iron used to press clothes is ma9/rzkl 2+ x-k :sd ve.exmy)iurked "120 volt, 600 watt.” In normal use, the current in 2dizk:)r-.x/mukey e l9xvs+ it is

  01.05: Which of the following resistances could NOT be produced by .usb7ww tm;mo3;e5l xa circuit conw.emus5m xl w3bo t7;;taining only three identical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Wyo 3lwi6u7 bf-tx:h,p hich of the following equivalent resistances CANNOT be produced using all t:f,3 l67oyxibp -htw uhree resistors?

  02.06: Three resistors of different values can be connected together in 2p+k5.fu clyzdifferent configuratic. l pk2f5yz+uons. 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 co-xn4i (4fzxi22jmwvzx:1g ,m ,d ngya nnected 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 connected in series using dmn24xa f i xw1gz -vx, 4nj(gm,i:y2zthe same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, havinga y( l2ec8 li-p0inhh+ resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the followae(+ lhpc-lyi2h8i n 0ing statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance u0yz/a js 3xv sh3)dz0of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kg ofxz0ah0z s 3)uvd/s3yj water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows tgd n0tka-7ux(/ zd (yphrough a 4 ohm resistor that is dissipating 36 watts of power? kdg dxu-n((/t pz0a7y

  01.24: An electric heater dq7vou ;m/c :xaco9ih;raws 13 amperes of current when connected to 120 volthcxa;/ iv ;ouom9 7cq:s. 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 ak*r6tq noexp oq9x9 .8 100W lightbulb lit continuously for 1 ytrq.poox9x6e9 n8k *qear at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in 0 zjlvz+ :pj. b-82f2cw ;fln*cbecoln1(zg ha power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the 0f*bvl1 f 2-l82 lw ;cg(c+ejc:nhobznz.p jz lightbulb?

  01.10: Each member of a family of six u;mji8xeqe,( zot(c4c --l ckowns a computer rated at 500 watts in a 120 V circuit zxe om8j4 q(-;(etcc,-iuc kl. If all computers are plugged 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 circuit vj; xogymy3m/) wu 21,rxg ixn (:f8ejas shown to tjvg o i( /2;gw:r1y)3xum,mfj yxx8nehe 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 res5om6eonvikg /x t b(ftf--+y 2istors to form a simple circuit f nb+g/6k-v5o(etf2-omyixt as 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, aqr7(k. pbog qi)u a-)j switch and three resistors are connected as shown. With the switch o7r(aguj-i) bo .)qq kppen 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, i-ll+ -ev ;efua switch and three resistors are connected as shown-fulve-i e; l+. 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 sww9 fq.k yj:0u-f5x4i0 j ofmywitch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperesof5mk:wy9xi . f w4jf-y 0jq0u.
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 equivalent resistance?y1tnq5ss ,06 vex.,gct brj8od s5 3vk Assume that ayc1tn.vj0b3erd,6ogsv5sx58 ,q ks t ll wires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuitq h 0 m-01vmegeh/7;2,vztq8top crad shown to the right with resistanc 0/qgtep;var7d z81e0v mqcth2om h-,es $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combik)o(w4 vcjrheg(.bg87mt,6qq ij 2xt nation series and parallel citeo( wtg.c7m8k(2j6xvgbq ir4 j),h qrcuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistors connected in a comccy8a/ 5h*d2xzxce:*tc q cu4bination tax:*u8x*25q dcycz ecc h/4cseries and parallel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identicald2f kl( buc1+ ( 2lm8qw7dqnxyu)-mhi. Which bulb will be the brightest (hm )781idn ul-wc u+2 byxqkldqm(f2?

  02.21: An ideal battery, aiu:gq93 4hloen ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the iuel3g4: 9qohammeter 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 resistsj3.nsap:vqy( f8 ,tkors are connected as shown. With the sq (n8.,sfsk :t yajv3pwitch 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 arh0mc ys0i6n/3jf2n nle connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperess 2i6mfyn0l/0cjh n3n.
When the switch is closed, what would be the current in the circuit?