16.09: In the circuit shown, an electric current exists in the m /dlg :6oy1vha; 3ibjjetal resistor cond3yo gv/ hji;labj16:nected 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 resistor?

  98.06: When any four resistors are connected in parallel, the_________eaccejmq60vz q8:+mxv( kh resistor is the same.:6m+qe0vm kqjvz8x c(

  06.33: A current through the thin filament wire of a lbfrl8 hh 1s8qnp23r:kightbulb causes the filament to become white hot, while the larger wires connected tos r3fr8bk pnh2l8h1:q the lightbulb remain much cooler. This happens because

  13.08: Some standard household lights are being replaced with LEDs. mmkmq x0jmgocq7;.7tw) 2 pav 9au *q3LED is the acronym for which one of the following cm 7 q 97pocma;a0vjux2mmgwqq. )3*k thoices?

  05.16: A cylindrical graphite resistor has lengthe*q63s7 r(a1x m h4cti1ss lid 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 thx ar7l(s1 ih14*63isdcm teqse 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 twice theja314b9eiqqot4 oy 0h diameter and twice the length of I. If I has resistan031yjo4q4ia bq eo9ht ce R, II has resistance

  99.31: Wire Y is made of the same material but f ka.*a-kqn*ihas twice the diameter and half the length of wire X. If wire X has a ik-f *an qa*.kresistance of R then wire Y would have a resistance of

  03.23: A cylindrical resistor has length L and radius r. This piece of material fjint5 fa/53k tfc*vdqc ./) xis then drawn so that it is a cylinder with new length 2L. What happens to the resistance of this material because of this procescx3d q./k5t f)n*vfi 5t jfca/s?

  07.27: A junior Thomas Edison wants to make a brighter ligh*o8hnw .t/0 z jp4smint bulb. He decides to modify the filament. How should the filament of a lightbulb be modified in order to make the lightbulb produce more light at a given v pmz/8hjns4 t ni.o0w*oltage?

  16.07: Three cylindrical resistors are made of the saurd+2+ ham; tzme material. The length and radius of each resistor is:+ ud+t2r ;hmza
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 resistorsx+;u(3ocb kt4y0 fl )dg2ken c, each of resistance 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 in series to a fourth resistor.” What is the equivalent resistance of this arrangement of2o u(d4ekcgf )l3byct0+ x nk; four resistors?

  95.35: The voltmeter in the acc*r:. w+oooqp -1ekbywompanying circuit diagram has internal resistance 10.0 kW and the a:r1oowowp*.+b y q -ekmmeter 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 scllx 3z j4/yvh+v j;8lhown to the right. The three bulbs 1, 2, and 3 - represented as resix+/hczj 8 4vllv3jy;l stors 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 curren6 si,fh5+d+w m7ng qvqt in all three resistors q6gwnfq5m ,hid7+ +vsis equal, which of the following statements must be true?

  99.37: The diagram at right represents a simple electric circyxg 8fu3aa(g+pssri( m/bdm f)-/ky( uit composed of 5 identical light bulbs and 2 flashlight cells. Which bulb (or bulgxp/i-ky r(yfmsug) f(b+ /m8a(asd3bs)
would you expect to be the brightest?

  00.03: Which of the following statements is NOT true concerning the simple cixt1d u)1 suwdu4(vy+yrcuit shown where resistors R1, x1ysu4v dduywtu)(+1R2 and R3 are have equal resistances?

  17.29: Two lightbulbs X andY are connected in series to a battery. B6n4ljmzio e+n: y:5.l j 0lbvwulb X is brighter than bulb Y. Assume all circuit elemennyj5 l.mlz::bv 6on0lw4+ij ets 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 couloj 11 duj4elqfz+q7;dk mbs will pass through the identified resistor in 5 seconds j1dk4 7eqz+uqfl; jd1 once the circuit was closed?

  00.23: If all of the 00 0vghj h*nf ;lvnih1resistors in the following simple circuit have the same resistajhni; 0gl 0fv*hh n1v0nce, which would dissipate the greatest power?

  98.34: In the accompanying circuit diagram, the ma0 i88uouc xjbz,77 icurrent through the 6.0 Ω resistor is 1.0 A. What is the power z0u,mjbi 8i 7auoc8x 7supply voltage V?

  97.27: Three resistors R1, R2,vf mstg1a,xd4u* yk(* and R3 are connected in series to a battery. Suppose R1 carries a current of 2.0 A, R2 has a resistancg41 *tma*(vkx, y fduse of 3.0Ω, and R3 dissipates 6.0 W of power. What is the voltage across R3?

  99.40: Three different re (t 3uos3 iq8 g5mkt:3ebrsc-ysistors R1, R2 andR3 are connected in parallel to a battery. Steb qy rkg3:-835mso 3ciu( tsuppose 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 120 volts. . dq;(gjtu9m j What is the maximum value9uj;g( j.tqm d of the current under these conditions?

  99.23: What is the resistance of a 60 watt lightbulb desiggqlf;5hi7n*:lvd ncn-b :l7 b-m huu .ned to operate at 120 vi5n7 b-cf:n.d7m-l nl: hl ;g*uqvubholts?

  03.09: How much current flows through a 4 ohm resistor 4 zbc6xqdt* 0xthat is dissipating 36 watts of pow6*c xqxz4db t0er?

  05.21: A household iron used to press cue. a +yb1u1:ey 7-yapoojta8lothes is marked "120 volt, 600 watt.” In norma1.uba 7eoayp -j+ 1 oy8ate:yul use, the current in it is

  01.05: Which of the following resistances could NOT be produced by vq+zdcip22 i i9vkwo/nc-;*pa circuit containing only three identical *-;2vc +pw9voz2ickd qp/nii 6Ω resistors?

