16.09: In the circuit shown, an electric current exists ic4g l3h ki0h(ic)3gb yn the metal resistor connected to the battery. Which one of the following c3k)3 hb0 ci 4yg(cighlhoices best describes 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 resistors are connected in parallel, the_________eachn b5*ps38s e t,*+cs8kyesoqh resis8,+n*s5s*hk yqsecbt3e8 p ostor is the same.

  06.33: A current through the thin filament wire ozu:p i3fwg9cgm w t6gg .;q-v:f a lightbulb causes the filament to becop.itq;:ugg9g-m:cvwfg w3z6 me white hot, while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with 8(-n vce6d pi:tmcr*mc9(b rqLEDs. LED is the acronn(t dqe9m8*6biv:r -( mccc prym for which one of the following choices?

  05.16: A cylindrical graphite resistor has length L and crb z.r +wm(xe a).+oaaxoss-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 1/2 .b+a azx x(or.mw+e)aL. 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 twic 00wf/ewz mpx;e the diametw/0 mpefwz; 0xer 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 h;xjh)yzu6 .f5synb g: as twice the diameter and half the length of wire X. If wire X has a resistance of R then wire Y would xb6u y .fjhg); n:5syzhave a resistance of

  03.23: A cylindrical resistor has length L and radius r. This p g,ct) jmhmk6)0g+)-pkfm2k p ukskz. iece of material is then drawn so that it is a cylinder with new lkj p.hmmkz)p gmufs-tk ))kg 0c62,k+ ength 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas6wgjzl x:a+2 h Edison wants to make a brighter light bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbuw+ xzgh6jal:2 lb produce more light at a given voltage?

  16.07: Three cylindrical resistors are made of the same material.nhy8kw /el/lg q,r2u ; The length and radius of each resistor k gy;ul//q2nr, l8 ewhis:
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 Rnxmy *s,j7zqr,t*.u t , are connected to a battery in the following way: “Two resistors are connected in series. This combt.j,7 nmuxs* z*rty,q ination 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 resistanc.+*-.jc;ofj d5 jxpxx rjreo :e 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeterdp j r xr+jecx;j.o5 xo.jf*:- reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the caa 2-r,n+jk b07 xgvnmweu:0 r(ddkj,ompound circuit shown to the right. The three bulbs 1, 2, and 3 - represented as resistors in the diag(w,a-bkd mnd,gv au:kr7e20 x+r n0j jram
- 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 q;7, 37fijwrl/dzs 0p j osmz,8q mko1circuit at the right. If the current in all three resistors is equal, which of tlqom0pj i8kd7 zss1; m/r7fq3 ,,jowzhe following statements must be true?

  99.37: The diagram at righ kfa:e2 0hbl,zhl 9pbvs;u)r 6t represents a simple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb r 0lb,hlupsb;96:z2)fa ek hv(or bulbs)
would you expect to be the brightest?

  00.03: Which of the iws,h:mb1g54ful caj7t6ir-qx k /0c following statements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are have equal resistak1j5qabcfl w hm/sgcr x4 ,0-6uiit:7nces?

  17.29: Two lightbulbq(p h1s2cd)h dq:j j; f:uxxd7s X andY are connected in series to a battery. Bulb X is brighter than bulb Y. Asx 1hhdud2q7)j(: :f qc ;pjsxdsume 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 coulombs will pass througx8:mtv.6f(h/zy oaueh the identified resistor in 5 seconds once the circuit was closedm6 eu/:f8h ao.vy( xtz?

  00.23: If all of the resistors in the followf fj hcu7/f,j61i 7,zancl 56npep6rming simple circuit have the same resistance, which would dissipate the gr6h, /f,5u cp jzn7mcnp71 6ljr ifef6aeatest power?

  98.34: In the accompanyingb khv002c6ptt circuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the power supply vh2k60bcp t0tvoltage V?

  97.27: Three resistors R 6i/xl4zp;cft pn(x *h(kmxh7 :3kbwo2 2udz x1, R2, and R3 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 voltage across R3kzixu42f7:23c;b*moxx(/zhtp xwd k p( 6lnh?

  99.40: Three different resistors R1, R2 andR3 ared 46 r0 ap/qsjs(+ruoo :xjo3n connected in parallel to a battery. Suppose R1 has 2V across it, R2 +:j(rrqnxo0odoa6 p 4ju s /s3= 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 volts. Wk9 0h:t; exyllhpx+l +hat is the maximum value of the current under theselkp 0;+:htlyel 9 x+xh conditions?

  99.23: What is the resistance of a 60 watt lightbulb designed to operate ssm i9)z/t202jqauex3h fo1d at 120 voltf3 0/sd)oq j2xatih2e m s91zus?

