In an ideal transformer the no-load primary current

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In an ideal transformer the no-load primary current:

  1. Lags Vp by an angle between 0° and 90°
  2. Leads Vp by 90°
  3. Lags behind Vp by 90°
  4. Is in phase with Vp
  5. None of above

Correct answer: 3. Lags behind Vp by 90°

Explanation: The coil of an ideal transformer is purely inductive. For a purely inductive circuit, the current lags voltage by 90°, therefore, the magnetizing current induced in transformer lags the input voltage by 90°.

More MCQs on Transformers.

Also study:

  1. Energy losses in transformers
  2. What is a Linear Variable Differential Transformer
  3. Scott-T Transformer
  4. What is a potential transformer
  5. Construction and working of air-core transformers
  6. Why core saturation happens in transformers and what are its effects

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