ISRO Electrical Engineering (EE) 2013 - Question 25

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The applied voltage of a certain transformer is increased by 50% while the frequency is reduced by 50%. The maximum core flux density will become ---

  • A. three times
  • B. 1.5 times
  • C. 0.5 times
  • D. will remain the same.

Answer: A. three times

Explanation: Bm ∝ V/f = 1.5/0.5 = 3 times.

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