A device that produces electricity by transforming cq4 nufz06nof.hemical energy into electrical energy is called a0qz46nun. f of

  A car battery

  The total amount of charge that passes through a wire's full cross se3jy(jra a-nb2ction at anj2nrja3 ay(b- y point per unit of time is referred to as

  The direction of convention current is taken to be apqp-k *in je1y+ml db8e .fh.p9 v7u3the direction that

  A coulomb per second is dgc,,y*2rmysa fd 6 6;ycu e/xthe same as

  Car batteries are rated in "amp-hours." This i1.jiwgeowqt*d lx; .1s a measure of their

  The resistance of a wire is definedx*6xsqkb-6b p qg2py, as

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

  The resistance of a w3yomedisle2 u t66r;;ire is

  The resistivity of a wire dependpi,4yjc x4n p2rj0e q)1q,o+ o6ym elps on

  Which conducting material has the lowest resistivity valu ;z3 4mywyqnl(9 zu az7-xi4rje?

  Consider two copper wires. One has tw ab,drzj e t5r7)fee.0eh,a* lice the length of the other. How do the resistivities e)5ej.rr d7a,lez,a f* hb0te of these two wires compare?

  Consider two copper wires. One has twiczlt; vq 2on6t0e the length of the other. How do the resist6v olt;2qn0 ztances of these two wires compare?

  Consider two copper wires. One has twice the cross-sectxr 3h2rz*nk )zto 6vh(ional area of the other. Hrr( 2 ht)vkozxz*3hn6ow do the resistances of these two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-3e3t azh*43si kox p:4pu;cet sectional area of the other. How do the resit4phtk* xs;z3:eo paeui43c3 stances of these two wires compare?

  The length of a wire is doubled a3z i;d.e+ l h-h:hnqcund the radius is doubled. By what factor does the resistance cd -+qihe3l u:hnzh ;.change?

  How much more resistance does a 1.0 cm diameter rod have.3sr,o sm+*vei;adoad+wo+4 dtk1m m compared to a 2.0 cm diotwo3 dd s+a i41dmka.+v *,mm+o;res ameter rod of the same length and made of the same material?

  The resistivity of most common metals x7g)y aka0us2

  Negative temperature coefficients of v 2zm,r8gn gw;resistivity

  What is 1 W equivalefol pts )7/nr6* y,ykgnt to?

  A kilowatt-hour is equivaley2nhoum2 0y-30eix u qnt to

  If the resistance in a constant voltage circuit is doubled, the powergoo;6 -ai+q1dz l-4ta -rv3:pqhovs t dissipated by avl-4 -dqg por +6o; oqt3tiaz1:svh-that circuit will

  If the voltage across a circuit*u7):o yx* v:q t0iva 0i;9vq vdhlsnc of constant resistance is doubled, the power dissipated by s0io)tc7v0hv9 v*:*qxvqay li d:n;u that circuit will

  If the resistance in a circuit with constant current flowing is dou8vo* m/llwoa/bled, the power dissipated by that cl/wv ool8m*/a ircuit will

  If the current flowing through a circuit of constabk2(nj 4xd9 mant resistance is doubled, the power dissia (xmk2 j94ndbpated by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. By jmde2z+sy9v-k/);uf sg1+ b (csn qkjwhat percentage is the power on a resistor aff zvsscyd-)k( 1k+jmu qb 9se/f+g j;2nected?

  A current that is sinusoidal with respect to time is referred to nfpa;2y: 2pwnf u;nm q pa6o+:cko 4/xas

  Consider two copper wires each carrying a current of 3.0 A. hoam+tm 0b:4nq -*za9iyv n/ fm/d;ju One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire 9t/abmvnzjd iu-hny/a m+:40;q*m of is

  Materials in which the resistivity becomes essentially zero at very*hauxwz 9rt 2sxx --kse.7sc: low temperatures are referra-s :c7.-zt x w 2kessxxuh*9red to as

  What current is flowing (el6 h seqmt.3if 0.67 C of charge pass a point in 0.30 s?

  A charge of 12 C passeobh6n*9 5vdv6 dmjw lgon9 +7es through an electroplating apparatus in 2.0 min. What is the av9*vn9on+ohbdd6e76vmj5 lw g erage current?

  How much charge must pasf,jan 2t6*aqe/d sp j)4 aimcb-vte7 af42 ic,s by a point in 10 s for the 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 flowinc1wi fd5bz. +8 sukb *2ita5fvg if $4.0 \times 10^{16} \; electrons$ 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 draws 13h )6lz sn( 7suit0cd1x+ zh4dd.5 A of current, has been left on for 10 min. What is the net number of electronxlsd( i+1dc 04u)6s ndhthzz7s that have passed through the coffee maker?

  In an electroplating proc-ox :lxlo(/ ocess, it is desired to deposit 40 mg of silver on a metal part by using a current of 2.0 A. How long must the current be allowed to run to deposit this much -o :o(xocxl l/silver? (The silver ions are singly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cause 4.00 A to fc;05zh5kj qwklow through a resistance ofjhc ; w05z5kkq 330 W?

