A device that produces electricity by transforming che ,u mx g,46h4ggvqjo0amical energy into electricvmj o4,,g6ggu04axh qal energy is called a

  A car battery

  The total amount of charge that passes through a wire's full cross svt(fc9ypucdh1(q+ ( e ection at any point per unit of time is referhupcf+(y e1(vdc( t9qred to as

  The direction of convention current i7)f 6 lhthk98hb v(ptrdf8cv (s taken to be the direction that

  A coulomb per second is th9zaj+;im s;/n ari3n ve same as

  Car batteries are rated in "amp-hours." This is a measurcjl ,ush5uu6abc(mfcz *st., ),bka;e of their

  The resistance of a wire is defined:3tc9d f mto-m as

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

  The resistance of a wire isgmb3s7bb s ma9x33 ic2

  The resistivity of a n,towfny39,wor(qz )2rx7cl wire depends on

  Which conducting material has the lowmpy3 uh(k 5tb:mi1 k+nest resistivity value?

  Consider two copper wires. One y0cijd -:.uw2 pxh sl4has twice the length of the other. How do the resistivities of these two wires comp jc 0:4 w-h2slxiyupd.are?

  Consider two copper wires. On*r3y km me;h:be has twice the length of the other. How do the resistances of these 3*m:;ehykrbmtwo wires compare?

  Consider two copper wires. One has twice the cross-secti/z7 s k:tv;jftf wy0ln(( m2aeonal area of the other. How do the resistances of these two wires comp(s/ lz ;0tt7knm: afv(f2jewyare?

  Consider two copper wires. One has twice the lengthrt-bkb2pp t0nas . :z; and twice the cross-sectional area ons -r akbppz;t.2:b0tf the other. How do the resistances of these two wires compare?

  The length of a wire is doubled and the radius iw(2fg c*su zv;d *u 6j5xt9.b habgc(hs doubled. By what factor does ; gh c hxbd 25(abc*(gv*swztf.j96uuthe resistance change?

  How much more resistance does a 1.0 cm diameter roa3 kbmcf,m 5ylsq(/ y*d have compared to a 2.0 cm diameter rod o c msq*b5/yla 3(f,mkyf the same length and made of the same material?

  The resistivity of most common mehsiqnx0 k 1 upih3;astnz5cfi.)+q) 5tals

  Negative temperature coefficients of resisfc+qy yvswi;su1eml0) +s2o/ tivity

  What is 1 W equivalent tunae,tn5l:+r)-*uad:s sxlx d1 wlr,o?

  A kilowatt-hour is equivalent totxu v 7in,0c(v

  If the resistance in a constant voe u:akl+h lj *)*c:slhltage circuit is doubled, the power dissipated by that circuitcs*a e*:l kul)lj h+h: will

  If the voltage across a ci;: sm-jy o )vglz .zcu3 wmwy+0cpw0b(rcuit of constant resistance is doubled, the power dissipated by that c(z; )jowz0 u pwlbm30-y+: mvg wc.sycircuit will

  If the resistance in a circuit with constant curq;)m q -mz6he4ftf;,cg+ emkerent flowing is doubled, the power dissipated by that ci mt6ekmg;ezm+,h q 4eq -;f)fcrcuit will

  If the current flowing through ;r( 0vtejfcc29ubsm 0ku:6:)ceujmt a circuit of constant resistance is doubled, the poweb v: ku )92ejt t0c:;( scfj0u6rmuemcr dissipated by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. By wha okv*9 :alwro n2 f3uno83dzblf2z ,i,t percentage is the poo,2 ba ,lwr3 :kfn ulizd2vn39f8oz *ower on a resistor affected?

  A current that is sinusoidal with respect to time is /vxts1m ny p)k gyw5ed+-voc(:mdip8281oydreferred to as

  Consider two copper wires each carrying a cur3hi;sdk9 (nas 4t t3zzrent of 3.0 A. One wire has twice the diameter of the other. The ratio of the drift velocity in the smaller dza (n3ik4sdz9 tsh 3t;iameter wire to that in the larger diameter wire is

  Materials in which the resistivity becomes essentially zepj nw3) vp)of+ro at very low temperatures are referred to asv+3 onpjp)w) f

  What current is flowing if 0.67 C of charge pass a point in 0.30 0r(c6lz 2+oeek,xxey s?

  A charge of 12 C passes through an electroplating apparatus in ah,bn qh7177tes -w 9hx)jkzf 2.0 min. What is the average curre7z9jae b fnwqh, xts717kh-h)nt?

  How much charge must passf* 3qs/lwecy7x6 g2ln 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 flowingv,xa*k+y daan7 g6e +k 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 of current, has been l)a5 t34t( m3pefaase 0s1o q(qq eob)neft on for 10 min. What is the net number of electrons that haoq 5(a)3e)(b3q0 q o astn4em1aep tfsve passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silver on a mqqq)bj(,rk 4fetal part by using a current of 2.0 A. How long must the current be allowed to b r,)qqq4(kjfrun 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 ca j gx5ax;j6h+8cavl*-t z xh)xuse 4.00 A to flow through a resistance of 3tgj6c5j;x-zx hh+v8 a lxx*a )30 W?

