A device that produces electricity by transforming c( twr(nzjkb5hoao 4k0mtn:*1hemical energy into electrical enert rbzno5:(k jn1mka(4*wt0h ogy is called a

  A car battery

  The total amount of charge that passes through a wire's full croc6ox .r:pt3wwn b6so7 ss section at any point per unit of time is referred to n xww: rso37otc.p6b6 as

  The direction of convention current is taken to e7uad9(pmg w : 91lyaqbe the direction that

  A coulomb per secondvfs4cg ai *t;(:r,,p nrhgt,t is the same as

  Car batteries are rated in "amp-hours.nb )evqea+a8vm;4 sl3 " This is a measure of their

  The resistance of a wire is defic i,asb2 x9lx/ned as

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

  The resistance of a wir9s uoprf92 nv2e is

  The resistivity of a wire depends onh,2 m,s.wesceq - ya6q

  Which conducting material has the lowest resistivity value hrq24slk+y e4*u ma hv11m,zt?

  Consider two copper wires. One has twice the l 0.x )dm3gxuwm kd;uz3ength of the other. How do the resistivities of thesd)w m ;. gm3x0dkz3uxue two wires compare?

  Consider two copper wires. One has twice the length of t:+r /8jy)omjty x jjo/;,ts kahe other. How do the resistances of these m8/ jo jt/ryt;+x,j)ykaoj :stwo wires compare?

  Consider two copper wires. One has twice the cross-section1* l qec:dbd+/zryxx+z9 pg2;p,sfdqal area of the other. How frg; + xy9s*q2qdlec/1b+zp :p,dzxd do the resistances of these two wires compare?

  Consider two copper wires. One has twice the length and twice the cross-secti75*mjxo7i haql lhu 4w3ag;k 9onal area of oh5 j *lalg x794iua7;mh3kqwthe other. How do the resistances of these two wires compare?

  The length of a wire is doubled a v 3q;r2x*ca ztk3npk)( m99o p9jjjjbnd the radius is doubled. By what factor does the resistanc3 j9pvnjtcq*moj 9b( z kk)p239; xjrae change?

  How much more resistance does a 1.0 cm diameter rod have com ;uqk,p3m9omr* c27dracbg (g pared to a 2.0 cm diameter rod of the same length a;ccd,q3a 7 ob2r9 up(mrgm*gknd made of the same material?

  The resistivity of most common mefq i9ef1mzr 0v-z/ u9htals

  Negative temperature coefficients of r5nlw2 2o 0ely5z*gaswesistivity

  What is 1 W equivalen4cy/pxn6k w r6t to?

  A kilowatt-hour is equivalent tos k;yu(p 1 py1md7:l -jdhxd.uy s4,xi

  If the resistance in a constant voltage ci+*s +7wmv kg g:uf-rfrrcuit is doubled, the power dissipated urvfm 7 s*++kw-gr:fgby that circuit will

  If the voltage across a circuit of constant resistance is doubled, the pia3 wv+.. rn9 tah7nkmower dissipated by that cav m+.3t.ar9hn wkn i7ircuit will

  If the resistance in a circuit with constant current flowing qk qc*u*xuq6/ is doubled, the power dissipated bu*/xkq6 uq*q cy that circuit will

  If the current flowing through a circuit of constantw2 bv7dk4y ncy+ )tbp+v.i*cm resistance is doubled, the power dissidn yp+t 7+c.vkc4*i)yb wvb2mpated by that circuit will

  During a power demand, the voltage output is reduced by 9 f 7dgawh7z;mrymauiw,j i,*; vys;-5.0%. By what percentageuwhj;ymv, g7yd;wsm9; - 7ai*r zif,a is the power on a resistor affected?

