16.09: In the circuit shown, an electric current exists in4 /modne95 ocwrrkq* 9 the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through the resistor and the direction of *doqr wc9/emn95r4ok the electric field through the interior of the resistor?

  98.06: When any four resistors are p+3bvm8.s ) qsf.xtolconnected in parallel, the_________each resistor is the x p bom+.sftls)3 8.vqsame.

  06.33: A current through the thin filament wire of a lightgf ah.8p:xug9 bulb causes the filament to become white hot, while the larger wir8g.px: ghf 9aues connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replc8c cak o)5;pdaced with LEDs. LED is the acronym for cadcpkoc8); 5which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross(lg-xaq3 0 mpla ri(d,-sectional area A. It is to be placed into a circuit, but it firsdl0gr3,qlxi( p am-(at 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 0 cazs39/ylysthe same material. Wire II has twice the diame3lc9y/ 0zay sster and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same m jwuwzmt7 6*fse -59xsaterial but has twice the diameter and half the length of wire X. If wire X has a resistance of R tw*us6t97 5 jwesfm -xzhen wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. Thion3iu06imb 9s s 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 proceb3msn iou906 iss?

  07.27: A junior Thomas Edison wants to make a brighteye4 fb1bk16vmyi jv (3r light bulb. He decides to modify the filament. How should the filament of 46vymvie fb kybj311(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 mas2 e3n4seeoqnm :7 ss-terial. The length and radius of each 7e4o3se sm2ne sqsn:-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 connected to a bj/mk 6 7kc:u6ozhzo t;attery 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 resistorz ;:utk6m hckoo7 6jz/.” What is the equivalent resistance of this arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuibld9dnm-44xd o:0 i rct diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The am9x: omricb4dd- 4n0ldmeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit sh)+wd wq/ ze3m/w;b 9(nsw7iaijo/:ekmyw .mt own to the right. The three bulbs 1, 2, and 3 - represented as rdi3wmw/izq(t /j b)7e.: kmwwm /e+;snyow9aesistors 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 0 omqj94/v tqyright. If the current in all three resistors is equal, which of the following statements must otj0 m9y/4qvq be true?

  99.37: The diagram at right r nbr+p+mn3r*pepresents a simple electric circuit composed of 5 identic b+n3p*nrm+ pral light bulbs and 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 simple wu;3m+rm1, 2uhk mvd- cn4ozlcircuit shown where resistors R1, R2 and R3 are have hmdm l4k1row2,m ;3+vun u -czequal resistances?

  17.29: Two lightbulbs X andY are connected 3p. /dci/ac-tfql *ce( pbuyy:1rd.w 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 other to the sameqyfd /.1.* wuai3rpbde:pcy ( /clc-t battery, which one of the following choices best represents what is observed?

  06.34: How many coulombs will pass through the identified resistor in2ip- w*2im2nz ftt5h/g lj)ig 5 shn mifj 52 igw*pt/ zg-li2t)2econds once the circuit was closed?

  00.23: If all of the resistors in the following 0gb.a gr.yiv 6)6ob tdse, ib8simple circuit have the samra) 0b,et8g.6 vb6bogi.dsyie resistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current tk 1my 8jtoy0l qy*0lx/hrough the 6.0 Ω resistor is 1.0 A. What 1*t0 ljmqy k0l8/ oyyxis the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 ac7a 7yff9 l4qnc0ld 3ure 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 thecfl79d0a 4q7fnc3l uy voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to a ba5j. g+4 ry6r4mjrj yslid5 pd(ttery. Supposer( lj 5dg4r+4.6ipr 5mdsyy jj R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coila :9yws sazv5- is rated 1200 watts and 120 volts. What is the maximum value of the current under these cond vsa9-ayzw5:sitions?

  99.23: What is the resistance of a 60 watt lighbh)iq4 )+aq qgtbulb designed to operate at 120 volt ghq))aq4+biq s?

