16.09: In the circuit shown, an electric current exists in the metal resistouzvn:u 1c32pfjsz09 jr 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 interior of the resi9ucn2v zsj03pz ufj 1:stor?

  98.06: When any four resistors are connected in parallel, the_________ecvw n0o-vx6eh +f/b1 gach resistbhge+ o x 0vc6nwfv1/-or is the same.

  06.33: A current througctyx25ze, z(az s+;d03r cspxh the thin filament wire of a lightbulb causes the filament to become white hot, while the larger wires conne53s0(xcerpzzc ; ys ,at2 zdx+cted to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced wite*5 6pcb)ek; noh:08mmd;uyvbns 6h wh LEDs. LED is the acronym for which one of the folloh;: 0 )bc5v6ne;yopmd *kh8sum6 wenbwing choices?

  05.16: A cylindrical graphite resistorgiwxe1z 9 7wys3 qrg76 has length L and cross-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 L. What is the ratio of the new resistivity to tgzsww9g rx7e137y6qi he old resistivity of the cylindrical resistor?

  98.20: Wire I and wire II;cq n1al sn69s are made of the same material. Wire II has twice the diameter and twice the length of I. If I has resistance R, II hasnna; 9cs1 6qls resistance

  99.31: Wire Y is made of the same material but o ()wu( vowuw63di(c(.etm sahas twice the diameter and half t6c( diu(v aweou(t(w3wm os.) he length of wire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and k2wyev.u/* h(atweqc35 *oyw radius r. This 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 thisu o.*eaty2*wwqwk3 5/ he(yc v process?

  07.27: A junior Thomas Edison wants to make a brighter light bulb. He decideszwjzo 04tcjw+ 0:iyk 5j4ze )l to modify the filament. How should thezl o4ztwi5 e:+zw0 cyjk40)j j 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 j7cty,+b w /ip,cgri 6 u9q6frof the same material. The length and radius of each resi9, +wtgcri c66qpui7, frb/yjstor 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 battery in the zx*gw;li+;s 4kj) ytyfollowing way: “Two resistors are connected in series.x jk zy);;4wgyslt*i+ 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 inteck9g mi(waduk6 ojf84u;l01a:l + e1x0nsp ytrnal resistance 10.0 kW and the ammeter j;aa8tlou1s i d9f g0w k601k+u:(yxp4m e lcnhas internal resistance 25.0 ohm. The ammeter reading is 1.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to thzu0 psvee1b6 /mcu8(le right. The three bulbs 1, 2, and 3 - represec0eu/ebz sv1 mup8l 6(nted as resistors 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 currfbacj *4l+7. y az:ahment in all three resistors is equal, which ofy jbhl*. z:fm4ac+7aa the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed of usi . +4bs7mqwk)t-oy5 ident u4-om.)kyb+t7isqw s ical light bulbs and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following staqk*,sn0lwa g7fqs(hk25-f 7qai8iak tements is NOT true concerning the simple circuit shown where resistors R1, R2 and R3 are ha-a f gqh8(7kqlqwss0*,fikn a75i k2ave equal resistances?

  17.29: Two lightbulbs X andY are connecte.g(/:;zlnoty nb iac* d 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 represents what is observe;l * :btin(a/cg. yzond?

  06.34: How many coulombs will passg fh;;/iei3gq through the identified resistor in 5 seconds once the i i3fg;g;ehq/ circuit was closed?

  00.23: If all of the resistors in the following simplmx,+*q n:f zvxa)j yl0e circuit have the same resistance,q,:)mjl0x fanz yv*x + which would dissipate the greatest power?

  98.34: In the accompanying c qx8rlzk6bp:ene (:5t ircuit diagram, the current through the 6.0 Ω resistor is 1.0 A. What is the :txpb8zl k( ne6:qr5epower supply voltage V?

  97.27: Three resistors i /3o4 r5g o2k0hj oeks.dv,trR1, R2, and R3 are connected in series to a battery. Suppose R1 carries 203j/4o ighkdt5evrsr ,o o.ka 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 R3?

  99.40: Three different resistors R1, R2 andR3 are connecthicfefyyt*sz :g 69t+ d*z:c )ed in parallel to a battery. Supptyy:icz czh :tefs*gf) 9*6d+ose R1 has 2V 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 12qhyc 3s2wrhx ps 9*u;20 volts. What is the maximum value of uhspr *;q2wcshx293y the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulbdy1**q4bu bg a designed to operate at 120 voltsbqb4u *d*1agy ?

  03.09: How much current flows through a 4ifok0d(q 6a,bcc fz 10 ohm resistor that is dissipating 36 watts of k z(c00 foqcia6d1fb,power?

