16.09: In the circuit shown,ozntfu/7hoyf *0cxr/1i(; kjl4ws *y an electric current exists in the metal resistor connected to the battery. Which one of the following choices best descry0h*ycl(7;f/io/ r jo t*n 1xszkfw4uibes the 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 kaitc):s3w,qoh ;d 7kns8x5 jresistors are connected in parallel, the_________each resistor is thetx qkdi8 h7,c wssn;oja): 5k3 same.

  06.33: A current through the thin filament wire of vd4)45ab:0vuihrl tvc r:mx(a lightbulb causes the filament to become white hot, while the larger wires connected to the lighvt: )ri x5mr4v (cv4hubdl0a:tbulb remain much cooler. This happens because

  13.08: Some standard household lights arw9i; h tzokv 9ou-d(l0e being replaced with LEDs. LED is the acronyt -9kiozou0hv(wl9 ;dm for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and cross-sd ;df*z;g8q 2wlfy))e jfiwf5ectional area A. It is to be placed into a circuit, but it first must be cut in half so that the new length is 1/2 L. What is the ratio of the new resistivity to the old resistivity of the cylin8wff;yqf2dd; le*w g5f) )jizdrical resistor?

  98.20: Wire I and wire II areh1cyk :p0vvj s6q+f7d made of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, v7j01p sy+:6ckhdvqf II has resistance

  99.31: Wire Y is made of the same material but has twice the diamete) 4spsyfo0g5ina)l5y r and half the length of wire X. If wire X has a resistance of R then wire Y aiy 4o pgfsnl) 5)y0s5would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. Thisxj46bd0 yin56 3jlqiz piece of material is then drawn so that it is a cylinder with new length 2L. What happens to the resistjii 6nlyxqb zj5d30 64ance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb.vyy*orrwi :yrp*486bm+bmbhqi6 c* 1 He decides to modify the filament. How should the filament of a lightb+cbiry1wr 6q8py*m:6v mir *4*b ob hyulb 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 0 a/+b 6cw8.o2mens5pdyhjx vlength and radius / 6nb0x5ya+ vmc8ehdsopw.2 j 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 of resistance w022fnok ogj(R, are connected to a battery in the followinfn2o2(ojw 0 gkg 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 tdmil 2 nrr5imz zm77b07.*fz.1u sasj:cg *fmhe accompanying 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 vozs5mgnz*i s 7 rcf71m j:7*fi.drz2 lmmu0.baltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The th1.q* os zldhddsj8,g ; q wc3-ovo7/zxree bulbs 1, 2, and 3 - represented as resistorsd d l o1,zow/s3*c -.7zhxdsgq;oq v8j 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 right. If the current in al3 lfxuocu**r 3tq7c/ js7ve0ul x8f/sl three resistors is 7u oe3t*u c vrf*8fx7s0u/3xs/qclljequal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric xp-7fea e z.e,az(4fehyn )ig9a7h* ucircuit composed of 5 identical li7 *- .x9eg4ne(zhu7p)a f,zafheeayi ght 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 concerningw08gi)a z* -x2gct bqo the simple circuit showwtq02 ig*xo8ab -gcz) n where resistors R1, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X v +q32ljk8.sm m1woy s m(sx2uis 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 represents ww3lo 8kq sms22mm 1(xu.s+yv jhat is observed?

  06.34: How many coulombs will passjby5ev,x4 kzeoy.c:v h49w l 9 through the identified resistor in 5 se byv.e x,994j54ezchwkoy l: vconds once the circuit was closed?

  00.23: If all of the resistors in the following simple cirsibkr uaca 6g++rf1.1 cuit have the same resistance, which would di +1ka r+sbri6c fagu.1ssipate the greatest power?

  98.34: In the accompanying circuit diagram, the current through th5 ecx1mr8x)/ mo 7;wid smut:be 6.0 Ω resistor is 1.0 A. What is the power suppl 7bt5m x/i;doxm1e)mru8 wsc: y voltage V?

  97.27: Three resistors R1, R2, and R3 are p:qxg1 42xdw hconnected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a rewp2: q1dxhgx4 sistance 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 parallel )s8,je045 7m8cw ;o5isaimdxhxzo/ en 0okvcto a battery. Suppose R1 has 2V zxox8e5eksivwm0 hod/ac cs ,8o7m;0i) n 45jacross 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. What is th-ww40az4toc-qb uj6 se maximum value of the current under theas- qt 40u-6owwcz jb4se conditions?

  99.23: What is the resistance of a 60 watt-gpqrt sn 3iqos 97+e+ lightbulb designed to operate at 120 voltstq nipso37+-q+s9 gre?

  03.09: How much currentip- uomtk8 ; -kysvl56 flows through a 4 ohm resistor that is dissipating 36 watts of pmi-pls;- k 8t5vy6oukower?