  03.09: How much current flows through a 4 ohm resistor that (k6 :o9 51hd9dhavuqa:qoq o(yffe;l is dissipating 36 wa eh aq;foqkd9u o6f(vl:dy(195 qo:ahtts of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 wah5 5m+ylu9icott.” In normal use, the current in it i5oy+i 9u5lchms

  01.05: Which of the following resistanpnut /f*fht:3ces could NOT be produced by a circuit containing only three identical 6Ω re3pfn* ftuh /:tsistors?

  94.37: You are given three 1.0 Ω r:09i r p*cuq-uon3fyf /,2id )gpgxf resistors. Which of the following equivalent resistancen2icfoux/rq g:dr f03pg-y* pf,9i)u s CANNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected together in dif6kta4b.rap :fy 4qticr8z2(h ferent conf.tr:zyairfb kt(2ap6 h4q4 c8 igurations. 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 connected to a battery,z5coeh 5h,c,e a total power P is dissipated in the circuit. How much total power is dissipated in,zc, h coe5h5e a circuit 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 resistanj6bz 8n /x. ,:tkimwmzce R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the reik z8jztm/w,6x: b. nmsistances is correct?

  02.46: A hotplate is designed such that it hava+0ha s:l*adsyivu+i0gi x7 ( 5n 5rns a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 isi5+ i50a7 lda* yungx:0vs +vnhr(akg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that i:789l eqnui6tt .x70xw uxcows dissipating 36 watts of power9i06nlwu8 x 77tot ux:q.wecx?

  01.24: An electric heater draws 13 amperes of current when connected to 120 vo84:rc rrx wbe4lts. If the price of electriciw rr4ce:b 4xr8ty is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how mzff +0otdhs 96uch would it cost to keep a 100W lightbulb lit continuouslff9z0d t+h6so y for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant currxox(1 j5mdkq-)i+w izent of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Whqdjo xim5(z + 1w)xk-iich 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 at 51q pbpa r9j3eyd4 ds7i/x1 dp800 watts in a 120 V circuit. If all computers are plugged into a single circuit proteyjbiqdpa/79rpe 41ps8 d d 13xcted 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 d9 r4s)y4 za+j;htuzrfour resistors to form a simple circuit as shown to the ri4a ;z)+y49htsu djrzrght.
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 formwxt2 b;c0k v5t a simple circuit as shown to the rkt x ;v0bw5c2tight.
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 swi kc(di-kdkr a6prz zgqe-95+ )tch and three resistors are connected as shown. With the switch open as shown in th (6-+q kd igz-9e rk5r)dckpzae 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 switcb0t+3w73rtuw6 )nbp rs8pp0: b vce wmh and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amper)+83ew6v: bwp nmwrspc07up bt3 trb0es.
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 resistorom . ,;iy8ofuhs are connected as shown. With the switch open as shown in the diagram the ammeter 8ufoh.i;y om ,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 r0eong cwsud/pr ;+p2sxo1 -8the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors-se/wrg8r xp+c; o ous1p2n0d have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with :u6 j8k y0csky resistance yjysu0: k8c6ks $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in a combinat .d+ntxuw5( ssi y*qe3ion(*d 3wt+usix n e.5syq series 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 resistors connermk. 6*ye.or80itx: /td b,pb t vw2lkcted in a combination series and paralletr80tm,kr:2ove *bpwld6.yk /. b ix tl circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the jx .kw2efff y+0/syx( qr5m:sbulbs are identical. Which bulb will be the brightest?f+kr fm:xy/sfx ej5w0 q. ys(2

  02.21: An ideal battery, an ideal ammeter, a switch and tp)r1vd5 n;+sb wehoiy 7zn7j+ hree resistors are connected as shown. With the switch open as shown in the dv7ynrwzbo njhi;+s75+e d1 ) piagram 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 switch and three resistors are co;a,xm7llf- lb;2pmwfz2q y05)o ,zh k-azebpnnected as shown. With the switch open as shown in the diagram the ammeter read )h-5;a mf,bbko0a;2-f7lmz ,epx2wzqllz pys 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 are conmlttyx 1y*rox; 8z qb:1qm44f nected as shown. With the switch open as shown iqoqx ftbm8x ytzy m4*141 :r;ln the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?