A device that produces electricity by transforming cd4ysr)w lwa -.6 y 89buunik;mhemical energy into electrical energykawwriuny)9.6u4- m8d lsb;y is called a

  A car battery

  The total amount of charge that passes through a wire's full cross section at anke go zkuwsx5h3tz-t;/l*9. ty point per u*szeh5t;t.k gu9-olt k3/x z wnit of time is referred to as

  The direction of convention current is taken to be the direct f0e:v2npm9y jion that

  A coulomb per second is the sameoz.pk 3h,as/s(d 8syn as

  Car batteries are rated in "amp-ho u 6qvzq9zv);gurs." This is a measure of their

  The resistance of a wire i,vb z 5h*t2pqqx* +bgls defined as

  What is $1 \; \Omega$ equivalent to?

  The resistance of a wire r5 6 qvf1vg m)fu/udm,is

  The resistivity of a wire doy/*7 +* syi fjb/mjyd :vl4dgepends on

  Which conducting material has the lowest resistivity gvf0wj : .uqnc6*g2q2hwphb9value?

  Consider two copper wires. One has t-p 8wtfgiyl 0es2 s-(tnc88 hlwice the length of the other. How do the resistiv (sywhl 2-f0p s8-tcgeln 88itities of these two wires compare?

  Consider two copper wires. One has twice the length of the oti508;k fltqy)xy77ltf ),qf ryuke a+her. How do the resistances of these two wires compare?kt)rqty8 yll5xfa) + ,07f7fqeui k; y

  Consider two copper wires. One has twice the cross-sectional areaxv-1ftmizsi jhz9:r)( p/cv3 of the other. How do the resistances of the zj-3p:iv1xtfv/m s hrcz9)i(se two wires compare?

  Consider two copper wires. One hasj :hgvc-f u06b twice the length and twice the cross-sectional avg0hc6u b :-jfrea of the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius is doubled. By what f x +j0vomn;thcpsb7f :vc+t;1 actor does the resistance chan0bvx;vc7 jco f:t1 htnpm++s;ge?

  How much more resistance does a 1.0 cm dia3dny w-4arv2ck -x,ftmeter rod have compared to a 2.0 cm diameter rod of the same length and made of the same ma 2frwy kcad,3ntv-x-4terial?

  The resistivity of most co) 0keo qx(dgm+ h3pm(fmmon metals

  Negative temperature coefficientsdof*g- mj.uz, 4c)zmquk r-v+ of resistivity

  What is 1 W equivalent to?(l5c ua -6nmxm

  A kilowatt-hour is equivalent r:ba55jh lj6 nf7k o3sto

  If the resistance in a constant voltage circuit is doupxr* w 0exwa(n4oa ow1t5c7j1 bled, the power dissipated by thw*prx xtco5j41ew a 7oan(w1 0at circuit will

  If the voltage across a circuit utt4ll5*dh3; x wb,coof constant resistance is doubled, the power dissipated by that circuit t5 4cx;olu3*db wt,hlwill

  If the resistance in a circuit with constant current fc-sn vlj0p 9g+lowing is doubled, the power dissipated +l nj- v9cgps0by that circuit will

  If the current flowing through a circuit of constant resistance is dow0/ s gnx94/o0hit*vb9s a mddubled, the power dissipateda99/v 4wx00nmdds *h/g o stib by that circuit will

  During a power demand, the voltage output is reduced b9 ;br7 tzlip(olhc 2,z;8makzy 5.0%. By what percentage is tk;h z9 m2clt7zorzpi8lb;a,( he power on a resistor affected?

  A current that is sinusoidal with respect to time is referred ;-tasqlg m 7+ato as

  Consider two copper wires each carrying a current of 0 l*c*i 0 futplw5qd*g gjq.i/3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in thewi5/cq. gjfd*u*gp0it q 0 ll* larger diameter wire is

  Materials in which the resistivity becomes essentially zerors.f kvcw;rqis+ 3 5dyt30wi6 2/mxno at very low temperaturq5c sx;dm02k iw3oyvrs/ .6wn3fti +res are referred to as

  What current is flowing if 0.67 C of charge pass b1a4 71,(zrts-piw rwttp8eua point in 0.30 s?