  03.09: How much current flows throp fo0n sv3q,7b(ry m)4gdzdayv2x20 d ugh a 4 ohm resistor that is dissipating 36 watts of powyd0,a)2m vs4q3gf ( xr0bdzo 2yvpd7ner?

  05.21: A household iron usee4**jhv, wvvpz:; x cl 0r/tepd to press clothes is marked "120 volt, 600 watt.” In ,:v*/ chzwlp;0vej rxt *4evp normal use, the current in it is

  01.05: Which of the following resistances could NOT be produced by a bhtz17eizj + ,w olo65circuit containing only three identical 6Ω resist6 71wt+5hezl oi,ojz bors?

  94.37: You are given three 1.0 Ω resistors. Which of the followin*;c+ iodnr b3ufpj- 6xb/1e2pe0w(c ia(n ufcg equivalent resistances CAi * icu(jn w3depb 1+a fpb-x2e0ucc(6rn/o;fNNOT be produced using all three resistors?

  02.06: Three resistors of different values can be connected toget(r,kje rw7 quqly29t7dh:f 2sher in different configurations. If all three sur9d:k7h ,qetlfqjr22 7(wyresistors are used in a circuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to ax nr *6h,0,tv/nxinib 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 inxn,b0inh 6 /ivnr, x*tternal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connected in parall7a5cirbjb x) (kev1r1el, the equivalent resistance of the combination is 5Ω . Which of the following stater1ajr)bk1e i xv7(b c5ments about the resistances is correct?

  02.46: A hotplate is designed such that it has a resistance of 12Ω when oph,ygrh 73x ucr/of-7berating at 120 volts. What is the minimum amount of ti7x,ug-c3 robr h /y7fhme 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 resistor that is dissipating 36 ztj( 5g;myzv8:ifl3 ywatts of powm5vg z8ti jyyf:3(lz;er?

  01.24: An electric heater draws 8ro66lu f1kbh4b,zjz 13 amperes of current when connected to 120 volts. If the price of electrici1u zorh ,8l66kb4jf zbty is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how much would it c ,:li/ djbyhvbs/;l8n ost to keep a 100W lightbulb lit continuously for 1 year at a b j/,lids;vnb h l:y/8rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbu4h et1eyktw-5pyl b ,;zww9 j8lb results in a power of 24.0 W associated with the bulb. Which one of the following choices be9;bye wzjp1 e -4ytht,kwl85wst represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computtzt- 2 68botcjkd; ujzj)x1, 8el yb5yer 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 the maximum number of the computers can be operating kct5 l88yut dx,ej12ob zjb)y ;t-z6jat the sametime?

  03.16: A 9-volt battery is connected to four zv x4:9vpunnslg5l;q7 4antqz5: dh / resistors to form a simple circuit as shown:gsvxz5 5;nl:4nnp/hz 4 dq7u9lqat v 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 connect +ejo4 j(9ed5j )jplk-wjs )wded to four resistors to form a simple circuit as sho5w-dj jp w)je9d+ jj)e4lk(sown 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 aibe*8nv buq-qs* .t 0vre connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.q0uv*vi. 8q-bbe*s nt
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ch6em e +.n;q b7hcv9rammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter cq c.9rveh+h7 ebm;n6reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an5x ,x5 4tmpxoce,ds8 u ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in t,sc5ox4etp ,8ux5mx d he 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 righ*n- vpeu 16gfut, what is the equivalent resistance? Assume that all wires are ideal, the battery has no internal resistance, and all thref 6pg1vnu-*uee resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit s8ix:vxx7e,b a u+4 ioxhown to the right with resistaxeu+ :xixbo,v7x 4i8 ances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram belv 0 tq(bkh:jdf26a vg+ -zo;d8jo7 ifiow shows five identical resistors connected in a combination qio0kh6 tdi vo 8a-g+df bf2vj7:z(j ;series and parallel circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below sho8+bc n(i 4uem -;grwefws five identical resistors connected in a combination series and parallel cir4rm-we c e(ubng+f;i8cuit 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 identical. Wh y3 ka5loi6jgw0k79 i1rky4fhich bulb wilg0hkyk96 3a i5wi olf71 j4kryl be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three resistors are 7jax2)j0 p o/p ttz8+esk+yix connected as shown. With the switch open as shox0ks+p7ajz/t8ytp +o xe2 )ji wn 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 three resigx y-+8lsj qx73p- g-etteg8 vstors are connected as shown. With the switch open as spx e ge+vjx-8gyl --q3tt 87sghown 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 ammeterm o3abwtu e9 f07:au6m, a switch and three resistors are connected as shown. With the switch open as shown in them0 ob3wf 9:t7em 6uuaa diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?