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sedighn

  • 3 years ago

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.)

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  1. imron07
    • 3 years ago
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    \[R=\rho L/A\]

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

  3. sedighn
    • 3 years ago
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    Is that correct? :o

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

  5. sedighn
    • 3 years ago
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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

  6. imron07
    • 3 years ago
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    :)

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