  94.37: You are given three 1.0 Ω resistors. Which of the followij ygk+) za h;hh 2z39:tjnsjr;ng equivalent resistances CANNOT; n:hg a) jtj 3+;zz9hkhrjs2y be produced using all three resistors?

  02.06: Three resistors of different valumk7z md 5sy l8cl7*wnc;3:/;yi gjiaq es can be connected together in different configurations. If all three resistors are used in a c38dz*anlkcj l;7 ;qgc:m/ m5wiiy 7ysircuit, how many different values of total resistance can be produced?

  97.35: When a single resistor is connected to a battery,x aqbx1xne 88--2m7h nfpvx: i a total power P is dissipated in the circuit. How much total power is dissipated in a circuit if n identical resistors arexeqp i: a 8-fxnm72n-b 1vh8xx connected in series using the same battery? Assume the internal resistance of the battery is zero.

  96.16: When two resistors, having resistance R1 and R2, are c0+4 pz,c 6hfd6cig ieju(1saj0 w5fks onnected in parallel, the equivalent resistance of the combination is 5Ω . Which of the following statements about the 0ja(4wc 6 i5juf,kf6 z1c0ps hdgie+ sresistances is correct?

  02.46: A hotplate is designed su8wl4 lvke,nny844(qp2 hut ouch 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 watyk t4n4 , lp8(28unoe4lh wquver from $15^{\circ}C$ to$85^{\circ}C$?

  03.09: How much currentcop 2;ln0 0w )(t0pqmxrpl,en flows through a 4 ohm resistor that is dissipating 36 watts 0c p02qxnprlot, 0l(pn);me wof power?

  01.24: An electric heater draws 13 ampe +v 1)ramvc,iures of current when connected to 120 volts. If the pricv v cm)iu+ra,1e 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 lightbulb lit kaax. igwa+ u-9bv .bwi(3e9acontinuously for 1 year at a ra9+uaxwg.9v(ika a-ea.3w b ib te of $0.10/(kW.hr) ?

  12.09: A constant current of uaeh(ol1 u 4b ,1xq8d4 gs/u u7qf)cas4.00 A through a lightbulb results in a power of 24.0 W associated with the bulb. Which one of the following choices bes) fhas8cedu,(1uq go41 as qxubl4/7ut represents the resistance of the lightbulb?

  01.10: Each member of a family of si0 jtzn/s)mct g,zq.+5jvmx u7 x owns a computer rated at 500 watts in a 120 V circuit. If all co/mtcx)05jtnqs+j guz v m,.z7mputers are plugged into a single 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 circuit fto96f;7b d qsas shown to th76;fd9soft qbe 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 resis 04 +7iyndxknxtors to form a simple circuit as shoi 4 +nxndyx07kwn 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 switch2u8iu jij3 dw, 2eod(p and three resistors are connected as shown. With the switch open as shown in theiei 38p(udj, dj wo2u2 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 resistors ar/m v3jbh5gm2q/5f-z eh ndh r)e connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amp 5 q3bheghh/fn-m2m)r5 d jv/zeres.
With the switch open, what must be the voltage supplied by the battery?

  02.23: An ideal battery, an ideal ammeter, a switch akb/r lf0iw)kuky)oy g*(v48g hetmm6d; ,ij3 nd three resistors are connected as shown. With the switch open as shown in the diagram the ammeter refb guwy )k/ k3ht iel0k4),* roidygj68mv ;m(ads 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 res; fdmbvxun*8k .z4wl rj6xyd*y pq4 i0c/2vp0istance? Assume that all wires are iund q .jm 240zp f*dv68;vi k lb0c4xr*y/pyxwdeal, the battery has no internal resistance, and all three resistors have identical resistance R.

  09.07: The equivalent resiso9vr 8q skp3pq wd8r(6tance of the circuit shown to the right with resist 9wov6qd8(3pkr 8qrpsances $R_1 = 4.00Ω$ , $R_2 = 3.00Ω$ and $R_3= 2.00Ω$ is

  04.20: The diagram below shows five identical resistors connected in aab- 18c7 hltxx ;4iprd combination series and paralle8dr4hp1i ;x7x - alcbtl circuit to a voltage source.
Through which resistor(s) would there be the greatest current?

  04.21: The diagram below shows five identical resistg 6r*snr6f. fx8p)u-* trvm ouors connected in a combination series and paral tr*rg .uvno )mu- *68pf6srxflel circuit to a voltage source.
Which resistor(s) have the greatest rate of energy dissipation?

  07.29: In the circuit diagr+8 s-tl)y-,ajyil kb 9+efce/c4g og-w; inlvam, all of the bulbs are identical. Which bulb will be the nloib,;j+akw 8tv- y)-sg-c 4fleey + i/c9lg brightest?

  02.21: An ideal battery, ayaibvp;rme3-4dtp(moghd81 6nw w 43 n ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 am3w 4o1myem dhi -gda84v;r3p6n pt(bwperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

  02.22: An ideal battery, an ideal ammded 4605 vys5b aag6kqeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the6dae5k6v y5 aqbgs0 4d 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 resi zju 0g1 wnfxl-c;nm z,h593dboj.2adstors are connected as shown. With the switch op1w0j bxd m;zcoalz5 9-dh,fn2g un.j3en as shown in the diagram the ammeter reads 2.0 amperes.
When the switch is closed, what would be the current in the circuit?