A device that produces electrl0jn./x ;n4hf.)zi yvv dx x:ficity by transforming chemical energy into electrical h:ix4xz;dx/n fl )vv0..jynf energy is called a

  A car battery

  The total amount of charge that passes through a sgy4ny :+tmfakmsv(a1-z 0. awire's full cross section at any point per unit of time is referred to asavn4yk (z- tsm+0f1s.gyaa :m

  The direction of convention current is taken to /h; +sfa;dzjs be the direction that

  A coulomb per secondhj dg3yb l8b2jq 0nt13 is the same as

  Car batteries are rated in "amp-hours." This is a measure oh4zch b*sq/-zf their

  The resistance of a wire is definezzq+pwm h8z2*ill/ c-d as

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

  The resistance of a wire isba44xp s/y.wq p a8t4po*eq.m

  The resistivity of a wire d(13 y fpaysvy9o8t(veepends on

  Which conducting material has the lowest resistivitz.u1q zzdukm: gj1-j.y value?

  Consider two copper wirlc2oy w-acsv8 i4e.)t es. One has twice the length of the other. How do the resistivities of thoc 2lc8)vy wea4.-stiese two wires compare?

  Consider two copper wires. One has twice the v9 p5ccbn8:eslength of the other. How do the resistances of t9sn8ccbp :ve5hese two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of taw zs1a lac50;he other. How do the resists 5zal;a1aw0cances of these two wires compare?

  Consider two copper wire 4/f0a zn*dufbs. One has twice the length and twice the cross-sectional area of the other. How do the resistances of these two wires d n*fub4az f/0compare?

  The length of a wire is doubled and the radius is do2 :ri. opfx)lrubled. By what factor does to).r2lx fr ip:he resistance change?

  How much more resistance does a 1.0 cm diamete**r erjif.2w 83. zslcskzj 3d:0gukz zn5r v+r rod have compared to a 2.0 cm diameter rod of the sazs 0 u rjv l2g:r+33* sn8zj.kf.*5kwcre izdzme length and made of the same material?

  The resistivity of most coe4 8:sw*zt(q oiw*qix: rmq7x mmon metals

  Negative temperature coefficients o00. hif r3mlhuf resistivity

  What is 1 W equivalen26kl *zwy kh1 +k3n9kkgvohb3t to?

  A kilowatt-hour is equivalenp2g:zb3n+s ij*-( p jqm adoo/t to

  If the resistance in4wtu4zom;sv x( vz ywd*ih: 0xpdu507 a constant voltage circuit is doubled, the power dissipated by that circuit will 0uv: 7wzx d hpm(ti5 zuv44w0so;x*yd

  If the voltage across a circuit of constant r4h7llvbnx0y( ypup-*(d-luul,wo p 3esistance is doubled, the power dissipated by t d3l -,upoy-40uplynwu (px (vll *b7hhat circuit will

  If the resistance in a circuit with constant current6ew/ 8luctu1;yb/xntzb1f g ( flowing is doubled, the power dissipated by that cir (f16ut//ybtxg1;ucb 8l ewzncuit will

  If the current flowing through a circuit of connp 94 k8e/njl z;sw 6jsn ru0l9vlp13ostant resistance is doubled, the power dissipatjw6zjo/l39rvnp8 ussn l;1pl4k09n e ed by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. By what pevd,lv1e*4hv xrcentage dxhel*4v1 ,vv is the power on a resistor affected?

  A current that is sinusoidal with respect to t *ezpy+*-xg3a1 p8zc/ ip irpcime is referred to as

  Consider two copper wires each ctz xac;.,vlu a9z)s-j ziaz+/f5 exj,arrying 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 /tv iszc-a.,fje 9xz ljza; u5a+,z)x to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zero 9 roffk d.k ,6stfh91iat very low temperatures arrk19f, ofsh dfk i9t.6e referred to as

  What current is flowing if 0.67 C o p3stzkq8q+z)viw ,1pf charge pass a point in 0.30 s?

  A charge of 12 C passes through an elec64tc ;mbua: +fr/)p:qihlct ftroplating apparatus in 2.0 min. What is the averagmu t)l+c:qt4; fh:afb 6/pcri e current?

  How much charge must pass by a point in 10 s for the current lt 7l d(b +uenz gu/hby0y,su.j-h8z4 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 flowv5,j clmsngi )hyat7-7fy/7q ing 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 13.5 A w3- ag(ytk1dg*5x u.w skgg4p of current, has been left on for 10 min. What is the net number of electrons that have passed 1g-tgkg(4wa.sk3ud x5 p*ygw through the coffee maker?

  In an electroplating process, it y)j:+xtwol ,wwvu5o.d j./*hre jb6sis desired to deposit 40 mg of silver on a metal part by using a current of 2.0 A. How long muj) wuot,xh5*rbsl 6j v.: w.dw+e/yoj st 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 requg),je /q(lleb2x c7wntiv p)0ired to cause 4.00 A to flow through a resistance of 330 W?lw,tbex/) n 2jg) ciel(0q7pv

  What is the voltage across a 5.0-W resistor if the current through m(nxt ,/bi,dl it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What cur/hv cci71 j6*hgey 0larent will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resis 2i4npz pi j94nxe8+ l yn7jdf74dyu*mtance?x 47ju4*7zj+ 42ipf ny nmeinylp89 dd

  A 12-V battery is connected to a 100-W resistor. How many electrons flow thra eav.1*didcwza4 n4( ough tz da4a1 c4i*vnd.e( awhe wire in
1.0 min?

