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21 September, 02:24

A transformer has a primary voltage of 115 V and a secondary voltage of 24 V. If the number of turns in the primary is 345, how many turns are in the secondary?

A. 1,653

B. 690

C. 72

D. 8

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Answers (1)
  1. 21 September, 05:41
    0
    There are numerous information's of immense importance already given in the question.

    Primary voltage of the transformer (V1) = 115 V

    Secondary voltage of the transformer (V2) = 24 V

    Number of turns in the primary (T1) = 345

    Let us assume the number of turns in the secondary = T2

    Then

    (V1/V2) = (T1/T2)

    (115/24) = 345/T2

    115T2 = 345 * 24

    115 T2 = 8280

    T2 = 8280/115

    = 72

    So the correct option among all the options given in the question is option "C".
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