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sedighn Group Title

What would be the resistance of a piece of aluminium wire 1.8 mm in diameter and 10 m long?(The resistivity of aluminium is 2.8 × 10–8 Ω m.)

  • one year ago
  • one year ago

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  1. imron07 Group Title
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    \[R=\rho L/A\]

    • one year ago
  2. sedighn Group Title
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    Yes so for A I did... π * ((0.9)^-3)^2 and got 5.91 m^2

    • one year ago
  3. sedighn Group Title
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    Is that correct? :o

    • one year ago
  4. imron07 Group Title
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    if you mean \(A=\pi\times(0.9\times10^{-3})^2\), you're correct.

    • one year ago
  5. sedighn Group Title
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    Oops now I realise why I've got the wrong answer... I forgot to add in the x10 bit :P Thank you

    • one year ago
  6. imron07 Group Title
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    :)

    • one year ago
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