  A current that is sinusoidal 748s( ufvs5 snkbmb i(with respect to time is referred to as

  Consider two copper wires each carrying a current of 3.0 A. g3t6:azn3)w, q 3c: lv llwmkk One wire has twice the diametew,a nw gl6m33)lvkc 3 tzqkl::r of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger diameter wire is

  Materials in which the 7m 67yzrjwcvbfwt, o2g9a:l.resistivity becomes essentially zero at very low temperatures are rg 7cy7z awjo, rm :2wt.96lfbveferred to as

  What current is flowing if 0.67 C of charge pass winkba4 b7 fzfn,tncr9* 2++ xa point in 0.30 s?

  A charge of 12 C pas l23iqqh8 q5-jd4pmd gses through an electroplating apparatus in 2.0 min. What is t4ph3 mj- 2igq qd8ld5qhe average current?

  How much charge must pass by a point in 10 s for the current t4 xag*kn/jd xgpi42v 5o 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 flowl3/p(:rts*c qu wt 8qnitq,/wing 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 curren6 b8v8jpkkl4wspy 1p-t, has been left on for 10 min. What is the ne sw kyk14pjv-6pp 88blt number of electrons that have passed through the coffee maker?

  In an electroplating process,*q cv/jq+jl8 h s go4d1t,8adi it is desired to deposit 40 mg 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 silver? (The silver ionsj ai*d,8l/hc 1os4 vd+t8qgj q are singly charged, and the atomic weight of silver is 108.)

  What potential difference is required to cause 4.00 A to flow througtxd5y/ :qk2.l nr1mphh a resistance.rd:k5 2nyxlh m/q1 tp of 330 W?

  What is the voltage across a 5.0-W resistor + gb:rbpa0 /wt8gnl6fif the current through it is 5.0 A?

  A 4000-W resistor is connected across 220 V. What current v am m0rso8;)ewill flow?

  A light bulb operating at 110 V draws 1.40 A of current. What is its resistancsa 1t;npq 1ke+enp1t s1ke+q a;?

  A 12-V battery is connected to a 100-W resistor. l*+f2.j)z smdf(jc: cf)wjikHow many electrons flow through th)fm*jj.:)+k2i( dsc ffc jzwle wire in
1.0 min?

  What is the resistance of 1.0 m copper wire of diameter 0.40 inch? (The resim -o7kumiph iopk.),1up4sa7stivity of comois7ua.kpi p7o)hum 14 p, -kpper is $1.68 \times 10^{-8} \; \Omega \cdot m$.)

  What is the resistance of a cir+,fijgnf8 s*icular rod 1.0 cm in diameter and 45 m long, if the resistiv,in j8f sg*+fiity is $1.4 \times 10^{-8} \; \Omega \cdot m$?

  What length of coppe,ljfn3 ;b*q i zu0w,oeyljml- 1p*wc.r 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 (resistivi* ibn9e7z f 1:cn5ibokty $1.68 \times 10^{-8} \; \Omega \cdot m$) 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 9 hiv1 :as)3wytuq :.wb afn4fohms. What is its resistivity?

  Calculate the current through a 10.0-m longe;w 2uw1vzw 47ep:hro 22 gauge (the radius is 0.321 mm) nichrome ewev r4w71:uz;o h w2pwire if it is 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 g6-o9wta n7 bao 9hy:elong and of rectangular cross-section, 1.0 cm x 2.0 cm. What is th-h ao 97o6tw9yang:ebe 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 7-upmvrcajn m;m: ;:vmm 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 couh-4*y bo:)7wspmk oeq9fma 6pper wire (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 a resyx c ua4 qg;s,,x3z*lvy*4tk x6v/vp3 bzhm/o istance 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 rv6sy9,)dy-y 2eiu 4pj bae;mkesistivity 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 meltikns-9vi :cee7p. si,kng point of indium. The resistance o-:9pc,eei i.sv sk7nkf the 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 th4 ;ty d)w/tmiirough an $10.0 \; \Omega$ resistor. How much power is being dissipated?

  A 110-V hair dryer is rated y7j-kj.nx 1(cd6u gdvat 1200 W. What current will it draw?

