16.09: In the circuit shown, an aief,)i95lt .(nuqd,n9obvo electric current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through thdq,,l) oobi tn i5nuv 9ea(f.9e resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four resistors are connected in para 0+nuonl+im8c llel, the_________each resistor is the ncimno0 lu +8+same.

  06.33: A current through the thin filament wire of a lightbulb9rn+ 41po v m)h vxebbc(oha2: causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because9:b(v hhcb+14 ra2npo mvoe )x

  13.08: Some standard household lights are being red;24 sfmbcr31ax s 2iiplaced with LEDs. LED is the acronym for which one of the following choices b fi;rsxa43d12s2cmi?

  05.16: A cylindrical graphite resistor h2.cowukc0sr+ m8n4 eeas 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/nr0 + coms .e2cuk48ew2 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. Wiret r4a8l1bzz)g II has twice the diameter )1 4 tzlbzra8gand twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same materi0isns 08l 3azqal but has twice the diameter and half the length of l 0a3ssq nz08iwire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius rff sv9;kgk7p 1. 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 beca9k vspkf1f7; guse of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He t s27v14zbfwndecides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at az bn21 f74wvts given voltage?

  16.07: Three cylindrical resistors are madeyn7n-.cc 0f*bi8c obh of the same material. The length and radius of each resistor 8.0b7cync*o ci -bfhn 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 agvu 3(s 4d41 v m*2tf.qkulsbm 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 bs23s4kt 4g1m(v l.umuf *vdqof this arrangement of four resistors?

  95.35: The voltmeter in the accompanyingv.:td(qhg8 rpjkr l 82 circuit diagram 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 is most nearlqk2j t8g(8 dvrh:p.rly:

  97.37: Consider the compound circuit r1 40-i 5y p(y7zxs hblnisy/yshown to the right. The three bulbs 1, 2, and 3 - represented as resistors in the diagram i7s / inyxbp y104 zyr(-ylh5s
- 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 ellfl0j)v q-,vk5 s)zml-c; pggectrical circuit at the right. If the current in all three resist)s,0vqlcjpf)g5lz- g m- vkl;ors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electrui-f)ybbs8.x v, z+vtic circuit composed of 5 identical light bulbs and 2 flashlight c s+y)v. 8btf-xuiv,zb ells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is Nbm zzr./h*i .6dfbhi/ OT true concerning the simple circui hih/.b.rm 6b/*zidzf t shown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andxy tcnh 8.dy0m;dn);.oqz o1n1b 8xmxY 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 connectmnxcx11 ny.mz 8oy.d) ;0d;hboxn 8qted 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 thrhuic 8335n y5lqoiqz7 ough the identified resistor in 5 seconds ony5qlu i8 3qoi3hczn5 7ce the circuit was closed?

  00.23: If all of the resistors in the followin,a+h taeg.:s t5ptyt9 g simple circuit have the same resistance, which would dissipate the gre9htesg.pa+: tay , t5tatest power?

  98.34: In the accompanying circuit diagram, the cu/ ffz kdv s ux9q*rl9r7(r5j:jmhnq-.rrent through the 6.0 Ω resistor is 1.0 A. What is the power s-hrr:/9nxvjf*qul 9j(f mz 7rq5d s.kupply voltage V?

  97.27: Three resistors R1, R2, and Rnk kxdob*8be- :2:alg3 are connected in series to a battery. Suppose 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 vk*:kbnoe 2-bx g:da8loltage across R3?

  99.40: Three different resistors R1, R2 andR3 are conn):e p8rpy.sadected in parallel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipatp pd.rsy e:a8)es 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. What is the maximum s794p 0 mlusk;cdonq3value of the current undk93 ps; 0umc7sn4qdlo er these conditions?

  99.23: What is the res+ w)q o.f6cgglistance of a 60 watt lightbulb designed to operate at 120 volts?6+)o.gw c qglf

  03.09: How much current flows through a 4 ohm resistor thx 4 ,zbdvc3n:gat is dissipating 36 watts o:z n3 dgbxv4,cf power?

