A device that produces el, wx ,urv;m) opo9jna+ectricity by transforming chemical energy into electrical energy is c,+9,xap jur);w omvno alled a

  A car battery

  The total amount of charge that passes through a wire's full cross s 5qngt d(5f9vkection at any point per unit of time ivf9kgq t5(d5n s referred to as

  The direction of convention current isqxin 8cq4axk 7ls;x,( taken to be the direction that

  A coulomb per second is the same zim1nt5 toc6 y409tu yas

  Car batteries are rated in "amp-hours." This is a measuuyjvq*)r nt lciwy1k1 5,7o)b re of their

  The resistance of a wire ierqv0l;n 9bk0hs2 k 5is defined as

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

  The resistance of a w1z5 jm(jdlndtx31 xwn:rfo-( +-qmtnire is

  The resistivity of a wire zx kz5- w)/1;l-jvsmuc trbp+depends on

  Which conducting material has the lowest resistivity value9(i.kdur )tdg ?

  Consider two copper wires. One has twice the length of the other. How do t a,jyvy+pkly0b- :tuex+l( v 1he resistivities of these two wires compare?+vtxl,aj(yubpy+ evy :0k1-l

  Consider two copper wires. One has twice the length2x mmy7iqgp h h5. m-h4 )l8l/dypcrf; of the other. How do the resi mmxh 5ph2cigyqlfr/.78y4)lh - md;pstances of these two wires compare?

  Consider two copper wires. One has twice the cross-9xjivvh7h: lo7c kvwrbmp+07 i syt6s33 :r)g sectional area of the other. How do the resih3mi+y:v ir37vp)gt x 6ljcsw: v 9robk h077sstances of these two wires compare?

  Consider two copper wires. One has twice the length and twicvmmfxo m*)v9n0lf ed4*o)g psk-*;vz e the cross-sectional area of the other. How do the resigp)om 0)e z fls-9m*mkvf; 4 nvxd*o*vstances of these two wires compare?

  The length of a wire ikal)/( wkedg*s doubled and the radius is doubled. By what factor does )ekldgka *w/(the resistance change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cm db:6vu 1 cwli1m:pfu1h 7tvtl v.r7o5uiameter rod of the same length and made of the same mwlht11.l vf p:6 uu:5vui71vbocm7rtaterial?

  The resistivity of most9qub( ymcrj*gop 9v.2 common metals

  Negative temperature coefficients of resistivivx+a4 az5co /*p 5mejh0g ckt-ty

  What is 1 W equivalent */s c5b (bsfsy :cnio4vh/h8jto?

  A kilowatt-hour is equivalenl t7g5os e1 yohnwbw5km vj94k6)n (x17peir;t to

  If the resistance in a constant voltage circuit is doubled, the power 68mn np jcj85+)pdf)dken0ec dissipated by that circuit willc 8pn5dmj0ek +e))fn dnj c8p6

  If the voltage across a circuit o)k ybas1 l7w km swi8s:t01mp2i-q6qvf constant resistance is doubled, the power dissipated by that circuitvkm8isl wikaq)syw1m0 s1 t-b27p q:6 will

  If the resistance in a chmi8.q 1b wrml6d3lf /ircuit with constant current flowing is doubled, the power dis. 3f dwmb1lh8 lmirq/6sipated by that circuit will

  If the current flowing through a circuit of constant resistance is doubled,0bq 1;mpa1nmvh w;+ hu the power dissiq ;amwh hnm11; upbv0+pated by that circuit will

  During a power demand, the voltage output is reduced by 5.0%. pm f2*uw c8jfag e:b1h;0;srpBy what percentage is the power on a r:cjpr2w18 pmu fhae *b; gsf0;esistor affected?

  A current that is sinb,ukjbd 6*h//sanz; susoidal with respect to time is referred to as

  Consider two copper wires each carrying a current of0c;gbw /nxn-,h-s n r 7oq*sdq 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 nx qo /d-n0r*s -7g;qnsbhc,wwire is

  Materials in which the resistivity becomes essentially dkb (l(t,wj.5r 72hlpuwe j.izero at very low temperatur, ikl jw5pbu72edrwl .(h (jt.es are referred to as

  What current is flowing if 0.67 C of charge pass a point imyl6/8dq on1u j6h(qiath5bah i *t./ n 0.30 s?

  A charge of 12 C passes through an electroplating apparat2ej9tnrup5t( qic8(u blg 6n8us in 2.0 min. What is the average currentctr826ei5g(ujq bt9l8nu n(p?

  How much charge must pass by a point in 10 s for the current to be 0.50 A(pec o b;o*f:h?

  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 *o sy )eg1estz3mr5)dkzxpg1 11 ;zf k$4.0 \times 10^{16} \; electrons$ 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 1i q1j,v5m3ubep c*lsx8up; xleft on for 10 min. What is the net number of electrons that have passed through the qmus, ux;5* 8lbvcp 311 iejxpcoffee maker?

  In an electroplating process, it is desired to deposit 40 mgt odqw/x2 8jm6scl 45e 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 sil ts/je 5qowc28mlx6d 4ver? (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 throuks/ hz( d2b, k/+ do.lu0w+n*i utcswegh a resistance of 330 ( uo+ *2udbhw+ikc kwsdn//.e0,tzlsW?