  A 150-W light bulb running on 110 V draws how much curren:2 q2fr sqz+t6 s o9fs2zg3jfi0t dbn-v)(mrlt?

  What is the nominal resistance of a 100-W light bulb designed to be used ix bp cr;zrfm)e/5 /3-d;damp in a 120-V cx/ car;m3d;rbizedp 5p )-fm/ircuit?

  A toaster is rated 800 W at 120 V. What is the resistances0 2c*td3ys*k6 yvqjn of its heating element?jn**y0q2cs 36dtksvy

  A 200-W resistor is rated at-iq l w-)h4kkt $1/4 \; \Omega$. What is the maximum current it can draw?

  A 200-W resistor is rp 7kbeps.4ebttw3mn, f+ -ph7ated at $1/4 \; \Omega$. What is the maximum voltage?

  A lamp uses a 150-W bulb. If it is used at 120 V, whatx4 b vwdp9 6t+zy(xd.vjm9- lx current does it draw?

  A lamp uses a 150-W bulb. If ibi))1n 8n-l /r-epi(+wfwu h/rjixxv t is used at 120 V, what is its resistance?

  A 25-W soldering iron runs on 110 V. What is its resistance? 3* q/;imutvcj

  How much does it cost to operate a 25-W soldering iron for 8* 4pmmcct7*y qb8uod ho ,0m2nql5lx1.0 hours, if energy costmonq5 48l01c* 2m qtbylxd7 ph u*oc,ms $0.08/kWh?

  How much energy does a 100-W light bulb usesyo9 *-xp s7ud in 8.0 hours?

  A 1500-W heater is connected to a 120-V line for 2.0 hours. How much i8am+aa: v/ dtheat energy is prod/8a+ imta:vaduced?

  A battery is rated at 12 V and h60ht(h w qn*u160 A-h. How much energy does the battery store?ht*w(qh 06n uh

  How much energy does a 25-W soldering ir )f;oof 8i3nllon use in 8.0 hours?

  A 100-W driveway light bulb is on 10 hours per day. Assumo 8qgp -xu9h*5bq4 erring the power company charges 10 cents for each kilowatt-hg4rqp -95x*8bqo uhr eour of electricity used, estimate the annual cost to operate the bulb.

  A 400-W computer (computer plus monit.,sxly.bn bbc8k(c;8yq u ju2or) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much uc8 j sbq2nx.b(uckyy, b;. l8does it cost to run the computer annually?

  The monthly (30 days) electric bill inclut(k:d) s led* f1szd3gded the cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connectiok)d ed1sfg tlz3(s *d:n 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 elecz +j aad2hqwpy+zib0*/)v-k ztric 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 onzzva ya+0)*/p z-bi 2hjkw+d q its temperature.) What effect will the repair have on the power dissipated in the heating element?

  14 A of current flows thrfs;jjv +yr -+ypb4p m:ough $8.0 \; \Omega$ resistor for 24 hours. How much does this cost if energy costs $0.09/kWh?

  A 9.0-V battery costs/x qq69nkqol5g:t0)el lq2 n q $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 muc.7cqmj3a cq.5c*. ul n2wy cmxh current does it draw from a 120-V lin jn.xm. 2l. 7amyuqq 3ccccw5*e? ($1 \; hp = 746 \; W$)

  A 500-W device is connected to a 120-V ac po 8eoo4 wm*pc1ower source. What rms current flows 48*1p cowmeo othrough this device?

  A 500-W device is connected to a 120-V ac power source. What peak curr*0u4 hddkgumh1dfm +0ent flows through this de* kgfu1dh+ mmu4hd00dvice?

  A 500-W device is connected to a 120-V ac power source. What is the peakgy. 7)niqchn+ voltage across this dei nhcng+q) y.7vice?

  The diameter of a copper wire is ,8c )i wcql2dp:uk 5sh u b0f)oikvf940.081 inch. 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 the electrons? (The number of electfckvlo5 si2w upq)0 kh:8db,94u fi c)ron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)