16.09: In the circuit shown, an electri ojx:+lhw f()f.libe;c current exists in the metal resistor 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(l) ;o :b+f .hxjlfiwe resistor?

  98.06: When any four resistors are connected in parallel, the_ f:,se.pjsyw9;o o2oz ________each resistor is thf. e2j oso:z;,syow9p e same.

  06.33: A current thr9 p73nvvgyh7 es*di7bough the thin filament wire of a lightbulb causes the filament to become white hot, *7sd 7ng9bvyvp hi73e while the larger wires connected to the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEiocky2.bgr.t 0 6*yi bDs. LED is the acronym for which one of the following c6to .c*.b0gk2y byir ihoices?

  05.16: A cylindrical graphite resistor has length L and cross-sectional *u67w5:xw*o c 0k8cs n0jtkpb btjnd3area A. It is to be plbcdnp83 : t 0ub06*jjsxkwo5*7nctkwaced 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 II ar5z-jd y4+* g ;evtoucje made of the same material. Wire II has twice the diameter and twice the length of I. If I has resistancj+gtjzvc4 d5* eu oy;-e R, II has resistance

  99.31: Wire Y is made of the same material but has twice the diameter v /nq,4vqj+bp and half the length of wpq vbv,n/q+j4ire X. If wire X has a resistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor hasq)3 . j k n1yb6olu7kputnr; 3wlpn8w+ length L and radius r. This piece of material is then drapwl nqr3ptob8.3;y )ujnk7 1u6n+kl wwn 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 bulb. He decidesie9/ u7dqbu1pd a.1m fnc 4u9c to modify the filamenbuudqmidnaeu71 c .9fc49 /1p t. 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 qf42 k;v,( cb:zf :wvlk hb-htthe same material. The length and radius of each resist-,l (vf2;h:4tfhcb kkbz :wvqor 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 jutm-f/ykxooemyh(*(*j5 o 5battery in the following way: “Two resistors are connected in series. This combination of two resi5ftyjyoujhmm x(e*- o(k 5/o*stors 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 accompb*3h ivdk w/p i2-x-mvanying circuit diagram has internal resistance 10.0 kW and the ammeter has internal resistance 25.0 ohm. The ammeter reading is 1ikwv -m *2xdh /vb-3pi.00 mA. The voltmeter reading is most nearly:

  97.37: Consider the compound circuit shown to the right. The three bulbs 1, 2, ah ydyymin c3w/j8 ++/jnd 3 jch+y/ mjni w+ydy/83 - represented 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 cu5jry *2+vme;kxz6h pto5 s)zi rrent in all three resistors is equal, which of the following statemseh ;5 i*j)yr ozt5k+2vmz6p xents must be true?

  99.37: The diagram at right represents a s9gd1sdkmk 2n 6imple electric circuit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb 9k dds12n kmg6(or bulbs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concr nerjs( p:gl8;k. 9mdp4exkr m o+:/oerning the simple circuit shown where resistors R1, R2 and8g(m ::9pkmo rn+x;srj/e.4dlper ok R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. Bulb X is-ms7w-v16rd8d kl zv wurm:8 f:v rf+b 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 o1-:vrmdb d-vsl87 r8 zw+ mrkwvuf6f:bserved?

  06.34: How many coulombs will pass through the ident-1rsapp0 h/ haified resistor in 5 seconds once the cia p01r /hash-prcuit was closed?

  00.23: If all of the resistors in the c( l;typ-lhbwa* yc,0 following simple circuit have the sa0c *b; (- ,htpaywylclme resistance, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the current eyil 7/heo0 xpc-1q9e through the 6.0 Ω resistor is 1.0 A. What is the power supply voltage V1e7io0 xqpeel c/9h -y?

  97.27: Three resistors R1, R2, and R3 are connected in series to a bat vw+; a9-z yxj2/.ed ah*bdsfktery. Suppose R1 carries a current of 2.0 A, R2 has a resajhaf9 +.-/xsvk be yddz;w *2istance 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 to a yigc qa) zvbu :wm,b,o-f* p wwb+gfl/ko209 1battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipao2 yum, ck pi1avbwfb:,ww /q0*-9z +fo bglg)tes 6 W. What is the current in R3?

  99.13: A heating coil is rated 1200 watts and 120 v psy3qy/8:nvk vha,f3s5 i:t colts. What is the maximum value of the current under these cov8va3y ys pis3hntq 5c ,k/:f:nditions?

  99.23: What is the resista--h y9c +1pux(hhyxzpt9 yw7 ynce of a 60 watt lightbulb designed to operate at 120 volts?wzx9hu 91+yp-ph-yh(tc yy x 7

  03.09: How much current flows through a 4 ohm resistor that is dissi :/,nbd:cfzz(i8o2c48 v /gzzpe ob tzpating 36 watts of powerz e8(ctf/2/czpoiz8bn4v:zg b :ozd, ?

