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Please help me with this physics question

Discussion in 'Pre-Medical - MD' started by yimfong, Apr 22, 2004.

  1. yimfong

    yimfong Junior Member
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    In the following circuit diagram, 5 identical electrical appliances rating "125W, 5V" are connected with the secondary coil of a 10:1 step down transformer. The current flowing through the primary coil of the transformer is 0.4A. Assume that there is no resistance in the coil.
    Q: What is the efficiency of the transformer?

    I will be highly grateful if u can show ur steps and explainations to me because the efficiency i got is over 100%!
    Thanks!
     

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  2. klinzou

    klinzou Senior Member
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    This being an ideal transformer?
     
  3. yimfong

    yimfong Junior Member
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    Must not be since the question requires you to calculate the efficiency,
     
  4. india7

    india7 Member
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    I don't know how much I can help on the actual question but check out examkrackers.com They are an MCAT review service but have some great help with physics/all premed classes. Their physics review book is really helpful, explains things in a good, clear language.
     

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