  05.21: A household iron used to press clothes is marked "120 volt, 6*/xor 1 g2hlgcuw 6nk200 watt.” In normal use, the current i wxn/k16o2cghg2rl u* n it is

  01.05: Which of the following c +ngt *vqkq( (5ct+rqresistances could NOT be produced by a circuit containing only three identical 6Ω q+vnc q 5( (tkq+gctr* resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the foll4:c7:arzsf xubr iz0mjy:l(ur3j)hb + x0 b,yowing equivalent resistances CANNOT be produced using all thr+ 7xl,srzyjb:cm:rf )uay40(b3bx :ri uzh0 jee resistors?

  02.06: Three resistors of different values can be connected togetzxd/ 0colh2m 0her in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be produced?xhm 0c 0dl/zo2

  97.35: When a single resistor is conmgq 7of).qmct 6/h :kw+y f 8;e/hvgdjnected 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 the same battery? Assume the internal resistance of the battdm 7)6ovymf/q +/kjhfqtg; 8 :hew gc.ery is zero.

  96.16: When two resistors, having resistance R1 and R2, are conn7n6hy1 0qjs ofected in parallel, the equivalent resistance of the combination is 5Ω .h1j0 6n 7sfqyo Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω whrn7j8exc 53, 2rf vwd0 f88ztu qce6anen operating at 120 volts. What is the minimum amount of time that it woulwc8 xad6 cfz,8rr8 2e73q0ejtuvnn 5 fd take to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 3607 g/;(rcweyj(u5 ehik5l k ;zw lkj;b watts of powe; bh; l0(5jkrj k(eu;wek/g5z7iw ycl r?

  01.24: An electric heater draws 13 amperes of current when connected to 120 voxt 8;h zzktg*e8 gmk)em k*,v6lts. If the price of electricit gxt,kh* zvzmm8*t)ek ek6 g;8y 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 ligh-a0biozg9l:tuck47 tfea q* 6tbulb lit continuously for 1 y ztaol6 q0a:9uib c4et*gf k7-ear at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 1*k aauv6)gzy4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lightbulkv 6*zuya1)agb?

  01.10: Each member of a family of six owns a computq 2-in ckl/h91ix2esmer rated at 500 watts in a 120 V circuit. If all computers are plugged intsni 2h2/ m-x1eli9 ckqo 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 cdv 5jh-d.1 dkcfl pu*m38pzlxd79a (gonnected to four resistors to form a simple circuit as shown t1ju c dm.a5zl 3-gvkhdd fd9pp8x7*l(o 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 toj1gafm wuc,dp20 m),s form a simple circuit as smsj0),u 2wp1fma, gdchown 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,w;06hmuss uw.k5x5x j an ideal ammeter, a switch and three resistors are connected as sho5su;jwm.u 5w60xx ksh wn. With the switch 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 ei+q d)uz7f kshe1x,4 switch and three resistors are connected as shown. With the swi fe isd hu4z,q+kx7e1)tch 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, anp4 tu( d(j-nur ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammetepu(d 4rju-( ntr reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?

  12.14: For the circui9.su8z eqs;qx;xj6cx l vi,sdv1 u6b3t shown to the right, what is the equivalent resistance? Assume that all dqci3lu.;jse89 x6v; ss6zu ,v1b xqxwires are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent rebm*u r:k7k;u*u+r:u -mscm. 5 u xjo5fac p+busistance of the circuit shown to the right with resist ra:+.xr mc spmuuu:*ockj 5ub5-b;fuk7m*u+ances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected iguuipvokq a m3-7;. uwt/ eb9:n a combination series and parallel ciueo/vuig7 .mtw9; 3b- k uaqp:rcuit 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 combinat- 4mhunkn9.r vsbo ,;kion series and parallel circuits 4,nbhrnv;kk9uo- m . to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of t 2g7w xf4jv0yy04ft sbhe bulbs are identical. Which bulb will be the brigf4wvtf0s0y 7xj 4b 2yghtest?

  02.21: An ideal battery, an ideal ammeter, a switch and k2ztnz1r bvs5 q;r .ezb1rs07h be ,bi.r7y8zthree resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperesy.be05br2s,z btrs b;.znvih ek17q r 87r1zz.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery,yijqegx5nh:pg2 q - zt+9x)(f an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammj59hze q)pg2 -: tyfxin(+gqxeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal batteh2h3va n o) o;ki/lyl+j,q/ yrry, an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter rea;+ql3yh,vhr)/aj o knl i yo2/ds 2.0 amperes.
When the switch is closed, what would be the current in the circuit?