  A charge of 12 C passes through an electroplating appag93b w:s l8umgolz 1z5o6awm(ratus in 2.0 min. What is the averagg 91b 3(:l8w5umzsog 6zomwale current?

  How much charge must pass by a point in 10 s for te-8ak 2zc j0uihe current to be 0.50 A?

  A total of $2.0 \times 10^{13} \; protons$ pass a given point in 15 s. What is the current?

  What current is flowing if bus-g7n9t mp8 k.2xkd$4.0 \times 10^{16} \; electrons$ pass a point in 0.50 s?

  If $3.0 \times 10^{15} \; electrons$ flow through a section of a wire of diameter 2.0 mm in 4.0 s, what is the current in the wire?

  A coffee maker, which dz z vd)b96wp2praws 13.5 A of current, has been left on for 10 min. What iz 9 p2wpzb)6vds the net number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on av- 6e;eu(37rdohk vnb/td.yi5 )h bsj/c :irt metal partrvv /bsi 3.d-6o)euhjc7ti:; k5hn/tr eb(dy by using a current of 2.0 A. How long must the current be allowed to run to deposit this much silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference is req nu0)p8f dldhxa(,huh3lzy1/m q )xn.uired to cause 4.00 A to flow through a resistance o()fn.0 q )x nh8h1 ldu xmp,d/hauzly3f 330 W?

  What is the voltage across a 5.0-W resistor d8 e4cyf6l4pqif the current through it is 5.0 A?

  A 4000-W resistor is cz2k0btvsey2z; 7c8r nonnected across 220 V. What current will flow?

  A light bulb operating at 110 V draws 1.40 A of current. Wp b4frhsxhr(-4t 9ezusg / 2f*hat is its resistancehrrsep*t/ g4h( f xb-9uzfs42?

  A 12-V battery is connected to a 100-W resistor. How many elyttib(p)mk6e8e z :9y ectrons flow through the webeiy6 t(9mt p)zky:8ire in
1.0 min?

  What is the resistance of 1.0 m copper us(8vjyoyi15c1m ex/ b48 tgn wire of diameter 0.40 inch? (The resistivity oj4y b ev/8 (nx8mcu 1s5oy1tigf copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter andqpi8k(s8g :qm 45 m long, if the regsp8k8:(i qq msistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivi(,)z2;jl cl brv1gn mity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire z8 8pd -;aju9f))azevklot (o (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures 0.040 ohms. What is itas2g,auh6nf8 s resistivity?

  Calculate the current through a 10.0-m long 22 gauge (b: ym28.ssmji the radius is 0.321 mm) nichrome wire if it is connected to a 12.0-V battmbs8s mj y.i2:ery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long and of rectangular cross-section, 1.+mkr0np18n0q2hx h mer2dq u40 cm x 2.0 cm. What is the voltage drop along itqrkr2mn pe0 0mhdxn48u h1+2qs length when it carries 4000 A? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire has a radius of 0.50 mm and ,m be1i llv+h9a resistivity of $100 \times 10^{-8} \; \Omega \cdot m$. If the wire carries a current of 0.50 A, what is the voltage across the wire?

  A 1.0-mm diameter copper wire (r. +tgn8gtdkf6 esistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has avl lr grmy:7-1(ju z6y resistance of $18 \Omega$ at a temperature of $20 ^{\circ}C$. What is its resistance at a temperature of $120 ^{\circ}C$? (The temperature coefficient of resistivity for carbon is $-5.0 \times 10^{-4} /^{\circ}C$.)

  The temperature coefficient of resistivity of platinum 7kn )zr(i1me9:eqo2ps dt ss; h+r a8nis $3.9 \times 10^{-3} /^{\circ}C$. If a platinum wire has a resistance of R at room temperature ($23 ^{\circ}C$), to what temperature must it be heated in order to double its resistance to 2R?

