16.09: In the circuit shown, an electric current exists in th -+nmq-7 lwpk(bnko.ge metal resistor connected to the battery. Which one of the following choices best describes the direction of elem kglqk+ o(--n.7pbnw ctron 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 y 0lm- :q4sube;nqoh-in parallel, the_________each resistor is the s4:hu q-bn -qoyem;0lsame.

  06.33: A current through the thin filament wire of a lighh3 3:vfvhdd viu)3 l 41xey8tztbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happen h313i:l z edy4v8htudvxv)f3s because

  13.08: Some standard house4vl,byuw2/em zx;4s q hold lights are being replaced with LEDs. LED is the acronym for which one of the following choiys,z4 l2x/ ;web4qmvuces?

  05.16: A cylindrical graphite resistor has length L and cross-sectionalh 5jtf/z xc c6+9.q8t 6euvfkj area A. It is to be plactk. zfvjujtx5/8 ech f9qc6 +6ed 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 thkyc+ 9(ca4yg8c vus2rs.ik p3 e diameter and twi9 yvr u2 84a gsscck(ik3c+.pyce the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has thy4z6z0rbdyh2 oxo. .wice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would have a resistanc. o x4yz.2zy bdo6hr0he of

  03.23: A cylindrical resistor has length L and radius r. This piece ofboric8 wi*3b , material is then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this matco, br*bi w8i3erial because of this process?

  07.27: A junior Thomas Edison wants to makf3l v6qnn*d/ty b5h 7fm;1uofe a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb hvdof;u3l 6m nqntfb 7/y1 f*5produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material. The leng up ig l9-.m+.x6axercth and radius of e+c 9eixxu.-g. pmr6al ach 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, hkxn9(w )eu/ gare 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 resistnguhkx/w)(e 9ors 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 inter66vkjogrv 2 zd3s1q1mnal resistance 10.0 kW and the ammeter has ing1o1rkzd6jv6 v2 sqm 3ternal 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.wephhr- r b735 The three bulbs 1, 2, and 3 - represented as resistors in the di5hwh7 -re pr3bagram
- 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 cirvxhc 0gpcy pl:(au 3y+ pov34+cuit at the right. If the current in all threox0 hacp+p4clyg3: pv( y3u+v e resistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple et uas-z/h--bj 69xs molectric circuit composed of 5 identical light bulbs and 26-9- jb-atzxu shm/so flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statemi,pi5 rtt3 b)rents is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have tt p)ir5bi3r, equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bul v xzqy946qk -zyauj1th/gf51 b X is brighter than bulb Y. Assume all circuit elements are ideal. If bulbs X andY are connected inq yyjhtz14qx 9v kg5za-fu/ 16 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 tdce o q;/qekyt4n ;q1;he identified resistor in 5 4 c;o;deq/ qq1k;ytn eseconds once the circuit was closed?

  00.23: If all of theq, ): ayzzyuk2xk4yw+ resistors in the following simple circuit have the same resistance, which would dissiyak,y4 wu yxzz+q:k)2pate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6.0 Ω resif7bb,fv 9 mu8tstor is fm8v,f bubt97 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are connected i7pv +6-svbr vws3 yq4zn series to a battery. Suppovsb+r-3y6p z47 sqvwvse 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 R3?

  99.40: Three different resistors R1, R2 andR3 a +lp/(bi +nvcxhi .u:are connected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is b.h:n pa cx l+iui(v/+the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is th :mkktfka- 3sg56otr 9e maximum value of the current underg- fo 5k63 rakm9st:tk these conditions?

  99.23: What is the resistance of a 60 *zcs 7 )icfn(k+.wkdh watt lightbulb designed to operate at 120 vol7c kdw kn*(f+ci).hzsts?

  03.09: How much current flows through a 4 ohm resistor thatxl9er,7 d//pysb e5- peri; le is dissipating 36 watts of /ber/5-r dpelxesi;y9p7 e,lpower?

