A device that produces electricity by transforming chemical ene;t, o -mwsd*sr -xtp)rrgy into electrical essrm--op)r ,ttxw*; dnergy is called a

  A car battery

  The total amount of charge that passes through q1wk.ze .x-fhw.atx 3a wire's full cross section at any point pew-1tefakx.xq3. z wh .r unit of time is referred to as

  The direction of convention current is taken to beuz*k /*tbs) sy the direction that

  A coulomb per second io/ )dwrn1te9ts the same as

  Car batteries are rated in "amp-hours." This is a measz)it5 +uhnv6b d 7afe7ure of their

  The resistance of a wsbfa/la rs)m;pc+ , mr ,fv02jire is defined as

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

  The resistance of a wihvtr5cu6 * 12 ,2myo5ncddtpo re is

  The resistivity of a wire deole33l2 hid jiy-k */fpends on

  Which conducting matergm x 4x yt/3l/ n+fswf/0aq:hbi3y4id ial has the lowest resistivity value?

  Consider two copper wires. One has twice the length of the other. / 0mn(h cn,smyw9 ffg2 How do the resistivities ofmfynsw, hf/0(gn 9c2m these two wires compare?

  Consider two copper wires. One has twice the length of the other. How do t:4t,grs aw: e,zm guc+nel/ :ahe resistances o a:, ,amrszlc4t:/n+ggw e :euf these two wires compare?

  Consider two copper wires. One has twice the cross-sectional area of gs7ct w/a084jv fv9c2e-n xk tthe other. How dc / fgjaxvt9 e7w2c4- 0sk8vtno the resistances of these two wires compare?

  Consider two copper wires. 9adtbwd* w1x2One has twice the length and twice the cross-sectional area of the other. How do the resistances of these twowawb*dd1 t9x 2 wires compare?

  The length of a wire is doubledx(4kkxw2 3 hql and the radius is doubled. By what factor does the resistancwx32l4x hkq( ke change?

  How much more resistance does a 1.0 cm diameter rod have compared to a 2.0z h ri43nwvvq ,g1bi99 cm diameter rod of the same l1hvvb4rg9ziqn93w i , ength and made of the same material?

  The resistivity of most com fjtxy8l*c ( *scqkd)j g)2oq5mon metals

  Negative temperature coefficih qqkgl e15z(+ents of resistivity

  What is 1 W equivalentdiboe* v*5l*w to?

  A kilowatt-hour is eqgih)syf 65uco e( xjj/d b.;c2uivalent to

  If the resistance in a constant volt c.yj,0roe*7 zwj2qb lage circuit is doubled, the power dissipated by that c zo jr w*c7jb,02l.yeqircuit will

  If the voltage across a circuit of constoynh +. i/7u l)usubd/bb pi-2ant resistance is doubled, the power dissipated by t)huyo bpsl+bi nu b/u2d7-. i/hat circuit will

  If the resistance in a circuit with constant cu bi0l zq (8-n ozt/i:/kkt)x s5uz7gifrrent flowing is doubled, the power dissipated by thiu/q :k gtt- s /n( zfzx7b8k)ioz50liat circuit will

  If the current flowing through a circuit of h *eu-,qoj,yrqz :d u3constant resistance is doubled, the pr:3,ejhozu q,yuqd- *ower dissipated by that circuit will

  During a power demand, the voltage output is reduhb 01l de8nqefdb2 *d1 z93dsmced by 5.0%. By what percentage is the power on a resistor affected?0e3291mbf qed8dhszd 1bdn l*

  A current that is sinusoidal with )hcf6x;/ azdqgb p* b7respect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. One wire u ag8jjj/j o :467:wcgfs7wr ihas twice the diameter of the other. g:cf7ujs 7j a/io4:w6 gjrwj8The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the r4gz vjycrh3cw+gg0.7 xh n/x4esistivity becomes essentially zero at very low temperatures aw. c4vxg/ 0zg y g7hjx34chn+rre referred to as

  What current is flowing if 0.67 C of chargejh-t49v9b*t wjj f3c v pass a point in 0.30 s?

  A charge of 12 C passes through an electroplating apparatus in 2.0 min. What (s3cd2 vlgah j6szd- /v7ps4ris the average c2vdd4h/( pj gs76z3 a-lssc rvurrent?

  How much charge must pass by a point in 10 82cbt a/i.hzls 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 flowing if l mu br1.h+6bj(av* ce$4.0 \times 10^{16} \; electrons$ 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 o ,;xa wxk6yry+3/m:vcjf*ocl/9d otq f current, has been left on for 10 min. What is tra lxk9+co;qx6md*f j/o:/v 3ywcy t,he net number of electrons that have passed through the coffee maker?

  In an electroplating process, it is desired to deposit 40 mg of silvergilo-uuu wpr,uu 2 )+ ddqf8,6 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 silver? (The silver ions are singly chargei2odwfpu86 )lu,+uudu q g-r,d, and the atomic weight of silver is 108.)

  What potential difference is ;d 7ifapd5lyna )a+0hv) lda7required to cause 4.00 A to flow through a resistance of 330 d aid 0a5)vd)h77 laylna+;fp W?

  What is the voltage across a 5.0-W resistor if the current through it is 5r r18q ,y0 ee+olv+hfl.0 A?

  A 4000-W resistor is ci) mbdil2jc r32v c*z l41sem0onnected across 220 V. What current will flow?

