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A transformer with 5500 turns in its primary is used between a 240V a. c...

Physics
WAEC 1988

A transformer with 5500 turns in its primary is used between a 240V a. c supply and a 120V kettle. Calculate the number of turns in the secondary

  • A. 11000
  • B. 2750
  • C. 460
  • D. 232
  • E. 10
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Correct Answer: Option B
Explanation

\(\frac{E_p}{E_s}\) = \(\frac{n_p}{n_s}\)
\(\frac{240}{120}\) = \(\frac{5500}{n_s}\)

=> n\(_s\) = 2750

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