Recent content by jony529

  1. J

    Resistance and resistivity problem

    The thrilling conclusion to my problem: rho = rho(i)alpha(T-T(i)) + rho(i) R = rho(L/A) Find R. {(L/A)} * {rho} = {(L/A)} * {rho(i)alpha(T-T(i)) + rho(i)} which equals R = R(i)alpha(T-T(i)) + R(i) 2250 ohms = 634(4.4x10^-3)580 + 634
  2. J

    Resistance and resistivity problem

    BTW the answer is 2250 ohms. Like I said originally it was a quiz online I just took. But how do I arrive at that answer??
  3. J

    Resistance and resistivity problem

    Sorry but I didnt fully understand what you were trying to tell me. I know R = rho(L/A), So if I pick an arbitrary length say 10m. How do I find that A of the wire, and furthermore what's canceling out? Confused!
  4. J

    Resistance and resistivity problem

    Hey I had a question on my quiz where it asked for the Resistance of aluminum at 600 deg C. But the formula rho-rho(i) = rho(i)a(T-T(i)) only finds the value of the resistivity at 600 deg C how do I convert it to resistance without more given info? Question: A spool of aluminum wire has a...