  A light bulb operating at 110 V draw2v /wpizrv5o-s 1.40 A of current. What is its resistance? oz2/5vwir-p v

  A 12-V battery is connected to a 100ack 9*z 5ifqp ib goy1aa3t-vi*2b6w8-W resistor. How many electrons flow through the wire a1 96i532q8btfb viwcyg*pk* a- ozai in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? (2ns8; f1jewf*xvb9i tThe resistivity of ib9f;efn*ws2 x v 81jtcopper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a circular rod 1.0w;9in260ry wjgw ng :d cm in diameter and 45 m long, if the resis:n d0j;9w2rw6wgngyi tivity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of copper wire (resistivit h9*oij-ww.lwy $1.68 \times 10^{-8} \; \Omega \cdot m$) of diameter 0.15 mm is needed for a total resistance of $15 \; \Omega$?

  A 120-m long copper wire (resishlfv0jn (p6n8yb g9+w tivity $1.68 \times 10^{-8} \; \Omega \cdot m$) has resistance $6.0 \; \Omega$. What is the diameter of the wire?

  A 1.5-cm square rod, 4.0 m long, measures 8.cy u2ygx dlbfzgb z/zw7/c f9rp+(;0.040 ohms. What is its resistivity?

  Calculate the current throug2 hwb;c8pj o .ojgh9u,h a 10.0-m long 22 gauge (the radius is 0.321 mm) nichrome wire if it is connected to j.j2p8,hoboh w;guc 9a 12.0-V battery. (The resistivity of nichrome is $100 \times 10^{-8} \; \Omega \cdot m$.)

  A heavy bus bar is 20 0ggx gokwx 5/d*ys/.2ykpu: ocm long and of rectangular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of cop p/gk0 5*uxsw2dy:goo yx./kgper 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.+qac q6f28g5el*fxp eq :czl 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 (resist.8bhr .akpe d1ivity $1.68 \times 10^{-8} \; \Omega \cdot m$) carries a current of 15 A. What is the potential difference between two points 100 m apart?

  A carbon resistor has a resistan8f7ov3f(6amn ;y4bt+ytdt sr 6 fgj/nce 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 res a skp5m d-z(eh4i6rpe8k x2(mistivity 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 point of indium. The resistjzvn dgvv+*2 y0ce5nmx7v/, mance of the zyd jen52vv7/vc+mxv m0 ng*, platinum 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 thrv aj:. v3yu(y)9sqcb yough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated at 1200 W. What current wi l v+8fvhuclev1r3 a0nx z+q+/ll it draw?

  A 150-W light bulb running on 110 Vh hg.2r(nlx43ymy.reu/y 9j f;tkj:ewja s 25 draws how much current?

  What is the nominal resistance of a 10jw 9re ,x )0/dohc2 tm,1da9cjzc9s zm0-W light bulb designed to be used in a 120-V ci m2)dd/r,zchce j9x9 1 ,a otjzc0mw9srcuit?

  A toaster is rated 800 W at 120 V. What gxcn c:t1l3k2is the resistance of its heating element?c2:x1 cgkn3t l

  A 200-W resistor is rated at gvt8o21rz f i1$1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rated at o,p,si;gs.ce $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it o.d )gdea 8zr(rtltf24.:9hb-l xgfdis used at 120 V, what current does it draw?

  A lamp uses a 150-W bulb. .pxi .y-zoin l; ose45If it is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. Whaom8 )ce/iz- gat is its resistance?

  How much does it cost to operate a 25-W soldering iron for 8.0 hours, if en7 pla78crjbx9 ergy costs c xrb77j8alp9$0.08/kWh?

  How much energy does a 100-W light bulb7u7+76luli)u r+va1s xq3o .ycz t ifn use in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How m2mar6oz(+n hkuch heat energy is ahk6(o+rm2 nz produced?

  A battery is rated at 12 V and 160 A-h. How much energyal8n7c2 cili 0i *;vly does the battery store?2v8ic ;ay ilci*n0l7l

  How much energy does a 25-W solder:cz2w3b l/ lqx mzliy9;- dy.;7*jms-jmt gtjing iron use in 8.0 hours?

  A 100-W driveway light o( 2by5k 0nk7m2qoy qzbulb is on 10 hours per day. Assuming the power company charges 10 cents for each kil qm2(nq0k72yb koyoz5owatt-hour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. g*pgw7qk7yk 7a p k3t 5z,9sdkIf electricity costs 10 cents pd gy93*s akpw,5g kptk7kz7q7er kWh, how much does it cost to run the computer annually?

  The monthly (30 days) electric bill included the cost of ru98 jgb,2e ufj7lwt/ysnning 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 ej/9y,js 7fg2u 8btlw 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 operates on y(8xv :qorpx- 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 p( o8vx:yqr- xwire 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 flowsjayz7ujjsc 1fh1;p:- through $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costig8 )h r 49ebu.be;ew9w/fdxss $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/.yyg wpqs /k/cs)cq* the rate of 2.0 hp has 60% efficiency. How much current does it draw from a 120-V lipq*yqsc)ky./c// g wsne? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac power source. W+13n crn.y3oq ;hzpj what rms current flows through this de.w 3zq j;py1n 3hnr+ocvice?

  A 500-W device is connected to a 120-V ac powe -xi xk912cvzgr source. What peak current flows zkv 19x-i2gxc through this device?

  A 500-W device is connected to a 120-V ac power source. x2w8: yl mya+z 023viwn874a qta lsvhWhat is the peak voltage across this devicwwvslz82l 7hxn 3a0yy am+qt4:8ia 2ve?

  The diameter of a copper wire is 0.081 inch. The mcj-bm:s1yoc ;u5 6 ig0rwm 8ilaximum 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? (The number of electron carriers in one cubic centimetbo0r cyclg mm j: w1sui86i5-;er of copper is $8.5 \times 10^{22}$.)