  05.21: A household iron used to press c5bxpq7,+-ik3bgcly bm4 t tt/lothes is marked "120 volt, 600 watt.” In normal use, the current in iq3 i+bl-gbkt/tyc47px t5,mb t is

  01.05: Which of the follo erjd/ ;orf40jwing resistances could NOT be produced by a circuit containing only three identical 6Ω resistor j;/jfrd 0eo4rs?

  94.37: You are given three 1.0 Ω resistors. Which of the followingt+ax8h34 zx dr equivalent resxhxt4a3z8d+ r istances CANNOT be produced using all three resistors?

  02.06: Three resistors of o(uz2:b1s cetdifferent 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 be 2e bu(o1:czstproduced?

  97.35: When a single resistor is connected to a battery, a total power -ix7hna ,1t7./ayvis,ylfb r 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? Ass a7r,-/1.yx,y iablv7t hnfsiume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are crhj9 ;ekk6 yi*e 0 fqb+sz67qnonnected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the resistancek zsrh *kyj7 +06f;nqieqb96es is correct?

  02.46: A hotplate is designed such that it hwm+xg ebj x(*d5 ls01jas a resistance of 12Ω when operating at 120 volts. What is the minimum amount of time that it would tak5sxj*mlg( b1wxe jd+0e to warm 0.45 kg of water from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much curree mh3,kf4m+vrnt flows through a 4 ohm resistor that is dissipating 36 watmvek4 rmf,+h 3ts of power?

  01.24: An electric heater draws 13 amperes of current when conn7*biy5h(imn3hkv j lqdi615-gev.cd ected to 120 volts. If the price of electricity is dh15dy*( 7 v6qjh k35vcn lie-gim. ib$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 lightbulb y v)2alt :fyxj 4h41eolit continuoyyf 1hx ov a)jle:42t4usly for 1 year at a rate of $0.10/(kW.hr) ?

  12.09: A constant current of 4.00 A thr9i/qqsd.l /nf94qu1g 0sj cvsough a lightbulb results in a power of 24.0 W associated witul/i0 ns9f/ sq9.jdsc1gq v4q h the bulb. Which one of the following choices best represents the resistance of the lightbulb?

  01.10: Each member of a family of six owns a computer rated sw0q2v)mpm v.n6df/m ut-48 o vs ,libat 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 operati n q.pmil6sv,8- /db2mou w4v t)f0smvng at the sametime?

  03.16: A 9-volt battery is connected to four resistors to form a simple cwoe xp1 ,79y6 q vut1psfr1ee3ircuit as shown to the righw1,r1oy 9etpv 3q7pfe6e xu1st.
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 c,bwad-g:xs/q onnected to four resistors to form a simple circuit as shown,xqb s:wa/ gd- 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 ai ws r3/m23udc* rju7zf5p kr.nd three resistors are connected as shown. With the switch open as shown in the u z3srfdi3u7/j wm.p*krr 52cdiagram 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 resistt:cr m1,w9mr iors are connected as shown. With the switch open as shown in the dirt9wm imrc,:1 agram 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 y9uiq7 y:t1opm; vf3o( 2kpmathree resistors are connected as shown. With the switch open as shown in the diagram the aypmy: p9fov 2i 3kq(1 aom7u;tmmeter 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 equivalent resc:n0fuf a2s:d6 3zr shistance? Assume that all wi hd f6fs2z3n :cas:0urres are ideal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resistance of the circuih3(bgn l jt6u8t shown to the right with resistances t gu3nhb86(j l$R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows fiyc0mgi;mm /4 ove identical resistors connected in a combination series and parallel cirm;gc /i yo40mmcuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five0p9vy0y qt*tpmxj*p*a,c n ,h identical resistors connected in a combination series and parallel circuit to aampy*,x*,0jvp n qpttyh9*0 c voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagram, all of the bulbs are identical. Wh7hab +re (1wj;f jmvx0ich bul fe+1wam r;(xvb7hj0 jb will be the brightest?

  02.21: An ideal battery, an ideal ammeter, a switch t ow4/ t rmg)z0*29x jmqwndu4 tmz+yuk8)l5vand three resistors are connected as shown. With the switchkqdu)m * n z9rm+vzy28tm)tjl0544uwo gw/tx 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 and 8xsyo-pv v55 jgd7c(athree resistors are connected as shown. With the swi o58vv (j yxsg57apcd-tch 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 andew+/./ okeod fqe69 mc three resistors are connectee6/dq.m +efo w 9ocke/d as shown. 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?