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Homework: Autotransformers and math problems

  1. Nov 3, 2004 #1
    I am having a very difficult time trying to figure out a question on my physics homework. I really am not even sure how to begin to work the problem out. Can anyone please help get me started?

    The question is:

    An autotransformer has an EMF source of 240 volts, only 20% of the autotransformer will be used. The step-up transformer is supplied with 30,000 Watts of power and has a turn ratio of 500:1. Based on the information calculate the following: voltage primary, voltage secondary, current primary, current secondary, and power secondary.
     
  2. jcsd
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