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Homework Help: The current and power drawn by the load

  1. Feb 7, 2010 #1
    1. The problem statement, all variables and given/known data
    A 36Ω resistive load is connected to the secondary of a transformer. The terminal p.d. at the secondary is 24v. If the primary is connected to a 480v a.c. supply, calculate:

    a) the transformer turns ratio
    b) the current and power drawn by the load
    c) the current drawn from the supply


    2. Relevant equations
    1: V=IR
    2:Vp/Vs=Np/Ns=ip/is
    3: Np:Ns
    P=IV

    3. The attempt at a solution
    a) Is=Vs/R = 24/36=0.667A
    P=0.667Ax24V=16W

    b) Ip=current drawn from the supply
    Ip=Vp/R = 480V/36Ω=13.3A

    Not sure if I'm getting this ok
    Can somebody please check - thank you:smile:
     
    Last edited: Feb 7, 2010
  2. jcsd
  3. Feb 14, 2010 #2
    Re: Transformer

    I have a solution for this thread. Please consider it closed.
     
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