16.09: In the circuit shown, an eletv2l+u.0i72 b aioms:/ gk wa;jw afu1ctric current exists in the metal resistor connected to the battery. Which one of the following choices best describes th j 1:vuu +omktl0 ;ws.ba2/g 7ai2iawfe 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 resistors are connected in parallqm* ,lyapi t1:sp 5cfnof9)d )el, the_________each resistor is thel:cn*fiqd1op)msy 59)fp , a t same.

  06.33: A current through the thin filament wire of a lightbulb causes the filamefxzphot8+ l:j:/ u 7rxnt to become white hot, while the larger wires connected to the lightbulb remain much cooler. This :7xp+8:lhjtf/ uor zxhappens because

  13.08: Some standard household lights are being replac*nvc (ok2*l3qul kt4fvu/e r* ed with LEDs. LED is the acronym fotfr*k*3ke*v4quuo / lc(vnl 2r which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and c+y-k+bi tcmn* ross-sectional area A. It is to be placed into a circuit, but it fn*bitc -+m+ kyirst 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 qocby .v.-bd2h + (etjtwice the diamete-e+c.jbqhd .o vyt2b (r 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 r.m6ytpvp ;ucsdh7ufn9qb ow7oq 3qs 8j;/68half the length of wire X. If wire 7spcds/tfr opqo89y uq8nb 3;hq v. 66u; 7jmwX has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius fk1ox+ h*,4hmuxr j-6e wdg)g r. This piece of material is then drawn so that it is a cylinder with new length 2L. What h hgxhxju+mg k 1)dr-*, 6of4weappens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. + bh6( ckk8d j,osm7jlHe decides to modify the filams8kd ( mk+h6bol,cjj7 ent. How should the filament of 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 material. The lebr gmo6d34* ym/h*bgnngth and ra6 d/ n*ogrmmh* b3gby4dius 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 ogbp jk wz g*j):x7/wm8)wr(vzf resistance R, are connected to a battery in the following way: “Two resistors are connez(*w7 mrkw)xg/w zgbjvp )8:jcted 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 circuit diagram has internal r8 :t)tydg4h ,krgdgdvw9.y , zesistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmete)wh48, kydd gvtg,z .9 rdyg:tr reading is most nearly:

  97.37: Consider the compound circw)y-t7 r9nfpf uit shown to the right. The three bulbs 1, 2, and 3 - represented as resiw t79ff)yr- pnstors 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 0tw:lfrl55kw the right. If the current in all thre wkr:5 5w0fllte resistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed of 5 im;yjd c2q.sk;,o9j0 sex6c t ydentical light bulbs and 2 flashlight cells. Which e60dmotckcy.2, ;; jq yssxj9 bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning sgj 8+7;*uvqy cbvw8b;p i:jcthe simple circuit shown wherei*8vyc; w;7u+gsb:qc j8bp jv resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb y vuie51844 vymugt/b X is brighter than bul5t 48g 1vivemuyy4u/b b 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 represents what is observed?

  06.34: How many couli1u 1 g1fqbnrp3o06-;4 o vi mqn1;.xxvncsnb ombs will pass through the identified resistor in 5 seconds once the circuit was clos13ci;qu1n nnqoobn6 bs.-14 igr0 v fv1;mxxp ed?

  00.23: If all of the refbh67r)yk7h)/j 2 yqn cuj5ye sistors in the following simple circuit have the same resistance, which wouluy jjc/r bhhyn7ey)f qk) 7265d dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the curl83ln;vkl+p eg+ (x jkd 4cg3vrent through the 6.0 Ω resis+ (+k34v ljnxged cgl ;kpv8l3tor is 1.0 A. What is the power supply voltage V?

  97.27: Three resistors R1, R2, and R3 are conx6)oefj w7e;21c5rr2fnj r rnnected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistance of 3.0Ω, and R3fxcn5rf1rrw76n ;2or e 2 ej)j dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, R2 andR3 are connected in parallel to n0 9g)b4 deijaa battery. Suppose R1 has 2V04ea9 igjb)nd 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. ebg//niz1oz z(9 /qqb What is the maximum value of the current gqz/ i/ /b bzozn(1q9eunder these conditions?

  99.23: What is the resistance on+wv m5av5 l(m 6+ ,vrace/stgf a 60 watt lightbulb designed to operate at 120 volts?l c,5n5(mmrv s / eva+vgaw6t+

  03.09: How much currentd cwux- s*8+:sbpv.za flows through a 4 ohm resistor that is dissipating 36 wa*dwus.c pz+-b:as8xvtts of power?