  05.21: A household iron used to press clothes is marked p;he .k :i,yoal ,ui/j"120 volt, 600 watt.” In normal use, the current in it ip :yui,hi/.j; loa,eks

  01.05: Which of the following resistances cvm+-o)x maqn4 ould NOT be produced by a circuit containing only three identical 6Ω r+vqx -4mn )amoesistors?

  94.37: You are given three 1.0 Ω resistorts:20) c ,nmskc.pq8md. gza ds. Which of the following equivalent resistances CANNOT be produced using all t.ztk0a. 8g :)md nsmpq dcc,s2hree resistors?

  02.06: Three resistors of different values can be connected together iyja gw 8idd+-:l5 fpy9xo .kd1u :ieb.n different configurations. If all three resistors are used in a circuit, how many different values of total resistance can be pl .x+8ei : d9kd bdj.piag5 1y-yuof:wroduced?

  97.35: When a single resistorr onb(f263 sro is connected to a 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? Arf (ors b26no3ssume the internal resistance of the battery is zero.

  96.16: When two resistors, havil /i6(evga eo4ng resistance R1 and R2, are connected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistan4g6(la e/ vieoces is correct?

  02.46: A hotplate is designed such that it has a resistany6n(9eag cyq gf6 asm+(0kd.x ce of 12Ω when operating at 120 volts. What is the minimum 6gy(+y.9 x mkga0ae (nd qs6fcamount 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 resistor that ilm3(ikmhgz/tfr;n)tx*p,o s 9-oopm e+ ,n,ds dissipating 36 watt m) ,o xos-;d3t9mez+ imk,g/p nor,*(lftph ns of power?

  01.24: An electric hp0,t uw1:slvm 4p gscqghm+8- eater draws 13 amperes of current when connected to 120 volts. If the price of electric4vmus:ts,08 -glg+pw chqpm 1ity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how :xc.zr7b e fra*och.kl;8by, much would it cost to keep a 100W lightbulb lit continuously fo8.crck;o bb a:*zhr. l ,x7efyr 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A through a lightbulb resultr6vqgxm 63m r:qui 9c-s in a power of 24.0 W associated with the bulb. Which one of the following choices best represents the resistance of the lightbulb? imq-6uvx6gcq r:m3 r9

  01.10: Each member of a family of six owns a computer rated at 500 wattu+ 4*l fb1fevrs in a 120 V circuit. If all computers are plugged into a single circuit protected by a 20 ampere fuse, what is the mb1 vf+*ue 4lfraximum number of the computers can be operating at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simpl9us(ge ka vkt1 rys *vf617v4te circuit as showrtsvev7kf(ts96gk* u14ya 1 vn 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 dq6(baaj:8d xis connected to four resistors to form a simple circuit as shown to t (aa6dd q:8bxjhe 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 arp vg39 b;jd;.5kqfu vye connected as shown. With the switch open as shown in the diagram the ammeter rq uvpvd9gb5y3j; . k;feads 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 ammeh65 sabkj -w 9lny-,ko hd*1t5es xn4dter, a switch and three resistors are connected as shown. With the swlsy1jx4o9-skah - w* hdet k5b ,n56dnitch 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,6yr r1 htb 27ovhh yx:pax;.8k a switch and three resistors are connected as shown. W6 8;h.rox r2tvxy kaph h:71byith 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?

  12.14: For the circuit shown t4x9r0+, al mtcdqis/f o the right, what is the equivalent resistance? Assume that all wira9ds/ f,+q0 x4imlctres are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuit shown to the right with rextrw 4zqxz,8o*c6 * xwsi,x*z6w wo*rz 48xtcq xstances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors cwup mvr (-hsl21lfu6/ onnected in a combination m lpfs/1(6rw2h u- ulvseries 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 connected in a comlb jtaez6w0k)4fc3 s8s j2. nwbination series and parallel ns2k6048 se3bf)jz cw tw.lajcircuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulo-5kq/gps) i ubs are identical. Which bulb will be /u- kgps5)oq ithe brightest?

  02.21: An ideal battery, an ideal ammeter, a switch and three r.+k b.q; mpxgwesistors are connected as shown. With the switch open as shown in the diagr;m.q wk.xgbp+am 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 amko8 om rc6x 9w3ffo/m:meter, a switch and three resistors are connected as shown. With the switch open as 6kmff3/oc:9 8 wrx mooshown 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 swiby9z2ox g ,g*htch and three resistors are connected as shown. With the switch open as shown in th,yz2h*bogxg9 e diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?