A device that produces electricity by t;4h r*3cwv annransforming chemical energy into electricalnac3r;v4h w* n energy is called a

  A car battery

  The total amount of charge that 3/lde njwa.s- passes through a wire's full cross section at any point per unit oanwj.le 3d-/s f time is referred to as

  The direction of convention current is taken to be the dir ,8e9j/vyf1gy ooz )9y zagk;mection that

  A coulomb per second is the sam9 gmo f/n,:jk,)hy( cva *naqxe as

  Car batteries are rated in "amp-hours." This is a measure of iev;u6+ y+uqpbup) 1q their

  The resistance of a wireiw:v6wz 9ii:z is defined as

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

  The resistance of a wi .+,ztwxyuu) m x6gk+cre is

  The resistivity of a wi hx e:+iepz9 5 2eck9j2st6obire depends on

  Which conducting material has the lowest resistivity va/i+;ozyw l af(lue?

  Consider two copper wires. ehz hmu- nwasl7q .(4t. mk9e5 One has twice the length of the other. How do the resistivities o4hu.z nht7-em9(ma.ew sl 5kqf these two wires compare?

  Consider two copper wires. One has twice the length of the other.2(lqthwwd4 d2 msn 0h) How do the resistances of 2(wlqdd)t0 h2n4 shmwthese two wires compare?

  Consider two copper wires. One has twice the cross-sect vhd : c3n)ydpp8kakfx; 1e;5xional area of the other. How do the resistanca pd)c51e dxhk:f8;ynv ;kxp3es of these two wires compare?

  Consider two copper wires. One has twice the lengty2 , o;x)tuq3lvksogo.ff)n 5h and twice the cross-sectional area of the other. How ,y.);fxn l ogo)u2v3k t5qfso do the resistances of these two wires compare?

  The length of a wire is doubled and the radius i dbaxb +5 f7k)9of4hnxs doubled. By what factor does the resistanxn4 d+ohx 75ffa)kbb 9ce change?

  How much more resistance does a 1.0 cm diameter rod have comparebm-2dj p,wb:dd to a 2.0 cm diameter rod of the same lengtbbw2: ,-jmdp dh and made of the same material?

  The resistivity of most ck ;;mine/oy,yq:hm7fqf92 t 2zm7tu,gnkel* ommon metals

  Negative temperature coefficients ln6r ;geq.( spof resistivity

  What is 1 W equivalent5b 6xjjt d8t-pfsc1 /f to?

  A kilowatt-hour is equiv( ,fx h22evyc b*u4kasalent to

  If the resistance in a constant voqirrh3ljtxs,h(g 5 6d2 pc63y ltage circuit is doubled, the power dissipated by that circuit willy c6qs23li3 g 5r6r,thd(jxhp

  If the voltage across a circuit of constant resistance is doubled, t/ hjc z2t;tce:he power dissipated by that circuitct;jct2zh/ e: will

  If the resistance in a circuitv8,m epo)1 vvf with constant current flowing is doubled, the power dissipated by tha1 vme8, of)vvpt circuit will

  If the current flowing through a circuit of c-w 9v+gvedf07pn5q al shs5/ jonstant resistance is doubled, the power dissipated by /nf9ase5+v vsgwl 075dq ph-j that circuit will

  During a power demand, the voltage output is reduced by 5.0%. By whvflrez g5s)9gu / q.:pat percentage is the power on a p)rsz5ufq :ge.9vg/ l resistor affected?

  A current that is sinusoidal with respec*4y )jlr+rd ojt to time is referred to as

  Consider two copper wires each aaty0/bym7 a2x6ji ntmk23agd-*vs/op3 5uy carrying a current of 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 the larger diameter wireya25dbu njvk/*6o27syit p3t 3 x /my-gmaa0a is

  Materials in which tkm1d k,qq5-r) u5uunw p b6/nthe resistivity becomes essentially zero at very low temperatures are rtq1p d/u5w ,-u5nbm6n)krkuqeferred to as

  What current is flowing if 0.67 C of charge pass a point in 0.o u6um- 68 rall9qo;ev30 s?

  A charge of 12 C passes through au sgr45-yw4 jnm)9rg (fr.iwbn electroplating apparatus in 2.0 min. What is the average curr f5i m4rr 4ggb)ujr y-9wn.w(sent?

  How much charge must pass by a point in 10 s for the cur,7; y iuvdq/(0xtmtu irent 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 if9uk: a9*hjdfi $4.0 \times 10^{16} \; electrons$ 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 13.5 A of curre7+g m kgr,dr1int, has been left on for 10 min. What is the net number of electrons that have passed through the cofkir1 , g+rdmg7fee maker?

  In an electroplating process, it is desired to deposit 40 mg ofuze*+ qb.; g 6nukl9cw silver on a metal part by using a current of 2.0 A. How lb +;eul*u6zq gn.9k wcong 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 required to cause 4.00 A to flow throug vq7y1s t, -kql+lgmb1h a resistance of 330 W sq17k+ qglt,m-lyb1v?

  What is the voltage across e3 qqlgp .7* a)l9f jfzw7ls(.0lmgus a 5.0-W resistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V.qx6i.l p 8 gadza3j9k9 What current will flow?

