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Is this transformer question correct?

Discussion in 'Electronics Homework Help' started by Angela, May 15, 2017.

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  1. Angela


    May 15, 2017
    Transformer has 1968 windings and 492 windings (4:1) and the input current is 1 amp. Output current is?
    A. 250 mA
    B. 4 A
    C. 500 mA
    D. 2 A

    This is from a practice test my teacher made up. The 'correct' answer is B)4 A, but I think it should be A)250 mA. Thoughts? Thank you!
  2. duke37


    Jan 9, 2011
    I wish people would not use the term windings for turns.

    The transformer has a turns ratio of 4:1 so the voltage will be 4:1 and the current will be 1:4.
    It all depends on which winding is the primary. It is not specified in the question.
    Angela likes this.
  3. Angela


    May 15, 2017
    Thank you! That really helps me anyways.
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