  What is the resistance of 1.0 m coppepw-ux,g, a5vdr wire of diameter 0.40 inch? (The resistivity of copper is a,uwxgp 5v-d, $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter and 45 jfto**ks( d dd.4qw )oznu-5 bm long, if the renqs(d*j5zobuko4f)-dt d. *w sistivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (re)movwth;r0/4k / hux gsistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire8w69j -ae4x 8i+jd2 ;go)xnrwemxr wb (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 5xm +z3tq*dpn(v)fvzec (eo(ohms. What is its resistivity?

  Calculate the current through a 10.0-m lonpic9v .2it pa8g 22 gauge (the radius is 0.321 mm) nichrome wire if it it9iicv2 a.pp 8s 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 and of rectangular cox/3gcwl19 xy9-zd r l a.ak*zross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The oyca lz.r *z9 1dgxx3lk9/a w-resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)

  A 1.0-m length of nichrome wire.augt)s r3g.e 7ael*p 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 (resistiviojqv5n37f ay* b79/rg5b3a gqin,zhwty $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistancbfamp-, e9vu-8:lnu g e 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 resistiveo) xc7i2a1 1(gpmkb kop3xg4ity 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 determine the melting pp y jt98muwzig9cj+2xv-s0d +oint of indium. The resistance of the platinum wire is 9mpiv+jgd y +9xusj -wc82z t0$2.000 \; \Omega$ 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 throughnxgvv:m; alh0;dr/ ; a an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. Wh )wm jo+n2tphgmwb+8etu-e(9 at current will it draw?

  A 150-W light bulb running on 110 V draws how much cu kh hf,wmup-9s8s(r uw* i5-ick;qp+wrrent?

  What is the nominal resistanc 9is-:/dyjlg knsptl z9m k/2*e of a 100-W light bulb designed to be used in a 120s sd2l 9gk ln9*k/ :/tzj-pyim-V circuit?

  A toaster is rated 800 W at 120 V. What is the resistance of its heating elev3*qoh 77eb ip;/trm* (l3 ksu ffdlw2men uq2fw *o77plilbr( vk s3/em3;* tfdht?

  A 200-W resistor is rated at vqh/jr::lpwj t *)5-a:hbx ;pjyhd* u$1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rattx*u 8leq1via/ 8 gv;led at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what 1iz0w ndg3l m8 8 lp3opu8 :hbi1c7dkjcurrent does it draw?

  A lamp uses a 150-W bulb. If i3rqyr83t wianh o9g+96fxfevn,k m 9+t is used at 120 V, what is its resistance?

  A 25-W soldering iron runsvfsdd 0 ntcpv ..15d)tb87 pfq on 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if energb7i)li0 1gs1 bmg0eqjt.9lv gy costs i9100js lg.gb)eqmlv7bit g1$0.08/kWh?

  How much energy does a 100-W light bulb use in 80- rf zbw5sm; 59esj)wwjzap i ;(4nqo.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How m ;;vfkqx/txcz9 8bc 0nuch heat energy is prod znxfckv8qbct/ x90;;uced?

  A battery is rated at 12 V and 160 A-h. How much b4/9n3cds+tdunt y u6energy does the battery store?6nd9/ud y3+4 tbcutsn

  How much energy does a 25-W soldering iron bnyb:wz/z +aw/0zp8j use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Asw 1x8 (yl.*n bwna*jeusuming the power company charges 108ubn*1jeay.x*w( w nl cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus m 05,hfhm j5-gazo+p-*biye1p8qx jfg onitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer ajgx,-bp ip0gy *ff qj+8mez551h h ao-nnually?

  The monthly (30 days) electric bill includediho c + h,u* *my;nxw1wwq,9.vfawbr, 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 contribute to the cost of the monthly electric bill if electricity costs 8mf *.b u nw1wvc*h;xw9,, rq+woyh,ia.0 cents per kWh?

  The heating element in an electric drier operates on 240 V and v e4omc38 5ogjk vvo))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 haveog o vv)vj e4cm)k538o on the power dissipated in the heating element?

  14 A of current flows-g7i7p3sf( +grbc cpb through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costdla by.cb27h8s $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 wo ptomp e3(dn72rk at the rate of 2.0 hp has 60% efficiency. How much current does it 7(dpnm2to pe3draw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms currenttnqps :xqirau:*/( up*n d-l2 flows through this devicei-/d uqn(altn *r *:2xp sp:uq?

  A 500-W device is connec-ce* t5zm-ushted to a 120-V ac power source. What peak current flows th*zem- cu-t hs5rough this device?

  A 500-W device is connected to a 120-Vm ocd9 lj1g-4g ac power source. What is the peak voltage across log1 j4gc-9md this device?

  The diameter of a copper wire is 0.081 inch. l r. 4lnplz(:;i+nr xzThe maximum safe current it can car;l:ix lp z.nlzrn(4+r ry (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 of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)