16.09: In the circuit shown, an electric pkdz.c, n- l:la3q q2 xsp3ey.current exists in the metal resistor connected to the battery. Which one of the following choices best describes the direction of electron flow through th e3 x-plqa3q p2kyn,s.zc l:.de resistor and the direction of the electric field through the interior of the resistor?

  98.06: When any four r-b 03gzqn 4nmywmh6 b3esistors are connected in parallel, the_________each resisto bb6gq- 3zy30nmwnmh4r is the same.

  06.33: A current through the th+63vh) ; 4)mioedddlfu:bwdpin filament wire of a lightbulb causes the filament to become white hot, while the larger wires con:4idudeho 3vdl )+ fdb6w );mpnected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. LED m tm:-siyf7 5iis the acronym for which one of the follmt:y is57ifm -owing choices?

  05.16: A cylindrical graphite resistor has length L and cross-secti1ok ud:rfy7 ;ional area A. It iyfr :uk 7;di1os 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 cylindrical resistor?

  98.20: Wire I and wire I jrjzo.r9 lu5;/v8y* s8l gnxaf/nol:I are made of the same material. Wire II has twice the diameter and twice the length of I. If I hyz*l5n 8/rg;8sl:.oj/n jrv uoxl fa9as resistance R, II has resistance

  99.31: Wire Y is made of the same material but has ) 0ssr6zcey.0ngu a d3wy3 .yktwice the diameter and half the lengcnady e.06s)3 s k0zr3w.uyg yth 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 antc+hj2j1 l6fw d radius r. This piece of material is then 1t6jhw2jfl+ cdrawn so that it is a cylinder with new length 2L. What happens to the resistance of this material because of this process?

  07.27: A junior Thomas Edison wants to make a brighter light bulbybm93g2 a8e-3ubip b)b -twwh. He decides to modify the filament. How should the filamenbg3we)wm8hb3 2-a-u ty b9 pibt of a lightbulb be modified in order to make the lightbulb produce more light at a given voltage?

  16.07: Three cylindridje - v:r4uvj*cal resistors are made of the same material. The length and r j*eur-j4vdv:adius 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 resistanceby+dpd zvk,0 z+ p,b0bz4z2ty R, are connected to a battery in the following 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 ik,z zyd+ v+, 0z4tybbppz 0bd2n 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 rplgjf8-e:z.u e/kg0: fj t;qinternal resistance 10.0 kW anket:z8ep rjl f /q-gf.:0guj;d the ammeter has 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 the right. The three bulhr.,ql3los8,33j0 a zsoa m qbbs 1, 2, and 3 - r33s, a qomqzl3h roba 8l,0j.sepresented 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 current in m-t, 5ut yx1ak )k(f bm/wn9icall three rey1 bmm- f,w5c) k/uk(ia9 tntxsistors is equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circuit composed of 5 : j+v cj,5kez2z xwlj)identical light bulb vzj)2jl+e:c zx5w, jks and 2 flashlight cells. Which bulb (or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT trukd y-ln8etvh( 2xs*(k gg-hj:e concerning the simple circuit shown where resistors R1hg(:e8sd yghlx(2n tjkv-* k -, R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X i 9h) p*us 3wppj6a(rits brighter than bulb Y. Assume all circuit elements are ideal. r apjt9wpu)h (ps3i6*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 through the identified resistor in ugz h,w0xi*;u 5 seconds once the circuz0 ; iwxgu*u,hit was closed?

  00.23: If all of the resistors in the following simple circuit have thervv+. s1qt1 vl ibik/t1e2z* a same resistance, which wo1v./r1 *e2zb sv v1liqtkat +iuld dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the curr) n 8 30dh mskjj9n*)xikdyi7rent through the 6.0 Ω resistor is 1.0 A. 3 iyj0d9r h)*ksnjn8k) di7mxWhat is the power supply voltage V?

  97.27: Three resistorsb+hi m )wic-ycji1- f2 R1, 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 diy-mwj 2 1-)cbfi iihc+ssipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different resistors R1, radip q12v hh:biv8 o31s* sr*R2 andR3 are connected in parallel to a battery. Suppose R1 has 2V across it, R2 *p1hsv8haq*obi:1v3rs r 2 id= 4Ω, and R3 dissipates 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 ho am-m6sg -t,-1gjawqci/w0volts. What is the maximum value of the current utighm0 o1ca 6s -jgmq-w ,wa-/nder these conditions?