  A light bulb operating at 110 V draws qjev.h;ob6o6;:r lih 1.40 A of current. What is its resistanceq;oev6 ; ihlbr:.6hoj ?

  A 12-V battery is connected to a 100-W resistor. How many teu:tr ix-eqs. 0fg qiq 2169welectrons flow throughwi. 6 :ftsxetq90 qie-g21urq the wire in
1.0 min?

  What is the resistance of 1.0 m copper,w8g 4s l57bvlyma b(a wire of diameter 0.40 inch? (The resistivity oa5lvb7g4bs(wl,y m 8 af 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 long, .ks954 jrrwais1v h(yif the resistivity is k41s s9yria(h. w5rjv $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper vxk vh;rh-7h9.6bcmd 1hct6w wire (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resistidmbirxp9 i0 iz+ f.9m8vity $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 its resc q x5x0-xl;i;yok1pd istivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is 0mu )qx4 oxt7yv7 wee 832g9gr9bqgrt1.321 mm) nichrome wire if it is con yxbve9qgw9x13u)g rr o2g8t 7qe tm47nected 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 and of rectangular crosq(pm6loxe6 hi.m i1 b2s-section, 1.0 cm x 2.0 cm. What is the voltage drop alonq2ipo.(6xb6l iemh 1m g its 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 op x/wp/(ixj2 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 (resistiviq8au/qxsu2s9a f rdr(w58cera wam c )/j856yty $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a req)xx 3d;xojmix6 /g3dlwu 2f ,sistance 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 coeffi5lb5sr +,qcn icient of resistivity of 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 dety8qm)whf x8l+5(dnw xermine the melting point of indium. The resistance of the platinum(d+8ww nh5m )l y8qfxx 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 throupu( gyp3r)0k /8;ej2 ojxv. k qsys;qqgh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200g54ea xes ,qj:-h*uf .djo ol0 W. What current will it draw?

  A 150-W light bulb running0l91foz 4pkzh on 110 V draws how much current?

  What is the nominal resistance of a 100-W light bulb designed q cy 38cnc7z*ypmfs* irh;1*eto be used in a 120-V y1q*rn*mc8ph fc7i*;z 3yesccircuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating ejli8t0 y *(w0muroi )1xur)ujlement?y)ltu(jw8uxj) 0*ro r 0mii1u

  A 200-W resistor is rated a v/p0htt i8le5 dhwd6(t $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at z2 uu./ykaef2$1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 -p4m/dl8wxq nV, what current does it draw?

  A lamp uses a 150-W bulb. If it is used att pnhf ,(,y0 15fiv (sak:twwi 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resistance?g)b8ij7jy6 n/ e.hksx

  How much does it cost to op) rift; vv8s0 osiwt*(erate a 25-W soldering iron for 8.0 hours, if energy cost0o wtvs*s8 t(vi; ir)fs $0.08/kWh?

  How much energy does a 1,5)llu9a:sruec ; mn,n ti;ra 00-W light bulb use in 8.0 hours?

  A 1500-W heater is connected to a 12038v /mk)nzpaaki s95cy d1 u)k 2(peqj-V line for 2.0 hours. How much heat energcvm ie )kpz8yna( 9/uak)5dp21k3jsqy is produced?

  A battery is rated at 12 V and 160 A-0fl0c8*ab91k)e oe 9g0 ftrm jh cowe.h. How much energy does the battery store?*9aecokml 9fh80w1co0t0jr fe .) ebg

  How much energy does a 25-W soldering ir/se.pup+ ew;rf w,/z8g 4mwcaon use in 8.0 hours?

  A 100-W driveway light winr+jo ert1o 0f16,lbulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the an+oflji 0 , 6nr1woert1nual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If eliolkivegj 3o6n4l 64eq5l:4eectricity costs 10 cents per kWh, how much does it cost to run th ee44l oei64k5lovj6q ni 3:gle computer annually?

  The monthly (30 days) electric bill included the cost of ru fvu1 z)w1t3+ cyv8nrwnning a central air-conditioning uni +n11u8wvzycvrw)3 tf t 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 contribute to the cost of the monthly electric bill if electricity costs 8.0 cents per kWh?

  The heating element in an electric drier operatz4di 6gk/hg+ ces 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 powehi6 +/kc4ggd zr dissipated in the heating element?

  14 A of current flows through vfgy+ /z61(flj .9a (rmyrrek$8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs c20uz39 ip8so/ z 5*be wizuyo$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 k-+ hc5qwhbb+the rate of 2.0 hp has 60% efficiency. How much current does it draw from a 120b+hb5k+c- hqw -V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac gmznr-4e2x +n power source. What rms current flows txnen+4 mgrz- 2hrough this device?

  A 500-W device is connected to a 120-V ac power source. W)ad31adikb :q hat peak current flows througbq di13a:d )akh this device?

  A 500-W device is connected to a 120-V ac power source. What is the peak volty*tl oh(fma/c/j-zfj -k1 v a(age ac(-lk fhfv ac zj*1m/tjy(-/oaross this device?

  The diameter of a copper wire is 0.0x7-)8wtl gv hq81 inch. The maximum safe current it can carry (in order to prevent fire danger in building construction) is 20 A. At thi78w )h qg-lvtxs current, what is the drift velocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)