  05.21: A household iron used to press clothes is marked "120 m7bw8 j1c 40iog9rarkvolt, 600 watt.” In normal use, the current ink ac7wm94 brg081jrio it is

  01.05: Which of the following resistances could NOT be pr 5xf;xviuh.o 3oduced by a circuit containing only three identical 6Ω ; uvx5.3hfo ixresistors?

  94.37: You are given three 1.0 Ω resistg6 c:oi7d83l1yz cme oors. Which of the following equivalent resistances CANc z6:clo7ie oy g81d3mNOT be produced using all three resistors?

  02.06: Three resistorq5:dnur 3+jki ). zdqys of different values can be connected together in different configurations. If all three resistors are used in a circuit, how many different valuenk.i yq:dr +3 zu)q5jds of total resistance can be produced?

  97.35: When a single resistor i+ exi4jy,ok v5s connected to a battery, a total power P is dissipated in the circuit. How much total power is dissipated in a ci vy5+ kjx,eoi4rcuit 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 resistance R1 and R2, are connected in paralxm g /rf* +3gnz4hoqz4d2-l pvlel, the equivalent resistance of the coz n g 3ogd2fzr4q4hx*+-v/ mlpmbination 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 12Ωiosz 721jqp 1q when operating at 120 volts. What is the minimu1qjq72opz si1 m 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 f* v6y:rgin s:flp*j i7lows through a 4 ohm resistor that is dissipating 36 wat vps6:l:rij* 7g*n yifts of power?

  01.24: An electric heater draws 13 amperes of current when connecteddhp*mz3hj0k46h 2ouv to 120 volts. If the price of electricityuhv0j2h m h3pzo *kd46 is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how mu ar7-a8 2j,42wn cup29k n ozml0bbmqych would it cost to keep a 100W lightbulb lit continuo0k7,ma- 48 y2rm 2ac2u qwjbnn zop9blusly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A thr/xjsp 70xkh :aough a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choi 7p xas0k:j/hxces best represents the resistance of the lightbulb?

  01.10: Each member ohh lliuejg/4iil5. ,n)r. ru-f a family of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a singliirllirjhg) /4 - n,l.u5hu.e e 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 fos,1/mzvymh) qr-shg 9ur resistors to form a simple circuit as-) 1zm9sg,m rhyq h/vs 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 t7( z*c, ik:rlreq/qldo form a simple circuit as d: eczqqk/rrl*7i l, (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 r-v1fqyhekxn-6 4yk10c y;kmm ldn6 - pesistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampere c-4lkyy6p 1nnfhvxm0d mke 6y-;qk-1s.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ammetez ;avp ( ,smtyd idbo.quib.)u)5 g-x,r, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0v z.abt gd.s);5,(uqx,o) ypiidu-bm 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 are c 8y)qp:vnoz t-onnected as shown. Withz) qt 8np:vy-o 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?

  12.14: For the circuit shown to the righ+q ko6h h2cyuq-.ghx8 t, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and +gkcq. y6qo2xh-8h hu all three resistors have identical resistance R.

  09.07: The equivalentz:m ) yi5eafo/zc 1*oo resistance of the circuit shown to the right with resistancao/f*y)ezo iz51 m:oces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identicah ti.9; l8rnlooxt.8jl resistors connected in a combination series and parallel circuit 9ti;th o88.n.o l xjrlto a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five iden p61qb x5bx0 ,4jsxf ztnbz d;h;u+j4htical resistors connected in a combination series and parallel circuitdnh,;zj4tf1pb5s6 0u4 xbj+q;zbxhx to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diahvob3 ;rf-jm+(mu)lsgd6wk:7k2 a/n evug( x gram, all of the bulbs are identical. Which bulb will be thevg rl mk-3u(xhgw/esbmd+7jn )ua ;kv(f 2 o6: brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors arfq m -idg 3zcn0(5/l qcnqg2c(4k/om rix0-ece connected as shown. With the switch open as shown in the diagram the ammeter rea n lcqzc k 2x//i m(iggcre- 3q0df5-omq(n0c4ds 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 rescq )2(0njsdm tistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0q c2j0t n)d(sm amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammete0: hw tjane.q;r, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reatqjwh .;0:na eds 2.0 amperes.
When the switch is closed, what would be the current in the circuit?