  What is the voltage across a 5.0-W resistor if the currenp c9*xlvh,* g wxwh1s(t through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current will flowp9gok4 - nng,a?

  A light bulb operating at 1107i),poyf4ue nu m//uo V draws 1.40 A of current. What is its resistance?)uo4ip/n e,uu /f7o ym

  A 12-V battery is connected to a 100-W resistor. How many electrons fq2b bfyyg r)0/low through the wire yrbq) b2y g/f0in
1.0 min?

  What is the resistance of 1.0 m copper wireucd6hko+ bz7* of diameter 0.40 inch? (The resistivityzb+k o6c7 h*ud of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45 m loobs;g 8y) gyd8 j )lbsb4,j qqu,w(7hzng, if the re(bq7;w, ubo 8g,j )s )4hjy8ydgszqlb sistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resist74gq k /5(dyc +ukhldrivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wie:wp ggg,,dg a32w2 qore (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. ug6 stiqwl9sq i5(v+/What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius igi l:2nch t q7 3ydus4mn:i2x(s 0.321 mm) nichrouxis (cdg:qt 4n23y7l2n mh:ime wire if it is connected to a 12.0-V battery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 cm long a1w)wz f2jc 5cend of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along 52c1f wje)zcwits 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 nichr/z6e lp6vqs ;umxt6u+ome wire has a radius of 0.50 mm and a 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 (resi - ,odmxypjdp )sz;f8cfp3ezi )6-ir 8stivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistanoa;93dok f2i ice 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 ss lujtg0n-h,c.q avvc20 7:+l ylu*dof platinum is $3.9 \times 10^{-3} /^{\circ}C$. 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 poin) jz8a*pvil b77nuc6sv (wh0wt of indium. The resistance of the platinum wire ivw6vi j)bpc h8*7z u(sn w7al0s $2.000 \; \Omega$ 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 an rtr 8,imn abwxc4-8- f$10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will it bbvnqjk8xoud5. 1dd9 j0 j3r5 draw?

  A 150-W light bulb runningy-/ bew bbhyo ho5-xzn. 4xqr+ 0fc:dy2(a ,sw on 110 V draws how much current?

  What is the nominal resistan5ihhbi2o 208t 1yxif-3esuquce of a 100-W light bulb designed to be used in a 120-V ihiyus23 x0ftuh 1i o 5be8-q2circuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its herl(iy:s4v 1 stn.3anep:1tf bating elemen sv rf bl3ty1p1( east:4n:.nit?

  A 200-W resistor is rated i5 abt/we1t ;aat $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is ra6 i(zylv4a5yt)czw 7v*gla61 p d+bmyted at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is u/ 5x,vtuxlb (dsed at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it is used at 120 V, what is its resistan 9h)2sva, le)rvovoy, ce?

  A 25-W soldering iron runs z3b*+cxi6sg . k v3szlon 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if /jtv k9w(i 0 jfza-8plenergy ck8jl-(9 j/ azpvfi0w tosts $0.08/kWh?

  How much energy does a 100-W light bulb use in 8.0 ho4r cb5k2c-gy4 a4nde65cbxzuxe . 3qrurs?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much heat en13pwbvkn1w z3xpb18 e c01su nergy is produ1 wc1nn01 bb 1wp e8sxp3kz3vuced?

  A battery is rated at 12 V and q vg2vfmfvv /2 im96n w )pwd2ei2uo-,160 A-h. How much energy does the battery store?o)2 v2v f/d fng-mwp22ui6w9 mvqvie,

  How much energy does a 25-W soldering,m8jnwqh5s tnji9p wc 113)2i 7nw nep iron use in 8.0 hours?

  A 100-W driveway light bulb is ondfdm;)b+j ff 8gb91t k 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity use)9ffddtg bfk j1m ;8+bd, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus moni2hb*s yz ,x3shtor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does 3 byshsxz*h2, it cost to run the computer annually?

  The monthly (30 days) electrzah37ji3i:s xi29l( o k o2fpzic 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 m3xf7i zs ipjl9(a 2ko3:hz2iouch did these items contribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier operatege m foz4e-u77s 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 temperature 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 eleme uof7gm-e47ze nt?

  14 A of current flows throo;yg4yl5 /:l;kx 1n w;np spzzugh $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costodqp i 26fs6s6b yhte c7n.)5cs $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 rate of 2.0 hp has 60% efficiency. How lb)/5zg:a9(dnpti i n lk7f(omuch currentoi:d 5nank( 9g/l(zpf 7b) ilt does it draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What :ssb :y ir, lzf98w6dsg1n(wfrms current flows through thisfy8g w9sz,i(l1:f sbr :wdn s6 device?

  A 500-W device is connected to a 120-V ac power source. Wiivc hk +z3)g1hat peak current flows througv )ch1ikiz3 +gh this device?

  A 500-W device is connected to a 120-V ac po5(8wnfllnkk3 id fq6 :kbf8. lwer source. What is the peak voltag w6dkl3k8n bq8:f.il( flf 5kne across this device?

  The diameter of a copper wire is 0.081 inch.ft+k3,s,ax oia g d-*x The maximum 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? (T+3x g xiks-,oda*a,fthe number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)