16.09: In the circuit shown, an electric current exists in the metal rese/)my1ft xsk t t*v0,bistor connected to the battery. 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 *vk /ettmx0b y1sft) ,interior of the resistor?

  98.06: When any four resistors are connected in parallel, the_s5 :edh:sly:o whf ys5,) am,u________each resistor is the same)f:uh5:wldy :o 5 ssays, he,m.

  06.33: A current thro2xh gf,joe f-9u8naf3ugh the thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires connected to the lightbulb remain much cooler.9e, -f8n3g2u jaxffoh This happens because

  13.08: Some standard household lights are being60:eul:cwya g replaced with LEDs. LED is the acronymlecagw: 0:u6y for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sectiotacu;+3tasm-c1d r k4nal area A. It is to be placed into a circuit, but it first must be cut in half so that the newsat3;-cd 14km+ rtuca 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 hvbrw6zczx d 64ymm4 2;as twice the d6zrd 4m6bcxwvym;4 z2iameter and twice the length of I. If I has resistance R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter and half pr;du1,geb:de orv+ i rc(6 qd+gm0/ dthe length of wire X. Ifd;g d0mdp(ru/ir,b1 +ogv 6qecd+:re 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 r. This piece of materiae.7vbk jo fb26met0s2l is then drawn so that it is a cylinder with new length 2L0 7ebeb2s. okft 2m6jv. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison u/ng2j t9oz9qwants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in orde2nu/9j q9tg zor to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made ofp3xnwt( 5dp.,ran 2lz the same material. The length and radius of each resistor is:n,5 2 t3 ra.pnzwldxp(
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 battery in thez unn*w 6lcm9 tr/t; /n(du6ff followifw mt n/ und96l6fn*rcz(/;utng 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 arrangement of four resistors?

  95.35: The voltmeter in the accompanying circuitsq*n y yu-5 l0yp66 sa)uq(cvp diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The amme(5puqupyl6 nc-vs 6a y0q)sy* ter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs ,f ziep*yr*8lz/e3t b1, 2, and 3 - represented as resistors in the diagryz ei fb8t*l/p *3zr,eam
- 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 tz8(6a 7ow wizfa-0 nrahe right. If the current in all three resistors is equal, which of the followi0iaazrw 7- ( afzno6w8ng statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed of 5 7 wq)im 9i88w n:pyiq5l pvsn*identical light bulbs and 2 wi*w5miil :9 8snyq v7p)8pnq flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statemenj5q6;vg;r vkwts is NOT true concerning the simple circuv v; ;gjr5kwq6it shown where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andivbwgx).,p6q7y h e*xY 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 connected in parallel with each other to the same battery, which one of the following choices best represen. g76iew*xy bxp, hq)vts what is observed?

  06.34: How many coulombs will pass through yf72 jii2fsix rr/ 54q the identified resistor in 5 secondsx27f/4i5j f2r siryqi once the circuit was closed?

  00.23: If all of the resistors in the follow*z0ib. ht1f kk(3zwlt1m,off ing simple circuit have the same resistance, h*3ot 0kl iz,(zbkf. 1ff1m wtwhich would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through the 6. 5xn .h4,hoz4ddr 30wo,oe2a yf-u gyj0 Ω resistor is 1.0 A.03ozoaewn44d-h2j , rdy yg5xh ufo,. What is the power supply voltage V?

  97.27: Three resistocgu -78n2de :o jpjnk-u xxg1e/q+. rhrs R1, R2, and R3 are connected in series to a battery. Suppose R1 carries a current /rcku:q1e7 g .n2-x xgejjonpu8d h+- 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 are connected in paral9.lxstdt7c8 h3ku-l/bb8jf2vol - lalel to a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipates 6 W. What is the current tb2f hk t.- ljulosdalv9/-cl8x7b83in R3?

  99.13: A heating coil i w0nt28jyi9k uk idc38zqh t2;s rated 1200 watts and 120 volts. What is the maximum value of tt9k tjzn;kihq3 ycu80d28 w2ihe current under these conditions?

  99.23: What is the resistance of a 60 watt )3gzlw;,x1-u ozl x zulightbulb designed to operate at 120 voltuz z,zl;w13)ox u glx-s?

  03.09: How much current flows through a 4 ohm resistor that is dissi sr9+g8lfvnix.zb e1t(ljqd4 r h*z:(pating 36 watts ( z.zs:hr gbq vf*1 ed+i84(l9jltx rnof power?