  99.23: What is the resist + :9bxd2o,vlt;cneqs z duwwub/ 6-fq.bnk3* ance of a 60 watt lightbulb designed to operate at 120 volts?q+ x q;zk2t* 9/ bbf3-,n6wewcsl.dd:u o bvnu

  03.09: How much current flows through a 4 ohm resistoakw3i pb0qo-v*xt55 ur that is dissipating 36 watts kq5x uo50p i-w*ta3bvof power?

  05.21: A household iron used to press clotakl0u)e set) op0,bl -yao;,shes is marked "120 volt, 600 watt.” In normal use, the current in it);a-l0)pe,, otuob s0l keys a is

  01.05: Which of the foll 4jepfgjsb/b- +g7gh(owing resistances could NOT be produced by a circuit containing only three ide 7hb4(-j spbg/+jgfge ntical 6Ω resistors?

  94.37: You are given three 1.0 Ω resistmhptig(t d/ wa +9ys9/ors. Which of the following equivalent resistances CANNOT be produced using 9t/ms/pw(+y ghadit9 all three resistors?

  02.06: Three resistors of different va)/5hv 7 eq+; 77 msbxql6 dmw;avycsftlues can be connected together in different conxmdv wts h+cy7 s;v);57/ em7a6qbf qlfigurations. 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 conn na;1 m/xr9vx4lu ,w)gz9wcmaected 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 usin 1a zmn4a)9;9c grxw/, xumlwvg the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are connectedq8n +k y1j-maw in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistanckm1n 8yw-q+a jes is correct?

  02.46: A hotplate is desrl fg -* ip7oc3/3sautigned such that it 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 kg of watru3-o3p*t lcfags/i7 er from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much current flows through a 4 ohm resisttt0d1o)g yarjw+6 iy/or that is dissipating 36 watts od) a j+6t /girytw0oy1f power?

  01.24: An electric heater draws 1z m u;o.mte2 qcf4)tc-fc,:rucf4ii:3 amperes of current when connected to 120 volts. If the ), tzeiui2.t;mu-cfc: fcf4 m r4o cq:price of electricity is $0.10/kWh, what would be the approximate cost of running the heater for 8 hours?

  08.05 Approximately how muc r-j6v- uafom0h would it cost to keep a 100W lightbulb lit continuou-of vuj6a- 0mrsly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant cuao;06kv,(7 e:yyyv+zri o) znb(kr xerrent of 4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. :)yekk ; 0oe(rv +y(7inyxbz,ra6 zo vWhich one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a famiyxfb.hnn0 1d z(*2khox ez;1dly of six owns a computer rated at 500 watts in a 120 V circuit. If all computers are plugged into a sin0f1 e2*xdn .b yzn odz1h(kx;hgle 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 connected to four resistors to form a simple ci(:g18j ifphsorcuit as shown to thei 1j:8( spfogh 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 fo,jed3ns;wu4f ur resistors to form a simple circuit as shown to the rights, ne jw3udf;4.
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,:s,uwzs+hy 8k hm v0uy1puw3 swj/:x.xl6 ,xj a switch and three resistors are connected as shown. With the switc zus+yw16x:p:3u, w8ysl v/,jjkhmu xsh 0x.wh 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, aqevip7 dz.bjdjuq+3+ 0 1:lur switch and three resistors are connected as shown. With the switch open as shown in the diagrjz:v+bq3 0dequ.1udilj 7pr+am the ammeter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal batt, m5uza urx78pery, an ideal ammeter, a switch and three resistors are connected as shown. With the switch op58x m,uap r7uzen 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 equivew5a wcoq3i w4)c)v *salent resistance? Assume that all wires are ideal, the battery3oc4ww )sc*ev5)qaiw has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of t7)pvio3/ .0buh jyw behe circuit shown to the right with resistances eviuj.w bp o07)b/ y3h$R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five idenmo+q8chd4m e8 tical resistors connected in a combination series and parallel circuit to a volto+8q 84dm hcmeage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows)e,v6 v+ahz cd five identical resistors connected in a combination series and parallel circuit to a voltav )ze+dhv,6acge source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit dr yo/7 np 5/q9qkhb,siiagram, all of the bulbs are identical. Which bulb will be the br/q,sih p/ro5ky 7b nq9ightest?

  02.21: An ideal battery, an ideal ammeter, a switch and threee7adb*;, vd dk resistors are connected as shown. With the switch open as shown indv, a bd7d*ek; 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 i v xm).e5ifxj8deal ammeter, a switch and three resistors are connected)ji 8vxfmx.5 e 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 ammetermjxj6/ 0uqh pj2o8x4l .j3vq h, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter req2m 83.xxpu/jljjv 6j0o qhh 4ads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?