  What is the voltage across a 5.0-W resit:s/z5 fqwck8 n5byn :stor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What cshl5 dfr/s noe7b-b i/w56 f)yurrent will flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its+9)(+ ahlid gyraeop- resistance?gi9++elod(a pry- )a h

  A 12-V battery is connected to a 100-W resistoro(q. gt *sr;qv. How many electrons flow through the*q;orv(t gs.q wire in
1.0 min?

  What is the resistance of 1.0 m cop u5czmxagv0(06xf-y y cb wtbc-b*v*+per wire of diameter 0.40 inch? (The resistivity of copper isa wvu m--ygb (6z*ccf*vx+0t5c0ybxb $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cm in diameter aqm.7 to+x 9lr wlm/b/and 45 m long, if the resilmw7 9arm/.o /l bxtq+stivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wirez j c l g6aowsz;5bx62d xu20z831tpgk (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 a8v1)m5wey9p+ yq ogj wire (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 09jrzt2m :inwn*cvzhq 6k653cbxe; -g .040 ohms. What is its resistivity?

  Calculate the current through a 10.0-m long 22 gauge (the radius is i 3yubpd4- jynilc+ck )2l.w ;0.321 mm) nichrome wire if it is connected to a 12.0-V batti.lkcj -4n+23 iyupc ly;db)wery. (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, 1.0 cm x 0i*zhp r8+yfl2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The re+l8z0p ry ihf*sistivity 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 aw n(5ghib jox(- t+opu o2p+e8 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 wifh( 2:;lzxfcz,to c +ure (resistivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has abhgh*g,fi *pe :w*kf* 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 vt 2ns0 2ec2 (kdgsn6sof 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 meltrb()zykd) 8n ,n hzyyz ;x7(p)4m 03kilwjsx iing point of indium. The resistance of the platinum wire z ywp4jh zbi7n)0x;,xdik8rmz(synk) )(ly 3 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 throu )9 r-cpyrcqx-gh an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1c:c,3eozp b .f200 W. What current will it draw?

  A 150-W light bulb running on 11vi-xe h4amx;er9 x:i7;ai f97mz)rql0 V draws how much current?

  What is the nominal resistance of a uwu/irxd9obu n) 1;a nm6l 19ixny5k1 100-W light bulb designed to be used in a 120-V circuit?m;w1 nubxxruk oiy6n19)i9nl /1 a d5u

  A toaster is rated 800 W at 120 V. What is the resistance of its heating eufbo0)gxb4 q b6bo z)+lement? bb q)g4xbu0)z+oo6fb

  A 200-W resistor is rated atx5m48 gcz t3ym-bv7mjya7w) e $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated al;72 02w 2lsooihdqwjt $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it . )exu l0z/otpis used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. If it isk .0 zuvthz 7;o3,hla;1 ajafzv4chhi 2s10ie used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resistance9z9 c(cj4crxb,ul3 t m?

  How much does it cost to operate a 25-W soldering iron for 8.0 hou jksy 8ks*.b-frs, if energy c8 syb.k *-jskfosts $0.08/kWh?

  How much energy does a 100-W light by aebqy covq6g+/i,) 7ulb use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line formo5ir* *p al(*s jn.nz 2.0 hours. How much heat energso**5imprzl n* .jn(a y is produced?

  A battery is rated at 12 V and 160 A-hmi//ls+klu2uk/wny aw l8j3i1el d*7 . How much energy does the battery store?*uillw dmn w82/ +s7jial1/ky/kleu3

  How much energy does a 25-W soldering iron use in 8.0 hours?5i.*xda: hmp ;ksqn+b

  A 100-W driveway light bulb is on 10 hou5+ lmrb9lq 5tyrs per day. Assuming the power company charges 10 cents foblml r qy9+t55r each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turne/pwm7phqsk x) o+ -;a*cl g5etd on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run)c; qt7kop*h5we pla -xsm/g+ the computer annually?

  The monthly (30 days) electric bill incl6m4j/s, r)mgkzb: tvs uded 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 8.0 cenb,smgmj4tz/rs )6k: v ts per kWh?

  The heating element l,h847tqqnjo7 zs ky,in an electric drier operates on 240 V and generates heat at the rate of 2.1 kW. The heating element shok8nqzj qt7, ho74s ly,rts 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 element?

  14 A of current flows thr25il l9m8gpbh fl1k 7* +wrsieough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery cost.auvjam9oh.(0m m ,2esj8a r ys $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 much 2j jbovfyqch89:vp1 y 2el64k current does it djh 2yloq6e14pyv f2bj 8v:kc 9raw from a 120-V line? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current flows e;fnegt -;dj ,through thisefn,j t;e -g;d device?

  A 500-W device is connected to a 120-V ac power source. What peak current fld y ;m+wbyw1dx;xc3+h ows through thiswhd d+x ywb;3m+x1yc; device?

  A 500-W device is connected to an 0kcd: 8h s9pthet74u 120-V ac power source. What is the peak voltage acsk9:e uht p4htn7c8d0ross this device?

  The diameter of a copper wire is 0.081 i,sr6c41py3xi bd74r pss d:vmnch. The maximum safe current it can carry (insix:sb4p r 1 4rdm cs,6y3pvd7 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 $8.5 \times 10^{22}$.)