  05.21: A household iron used to press clothes is marked "120 voltibf03)sxhwxh8i*p 4h , 600 watt.” In normal use, the current in it iphh0 i3x8 bixhw4* )sfs

  01.05: Which of the following resisdqird rz: nbdwwo)ev0vhi1 9(3)9e) s tances could NOT be produced by a circuit containing o9hrvv3o(qir z)e )w:d9 wd0)s1bdn ei nly three identical 6Ω resistors?

  94.37: You are given three 1.05aiu4 mxqo8:o Ω resistors. Which of the following equivalent resistances CANNOT be produced usio5aqm:o iu8x4 ng all three resistors?

  02.06: Three resistors of different values can be connected together in differenqw(rgh sz6*;w t configurations. If all threehr (*6wzgw;q s 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, a total po nvu s*h+xz*1fis1e 2iwer P is dissipated in the circuit. How much total power is dissipated in a circuit if n identicas1ifhx *1 s*2 iu+nevzl 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 her**y i a;pvxa14 voa:z8pu. connected in parallel, t 8 :vu1yaha p4 xi*.avoz*rp;ehe equivalent resistance of the combination is 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistanced x:t; ebqp0 /s8)lf vz6hau gv8a 5b(zxyl8f) of 12Ω when operating at 120 volts. What is the minimum amouga;e/8 58(lzh 8f) szxbfyv6d )a xvlb:q tp0unt 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 flows through a 4 ohm resish 2p1m(c i9l1 fh)ckystor that is dissipating 36 watts of power?f1smk ch)ch2i9 y (pl1

  01.24: An electric heater v a78 w,/sr2nn-mhqjsdraws 13 amperes of current when connected to 120 volts. If the price of electricity is w- r,q27ms/js8an hn v$0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would it cost topwj.:s6o3 /to fdxb .o keep a 100W lightbulb lit continuously for 1 year /os ox:.3 twdf 6.pojbat a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00cs:xohc kbh6a/ 7z2a/ .ay( dq 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 lightbulb?zboydq ka7a(:ca .h6s/ 2hcx/

  01.10: Each member of a family of six owri9xrm 3ei(j44(j9 yjvsc fuf, r5o6tns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is th3(truj ffc9x,9sy 6or4 i4 (ejmirvj5e maximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to formqa yt3;t c: q1 i)vbj;3 em9pa3pn1qpn a simple circuit t3cm1)93ppv;:yqe aaj 1b ;ti nqqp3nas 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 fouw n 6 cj)41qz.f.3xfv+ c4mgvkk1iwj i; /qffmr resistors to form a simple circuit as shfq wk i fi4.zx116n+34cgmfj; cmq)wf/vk vj. own 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, xhy67hv(romjdsv ;-0md .le0an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the d .jd0( v70 d-xhome;v6srhymliagram 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 batterye;/ mg2p,jd (vs ezts-, an ideal ammeter, a switch and three resistors are connected as shown. With d2 j-ge (,st ;szemv/pthe 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 resisto tkudc-l6ygvp 9u- i)/rs are connected as shown. With the switch open as shown in the diagram the ammeter read/cdpltv u--y )6ik9g us 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, whath /l*ms)um9 ofxtu4* f is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all three resistors have i*h ut 49)fx/mlu* sfomdentical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right o* bef2hd-/dfwith resistanc-e/doh2b fd*f es $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows fivdl2smo n8wy.9q +6nh0o/wzr5dg2jdu e identical resistors connected in a combination series and parallel circuit dnh6w90/m5zg s+.d 8o2jlr2udnoy q wto a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows fisi7kx//d5b e (wclf l-ve identical resistors connected in a combination /fi5l- lwc(edsk7b/x series 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 7x9nf 6 ijafcmoa)yzo6 9ml38 identical. Which bulb will b3f6omy alz 7 9jcnax98i6 o)mfe the brightest?

  02.21: An ideal battery, an ideal ammeter, eco u 3c5t +v0cfr9*nna switch and three resistors are connected as shown. With tc0+9fno vu*tc3n5cer he 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 switch +it88lykzz/4 h d)54ftugthj and three resistors are connected as shown. With the s8t l45zh thky8t/4i) fzg dj+uwitch 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 au:f6) 8qzzispcl 2yx/ mjs6.r re connected as shown. With /6.z26) jf ypu8i:lrcssmxq zthe 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?