  A platinum wire is used to determine the melting point of indium. The resistance8 4bolk. hkn7e of th.4l87nbhok e ke platinum wire is $2.000 \; \Omega$ at $20 ^{\circ}C$ and increases to $3.072 \; \Omega$ as indium starts to melt. What is the melting point of indium? (The temperature coefficient of resistivity for platinum is $3.9 \times 10^{-3} /^{\circ}C$.)

  5.00 A is flowing through an66v3mxep awz3d9+4 mt jnpl l2 $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What 1 g mevy)ukire7e)72ncurrent will it draw?

  A 150-W light bulb running on 110 V drawsov2sw r9m,2w msnsuguc42 2*n how much current?

  What is the nominal resistance of axb0o;muys 2.d 100-W light bulb designed to be used in a 120-V circux02 .yub mo;sdit?

  A toaster is rated 800 W at 120 V. What is the resv)eh c 8aw14 ie0-jm dm0;f2vfmmz9 yfistance of its heating element)00j v 1m;f9 -a yimfezhmvc4dw2e m8f?

  A 200-W resistor is rated n1f4 ii7ply j a+f2-yqat $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is r.tojd2qjn j:9ated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, whaab c9f 2regxs.ers2:5t current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resistanceq2lz chkr-*)m ?

  A 25-W soldering iron runs on bbzy . a*z.k9h110 V. What is its resistance?

  How much does it cost toftia,4 r7xd n2 operate a 25-W soldering iron for 8.0 hours, if energy cx7ntdif 4a2 ,rosts $0.08/kWh?

  How much energy does a 100-W ligzyd0m) +mjj :)4copm /bqs4tsht bulb use in 8.0 hours?

  A 1500-W heater is conne0ya(i;*haxl h v3)yyvcted to a 120-V line for 2.0 hours. How much heat energy is prodyy;(i 0a yvxa3* lh)hvuced?

  A battery is rated at 12 V and 160 A-h(qs/xt1 m 0q3 pyra4q a1sk7bb. How much energy does the battery store?qt0 q/qp ab1ma4srx7(1ksyb3

  How much energy does a 25-W solderinli0tn6 83a tqu/68j vtnu* , 8qceckjyg iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 v2 ltt9 f:*etwhours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricitye 92t lfvwt*:t used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned tqaj dh9.d3js+y4z. -viymj/ on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to 4i yd-t.jvmydjasz+.3q 9j/h run the computer annually?

  The monthly (30 days) ele.o g*htx 7l 9o7zq8snyctric bill included the cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light bulbs for 5.0 hr/day. How much did these items con9zs 7t8xo.g7hn*lyoq tribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier opeqk; mq. v/lo-krates on 240 V and generates heat at the rate of 2.1 kW. The heating element shorts out and, in repairing it, the owner shortens the Nichrome wire by 10%. (Assume the tempera q.-lk/;vqo kmture is unchanged. In reality, the resistivity of the wire will depend on its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flow2qdex7xq,w9ks; v( tnh) 0gzh s through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs kll699qveq* e $1.49, and will run a portable CD player for 6.0 hours. Suppose the battery supplies a current of 25 mA to the player. What is the cost of energy in dollars per kWh?

  A motor that can do work at the rwu hva6f,g1uoi)t 84 uate of 2.0 hp has 60% efficiency. How much current does it draw from a 120-V line? (ao1 46 fg8uv)tuih ,uw$1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source.xkp)y f ou*g5/ What rms current flows through this k/ o*x )puyg5fdevice?

  A 500-W device is connected to a 18/gx dgpk0td7 v),;zsi w9wu z20-V ac power source. What peak current flows through thisz gudzs d/w7t0,giwv xkp) 98; device?

  A 500-W device is connec -2im)eh3invuhvv v 0q(fh2*cted to a 120-V ac power source. What is the peak voltage across this dev)emnfh2v2q h0vc 3*v u -i(ivhice?

  The diameter of a copper wire is 0.081 inch. The maximum23ds6 gvmc,w 6ty h8lm safe current it can carry (in order to prevent fire danger in building construction) is 20 A. At this current, what is the drift velocity of the electrons? (The number ofml 6gh8,vcy6w 2 st3dm electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)