  What is the voltage across a 5.0-W z.zb zg.bi 7rzwft e2hc :7rxj7 2sfj .3c*)vnresistor if the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What cuz+ls1e)50dm8ekm-j,v ei yoc cd1:t grrent will flow?

  A light bulb operating at 110 V draws 1.40 A of curreoue fknrq9n* x97; zzv5fw+vgjpy 585 nt. What is its resistance59f*vjvx gfz 9ueny;k5r57qn p o8+z w?

  A 12-V battery is connected to a 100)2 dsbcr(jq/)t;ybw 5ds3i vq-W resistor. How many electrons flow through thqy2rti5b );ddvsc) j w3s(/q be wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameters6vjy-n slq;f4*or+ aqp9i (t 0.40 inch? (The resistivittf*ql+s(riy-ns;p o v 4 j96qay of copper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0 cuq5wh )w* s ;-uvy+doxm in diameter and 45 m long, if the resistivity is vqwowydu)hs *x;-+ 5u $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire ( rn-1tyt,wks (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 wireiawa d3(nqln s 259rsx eizc7y,4 v9f)a .6vev (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 its resip-5 4wbiibs+d(r 0,u a; z;pfrh+fop3at0cyv stivity?

  Calculate the current through a 10.0-m lo h cj6cx+;+fbang 22 gauge (the radius is 0.321 mm) nichrome wire if it is connect6f h+ccjx a+;bed 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 a.,h2llx 7ygqj nd of rectangular cross-section, 1.0 cm x 2.0 cm. What is ,hqlj7.gy2 xl the voltage drop along 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 mm and a resistivi;-kg lm4jd zws*3v ;epty 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 (resistivity pgrleo0:en0 ;k0- jdm $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistance e dl;nhfrqvb nz i80jn4.e;16of $18 \Omega$ 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 coeffin3cdt-j;e1c 9mh c)3lvsy4escient 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 determine th- s5;qh6,ci erkqyqe 8e melting point of indium. The resistance of the platinum wirc i5rs,hqkq 6;8qe -eye 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 an y9q2.fq0kq n n()krb4clra /j$10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current will hgwmvkm9+ 55lit draw?

  A 150-W light bulb running on 110 V drawt)e/ 1 ig.3qhkh 8mcjls how much current?

  What is the nominal resistance of a 10ux6qvobtf ;/ 00-W light bulb designed to be used in a 120-V circuittfb ;vo /qx6u0?

  A toaster is rated 800 W at 120 V. pmm 4..h-pr * 7bhfzgq What is the resistance of its heating elemengm*rp. hbfp7- 4.qzmh t?

  A 200-W resistor is rat e*jhi)xhc-j6ed at $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is raxo5 uxyu:my+k(- :) w k(amxlqted at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, what h- w;um(f -y8,kmcq zopa2b:p current does it draw?

  A lamp uses a 150-W bulb. If it nm(/ 4bv0mbi qis used at 120 V, what is its resistance?

  A 25-W soldering iroso cf3am r.d69fgtm63n runs on 110 V. What is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if energkkgb2n +ojv5 -y cosbk5jv -n2+kgo ts $0.08/kWh?

  How much energy does a 100-W light *aoo5g-ogf,k bulb use in 8.0 hours?

  A 1500-W heater is connected to a 1200t1ak;:g j 6 eqzlo(hl-V line for 2.0 hours. How much heat energy is produg 6kq: 1ellzhoj0ta; (ced?

  A battery is rated at :kty w5jt: :az12 V and 160 A-h. How much energy does the battery store? wzak::t5jy:t

  How much energy does a9m2q)ohrs 7j g 25-W soldering iron use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assumin9 x jf+lj +(x/i7qtqi9pr j8ecg the power company charges 10 cents for each kilowatt-hour of electricity used, estimate thelt9ie j f7i+x j/8r(9jq+xpc q annual cost to operate the bulb.

  A 400-W computer (computer plus mobo6lf z1 .r:yf-ny -m7f*tx ttnitor) is turned on 8.0 hours per day. If electr7- brlmxz6 y:1f*tn-o ff y.tticity costs 10 cents per kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of running a cef p(jr6jj+ /n47eg zu+di5/b, vkueszntral 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 cents peve( ig s4+jube7z/zj , /+ 5funrpdj6kr kWh?

  The heating element in an electric5ndp3wg +x6t7 0lrupk drier operates 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 eleme3wn5x gr+du 6k7lp t0pnt?

  14 A of current flows thrd;pvzvvo uvh13a:rij9e0;77;enhks ough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costsn0cdum r1jfm / 2 o,zd(qxv:g8 $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 s1zk g( htn-j82.0 hp has 60% efficiency. How much current does it draw from a 120-V lng t(-j sh8kz1ine? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. What rms current :biol)k ;gcd/1nbn:b2tzz j7 flows through : lbbkjnz/cbn 2;o1i t:)7gdz this device?

  A 500-W device is connected to a 120-V ac power source. ow sftbp*ab3+ a ssv1;cm1 j6, What peak current flows through this devicem1a+v3b s,posfs 1 ba;t*cj6w ?

  A 500-W device is connected to a 120-V ac power source. What is the p(w*nvr61c) w5x ioh*5 r,gqvrwk ox1seak voltage across thisn5xsr( qw* wo6orr,*i v5cv 1)xwgkh1 device?

  The diameter of a copper wire is 0.081 inch. uw,5udeqf.-y 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 th-.yqe wufdu5 ,e electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)