  05.21: A household iron used to press clothes is marked "120 volt, 600 watt.” Iaf y.jq c 42ox)anxx)7n n.)ja xx7 ao)q4fy2xc normal use, the current in it is

  01.05: Which of the f.rg dmp(dv 6g9ollowing resistances could NOT be produced by a circuit containing only three identical 6Ω resistop.dg9rv (mdg6 rs?

  94.37: You are given thre(vcotc gm4t l/04xk l8 aahs6;lizi77e 1.0 Ω resistors. Which of the following equivalent resistances CANNOT be produced using all threzs7lii 7t;6go c/ k04ala84clvmhx(t e resistors?

  02.06: Three resistors of different values can be connected together in differe*y:wmd3c (ft m8fuza 6nt configurations.cf8dfyz3ua*:t( mw m6 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, a tofw-pm tth,ra7 r6+s5ctal 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 resistw5h7 r t,arc 6f-msp+tance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connected in ki22 vasuxwm)mo 3w klx*2a2/parallel, the equivalent resistance of the combination is 5Ω . Which oflwokask x 2iu am2/2wvx 3)2m* the following statements about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistanceltq5qdr61toz 4s g0d+a) 3ktj of 12Ω when operating at 120 volts. What is the minimum amount o1d) kt0gst5zjtqo r q4 d3l6+af 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 apxje4 p,fc4lyl8,) uc 4 ohm resistor that is dissipating 36 watts ,epfpxly j484 )lc,u cof power?

  01.24: An electric heatho9yy8g rh 082td kh*obrw.ju 0jgpr-4nv(n: er draws 13 amperes of current when connected to 120 volts. If the price of electricitw-0u 8n ykg9r 0(to.d*hy :grojnr8j4v p2hhby is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately cc aanteu ss )gq luh3g( )ta.d,0051show much would it cost to keep a 100W lightbulb lit continuously for 1 year at h cg 0 s3q))c5.an( t,1etlauussdag 0a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A t7v z;8eo9cqu)wkfxwvl3(c g.hrough a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following cho ex.(7o3 wcvfc u;wq9lzgk v)8ices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 iu pap45i)3gkw/ 7fno :f 1snzwatts in a 12p1)wg 37/:naf snfopuiz ki4 50 V circuit. 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 conb80.t4pls;bxw fxg)xnected to four resistors to form a simple circuit as shown to the right. s)8;xw0fgpb xx l.bt4
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:h,et5pp3( +hjwuo g x to form a simple circuit as shown hjuh pw pg,x+: (3o5teto 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 3kk+o to6vt) ithree resistors are connected as shown. With the switch open asvt)3 k o+i6otk 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 an6ev i.uvqbn* 3d three resistors are connected as shown. With the switch open as shown in the diagram the ammeter readsq6vn.3bu* vei 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 switc7( -l8 vowfj1z6joj5agmfb .y6s :ovuh and three resistors are connected as shown. With the switch open as shown in the diagram the ammsaj ful(-vo1o go:6wb6f.j 7v8yzj5meter 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, he70bcj: otj yj5/ uq,what is the equivalent resistance? Assume that all wires are ideal, the battery hash btu e7:,/oqjyj0 cj5 no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown t -hmuk 84(tdsto the right with resista4t - mk8(shtudnces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors cs),0 ;vs th3u+ x)z oxix3hcmxx wmu42onnected in a combination series an,3m) sv)c3uxx 0xxx ts;4mhh2+io wzud 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 connected in a combigfj)cr0m ;akp9 3fb(3t+xebznation serifa b)jgc3ft;b0p ze(m krx39 +es 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 bulbu.w)pb0eyz0 1 l.6r ynwvbue :s are identical. Which bulb)u1.e 6y b0rlb vy:uwwpn.z0e will be the brightest?

  02.21: An ideal battery, an ideal ammeter, d:o7l : q;xlmsa switch and three resistors are connected as shown. With the switch op;lx: q:ms7od len 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 and threv u v0ed;9wcw7e resistors are connected w0vd7evc;w 9uas shown. 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 switch and three *yfuxk 6-1qd kt-styx7f ) 0 qj7ld0odresistors are connected as shown.)t7to 0 fyddl-fuxxk7*0k 1-qq6syjd With 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?