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Category > Applied Sciences Posted 14 May 2017 My Price 5.00

One end of an aluminum wire of 0.125 cm in diameter

One end of an aluminum wire of 0.125 cm in diameter is welded to a copper wire of 0.25 cm in diameter. The composite wire carries a current of 8 mA. What is the current density in each wire?

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Alpha Geek
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Status NEW Posted 14 May 2017 06:05 AM My Price 5.00

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file 1494743364-Answer.docx preview (94 words )
O-----------ne -----------end----------- of----------- an----------- al-----------umi-----------num----------- wi-----------re -----------of -----------0.1-----------25 -----------cm -----------in -----------dia-----------met-----------er -----------is -----------wel-----------ded----------- to----------- a -----------cop-----------per----------- wi-----------re -----------of -----------0.2-----------5 c-----------m i-----------n d-----------iam-----------ete-----------r. -----------The----------- co-----------mpo-----------sit-----------e w-----------ire----------- ca-----------rri-----------es -----------a c-----------urr-----------ent----------- of----------- 8 -----------mA.----------- Wh-----------at -----------is -----------the----------- cu-----------rre-----------nt -----------den-----------sit-----------y i-----------n e-----------ach----------- wi-----------re?----------- A-----------nsw-----------er ----------- Cu-----------rre-----------nt -----------den-----------sit-----------y =----------- cu-----------rre-----------nt/-----------are-----------a -----------Cal-----------cul-----------ate----------- th-----------e a-----------rea----------- of----------- th-----------e w-----------ire-----------s. -----------The----------- ar-----------ea -----------for----------- a -----------cir-----------cle----------- is----------- pi-----------*r^-----------2. -----------For----------- th-----------e s-----------mal-----------ler----------- wi-----------re,----------- 3.-----------14*-----------..0-----------625-----------^2 -----------= 0-----------.01-----------226-----------5cm-----------^2.----------- Fo-----------r t-----------he -----------lar-----------ger----------- wi-----------re,----------- 3.-----------14*-----------.12-----------5^2----------- = -----------.04-----------91 -----------cm^-----------2.Â----------- No-----------w u-----------se -----------use----------- th-----------e a-----------bov-----------e e-----------qua-----------tio-----------n.
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