  05.21: A household iron used to pret vp v c4bv1q(u)5t/jyss clothes is marked "120 volt, 600 watt.” In normal use, the cur()ctu q tvv/vj b1py45rent in it is

  01.05: Which of the follof 1wpeng,5 ek ypflz-6gr1t o( 9-)dgowing resistances could NOT be produced by a circuit containing only three identical 6Ω ro9gf peowne-d6(t gkfl,)yrg 1 zp 51-esistors?

  94.37: You are given three 1.0/l. potqmvu9sc5udvk*ug2p e 3q8o a *zoi,04 Ω resistors. Which of the following equivalent resistances CANNOT be produced using all three resistors?2ve o s48,ouup mk0idt upal95c *qzvq*3.og/

  02.06: Three resistoflv4o ky9iz1dd4k3. 8w4g qp4iob yi(rs of different values can be connected together in different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be1 4i(k 8 f49kdivo34zpdygib4qlyw .o produced?

  97.35: When a single resistor is connected to a battery, l1 c h+l.qbz7/xmzhs3a total power P is dissipated in the circuit. How much total power is dissipated in a cir1+x3qhz7 czmb ./hlslcuit 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 resistanq xdw(4: hkho7 d-s*zhb4v fx0b hqs:,ce R1 and R2, are connected in parallel, the equivalent resistance of the combination ibhd 4-04osqdh h k:7,vxz f: x(bwshq*s 5Ω . Which of the following statements about the resistances is correct?

  02.46: A hotplate is designed such that i ( swyv i3x5y/5 /biiyyowf)j6(kkbj- t has a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would take to warm 0.45 kv)6 o53xf/yww5y jb (yb kisi i(/jk-yg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resistor that is dissipating 36 wa x(n*lqte95datt9qtnal*5ex d( s of power?

  01.24: An electric heater drawbux .uhpvu6 +7t p y.(to*+t..evrhams 13 amperes of current when connected to 120 volts. It6.*hur+v p+xu . heavt.b .7my o(putf the price of electricity 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 cgu z m.*7-hn(sjgfc/tbulb lit continuously for 1 year at ajncg*c -7(m/hg fzu.s rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb results in nuy p* 8 gwun4:7b*z,vwia*i za power of 24.0 W associated with the bulb. Which one of the following choices best represents th,bzw u ziupny4ig : 8n*v7a*w*e resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated at 500 wattarqz44ot-, fl/yqq xd kh x**4s in a 120 V circuit. If all computers are plugged into a single circuit protected by a 2/k4*xqqq4hz o ytd,arx*4 f-l0 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 four resistors to form a simple l gk: *28xznxc8aq,v scircuit as s:zq8nk*8 ,g lxcx2vashown 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 to form a siv1 yn0byss8a gh0 f hc4u;1su7art,a;mple circuit 4c0aahhuv8b10 s;n 7f utyy s,ars1;g as 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 resistors 7 z 3 qbe-nrnrifs s*9ng6g+w)are connecte)wn9r-nq6z73 rg s ieb+sn *gfd as shown. 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,loi n87wzd nl,7cpp:: an ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown wcid8on, z7lp pnl:7 :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 tdb3p5 uv:v ruqr,z7l z66m5bbhree resistors are connected as shown. With the switch op 65p l7zr3rvuub,dq:zm 5b6bv en 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 right, what is the equiva phb 6nbjsbms(9 .jmc/.3 iiuv5/s0o flent resistance? Assume that all wires are ideal, the battery has no internnobf6 0.9/35/m cjj(hvbmisps us.i bal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circr9)2 qes3 0i km;8jegqrok8s9dq ow)c uit shown to the right with resistan)ojq9d 8 s)qk;2 kew80ircqogsr 93meces $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows fiveya+ fm6dl oy9tlr49 0 loq0pm1 identical resistors connected in a combination series a yto1 lloa0 9mq 0d+ylp9fr4m6nd 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 c6 ctef( k9z3osonnected in a combination series and parallel circuit to aesf9t 6kocz3( voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, u.rx4fv jdqkx-z6)2 q all of the bulbs are identical. Which bulb will be . zrf-)6 kqxdjxu42vqthe brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are con8x.y +8n bo9k5lhg+ozb0pt snnected as shown. Witn+08log8.zsytpbk+noh b x59 h 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 switch ant8 vhi4+zcx)b fpfy0;e/wi 4xd three resistors are connecte ic0fpi ht8vxfybw+x;4ze/4) d as 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 resistoiej:t 5y-h*7p /j g-wdz9gfc nrs are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 ampere5 7 p-t/c*z9 :jhfdiny-gewgjs.
When the switch is closed, what would be the current in the circuit?