Recent content by cmathis

  1. C

    How Long Can Copper Wire Be in a Data Center to Limit Voltage Drop to 1V?

    I know. I left that variable as "A" in the answer (cross section area) because it wasn't given to me in the problem. The rest of the work looks fine though?
  2. C

    How Long Can Copper Wire Be in a Data Center to Limit Voltage Drop to 1V?

    Homework Statement Your data center has 100,000 CPUs. Each burns 100 W at 120 V. Copper has a resistivity of 1.7E-8 Ω*m. What is the maximum length of copper wire on the power supply to give a voltage drop of no more than 1V? Homework Equations P = V*I R = (rho*L)/A, where L is the...
  3. C

    Engineering Simple R/L Circuit Current Problem

    Ok great. But what about part b? The limiting current in the inductor is 1mA, but it never really reaches that current, so t=infinity.
  4. C

    Engineering Simple R/L Circuit Current Problem

    I'd get: http://img145.imageshack.us/img145/5180/screenshot20130330at324.png right? So the above equation is right, but now \tau = 0.001. So i(2ms) = 0.865mA.
  5. C

    Engineering Simple R/L Circuit Current Problem

    (oops... ignore this post. I'll fix it soon.)
  6. C

    Engineering Simple R/L Circuit Current Problem

    Homework Statement http://img202.imageshack.us/img202/8355/screenshot20130330at234.png a) The switch closes at time t=0. What is the current flowing down through the inductor at time t=2ms? b) What time will it take for the inductor to reach maximum current? c) How long will it...